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ANZOS | Photonics and Optics (ANZCOP)Poster
High-Repetition-Rate Raman lasers are an effective way to expand the wavelength range of short laser pulses and fulfil the special requirements for applications such as metrology, sensing, fundamental research and industry. Here, a synchronously-pumped diamond Raman laser at 1240 nm was firstly demonstrated with repetition-rate up to 1.84 GHz and pulse duration of 41 ps. A symmetric diamond...
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ANZOS | Photonics and Optics (ANZCOP)Invited talk
High-power single-frequency lasers with controllable spatial modes are highly desirable for coherent detection, precision measurement, remote sensing, and nonlinear optics. However, simultaneously achieving high power, narrow linewidth, low noise, and flexible spatial-mode control remains challenging. In this presentation, we will introduce our recent progress in high-power single-frequency...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
Ionising radiation is an important source of unwanted events in cryogenic devices, including superconducting qubits used in quantum computing and cryogenic sensors used in rare-event searches. Tagging these radiation-induced events requires a detector that can operate inside the cryogenic environment without introducing significant heat load or occupying excessive space.
In this talk, we...
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Hayden Greer (University of Sydney)AIP | Astronomy (ASTRO)Invited talk
The Near Infrared Camera and Multi-Object Spectrograph (NICMOS) instrument aboard the Hubble Space Telescope was the highest resolution near-infrared imager in space before the James Webb Space Telescope, with an extensive archive of high-resolution and high-contrast surveys. The HST PSF is imperfectly known and strongly time-varying, due to breathing mode oscillations in the optical...
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AIP | Nuclear and Particle Physics (NUPP)Poster
Expanding our knowledge of the full, non-perturbative structure of the photon-fermion vertex importantly contributes to areas such as: Confinement, hadron phenomenology, and dynamical mass generation. We will be presenting one of very few attempts to solve the non-perturbative interaction directly, using its own Schwinger-Dyson equation within quantum electrodynamics. The majority of previous...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Collisions between ions and atoms are found in a wide range of environments, including planetary atmospheres, fusion plasmas, and hadron therapy for cancer treatment. To model and analyse these environments, accurate cross sections are required for a range of atomic processes, including ionisation and excitation. Calculating these cross sections is particularly challenging for collisions with...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
My focus is a general spin Hamiltonian for so-called orthochromites $R$CrO$_3$ ($R$ = rare earth, Sc, and Y). The $R$CrO$_3$ has received much interest as an electrode material, an interconnector for solid-state fuel cells, and a magnetocaloric effect for refrigeration. However, there is little understanding because of the availability of large single-crystal samples. We successfully obtained...
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Akib Karim (CSIRO)AIP | Quantum Science and Technology (QST)Contributed Oral
We propose a hardware efficient quantum residual neural network that implements non-unitary operations using ancilla qubits to allow for the same expressivity but significantly lower depth than traditional unitary quantum machine learning. In contrast to previous implementations of residual connections, our architecture avoids post-selection to ensure minimal measurement overhead. In order to...
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AIP | Physics Education (PEG)Contributed Oral
Most school science textbooks present a classical interpretation of energy. While this provides a good approximation for describing macroscopic phenomena, it does not accurately depict the Einstein’s mass-energy (E=mc^2), nor Planck’s quantisation of energy (E=hf) relationships. For instance, it overlooks the subtle change in mass between reactants and products in a chemical reaction....
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Magnetic field effects (MFEs) and magnetic isotope effects (MIEs) have been proposed as potential modulator of adenosine triphosphate (ATP) synthesis via a transient spin dependent intermediate due to coupling between adenosine diphosphate (ADP) and a free ion. The hypothesis originally advanced by Buchachenko et al.[1] has motivated significant theoretical and experimental interest;...
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AIP | Physics Education (PEG)Poster
Physics lab courses have become an integral part of physics education. Recent studies have suggested that labs in physics education have little impact on learning, particularly when intended to reinforce content knowledge, which becomes the most widely adopted goal. This encourages institutions to reevaluate the implementation of physics lab courses, since they are time-consuming, demanding,...
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ANZOS | Photonics and Optics (ANZCOP)Poster
Hydrogen is attracting increasing interest as a clean energy carrier, driving demand for sensitive remote sensing technologies for leak detection and monitoring. More broadly, remote gas sensing is important for environmental, industrial, and safety applications. Raman LiDAR provides a selective and spatially resolved approach based on the characteristic Raman signatures of different molecular...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Optical microresonators have been successfully employed in self-referenced laser frequency stabilization, narrow-linewidth laser development, and nonlinear optical conversion. To simultaneously carry out these applications with a single microresonator would be highly useful to the development of advanced laser sources with enhanced performances and functionalities.
In this work, we present...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
AlGaAs/GaAs crystalline coatings are promising for future gravitational-wave detectors due to their low mechanical loss and superior optical properties. However, their high optical absorption at 532 nm precludes the use of conventional arm-length stabilization schemes based on 532 nm auxiliary lasers.
We present an alternative arm-length stabilization scheme employing an auxiliary laser at...
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Mr Julian Whichello (School of Biomedical Enginering, University of Syney)AIP | Solar Terrestrial and Space Physics (STSP)Contributed Oral
Over the past decade, the global space sector has experienced a surge in small satellite deployments, with several thousand entering orbit annually. Propulsion modules are used for attitude control, station keeping and both orbital and de-orbiting manoeuvres, all of which affect the range, capability and lifetime of a mission.
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In this paper we report on the development and testing of pulsed... -
COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Porous silicon is a unique nano-material exhibiting low optical losses in the infrared, high electrical resistivity (50 GΩ.cm) and low thermal conductivity (0.15 W/m.K). Our 100 µm thick 80% porosity porous silicon layer is formed through the annodisation of a 2” silicon wafer (p-type 0.1 Ω.cm), using a HF/Ethanol electrolyte followed by critical point drying. By laser writing onto the...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Low noise microwave receivers – which are essential for satellite communications, radar, and radio astronomy – require first stage amplifiers to boost the received signal while adding as little noise as possible. In room temperature applications, the current best-in-class high electron mobility transistor (HEMT) based amplifiers have noise temperatures that scale poorly with frequency –...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Silicon spin qubits in gate-defined quantum dots build on the mature semiconductor manufacturing ecosystem, offering a scalable platform for quantum computing. Using spin-3/2 semiconductor holes instead of spin-1/2 electrons enables very fast spin control through the spin-orbit interaction while retaining the key advantages of quantum dot architectures [1-6]. However, the development of...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum computers will require quantum error-correcting codes. Bivariate Bicycle (BB) codes, a family of qLDPC codes, provide higher encoding rates than planar alternatives such as the surface code. This comes at the cost of requiring some long-range (beyond nearest-neighbour) qubit connections.
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Current simulations of BB codes assume long-range connections are equally as costly as... -
Lewis Hill (Max Planck Institute for the Science of Light)ANZOS | Nonlinear Photonics (ANZCOP NLPH)Contributed Oral
Optical bistability and spontaneous symmetry breaking (SSB) are fundamental nonlinear phenomena in Kerr resonators, underpinning applications including optical switching, logic operations, random number generation, and photonic information processing [1,2]. While these effects are well understood in simple configurations, analytical access to their stationary states and bifurcations becomes...
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ANZOS | Photonics and Optics (ANZCOP)Poster
Anti-resonant guidance has become an important concept for understanding and engineering wave confinement in structured media. In acoustics, recent work has begun to explore antiresonant confinement in cylindrical waveguides in Brillouin scattering experiments, but existing treatments have thus far focused on single-layer structures. In this work, we provide a general method for analysing...
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AIP | Solar Terrestrial and Space Physics (STSP)Contributed Oral
The Sun emits light in the 100-200 nm wavelength range, known as the vacuum ultraviolet (VUV). Whilst the Solar VUV is absorbed by atmosphere and thus not observed on the Earth's surface, it plays a significant role in physical processes in our Solar system. Molecular dissociation of oxygen by the Solar VUV results in the formation of ozone and photoionization of nitric oxide forms Earth’s...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Abstract: Microelectromechanical systems (MEMS) are of great interest for applications that require field-portability due to their small size, weight, power and cost (SWP+C). Similarly, MEMS-based Fabry–Pérot filters (FPFs) are of great interest for developing micro-spectrometers for numerous remote-sensing spectroscopy and imaging applications, thereby overcoming the non-portability...
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Dr Bram Slagmolen (Australian National University)AIP | General Relativity and Gravitation (ASGRG)Contributed Oral
Newtonian noise, or gravitational fluctuations from local moving mass, is a low Fourier frequency noise source that will limit next-generation ground-based gravitational-wave detectors. At the Australian National University, we are developing an opto-mechanical torsion pendulum sensor for direct detection of Newtonian noise, consisting of two suspended orthogonal pendulums that rotate...
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Shijie Li (The Australian National University)AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Achieving Bose-Einstein condensation (BEC) of metastable helium-4 (⁴He*) requires tight final confinement to raise phase-space density during evaporation. This is commonly supplied by bi-planar quadrupole-Ioffe or quadrupole-Ioffe magnetic traps, but their coils restrict optical access for flexible beam geometries [1-3]. A tunable blue-detuned optical box or semi-box with weak magnetic...
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205. A unified optical platform for non-Gaussian and fault-tolerant Gottesman-Kitaev-Preskill statesAIP | Quantum Science and Technology (QST)Contributed Oral
Non-Gaussian optical states are essential resources for continuous-variable quantum technologies, enabling fault-tolerant quantum computation, enhanced quantum communication protocols, and quantum metrology beyond the classical limit. However, their experimental generation typically relies on high-photon-number Fock states or strong optical non-linearities, making scalable implementations...
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Maarten Christenhusz (University of Queensland)AIP | Quantum Science and Technology (QST)Contributed Oral
Superfluids exhibit frictionless flow past an obstacle below a critical velocity. Beyond this threshold, dissipation emerges through the nucleation of quantised vortices, opening the pathway to quantum turbulence. Although the critical velocity has been studied extensively, its dependence on obstacle shape is still not fully understood. We investigate whether a universal geometric description...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
Theoretical descriptions of heavy-ion nuclear fusion remain largely phenomenological, often exploiting complex-valued potentials to absorb flux and associating the deficit in the norm of outgoing waves with fusion observables. This makes it challenging to simultaneously and consistently describe related reaction outcomes, such as exchange of nucleons at large distances prevalent in super-heavy...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Recent astronomical detections of sulphur-bearing carbon-chain molecules, including HCSCN and HCSCCH, in cold interstellar environments have renewed interest in the gas-phase chemistry responsible for their formation. Despite their astrophysical relevance, the underlying reaction mechanisms and product branching remain poorly constrained, limiting the reliability of chemical models of sulphur...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Abstract
Undesired backscattering induced by spatial disorder, such as fabrication imperfections and material-composition fluctuations, is a central limitation in reciprocal optical waveguides, which serve as fundamental building blocks of a broad range of classical and quantum photonic systems. Suppressing spatial-disorder-induced backscattering in waveguides has therefore been a...
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AIP | Quantum Science and Technology (QST)Poster
We report the frequency stabilisation of a 674-nm vertical external-cavity surface-emitting laser (VECSEL) and characterisation of its absolute frequency noise, utilising a three-cornered hat measurement. The 674 nm wavelength addresses the $\textrm{S}_{1/2}$ → $\textrm{D}_{5/2}$ electric quadrupole transition in $^{88}\textrm{Sr}⁺$. This ion species is widely used for quantum computing,...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Optical tweezers enable contactless manipulation of nanoparticles and find applications in biology, physics, and chemistry. Both conventional optical tweezers and their counterparts based on nanostructured metals (plasmonic tweezers) rely on Brownian motion to load the trap, which can be slow. Here, we address this limitation by demonstrating a device that uses the AC electro-osmotic (ACEO)...
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AIP | Quantum Science and Technology (QST)Invited talk
Rare-earth quantum memories could fulfil several roles in future quantum networks, including long-lived memories and quantum light sources for repeaters, high-capacity cache memories for quantum computers, and interconnects for heterogeneous quantum processors. These applications demand memory efficiencies above 90%, fidelities exceeding 99.9%, storage capacities of more than 1000 modes, and...
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AIP | Quantum Science and Technology (QST)Poster
Sparse near-surface arrays of donor atoms can be engineered in silicon by means of deterministic single-ion implantation [1,2] and used to realise diverse donor-spin qudit processor architectures for quantum computing applications [2,3]. The ¹²³Sb isotope (nuclear spin I = 7/2) has emerged as a promising high-spin donor-qudit platform in silicon, with recent work demonstrating coherent...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Fabrication-induced wavelength shifts remain a major limitation in silicon photonic wavelength multiplexers, leading to channel misalignment and degraded spectral performance in dense wavelength-division multiplexing systems [2,3]. Here, we demonstrate a fully packaged silicon photonic chip fabricated on the imec iSiPP50G platform, integrating a 12-channel, 50 GHz bidirectional arrayed...
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Wenhao Liu (Institute of Photonics and Optical Science (IPOS), School of Physics, University of Sydney, NSW 2006, Australia. ARC Centre of Excellence for Optical Microcombs for Breakthrough Science (COMBS), School of Physics, University of Sydney, NSW, Australia)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Driven optical Kerr resonators have attracted considerable interest as platforms for nonlinear dynamics, frequency comb generation and temporal cavity solitons [1,2]. While microresonators have achieved high quality factors, implementing intra-cavity dispersion control and spectral filtering remains challenging and can introduce loss, increasing the power required. These challenges have...
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José Carlos Amaral Rocha (University of Exeter & The University of Queensland)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Introduction
Wavefront shaping is a powerful tool in modern photonics, enabling precise control over how light propagates through free space and complex media. Conventionally this control comes from a single phase plane displayed on a spatial light modulator (SLM), yet one plane cannot realise the many-to-many mappings that tasks such as mode sorting, optical routing, and arbitrary basis...
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AIP | Quantum Science and Technology (QST)Contributed Oral
The quantum state of a levitated nanoparticle can be achieved by cooling the center-of-mass motion to
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the ground-state. Delocalizing this state to increase position uncertainty to a scale comparable to the particle's
physical size is yet to be realized. Expansion protocols for this are limited primarily by decoherence due to
photon recoil, dephasing and shot-to-shot noise. This suggests... -
Lane Scheel (Australian National University)AIP | General Relativity and Gravitation (ASGRG)Contributed Oral
The Torsion Pendulum Dual Oscillator (TorPeDO) experiment [1] aims to directly detect Newtonian noise, a fundamental limit to the low-frequency sensitivity of future terrestrial gravitational-wave detectors. TorPeDO employs a four-stage seismic isolation chain comprising an inverted pendulum, a vertical geometric anti-spring (GAS) filter, an intermediate mass, and a penultimate mass from which...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Raman spectroscopy is a powerful optical spectroscopy technique that provides a molecular-level fingerprint through inelastic light scattering. However, Raman signals are often weak and obscured by the presence of a strong fluorescent background. Raman scattering arises from an interaction with a virtual state, which is very short-lived. In contrast, fluorescence occurs through excited-state...
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Dr Yan OsoskovANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Visible fiber lasers are attracting increasing research attention due to their potential applications in biophotonics, display systems, laser processing, etc. [1]. Among available glass hosts, silica offers unmatched mechanical robustness, chemical durability, and technological maturity, making it particularly attractive for deployment outside the laboratory. Despite these advantages, visible...
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Aman Desai (University of Adelaide (AU))AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
We present open-source agentic AI frameworks, RooAgent and FCCAgents, that apply large language models (LLMs) to automate HEP analysis workflows through natural-language interaction, while keeping all physics computation within established, validated software.
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RooAgent exposes ROOT-based analysis operations — histogram inspection, event selection, kinematic-distribution visualisation,... -
AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Hund's first rule succeeds in ordering atomic excited term multiplets only about half the time; the alternating rule repairs this limitation by tying the singlet–triplet sign to the relation between coupled and uncoupled orbital angular momenta. This alternation can be traced to a phase in the electron-coupling algebra. Using the second-quantised factorisation of the interelectronic potential...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
In contrast to conventional semiconductors, two-dimensional transition metal dichalcogenide (TMD) monolayers allow both permanent as well as tunable control of their band structure. For instance, alloying or inducing strain during growth [1,2] can permanently alter their direct, energy-degenerate band gaps at the ±K valleys of the Brillouin zone. While this approach leads to substantial shifts...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
Altermagnetism is an emerging form of compensated magnetism that combines vanishing net magnetization with momentum-dependent spin polarization and spin splitting. While most studies to date have focused on electronic materials, recent advances in ultracold atomic gases offer new opportunities to realize and investigate altermagnetic physics in highly controllable quantum many-body...
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XiaJi LIUAIP | Quantum Science and Technology (QST)Poster
We systematically investigate the emergence of finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superconductivity in a square lattice Hubbard model with finite filling, driven by either dxy-wave or dx2−y2 -wave altermagnetic order in the presence of on-site s-wave attractive interactions. Our study combines mean-field calculation in the superconducting phase with pairing instability...
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Dr Kaih Mitchell (RPTU Kaiserslautern-Landau)AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
We present an atomtronic toolbox to study quantum transport phenomena and quantum scattering problems using Bose-Einstein condensates (BECs) in spatially and temporally modulated optical potentials. We have recently applied this apparatus to investigating atomic Josephson junctions.
Our platform can apply an arbitrary optical potential to a BEC, using a two-axis acousto-optical deflector...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
Actinium-225 (Ac-225) is emerging as one of the world's most important medical radioisotopes for Targeted Alpha Therapy (TAT), providing a highly effective treatment for a growing range of metastatic cancers. However, global production remains insufficient to meet rapidly increasing demand, and Australia currently has no sovereign production capability.
This presentation outlines the vision...
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Mr Lasse Sweetland (University of Sydney)AIP | Quantum Science and Technology (QST)Contributed Oral
In the global research effort to construct quantum devices, networked devices via distributed entanglement are emerging as a promising method of addressing the problem of scaling up quantum technologies. Rare-earth ions embedded in crystalline hosts are a leading hardware platform for implementing quantum networks, compatible with both microwave-domain quantum computers and the optical links...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Spectrographs used for exoplanet characterisation often rely on highly stable Fabry-Perot interferometers for real time calibration. Designers of Fabry-Perot calibration systems commonly use modified Airy functions to model changes to mirror coatings, surface irregularities, and other sources of phase shift to identify and characterise sources of mode drift. Physical calibration systems have...
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Anika Chan (Australian National University)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Space telescopes consisting of multiple formation flying satellites are of growing interest to the astronomical instrumentation community, since they enable effective telescope apertures beyond what is physically feasible on Earth. Recently, successful deployment of the GRACE mission laser-ranging instrument and technical
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developments for the LISA gravitational wave mission have demonstrated... -
Arghya Mukherjee (School of Computing Macquarie University)ANZOS | Quantum Computing and Quantum Information (ANZCOP QCQI)Contributed Oral
Differential privacy is the de-facto standard for privacy-preserving data analysis, and recently it has been extended to the quantum realm. We study how to answer counting queries on quantum-encoded datasets while preserving privacy. A counting query asks for the fraction of records satisfying a Boolean predicate, such as '*How many people in the dataset are students and within the age...
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AIP | Quantum Science and Technology (QST)Contributed Oral
One-dimensional Bose gases with repulsive contact interactions provide a paradigmatic example of an integrable quantum many-body system. Realized experimentally with ultracold atoms and described theoretically by the exactly solvable Lieb–Liniger model, they have become an important platform for studying non-equilibrium quantum dynamics.
Despite the exact solvability of the Lieb–Liniger...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesPoster
This study investigates the applications of electromagnetic wave theory in antenna design and radio frequency (RF) engineering for modern wireless communication systems. Electromagnetic waves play a vital role in wireless technologies including 5G/6G communication, satellite systems, radar, Internet of Things (IoT), and software-defined radio (SDR). The research analyzes how wave properties...
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AIP | Quantum Science and Technology (QST)Poster
Artificial crystals, formed by imposing spatially periodic potentials onto existing material platforms, provide a powerful route for designing and controlling electronic properties beyond those available in natural systems. Moiré superlattices in twisted two-dimensional (2D) materials have recently emerged as a prominent example, hosting correlated insulating states, superconductivity, and...
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Mikhail Patrashin (Adelaide University)AIP | Condensed Matter & Materials (CMM)Contributed Oral
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In this work we explore the possibilities of creating an artificially synthesised topological insulator (TI) with a flat-band quasiparticle spectrum for realising new emergent superconductivity physics, either in the form of the unconventional bulk superconductivity [1] or by interfacing the TI with a conventional superconductor. The TI is synthesised using an engineered semiconductor... -
AIP | Physics Education (PEG)Invited talk
Historically, most professional astronomers started with an undergraduate degree in physics, followed by a PhD on research in astronomy. However, gradually, due to student demand for a specialist astronomy degree, standalone astronomy degrees have sprung up. So the question arises: as a department, should we in Physics be teaching a stand-alone astronomy major? What should such degrees look...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Collisions between ultracold quantum gases provide a fertile ground for generating nonclassical correlations, entanglement, and momentum-space analogues of optical quantum states using massive particles. Such phenomena have been studied extensively in bosonic systems, in particular in collisions of metastable $^4$He$^\ast$ Bose--Einstein condensates. These studies led to some of the...
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Narise Williams (The University of Physics)
Accurate calculations of ionisation cross-sections are essential for constraining dark matter–electron interactions, neutrino scattering, and precision Standard Model and beyond-Standard Model (BSM) physics.
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We present a generalised framework for computing ionisation cross-sections for scattering and absorption processes, fully incorporating relativistic effects and avoiding the use of the... -
AIP | Condensed Matter & Materials (CMM)Contributed Oral
Maintaining the integrity of metal clusters is crucial to maintaining their unique, size-dependent properties but this is challenging as they tend to agglomerate when deposited onto a substrate. Coating metal clusters with a metal oxide layer is considered an effective approach to stabilise the clusters and prevent agglomeration. In the present work, phosphine-protected Au9 clusters deposited...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
Tantalum–germanium (Ta–Ge) alloys have recently emerged as a promising materials platform for superconducting
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quantum devices due to their compatibility with Ge-based semiconductor architectures
and demonstrated superconductivity. Understanding the atomic-scale structure and thermal stability of
these alloys is essential for developing high-quality superconductor–semiconductor... -
AIP | Quantum Science and Technology (QST)Poster
Quantum computers are rapidly approaching utility-scale operation, requiring not only high-fidelity qubit control but also scalable and reproducible fabrication. Silicon MOS spin qubits are a compelling platform to meet these requirements, offering compatibility with CMOS technology, a minimal footprint, and state-of-the-art gate fidelities [1]. However, cryogenic characterization is emerging...
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The velocity distribution of cold dark matter within galaxies is expected to exhibit ultra-fine-grained substructure as a result of the many foldings of an initially smooth phase-space sheet under gravity. The innumerable folds of this sheet in the inner regions of a galactic halo would appear on solar-system scales like an extremely large number of spatially overlapping streams of dark matter...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Polaritonic van der Waals metasurfaces provide a versatile platform for compact metaphotonic devices, including topological photonic circuitry, chiral light sources, and nonlinear optics. Their functionality relies on the coexistence of strong exciton-photon coupling, large oscillator strengths, deeply subwavelength thicknesses, and symmetry-controlled band topology. However, the design of...
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Mr Yuri Venturini (CAEN S.p.A.)AIP | Nuclear and Particle Physics (NUPP)Poster
Modern nuclear and particle physics experiments, medical imaging systems, and large-scale detector readouts demand ever-higher data throughput, driving the adoption of streaming readout (SRO) architectures alongside conventional triggered acquisition. This work presents a systematic performance evaluation of the CAEN Digitizer 2.0 family (x2740/x2745, x2730, and x2751), which combines...
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Navneet Krishnan (Australian National University)AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
Weakly-Interacting Massive Particles (WIMPs) remain one of the leading candidates for dark matter. One aspect of the search for such particles is direct detection, where terrestrial detectors aim to observe or constrain interactions between WIMPs and nuclei. This requires the application of a nuclear structure model in order to effectively predict the potential nuclear responses to WIMP...
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AIP | Solar Terrestrial and Space Physics (STSP)Contributed Oral
The plasma dynamics in near-Earth space are heavily influenced by the solar wind and associated interplanetary magnetic field (IMF). Physics-based models are widely used to investigate the dynamics of the ionosphere-thermosphere system and the response to solar wind forcing. Since the high latitude and polar regions are strongly coupled to interplanetary space, these regions act as a boundary...
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757. Beyond the Symmetric Beam-Splitter: Hong-Ou-Mandel Entropy from Frame Reconstruction TomographyMatthew ArmanascoAIP | Quantum Science and Technology (QST)Contributed Oral
Two-photon interference at a beam splitter is a foundational primitive in quantum optics, underpinning applications from precision metrology to photonic quantum computing. When two indistinguishable photons enter the input arms of a 50:50 (reflection:transmission) beam splitter, bosonic statistics dictate that they bunch and exit the same port, producing the Hong–Ou–Mandel (HOM) effect and...
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AIP | Atomic and Molecular Physics (ATMOP)Poster
Nitrogen-vacancy (NV) centres are emerging as a powerful platform for magnetic field sensing. However, the bias field required by most state-of-the-art NV vector magnetometers severely limits their deployable sensitivity beyond the ($\mathrm{nT/\sqrt{Hz}}$) range, as thermal and mechanical drifts of the bias field are indistinguishable from changes in the measured field. Furthermore, many...
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ANZOS | Photonics and Optics (ANZCOP)Poster
Airborne pathogen plays an essential role for environment monitoring, infectious-disease warning, and public health surveillance; however, direct and reliable detection in air remains challenging. Unlike liquid-phase samples, airborne biological particles are sparsely and stochastically deposited, making it difficult to generate a stable optical response. As a result, the light-matter...
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Transcranial Ultrasound Stimulation (TUS) provides a non-invasive method for modulating brain activity with spatial precision. It has application in treatment of neurological and psychological disease, for example depression, epilepsy and Parkinson’s, and for basic neuroscience research. Biophysical effects of TUS have not been fully quantified and physical mechanisms linking pressure and...
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Carlo Panu (Institute of Condensed Matter Theory and Solid State Optics, Friedrich-Schiller-Universitat Jena, Max-Wien-Platz 1, 07743 Jena, Germany 2Department of Quantum Science and Technology, Research School of Physics, The Australian National University, Canberra ACT 2601, Australia)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
The non-Hermitian skin effect is one of the most remarkable topological features of non-conservative physics. It causes a macroscopic accumulation of states at the boundaries of a confined system, opening new ways for controlling waves in photonic, mechanical, and other non-Hermitian systems. This effect has recently been observed in nonlinear bosonic experiments with Bose-Einstein condensates...
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Ryan Russell (The University of Sydney)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Optical frequency combs (OFCs) bridge the optical to the microwave (electronic) domain and enable frequency counting in optical atomic clocks (OACs) and low noise microwave synthesis, amongst other applications. Using the OFC directly for spectroscopy is challenging due to the low power per comb line (typically nanowatts to microwatts) and the narrow line spacing of fibre-based OFCs; this...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Brillouin dynamic gratings (BDGs) provide a versatile mechanism for realizing reconfigurable narrowband optical filtering through optoacoustic interactions. While BDGs have been extensively studied in optical fibres, systematic investigations in integrated photonic platforms remain limited. Here, we demonstrate strong BDGs in low-loss heterogeneous As$_2$S$_3$–Ge:SiO$_2$ waveguides and...
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Choon Kong Lai (University of Sydney)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Brillouin microwave photonic (MWP) filters harness stimulated Brillouin scattering to frequency-selectively manipulate the amplitude of microwave signals in the optical domain, realising either a passband or notch response. A high-performance Brillouin MWP filter requires a low-phase-noise laser, high-bandwidth modulators, a high-gain Brillouin nonlinear medium, and high-bandwidth...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
MicroRNAs (miRNAs) are extremely short noncoding RNA molecules which plays an important roles in many biological processes. Changes in miRNA expression are closely related to cancer and other diseases, making them useful biomarkers for molecular diagnosis. However, sensitive miRNA detection is still challenging because of their low abundance, short sequence length, and high similarity among...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
As global energy demands rise, fusion energy production poses the possibility of generating clean, decarbonized power to the grid. Magnetic-confinement tokamak fusion plasma devices like ITER in Europe or SPARC in the U.S. are currently under construction as energy-positive pathfinders to a full fusion power plant (called DEMO in Europe, ARC in the U.S.). To actually deliver electricity to...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
Amorphous carbon-based networks naturally occur in interstellar dust and are largely responsible for enriching the Earth with the elements of life in the form of carbonaceous chondrite meteorites. Complex organic molecules containing oxygen and nitrogen have also been detected in extraterrestrial carbon networks including in carbon-rich asteroids, Bennu and Ryugu. Carbon networks are heavily...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
The integration of foundation models in particle physics is gaining pace rapidly and has expanded the search for new physics. This talk presents foundation models trained on low-level data from the first fully simulated dataset using Open Data Detector (ColliderML), to distinguish between Standard Model and Beyond Standard Model processes. We compare new physics discovery using only low level...
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Nathan Falkner (University of Technology Sydney)ANZOS | Photonics and Optics (ANZCOP)Poster
Brillouin Microscopy is a contactless optical technique of measuring visco-elastic properties in a broad range of materials. Since the adoption of the Virtually-Imaged Phase Array (VIPA) spectrometer in the 2000s, Brillouin Microscopy applications have expanded into biological research and imaging living matter. Modern day Brillouin Microscopy systems commonly employ VIPA spectrometers with...
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AIP | General Relativity and Gravitation (ASGRG)Contributed Oral
After two black holes merge, the final black hole emits a ringdown signal composed of quasi-normal modes whose frequencies and decay times are set by its mass and spin. Measuring these modes tests general relativity in the strong-field regime, as the theory predicts a specific relationship between them.
Such tests rely on calibration, the conversion of the detector's raw output into...
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AIP | Astronomy (ASTRO)Invited talk
Coronal Mass Ejections are predicted to play an important role in planetary atmospheric erosion, especially for planets that are close to their host star. However, this conclusion remains controversial because, despite decades of searches, there has not been an unambiguous detection of a CME from a star beyond our Sun. A clear signature of a CME is a type II radio burst, which is emitted from...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Metallic surfaces can support charge density waves, quasi-particles known as surface plasmon polaritons (SPPs). When the physical extent of the metal is in the nanoscale regime, i.e., < 100 nm, the SPPs are physically confined and nanoparticle supports collective oscillations known as localized surface plasmon resonances (LSPRs). Such nanostructures can localize and manipulate electromagnetic...
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AIP | Astronomy (ASTRO)Contributed Oral
Over the past decades, spatially resolved spectroscopic studies have confirmed that galaxies come in two broad dynamical families: fast vs. slow rotators. Slow rotators are on average older, more likely to have higher stellar masses and typically found in denser environments. With age and stellar mass being the strongest predictors of galaxy spin, the diminishing influence of environment has...
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AIP | Quantum Science and Technology (QST)Poster
It is well-established that measurements on spatially separated qubits exhibit correlations that violate statistical limitations arising from local realism. These limitations are mathematically expressed by Bell-type inequalities. A violation of a Bell-type inequality is referred to as Bell nonlocality. In 2002, Collins, Gisin, Linden, Massar and Popescu (CGLMP) developed a generalisation of...
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Jayden Webster (Quantum and Advanced Technologies Research Institute, Griffith University, Yuggera Country, Brisbane, QLD 4111, Australia)AIP | Quantum Science and Technology (QST)Contributed Oral
Photons have proven themselves to be an excellent choice for carrying quantum information. Storing information in the arrival time of photons, i.e. time-bin encoding, naturally enables the creation of high-dimensional states that are information dense and robust against noise. By coupling high-dimension time-bin encoding with entanglement, we can extend the application of these states into the...
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AIP | Physics Education (PEG)Contributed Oral
Research work is often difficult, and often involves significant levels of creativity and novel problem-solving. These levels of difficulty, creativity, and novelty can be difficult to incorporate into traditional exam-type assessment tasks. Project-oriented courses are generally far better suited for learning and evaluating the learning of these skills. Thus, honours projects and one- or...
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Photomultiplier Tubes (PMTs) are central to the SABRE South experiment’s
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ability to detect rare, low-energy events, such as potential dark matter interac-
tions in ultra-pure NaI(Tl) crystals. To correctly interpret what the detector
sees, we need simulations that faithfully reproduce how our PMTs respond to
real signals. This work presents the comparison of the simulated PMT wave-
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Benjamin Field (University of Sydney)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
While traditionally developed for astronomy use cases, photonic lanterns are finding use in a wider range of fields, leveraging their spatial mode demultiplexing (SPADE) capabilities.
We explore the use of mode-selective lanterns as the SPADE receiver for the displacement sensing of levitated nanoparticles [1]. When collecting the scattered light from a trapped particle, it has been shown...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
HgCdTe remains the leading material system for high performance infrared detection across the infrared spectral bands. However, its full potential is limited by current substrate technologies, particularly CdZnTe (CZT), which, although lattice matched, is expensive, available only in small sizes and difficult to produce. These constraints restrict device architectures, impede the development...
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Fenglin Zhuo (CSIRO, UNSW Sydney)ANZOS | Photonics and Optics (ANZCOP)Poster
The growth of clean technologies has resulted in an increased demand for critical minerals including rare earth elements (REEs). To address this demand, there has been growing need for the development of new techniques to accelerate the discovery, extraction, and processing of REEs from more easily extracted lower-grade ore deposits. A well-established technique used for element identification...
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ANZOS | Quantum Computing and Quantum Information (ANZCOP QCQI)Poster
Single photon detection at near infrared (NIR) wavelengths has become an important aspect for photon based quantum technologies, with applications in quantum communication and information processing. With regards to detector devices, Superconducting Nanowire Single Photon Detectors (SNSPDs) remain the most promising when compared to alternatives such as single photon avalanche photodiodes....
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
The strong interaction binds quarks together to form hadrons such as the proton and neutron, as well as heavier states containing strange or charm quarks. Charm baryon spectroscopy has seen renewed interest following LHCb’s 2026 observations confirming the doubly charmed $\Xi_{cc}^+$ mass and making the first-ever observation of the $\Omega_{cc}^+$, completing the SU(4) multiplet of...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Magnetic-field sensors are important for applications including biomagnetic measurements, navigation, geophysical surveying, and communications in electromagnetically challenging environments. On-chip optomechanical magnetometers provide a route towards compact, room-temperature, deployable sensors by combining magnetically responsive mechanical elements with precise optical readout.
Recent...
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Sean Hodgman (The Australian National University)AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
The Bell test framework provides one of the clearest and most rigorous demonstrations of quantum nonlocality. While Bell non-locality tests have been extensively demonstrated with photons, experimental realisations with massive particles have been explored significantly less, due to the challenges with generating, manipulating, and independently measuring entangled matter-wave states. In this...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesPoster
The rapid advancement of integrated vacuum electronic systems is creating demand for electron sources that combine compactness, stability, and precise emission control while operating at low power. While conventional field emitters based on materials such as Si, Mo, W, LaB6, and carbon nanotubes (CNTs) have demonstrated emission capabilities, their vertical architecture and high-voltage...
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ANZOS | Quantum Computing and Quantum Information (ANZCOP QCQI)Poster
The Binary Paint Shop Problem (BPSP) is a well-known $\mathsf{APX}$-hard optimisation problem with important applications in automotive manufacturing. Given a sequence of $2n$ cars, where each of $n$ car types appears exactly twice, the goal is to assign two colours so that each car type receives both colours while minimising consecutive colour changes. Performance is measured by the paint...
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AIP | General Relativity and Gravitation (ASGRG)Contributed Oral
Whether gravity must be quantized remains one of the biggest open problems in fundamental physics. Classical-quantum hybrid theories have recently attracted attention as a possible framework in which gravity is treated classically yet interacts consistently with quantum matter. Schemes based on completely positive dynamics satisfy most formal consistency requirements and enable a systematic...
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Sukhmandeep Singh Baath (School of Mathematics and Physics, The University of Queensland, QLD 4072, Australia)AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum thermodynamics asks whether the laws of thermodynamics are modified, enriched, or fundamentally constrained by quantum mechanics. A central question is whether uniquely quantum features — such as coherence, superposition, and noncommutativity — can provide thermodynamic advantages over classical systems, or whether such advantages ultimately admit classical explanations.
This work...
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AIP | Quantum Science and Technology (QST)Poster
Quantum batteries offer the prospect of achieving charging advantages beyond those attainable in classical or independently charged systems by exploiting quantum resources for energy storage. In particular, collective charging can enhance the charging power relative to the parallel charging of individual cells, with quantitative bounds and scaling laws established in many-body battery models....
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Kaitlin Cook (Australian National University)AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
Experimental measurements of nuclear fusion have long indicated a fundamental problem with theoretical models of fusion. Measured capture cross-sections for heavy-ion collisions at energies well above and well below the barrier are systematically smaller than model calculations. This may have a dynamical origin: exchange of nucleons and the loss of kinetic energy outside the barrier...
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Lewis Hill (Max Planck Institute for the Science of Light)ANZOS | Photonics and Optics (ANZCOP)Poster
Spontaneous symmetry breaking (SSB) is a ubiquitous physical phenomenon in which a symmetric system abruptly evolves into an asymmetric state under infinitesimal perturbations. In nonlinear photonics, Kerr-mediated SSB has previously been demonstrated between counterpropagating modes in microresonators and between orthogonal polarization modes [1,2].
Here, we experimentally demonstrate...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
The localized dose-deposition of particles such as protons provides advantages over conventional radiotherapy via X-rays for the treatment of cancer. To reach tumor layers at different depths within the patient body, the beam energy needs to be varied. The efficiency of delivery systems for particle therapy is limited by the energy layer switching time. This is the time required to ramp the...
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AIP | Physics Education (PEG)Poster
Identifying students at risk of academic failure early in the semester is critical for timely intervention. Previous work in physics education has shown that institutional variables such as cumulative GPA are critical for early prediction, with in-class variables becoming important only after the first examination [1], and that tuning the model was required to achieve better performance when...
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Carolyn Wood (The University of Queensland)AIP | Theoretical Physics (TPG)Contributed Oral
Particle detector models are powerful tools for probing different quantum fields or spacetimes. The dominant model, the Unruh–DeWitt (UDW) detector, describes a pointlike particle interacting with a quantum field along a classical trajectory, with only the particle’s internal state treated as a quantum degree of freedom.Recent studies have moved to include more realistic quantum effects,...
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AIP | Quantum Science and Technology (QST)Poster
Qudits are the higher-dimensional version of the two-level qubits. Measuring a qudit results into any of $d$ orthogonal states, thereby providing a larger Hilbert space with increased information capacity for computation and communication applications. One natural route to encoding high-dimensional quantum information is through the transverse spatial structure of light, with each basis state...
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AIP | Nuclear and Particle Physics (NUPP)Poster
The safe operation of nuclear power plants (NPPs) is governed by stringent national and international regulations established by organizations such as the International Atomic Energy Agency (IAEA), the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR), and the International Commission on Radiological Protection (ICRP). Despite significant advancements in reactor...
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AIP | Condensed Matter & Materials (CMM)Poster
The question of mineralisation is pertinent in many fields. In particular, the nucleation of calcium phosphates is significant to studies of biomineralization and orthopaedics to, recently, the development of protective coatings for marble cultural heritage objects. In the latter instance, it has been shown that small amounts of organic solvent (ethanol, isopropanol, or acetone) aid in...
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180. Computationally Tractable Prediction of Impact Ionization for Semiconductor Materials DiscoveryCOMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Impact ionization plays a central role in avalanche multiplication, electrical breakdown and high-field carrier transport in semiconductor devices. However, accurate prediction of impact-ionization behaviour typically requires computationally intensive first-principles calculations involving wavefunction overlap integrals, dielectric screening and high-dimensional Brillouin-zone integrations....
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
We theoretically investigate pair correlations of spinless fermions in an extended Hubbard chain with attractive nearest neighbor and dipolar interactions. We predict a quantum phase transition between a phase-separated (or droplet) phase and a quasicondensate of $p$-wave Cooper pairs and calculate the critical value of the interaction strength and exponent of quasi-long range order. For the...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum tomography and quantum retrodiction are traditionally viewed as separate inference tasks: tomography reconstructs quantum states from measurement data, whereas retrodiction infers past quantum states from observed outcomes. We show that the two are manifestations of the same underlying principle. We prove that the Petz recovery map associated with a measurement channel is precisely the...
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AIP | General Relativity and Gravitation (ASGRG)Contributed Oral
In general relativity, the dynamics of spinning particles is governed by the Mathisson–Papapetrou–Dixon equations, which are most commonly applied to massive bodies, but the framework also works in the massless case. Such massless versions naturally arise, for example, in the description of energy centroids of high-frequency wave packets. In this work, we consider massless spinning particles...
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William Searle (Monash University)
Gravitational waves (GWs) from first-order cosmological phase transitions provide a powerful probe of physics beyond the Standard Model, and upcoming space-based GW observatories necessitate greater precision in theoretical predictions for these signals. In this work, we present a systematic framework for consistently predicting the GW spectra for such transitions.
We first outline the...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum linear system solvers are a central primitive in quantum algorithms, with applications ranging from differential equations to optimization, machine learning, and scientific computing. Several recent algorithms achieve the same optimal asymptotic query complexity, scaling as $O(\kappa \log(1/\epsilon))$, where $\kappa$ is the condition number and $\epsilon$ is the target precision....
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Cameron West (The University of Queensland)AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Electron-electron interactions beyond the Standard Model are promising candidates for dark matter and new sources of parity violation. We present a general procedure for extracting new bounds on coupling strengths with atomic structure calculations and do so for certain parity-odd cases. Our approach includes dominant many-body effects and is valid for any parity or mediator mass. Constraints...
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Josephine Dias (University of Queensland)AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum key distribution (CVQKD) enables the distribution of provably secure keys for cryptography by exploiting fundamental principles of quantum mechanics. QKD protocols can be broadly classified as either discrete-variable QKD, encoding information in discrete quantum states, or continuous-variable (CV) QKD, which encodes information in the continuous amplitude and phase quadratures and...
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AIP | Quantum Science and Technology (QST)Contributed Oral
While learning theory provides a framework for inferring unknown models from data, quantum inference tasks, such as state discrimination and parameter estimation, face unique constraints imposed by statistical limits and the fundamental laws of quantum mechanics. A central challenge is determining how efficiently information can be extracted from limited quantum resources.
In this work, we...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
External injection into mode-locked laser using continuous-wave (CW) or coherent pulsed lasers has become one of the most widely adopted approaches for generating phase-locked optical pulses. Existing techniques typically rely on injecting CW beams close to the central frequency of the mode-locked pulses. The resulted phase-locking is generally limited to the local spectral components of the...
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Dr Corey Plowman (Curtin University)AIP | Atomic and Molecular Physics (ATMOP)Poster
We have applied a semiclassical impact-parameter close-coupling method to calculate the state-resolved excitation cross sections in proton collisions with the ground state of helium. Using both correlation-configuration and frozen-core two-electron basis functions, we construct a large number of helium pseudostates to use in the expansion of the total scattering wave function. Extensive...
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AIP | Atomic and Molecular Physics (ATMOP)Poster
Accurate atomic data for boron II ($\text{B}^{+}$) is essential for plasma modelling. In particular, there is currently a strong focus on using plasma modelling to interpret recent experiments on solid boron injection (SBI), a promising real-time alternative to conventional glow-discharge boronisation (GDB). In this work, we present a converged dataset of electron-impact excitation and...
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ANZOS | Photonics and Optics (ANZCOP)Poster
Corresponding Author: Bo Fu (email: fubo10@buaa.edu.cn)
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The conversion between mode-locking (ML) and Q-switching (QS) in a pulsed fiber laser is highly desirable for extending the parameter range of lasers and avoiding unwanted regime transitions [1]. However, such controllable conversion has rarely been achieved in the 2‑μm band, especially in fiber lasers based on real saturable absorbers... -
AIP | Physics Education (PEG)Contributed Oral
Informal learning and outreach has been approached via an exhibition of 30 pieces of physics-inspired jewellery, tableware and decorative objects. Displayed in a public university physics setting, these unexpected objects attract attention. They invite curiosity and conversation in ways that conventional communications from physicists often don’t. Each piece starts with a spark - a relic of an...
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Cosmic-ray muons are produced in the atmosphere, and their flux at ground level depends on atmospheric conditions such as temperature and pressure. This makes ground-level muon measurements a potential source of information about the state of the atmosphere, presenting a unique opportunity for improvements to weather forecasting.
Simulation work by collaborators William Luszczak and Joseph...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Cosmic rays and environmental ionizing radiation are emerging as important error mechanisms in quantum technologies, particularly in superconducting circuits where particle-induced quasiparticles, phonons, and correlated relaxation events can produce non-local faults. Similar impulsive energy-deposition processes may also perturb precision oscillators, resonators, and timing systems used for...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
Nanoporous electrically conductive carbons filled with aqueous electrolytes are of interest as systems for electrochemical energy harvesting and conversion. A key process is the formation of the electrical double layer under strong confinement during spontaneous liquid infiltration into the pore network. In contrast to supercapacitors, where charge accumulation is driven by an externally...
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AIP | Quantum Science and Technology (QST)Contributed Oral
The discovery of nuclear electric resonance in a single 123Sb nucleus in silicon [1] was accompanied by a detailed, quantitative understanding of the coupling between the nuclear quadrupole moment and lattice strain. With this knowledge, it is possible to design an experiment where the nuclear spin is coherently controlled using a resonant acoustic drive, i.e. nuclear acoustic resonance (NAR)...
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Thomas Harris (Monash University (AU))AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
The study of $CP$ violation is vital in unlocking new insights into the observed dominance of matter over antimatter in our universe. Electroweak penguin decays like $\bar{B}^0 \rightarrow \bar{K}^{*0} \mu^+\mu^-$ are of particular importance in this pursuit, as they are highly sensitive to $CP$ violation and/or new physics effects. To this end we performed a search for $CP$ violation in the...
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Mason Clarke (the University of Queensland)AIP | Quantum Science and Technology (QST)Contributed Oral
Edge states are excitations in many-body systems that are spatially localised at the boundary. They exhibit desirable properties such as dissipationless transport and robustness against disorder. These features stem from a topological origin, and are central to phenomena like the quantum Hall effect and topological insulators.
In a rotating planar Bose–Einstein condensates (BECs), the...
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Branko KovacAIP | General Relativity and Gravitation (ASGRG)Poster
Analysis of forces in mass dynamics shows that the inertial force satisfies the principle of action and reaction in every experiment on Earth. The concept that inertial force arises from the interaction of mass and space (either absolute, inertial or spacetime) doesn’t incorporate the action-reaction principle. Einstein also recognised the fact that the lack of a reaction to the inertial force...
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AIP | Quantum Science and Technology (QST)Poster
Crosstalk noise derives from phenomena in quantum devices which inhibit individual addressability or cause unintended interactions among qubits. It is widely considered one of the major problems to be solved for a quantum computing platform to operate at scales beyond one or two qubits. Despite this, detailed discussion of crosstalk is often neglected when quantum device performance is...
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AIP | Quantum Science and Technology (QST)Poster
Experiments with semiconductor quantum devices require thoughtfully crafted electronic hardware which suits the strenuous demands on signal integrity from DC to millimeter-wave frequencies.
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Here, we present a cryogenic-compatible, non-magnetic printed circuit board (PCB) design to interface between semiconductor quantum devices and their classical control electronics. This PCB delivers 32... -
Li Hong Liu (The University of Sydney)AIP | Condensed Matter & Materials (CMM)Contributed Oral
Quantum networks are an important part of the future infrastructure that will allow transmission of quantum information between quantum computers. There are many promising hardware platforms for realising quantum networks including light-matter interactions in atomic systems (Kimble, Nature, 453, 2008) or solid-state systems (Chou et al, Nature, 561, 2018). Trivalent rare-earths embedded in...
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Nick Tothill (Western Sydney University)AIP | Astronomy (ASTRO)Contributed Oral
Blazar flares present as increased brightness of the jet from an Active Galactic Nucleus across the electromagnetic spectrum; they also display changes in polarisation fraction and direction. The Cherenkov Telescope Array (CTA) is a far more sensitive detector of gamma-ray blazar flares than previous instruments, and is already detecting them in the northern sky. CTA covers the whole sky from...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Fractional derivatives, and particularly fractional Laplacian operators, have been studied intensively in physics, mathematics and engineering [1]. In optics, such operators offer a route to generalize the conventional nonlinear Schrödinger equation by replacing the usual quadratic dispersion with a fractional dispersion law. The fractional Laplacian operator is written as...
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AIP | Nuclear and Particle Physics (NUPP)Invited talk
The study of rare particle interactions is fertile ground in the search for beyond-Standard-Model physics. Experimental searches of this nature are extremely challenging, typically operating for years to measure a very small sample of signal events. It is therefore imperative to employ detection technologies that extract as much information as possible, to maximise the scientific value of the...
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Daniel Marcantonio (University of Melbourne)AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
The Belle II experiment at the SuperKEKB collider provides a unique environment for probing physics beyond the Standard Model through both direct dark sector searches and precision tests of lepton flavour universality (LFU). We present recent results on searches for light dark sector mediators, exploiting Belle II's clean collision environment, hermetic detector and dedicated low-multiplicity...
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Prof. Matthew Davis (University of Queensland)AIP | Quantum Science and Technology (QST)Contributed Oral
Novel nonequilibrium states of superfluids can be engineered by the controlled application of dissipation. In this work we show that a Bose–Hubbard model with local loss exhibits a first-order dark-state phase transition between a dark soliton and a uniform superfluid. Semiclassical simulations and stability analysis reveal that the soliton acts as a many‑body dark state, whose suppressed...
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AIP | Solar Terrestrial and Space Physics (STSP)Contributed Oral
Solar eruptions (flares and coronal mass ejections) play a central role in shaping space weather, making their accurate prediction and modelling an imperative. These violent magnetic explosions release enormous amounts of energy and can drive solar storms travelling at hundreds of kilometres per second, capable of delivering severe geomagnetic disruptions. The source of this energy lies in...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
The force experienced by a spin in a magnetic field gradient underlies many proposals for hybrid quantum systems. These include schemes for mechanically mediated quantum gates, spin squeezing, searches for exotic forces, and motional superpositions for probing the interface between quantum and gravity. Yet, experimentally observing this spin-force for anything larger than atomic scales has...
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AIP | Physics Education (PEG)Contributed Oral
Solar cells and LEDs can be used to demonstrate quantum phenomena by their apparent bandgap in both the detection and production of light. The bandgap and the wavelength of emitted light can be used to calculate Planck’s constant. As part of Quantum Enrichment days (sponsored by an IYQ grant$^1$ from the AIP) a circuit was developed to allow both the measurement of Planck’s constant and...
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James Stuart (Australian National University)AIP | Quantum Science and Technology (QST)Contributed Oral
Erbium-doped solid-state crystals have emerged as a promising platform for quantum memories in quantum networks and quantum technologies, due to the telecom compatible 1.5 µm transition. In recent years, excellent performance has been achieved in these systems: efficiencies up to 80%, storage of 70 temporal modes [1], and hyperfine coherence times of 3 seconds in a bulk crystal [2]. However,...
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AIP | Nuclear and Particle Physics (NUPP)Poster
The SABRE South experiment, located at the Stawell Underground Physics Laboratory (SUPL) in Stawell, Victoria, is an ultra-low background dark matter detection experiment designed to test the long-standing annual modulation signal reported by DAMA/LIBRA. The SABRE South detector will be comprised of several subsystems, including an active veto system used for background rejection, containing...
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Dr Eromanga Adermann (CSIRO)AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum machine learning (QML) has the potential to revolutionise artificial intelligence, but its realisation is limited by the fragility of Noisy Intermediate Scale Quantum (NISQ) devices. Although quantum error correction (QEC) is expected to enable fault-tolerant QML, its substantial qubit overhead motivates the search for alternative strategies suitable for near-term hardware.
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Ms Nandana Thuranalloor RaveendranathAIP | Quantum Science and Technology (QST)Contributed Oral
Quantum nonlocal correlations—encompassing Bell nonlocality and quantum steering—beyond their foundational role, act as a cornerstone for device-independent (DI) applications such as DI quantum key distribution, randomness generation, and more. To ensure the integrity of these protocols, nonlocal correlations must first be rigorously verified using a nonlocality test. This test typically...
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Nikhil Niranjan Maka (University of New South Wales)AIP | Quantum Science and Technology (QST)Poster
High-nuclear-spin group-V donors in isotopically enriched 28-Si offer access to a higher-dimensional Hilbert space and long coherence times for quantum information processing.
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Ion implantation provides a reliable method for introducing donors into enriched Si. To date, donor spin-qubit devices have typically been fabricated using timed implants through exposed mask windows, resulting in... -
Kundan Kawdu Surse (School of Physics, UNSW Sydney)AIP | Condensed Matter & Materials (CMM)Contributed Oral
Levitating electrons on solid neon form an emerging qubit platform in which the active electron is confined primarily in vacuum above an ultraclean, weakly polarizable, and predominantly nuclear-spin-free dielectric, enabling strong microwave control with reduced material noise. But electrons loaded from an emitter may localize in unintended potential minima generated by electrode gaps, etched...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Recent spaceflight missions such as NASA's Artemis program have heralded a renewed interest in lunar scientific research and exploration. To facilitate these activities, near-future lunar missions will require several times more bandwidth than is currently provided by traditional radio frequency (RF) communications. Free space optical communications (FSOC) presents itself as a viable...
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AIP | Physics Education (PEG)Contributed Oral
The quantum concepts behind modern quantum technologies are rarely introduced before senior high school. The quantum reality of the probabilistic nature of photons and all microscopic processes conflicts with the Newtonian concepts common in early education. As a result, most people remain unaware of the powerful understanding provided by quantum physics. Here we describe a classroom approach...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
Superconducting RF cavities operating in magnetic fields require low loss surface coatings that maintain high performance under cryogenic conditions. These systems are relevant to a range of applications, including accelerator technology, quantum devices, and axion dark matter searches. A key challenge is the development of reliable fabrication routes and a consistent evaluation framework for...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
Coherent muon to electron conversion is a charged lepton flavour violating process that provides an exceptionally clear signature for new physics searches beyond the Standard Model. The COMET experiment at J-PARC in Tōkai, Japan, will search for this transition with a world leading single event sensitivity of $3×10^{−15}$ in Phase-I, scaling to $1×10^{−17}$ for Phase-II. The experiment...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesPoster
Electric field induced second harmonic generation (EFISHG) is a powerful technique for investigating symmetry breaking in materials since it exclusively occurs in non-centrosymmetric media$^1$. This makes it a useful tool for probing charges at semiconductor interfaces, for example at silicon/dielectric boundaries$^2$ and in 2D materials$^3$. Similarly EFISHG is also effective at detecting...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Superconducting Nanowire Single Photon Detectors (SNSPDs) are ultra-sensitive telecommunication-wavelength photodetectors that function on changes in resistance of superconducting nanowires upon photon absorption. SNSPDs are widely considered to be the most sensitive photon detectors available, achieving near unity efficiency including at the telecommunication wavelength of 1550 nm, with...
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AIP | Atomic and Molecular Physics (ATMOP)Invited talk
The relativistic Fock-space coupled cluster (FS-RCC) method is among the most powerful and elegant multireference tools for the ab initio treatment of open-shell heavy element systems. Yet in its standard valence-universal form, it is largely confined to low Fock-space sectors, and its reach into genuinely multivalence, quasi-degenerate structures is limited by intruder states, and by the...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Superconducting quantum processors have been established to explore quantum physics [1] and some made accessible to the general public [2]. However, their operation of this large-scale quantum processor prevents the users from full control (e.g. pulse-level control of the processors). Furthermore, their queuing system and charging plan [3] make it difficult to run experiment that requires long...
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AIP | Quantum Science and Technology (QST)Contributed Oral
In this talk, I will give an overview of the latest published and unpublished results of my group on non-Markovian noise in superconducting qubits. Non-Markovian noise arises from unwanted interactions of our qubits with their environment. During a quantum circuit, these interactions causes errors at each step of the circuit. These errors can be correlated, resulting in non-Markovian (or...
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AIP | Condensed Matter & Materials (CMM)Poster
Nanoscale vacuum channel devices (NVCDs) enable electrons to travel across a nanoscale vacuum gap with minimal scattering, allowing faster electron transport than conventional solid-state devices. The absence of a solid conduction channel also provides improved tolerance to radiation, high temperatures, and harsh operating environments, making NVCDs promising candidates for next-generation...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
This talk will cover recent developments in "ensemblisation" - in which fundamental theory is used to extend formal and practical density functional theory (DFT) to excited states and finite temperatures. The talk will focus on key theory results, but will also discuss practical advances enabled therefrom that improve simulation of excited states and open quantum systems. It will introduce...
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AIP | Astronomy (ASTRO)Contributed Oral
Astronomical radio interferometers achieve exquisite angular resolution by cross-correlating signals from a cosmic source simultaneously observed by distant pairs of antennas to produce a Fourier-type measurement called a visibility. Here we describe the implementation of a feed-forward modeling approach to synthesize scientific images from interferometric visibility datasets, built using the...
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AIP | Astronomy (ASTRO)Contributed Oral
Deep learning is underpinned by software allowing efficient calculation of exact derivatives. Writing physics simulations in frameworks for this, like Jax or PyTorch, allows for revolutionary new capabilities: optimization and inference in extremely high dimensions. With our dLux Fresnel-optics code, we can fit optical models jointly with neural networks to the James Webb and Hubble Space...
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Sheon Chua (Australian National University)AIP | General Relativity and Gravitation (ASGRG)Poster
Ground based gravitational-wave detectors, such as Advanced LIGO [1], Advanced Virgo [2] and KAGRA [3], use active seismic isolation to reduce optical platform motion. However, inter-platform motion presents a significant noise challenge to the low frequency sensitivity of these instruments. To achieve future sensitivity targets, suspension platform interferometry (SPI) [4] provides a...
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Jacob Bos (The Australian National University)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
The ability to control two lasers at different wavelengths such that their relative frequency difference remains consistent is a desirable trait for continuous variable and twin-field quantum key distribution systems, and stable terahertz signal generation through photomixing. A standard approach for this is to use an optical frequency comb, which provides a phase stable optical reference...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Colour centres in silicon are an emerging platform for quantum information technologies. They can emit into low-loss optical telecommunication bands and leverage advanced silicon nanofabrication for photonics and microelectronics. Of these, the silicon T centre, emitting in the O-band, is the most advanced. We integrate single T centres into optical nanocavities with lateral diodes to realize...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
Efficient microwave-to-optical transduction is a requirement for long-range networks between quantum devices such as sensors and many quantum computers. Achieving the optical nonlinearities required for transduction can be realised with a three-wave mixing process with near-resonant collective enhancement in a concentrated salt with narrow linewidths[1]. Stoichiometric erbium lithium...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Much of the critical infrastructure of the modern world relies on timing signals disseminated by Positioning, Navigation and Timing (PNT) networks. At the heart of these networks are portable atomic clocks, forming the essential link between high-performance laboratory clocks for testing fundamental physics and field-deployable devices for real-world applications, including aboard PNT...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
We propose a new class of chiral quasi-bound states in the continuum (q-BICs) operating at large oblique angles, overcoming the conventional limitation of near-Γ, normal-incidence resonances. The approach exploits the enhanced radiative density of states near the light cone to realize high-Q resonances with nearly pure circular polarization in momentum regions approaching grazing emission....
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407. Discriminating Four-Top Production with Recursive Jigsaw Reconstruction at the ATLAS ExperimentAIP | Nuclear and Particle Physics (NUPP)Contributed Oral
The simultaneous production of four top-quarks (four-top) is a rare physics process predicted by the Standard Model, suspected to be sensitive to Beyond Standard Model (BSM) effects. If these BSM contributions were to exist, their effects would manifest in the form of an amplified cross section and enhanced yield of four-top, and in [2021][1] and [2023][2], four-top excess was repeatedly...
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AIP | Condensed Matter & Materials (CMM)Poster
Lower-dimensional chiral perovskites have emerged as promising materials for next-generation spintronic devices because of their strong excitonic and chiroptical responses. Particularly, 1D perovskites exhibit enhanced circular dichroism (CD) compared with their 2D counterparts due to the larger structural distortions induced by chiral organic cations.
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In this talk, we demonstrate 1D... -
ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Polarimetric imaging reveals optical information inaccessible to conventional intensity-only imaging by resolving the polarization state of light, thereby providing an additional degree of freedom for advanced imaging and sensing. However, conventional polarimetric imaging systems typically require time-sequential acquisition [1] or cascaded bulk optical components [2], limiting their...
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Pasquale ScarlinoANZOS | Photonics and Optics (ANZCOP)Contributed Oral
We report parametrically activated coupling between surface-acoustic-wave (SAW) phonon modes, mediated by their mutual interaction with a flux-tunable superconducting SQUID array resonator. This work builds on the multimode platform employed in [1]. Exploiting the in-situ flux tunability of the array, we pump the SQUID array resonator at the frequency difference of two selected acoustic modes,...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Voting protocols using entangled quantum states as ballots have been proposed as a solution to the problem of information-theoretically secure and private voting, something which is thus far unobtainable through classical schemes alone. However, quantum voting protocols are frequently impractically complex, resource-intensive and have poor robustness to noise, loss, or adversarial behaviour....
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AIP | Astronomy (ASTRO)Contributed Oral
Black hole jets have shaped our Universe. These relativistic jets (known as Active Galactic Nuclei [AGN]) heat and transport gas in their host galaxy and are a fundamental component of galaxy evolution. Despite their importance, understanding the energetics and environments of these extreme objects remains difficult. This is due, in part, to the requirement of overlapping, high resolution...
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AIP | Quantum Science and Technology (QST)Poster
Using electrically detected magnetic resonance (EDMR) spectroscopy we have investigated donor spin ensembles in isotopically enriched silicon, using both conventional chemical vapour deposition methods and an ion beam enrichment method compatible with conventional ion implanters [1,2]. The EDMR technique reveals details about the existence and local environment of donors in semiconductor...
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Jacob Dalgleish (Adelaide University)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Nitrogen-vacancy (NV) centres in diamond are prominent quantum defects that have attracted significant interest for sensing applications, particularly room-temperature magnetometry. Their optical and spin properties, with excitation at ~532 nm and emission spanning 600–800 nm, make them well suited for integration into optical systems. Embedding NV-diamonds within optical fibres enables...
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AIP | Solar Terrestrial and Space Physics (STSP)Poster
The first results of a new method for examining polar mesospheric summer echoes (PMSE) using a novel analysis of wide-beam radar observations is presented. PMSE occur when the region around the mesopause reaches temperatures below the sublimation point of water ice. In a phenomenon related to polar mesospheric clouds (PMC), this can produce strong radar echoes at VHF frequencies.
An...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Complex-frequency excitation provides a powerful tool for controlling resonant scattering by tailoring not only the carrier frequency but also the temporal growth or decay rate of the incident waveform. In this work, we investigate complex-frequency excitations in dielectric metasurfaces that support quasi-bound states in the continuum (quasi-BIC). Instead of relying solely on conventional...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Electric dipole moments (EDMs) are sensitive probes of fundamental symmetries and central to searches for physics beyond the Standard-Model. We present a symmetry-based, Zeeman-analogue operator framework that places magnetic and electric dipole physics on parallel footing under electromagnetic duality, and introduce a polar-sector pseudo-angular-momentum degree of freedom in parity space...
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Chathura Bandutunga (Australian National University)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Squeezed states of light are an established resource for continuous variable quantum enhanced precision measurements, with frequency nondegenerate (two mode) squeezed states being particularly relevant for quantum communication and sensing [1]. These states are conventionally generated using optical cavity based optical parametric oscillators, where the entangled sideband pairs are generated...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
We present an improved continuous phase-shifting digital holography method for micro-object imaging based on a dual-reference configuration. The proposed technique extends continuous phase-shifting holography [1] and follows the general Fourier-transform spectrometry principle underlying hyperspectral holography [2].
In the proposed scheme, a diffraction grating generates two first...
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208. Dynamic optical transfer functions for computational neuromorphic imaging and their applicationANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Event cameras report pixel-level log-intensity threshold crossings asynchronously, offering benefits in dynamic range, sensing latency, and data bandwidth. The conventional trade-off between sensing frequency and signal intensity is replaced by balancing contrast thresholds and temporal filtering, opening new possibilities for dynamic applications.
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Computational optical imaging has long... -
Jacky Luo (The University of Sydney)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Photon addition and subtraction are essential non-Gaussian processes in quantum optics, where conventional methods rely on the use of linear optics and number-resolving detection often suffer from low success probability. Here, we introduce the concept of dynamic stimulated emission, whereby a quantum emitter undergoes stimulated emission with a time-dependent coupling. We show that, for both...
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AIP | Astronomy (ASTRO)Contributed Oral
Stars like the Sun exhibit winds that are driven by thermal pressure, though the mechanism that provides the thermal energy remains unresolved. The energisation process is inherently dynamic, and leaves its fingerprints in fluctuations in the wind. At the Sun, the release of hot, dense plasma from closed magnetic field regions has been proposed as an explanation for compositions in certain...
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AIP | Physics Education (PEG)Contributed Oral
"There is no problem in science that can be solved by a man that cannot be solved by a woman" said North American astronomer, Vera Rubin. Yet the percentage of women, compared to men, solving problems in physics in Australia, is far from equitable. One of the factors cited by educators is the lack of representation of female physicists in the school science curricula. There are many obvious...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
String closepacking refers to the assumption that a system of multiple simultaneously fragmenting QCD strings can be described in terms of individual Lund strings fragmenting on an effective background created by other strings. The implementation of this idea in the Pythia event generator has had some success in describing observed strangeness-enhancement effects in high-multiplicity...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
Niobium has emerged as one of the most promising materials for superconducting quantum circuits. However, the coherence time of superconducting qubits is mainly limited by internal loss mechanisms such as two-level system, particularly at device interfaces. To further reduce these losses, thermal annealing is expected to improve the Nb/air interface by diminishing the surface native oxide....
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AIP | Physics Education (PEG)Invited talk
Abstract
Quantum information science and technology have been revolutionizing daily life, attracting the curiosity of younger generations from diverse backgrounds. However, owing to the abstract and counterintuitive nature of quantum mechanics, the teaching and learning of quantum information science is challenging in the context of non-physics majors. As an essential resource in quantum...
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ANZOS | Photonics and Optics (ANZCOP)Poster
Stimulated Brillouin scattering enables coherent coupling between optical and acoustic waves, providing a powerful platform for storing optical pulses in integrated photonic systems. Brillouin light storage relies on strict phase matching between the interacting optical and acoustic fields, making the process sensitive to the spectral and temporal properties of the optical pulses[1]. In...
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AIP | Quantum Science and Technology (QST)Contributed Oral
We present new methods for efficiently implementing quantum low-density parity-check (qLDPC) codes on hardware-constrained two-dimensional architectures. Our focus is on square-lattice devices with nearest-neighbour connectivity, motivated by physically realistic superconducting and silicon-based quantum processors. While qLDPC codes promise improved asymptotic performance compared with...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Continuous physical-layer security monitoring is essential for practical quantum key distribution (QKD) systems, as device imperfections and attacks may compromise the fundamental assumptions underlying ideal security proofs. In recent years, machine-learning-based anomaly detection methods have demonstrated strong capabilities in multi-domain fault and attack localization. However,...
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Scott Liles (UNSW)AIP | Condensed Matter & Materials (CMM)Invited talk
The global effort to develop quantum computers is driving the search for scalable methods to manufacture quantum chips and qubits. One promising pathway is to adapt the mature and highly scalable silicon manufacturing processes that underpin modern electronics, enabling quantum chips to be fabricated alongside conventional computer chips. This approach has generated substantial research...
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Nicholas Collins (The University Of Manchester)COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Isotopically enriched Si$^{28}$ produced by FIB enrichment has reached impurity levels greater than industry standard techniques [1-2]. It remains to be demonstrated that this material can achieve quantum measurements with lifetimes expected of this enrichment level.
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We demonstrate electron spin resonance (ESR) transitions in Si devices using our in-house built electrically detected magnetic... -
AIP | Quantum Science and Technology (QST)Poster
In recent years, spin qubits have achieved remarkable progress, surpassing 99% fidelity in both single- and two-qubit operations for the first time. Despite these advancements, several challenges remain critical to the successful development of this technology. One such challenge for spins in silicon metal-oxide-semiconductor devices involves engineering a global drive capable of addressing...
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Jadon LinAIP | Physics Education (PEG)Poster
Among all the topics covered in undergraduate physics, electromagnetism (EM) is notorious for its difficulty. Furthermore, despite being ubiquitous and highly relevant in contemporary society, it lacks appeal – a wow factor. Yet, EM is a springboard for a wide variety of topics from optics and quantum field theory to magnetohydrodynamics. Therefore, improving students’ understanding of...
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Daniel Morley (University of Western Australia)COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
The University of Western Australia (UWA) has established the use of Reactive Ion Etching (RIE) for n-on-p junction formation for high performance infrared imaging arrays made from Mercury Cadmium Telluride (MCT). A comprehensive understanding of RIE-induced effects on device parameters and the role of defects remains crucial for developing ultra-high quantum efficiency IR sensors and...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Liquid metal divertor systems are being developed for magnetic confinement tokamak fusion devices to counteract the damage sustained by typical solid designs due to bombardment from the fusion plasma. Lithium is one of the leading candidate metals for use in these systems. Due to the seeding of lithium into the fusion plasma, LiH molecules form in the edge region. Accurate collision data is...
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AIP | Quantum Science and Technology (QST)Poster
In order for quantum computers to reach their full potential in analysing genomic information - quantum bioinformatics [1] - there is a clear need for scalable and general methods for encoding genomic data into quantum states. This work builds on previous research that proposed and implemented a matrix product state based method for quantum state encoding [2] to allow for the encoding of...
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ANZOS | Quantum Computing and Quantum Information (ANZCOP QCQI)Contributed Oral
Quantum factoring is one of the most promising applications of quantum computing with practical real-world implications. Since its discovery by Peter Shor, researchers have reduced the memory requirements and optimised the gate counts of arithmetic subroutines for its implementation. Several notable advancements over the past year have brought the the memory cost of factoring a 2048 bit RSA...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Photovoltaic devices are increasingly required to operate under diverse illumination environments, including standard solar irradiation, indoor lighting, space spectra, and thermophotovoltaic thermal emission. These spectrum-dependent operating conditions create a high-dimensional optimization problem in which material properties, device architecture, and incident spectral profiles are...
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AIP | Quantum Science and Technology (QST)Poster
Cavity-array platforms and molecular polaritonic materials are more naturally described by generalized Tavis–Cummings lattice models that incorporate site-dependent nearest-neighbour photon hopping, site-dependent light–matter couplings, and local chemical potentials. These features make the model relevant for realistic light–matter systems, while also making classical simulation challenging...
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AIP | Quantum Science and Technology (QST)Invited talk
Simulations of chemical dynamics are a powerful means for understanding chemistry. However, classical computers struggle to simulate many chemical processes, especially non-adiabatic ones, where the Born-Oppenheimer approximation breaks down. Quantum computers could simulate quantum-chemical dynamics more efficiently than classical computers, but there is currently no complete quantum...
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AIP | Quantum Science and Technology (QST)Poster
The world is witnessing unprecedented automation - from self-driving vehicles and sophisticated large language models to automated trading algorithms and virtual agents. As we advance such agents to operate in ever more complex environments, successful agents must make ever more context decisions. Associated memory and energy costs are escalating at potentially unsustainable rates.
In...
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ANZOS | Quantum and Atom Optics (ANZCOP QAO)Contributed Oral
We investigate the behaviour of a pair of atomic ensembles confined to optical cavities which couple to one another through the exchange of light. Such atom-cavity systems are widely studied in quantum optics and have parallels to models from other fields, e.g., condensed-matter and nuclear physics. Hence, understanding the behaviour of such systems is relevant both within quantum optics and...
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Dr Timothy Newman (University of Sydney)AIP | Quantum Science and Technology (QST)Contributed Oral
The ability to send single photons over long distances is required for quantum networks, and also enables tests of fundamental physics. Erbium has optical transitions which couple to telecom-band photons, facilitating single photon transmission over tens of km.
Erbium ions are high performance light-matter interfaces, with a number of groups showing high-purity single photon emission [1],...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
Communicating quantum information beyond the order of metres requires minimally-lossy avenues of transmission. Optical fibres - internationally deployed as a backbone of modern, classical telecommunications - present the opportunity for such quantum information to be photonically networked with astonishingly low losses capable of reaching -0.091 dB/km within the telecommunications C-band...
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Giorge Gemisis (University of Technology Sydney)AIP | Quantum Science and Technology (QST)Contributed Oral
Multiple leading quantum computing technology platforms are based on microwave-frequency qubits embedded in superconducting electronic circuits. Due to loss and decoherence constraints, these systems require cryogenic environments and electromagnetic shielding to suppress unwanted electromagnetic interactions, blackbody radiation, quasiparticle interactions and spurious modes that can degrade...
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ANZOS | Quantum Computing and Quantum Information (ANZCOP QCQI)Contributed Oral
Superconducting qubits are highly susceptible to quasiparticle generation from background ionizing radiation, which produces energetic phonons capable of breaking Cooper pairs and inducing correlated errors. Following the observation of cosmic-ray–induced error bursts in large-scale superconducting qubit arrays [1], recent efforts have explored reducing the impact of ionizing radiation through...
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Hugh Paynter (Monash University)COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Graphene-based thermoradiative energy harvesting in the mid-infrared relies on maximising the photothermoelectric (PTE) response, which requires operation at a low Fermi energy ($E_F$). This creates a fundamental trade-off: conventional Fabry-Perot (FP) plasmonic resonances provide strong, spectrally selective absorption but require patterned graphene or a high $E_F$, reducing PTE efficiency....
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Atomic parity nonconservation (PNC) provides a sensitive low-energy probe of electroweak interactions and a pathway to test physics beyond the Standard Model (SM). PNC amplitudes arise from neutral currents mediated by the SM $Z$ boson and may receive additional contributions from hypothetical gauge bosons such as a $Z'$ boson.
For a low-mass $Z'$ boson, its contribution does not scale as...
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Tianqi Shen (Australian National University)AIP | Quantum Science and Technology (QST)Contributed Oral
Gravitational-wave detectors (GWDs) are fundamentally limited by quantum noise at kilohertz frequencies, reducing their sensitivity to binary neutron star mergers at the 0.9–5 kHz band. While externally injected squeezed vacuum is routinely used to suppress quantum noise, its bandwidth is fundamentally constrained. To overcome this limitation, a promising approach is to combine a lengthened...
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Josephine Dias (University of Queensland)AIP | Quantum Science and Technology (QST)Poster
Entanglement swapping enables entanglement to be shared between two parties that have never directly interacted. Two independent entangled pairs are prepared; one mode from each pair is sent to a central relay, where a joint Bell-type measurement is performed. Conditioned on the measurement outcome, the two remote retained modes are projected into an entangled state. This mechanism is a core...
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ANZOS | Quantum Computing and Quantum Information (ANZCOP QCQI)Contributed Oral
Entanglement distribution over lossy quantum channels is a fundamental challenge in quantum communication, where channel loss and decoherence progressively degrade the quality of shared entangled states. Noiseless linear amplification (NLA) offers a probabilistic but heralded solution to this problem, enabling entanglement distillation without violating the no-cloning theorem. However, the...
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Justin Brown (University of New South Wales)AIP | Quantum Science and Technology (QST)Contributed Oral
Most proposals for quantum networking rely on quantum memories to overcome photon loss and improve the success rate of entanglement distribution. Ensembles of rare-earth ions in solids have been extensively studied as promising candidates for quantum memories. Erbium ions implanted in silicon are a particularly attractive platform because of their excellent optical and electron spin coherence...
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AIP | Quantum Science and Technology (QST)Poster
Long-lived logical qubits are essential for fault-tolerant quantum computation. However, the practical performance of traditional error correction protocols relies on performing specific syndrome circuits, causing vulnerability to hardware defects and imposing rigid connectivity constraints. Recent theoretical findings have proposed that flexible subroutine circuits within the LUCI framework...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Optical tweezers have been used to trap micro- and nanoparticles varying in size from about 10nm up to many tens of microns. At the small end of this range, particles can be difficult to see, and it is possible for multiple particles to "invisibly" enter the trap. Generally, the higher the power of the trapping beam, the more likely it is that extra particles enter, which can change or corrupt...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
When examining collision events in particle collider experiments such as the ATLAS experiment at CERN, it is important to understand all processes that can give rise to a specific final state. This is often performed by studying Monte Carlo generated events to model Standard Model processes. We can model the hard scattering processes, but it is also important to consider the detector...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Circuit depth is a fundamental computational resource. In quantum computing, it serves as a direct proxy for the computational execution time before noise and decoherence dominate. A central question in (quantum) computation is whether increasing circuit depth strictly unlocks greater computational power. While crucial for designing scalable architectures, proving such a hierarchy...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum sensing under extreme conditions offers a powerful route to interrogate materials where conventional probes fail. Extending quantum sensing techniques into the gigapascal pressure regime promises new insight into phase transitions, emergent order, and critical phenomena in correlated materials. To date, most experimental efforts have focused on spin defects in diamond, whose remarkable...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
The effective design of new materials for sustainable energy conversion can be facilitated by the accurate prediction of electronic properties with moderate computational complexity and cost. The self-interaction error (SIE) of Kohn-Sham density functional theory (KS-DFT) leads to a non-physical, non-linear dependence of an orbital's energy on its own fractional occupation [Dabo et al., Phys....
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Exceptional points (EPs) are non-Hermitian spectral singularities where two or more complex eigenvalues and their corresponding eigenvectors coalesce. EPs and related topological phenomena continue to be investigated in a wide range of experimental settings. This talk will cover recent work on locating EPs in the eigenspectrum of free fermion quantum spin chains. At EPs the Hamiltonian becomes...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Dissipative cavity solitons (CSs) in monochromatically driven Kerr resonators have emerged as a leading platform for chip-scale coherent optical frequency comb generation. Recent experiments have revealed a new class of CS — the parametrically driven cavity soliton (PDCS) — which has been demonstrated in both quadratic-Kerr and purely Kerr resonators. Here, we focus on the latter...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Astronomical instrumentation regularly pushes the limits of science and engineering, enabling us to observe the Universe with ever-increasing precision, sensitivity and detail. The technologies developed for these extreme measurement challenges can also create impact beyond astronomy, with applications in medicine, environmental monitoring, mining, defence and space. This paper describes an...
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AIP | Condensed Matter & Materials (CMM)Invited talk
Altermagnetism, a recently established class of magnetic order, combines key features of ferromagnetism and Néel antiferromagnetism, leading to unconventional spin splitting without net magnetization. Building on our previous works [PRB 112, 184501 (2025); PRB 113, 024518 (2026); arXiv:2603.12897] on unconventional superconductivity in single-band treatment, we here investigate the crucial...
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Safiya Badri (The Australian National University)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Fibre-based frequency references offer a robust and cost-effective alternative to cavity-stabilised lasers for precision interferometry, including for space-based laser interferometer links. However, the long fibre coils used in these systems are highly sensitive to temperature fluctuations, necessitating effective thermal isolation. We have designed a multi-layer in-vacuum thermal shield to...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Solitons—self-reinforcing wave packets that propagate without dispersing—occupy a distinctive place in physics because they arise from a delicate balance between nonlinearity and dispersion, allowing them to behave like stable, particle-like excitations even as they carry topological or phase information through a medium. First identified in shallow water waves and later found in optical...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Tracking the dynamics of a continuously monitored quantum system is usually performed using quantum filtering, which estimates the present state from measurement records available up to that time. When real-time estimation is not required, later measurement records can also improve the retrospective estimate of a quantum state. This approach, known as quantum state smoothing, can recover...
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Rebecca Radebold (University of Sydney)AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum computers have the potential to deliver extraordinary computational power by harnessing unique quantum phenomena such as superposition and entanglement. However, quantum systems are very susceptible to noise, and scalable quantum computers will likely require mechanisms to systematically and reliably detect and correct errors during computations. To tackle this bottleneck, a wide...
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AIP | Condensed Matter & Materials (CMM)Poster
Lead-halide perovskites have shown promise as one of the leading materials in emergent photovoltaic technology design. Power conversion efficiencies close to 20% were achieved over a decade ago with single-junction perovskite solar cells (PSCs), and today efficiencies above 30% are seen in a wide variety of tandem cell architectures. One key advantage of these materials is the optoelectronic...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
In order to explore key problems in particle physics such as hadron spectroscopy, confinement and dynamical mass generation, we require a non-perturbative approach to describing our particle interactions. In quantum field theory, this is tantamount to understanding the full non-perturbative structure of the fermion and photon propagators, which in turn requires knowledge of the fermion-photon...
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AIP | Condensed Matter & Materials (CMM)Poster
Ever since the discovery of superconductivity in mercury by Heike Kamerlingh Onnes in 1911, tremendous effort has been directed towards expanding the varieties of high $T_C$ superconducting materials. In recent decades, interest in 2D superconducting materials has been gaining momentum due to its numerous potential applications for nanoscale devices such as superconducting transistors, quantum...
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The Galactic Centre Excess has long attracted attention as a potential signature of dark matter self-annihilation. However, an astrophysical origin remains a possible alternative, with one leading hypothesis attributing the excess to an unresolved population of millisecond pulsars. The next-generation Cherenkov Telescope Array Observatory may discriminate between these hypotheses by detecting...
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Jadon LinANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Light incident upon matter exerts a radiation pressure force, a phenomenon that enables applications such as optical tweezers and laser cooling. Typically, the matter that is moved by radiation pressure is treated as a rigid body, yet new physics and applications emerge when considering radiation pressure on elastic bodies. The simplest interaction involves pulses of laser light reflected off...
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Aaditya Datar (Griffith University)AIP | Quantum Science and Technology (QST)Contributed Oral
Bell inequality violations have been a paradigmatic framework to quantify how strongly nature departs from assumptions that seem reasonable from a classical perspective. More precisely, they show that no theory can simultaneously uphold the assumptions of absoluteness of observed events, freedom of choice, relativistic causality, and classical cause-effect relations. Furthermore, while it is...
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AIP | Quantum Science and Technology (QST)Invited talk
Achieving universal, fault-tolerant photonic quantum computing requires architectures that seamlessly integrate scalable linear circuits with strong nonlinear resources. Historically, incorporating single-photon-level nonlinearities across large-scale linear networks has been a major bottleneck, limiting most optical processors to non-universal linear operations. To overcome this, we introduce...
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Jayden Hasted (The University of Queensland)AIP | Theoretical Physics (TPG)Contributed Oral
Atomic theory plays an irreplaceable role in the determination of nuclear moments from measured hyperfine structure. Such quantities permit the interrogation of nuclear structure in model-independent ways. Indeed, magnetic dipole and electric quadrupole moments have become standard benchmarks for nuclear models, but higher-order moments can impose additional and unique constraints.
Atomic...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Lasers that combine ultranarrow linewidths with high output power over a broad spectral range are critical for quantum technologies and space applications. Diamond Raman Lasers (DRL) with intracavity frequency doubling provide a versatile platform for generating single-frequency, high-power lasers at wavelengths that are hard to reach. This capability is enabled by the frequency shift...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
The capability to switch or modulate the light output from nanoscale structures is essential for the development of nano-sensing technology and high-density photonic computing. In their bulk form, metal halide perovskites have shown promise for optoelectronic applications including solar cells, photodetectors, and ionizing-radiation detectors. In low-dimensional perovskites, the additional...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Hybrid mode-selective photonic lanterns (HMSPL) provide a route to combine efficient multimode coupling with mode-specific single-mode extraction, which is attractive for astrophotonic instrumentation, wavefront sensing, and spatial-mode manipulation[1]. We present two six-core HMSPL designs targeting preferential selection of the LP01 and LP02 modes using circular packing [2].
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The... -
AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
We theoretically consider periodically driven Bose-Einstein condensates whose scattering length is modulated sinusoidally. In experiments, such superfluids have been observed to develop Faraday waves [1] and pattern forming dynamics [2,3]. However, due to the absence of dissipative restoring forces, these systems rapidly transition to quantum turbulence. By introducing a phenomenological...
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ANZOS | Photonics and Optics (ANZCOP)Poster
It has recently been shown that Discrete Time Crystal (DTC) behavior may arise in the periodically driven, open Dicke model in the thermodynamic limit ($N \rightarrow \infty$). In this work, we demonstrate that finite $N$ non-mean-field fluctuations in this model can lead to decay rates and amplitudes of transient DTCs that display a non-trivial non-monotonic behavior with an increasing...
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ANZOS | Quantum Computing and Quantum Information (ANZCOP QCQI)Poster
The quantum simulation of quantum systems in materials science and quantum chemistry would have a considerable impact on both our understanding and industrial applications.
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Such scientific and commercially relevant sized quantum simulations will require large scale fault tolerant quantum computers, and thus it is crucial that algorithms and compilation methods are improved to lower the... -
AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
We investigate the feasibility of measurement and feedback (MF) control protocols as a means to produce large-scale Bose-Einstein condensates of ultra-cold atomic gases using a recently developed phase-space approach [1] to capture unconditional dynamics of the full quantum-field under measurement and feedback. For experimentally accessible regimes in quasi-two-dimensional geometries, our...
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ANZOS | Optical Materials and Fabrication (ANZCOP OMFAB)Invited talk
Optical fibres are attractive sensing platforms for harsh environments, but their ultimate operating temperature is set by the stability of both the glass and the laser-written structure. Femtosecond laser direct writing offers a unique route to locally engineer the refractive index and microstructure of optical glasses and fibres, enabling compact photonic devices and fibre sensors for harsh...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Fibre-optic gyroscopes (FOGs) provide a clear and accessible demonstration of relativistic physics suitable for the undergraduate laboratory. Although the rotational and propagation speeds involved are far below the speed of light, the operation of a fibre-optic gyroscope depends on the relativistic transformation of the speed of light in a moving medium. In this paper, we compare the...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
High-sensitivity magnetometry enables applications ranging from magnetoencephalography and magnetic anomaly detection to geological surveying and searches for dark matter and other exotic particles. Though SQUIDs and SERF atomic magnetometers offer benchmark sensitivities, their dependence on cryogenics or near-zero-field operation limits deployability, prompting room-temperature alternatives...
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Dr Martin Ams (Macquarie University)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Many industrial environments remain challenging for optical humidity sensing due to prolonged exposure to high humidity, corrosive gases, high temperatures, or contamination. We present a field validation of optical fibre Bragg grating (FBG) temperature and humidity sensors deployed for continuous psychrometric monitoring within an operational activated-carbon wastewater odour control unit...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Quantum sensors utilizing atomic vapours can enable passive, GPS-free navigation through their exquisitely sensitive and stable measurements of inertial quantities and magnetic fields. These quantum measurements make bounded position-fixing possible in environments where GPS is unavailable or untrusted —irrespective of mission duration or distance travelled— through map matching against...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Purpose
End-to-end (E2E) verification in image guided radiotherapy (IGRT) ensures the delivered radiation dose corresponds to the intended target throughout the treatment workflow. Conventional E2E methods rely on radiochromic film, requiring time-consuming processing and preventing rapid feedback. This study investigates the feasibility of using the high-spatial- and...
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Francesco Campaioli (RMIT University)AIP | Quantum Science and Technology (QST)Invited talk
Critical phenomena at finite temperature underpin a broad range of physical systems, yet their study remains challenging due to computational bottlenecks near phase transitions. Classical Monte Carlo methods suffer from critical slowing down, while the sign problem presents a challenge in their quantum counterpart. Quantum simulators have attracted significant interest as a tool for studying...
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AIP | Condensed Matter & Materials (CMM)Poster
Rare-earth-doped oxide materials have emerged as a versatile platform for a wide range of
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quantum technologies due to their unique optical and magnetic properties [1]. The highly
localized 4f electrons of rare-earth ions are largely shielded from the surrounding crystal
environment, resulting in exceptionally narrow optical transitions and long spin coherence
times. These... -
AIP | Condensed Matter & Materials (CMM)Poster
After the successful discovery of MgB$_2$ (Tc= 39K) as a high-temperature superconductor has opened the doors for series of Boron and carbon based 2D models in condensed matter physics. Among different 2D materials, transition metals MXenes and MBenes (M$_2$X, where X = C, B) have been widely explored for their electronic, magnetic, and electrochemical properties, but have yet to be widely...
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AIP | Nuclear and Particle Physics (NUPP)Focus session talk
The FCCee b2Luigi Automated Reconstruction And Event processing (FLARE) package is an open source python based data workflow orchestration tool powered by b2luigi. FLARE automates the workflow of Monte Carlo (MC) generators inside the Key4HEP stack such as Whizard, MadGraph5_aMC@NLO, Pythia8 and Delphes. FLARE also automates the Future Circular Collider (FCC) Physics Analysis software...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
Trends in nuclear excited-state observables along isotopic or isotonic chains can reveal changing nuclear shell structure and emerging physics away from stability. Nuclear magnetic moments, or g factors, are an important observable for challenging nuclear shell-model predictions due to their sensitivity to the ratio between broken proton and neutron pairs and their orbital occupation....
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Christine Little (James Cook University)AIP | Quantum Science and Technology (QST)Contributed Oral
Understanding and controlling long-range interaction effects in nonequilibrium quantum systems is a key challenge in quantum physics that underpins emerging quantum technologies. This has applications across quantum transport, nanoscale force engineering and quantum information processing.
Stemming from correlated quantum fluctuations, dispersion forces between two current-carrying...
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AIP | Solar Terrestrial and Space Physics (STSP)Contributed Oral
Electric sails (E-sails) are a spacecraft propulsion method that uses flowing environmental plasma such as the solar wind or the Earth’s ionosphere to move a spacecraft, like how a sail on a boat uses the wind for propulsion. Unlike the sails on a boat, what captures the momentum of the flow is not a physical sail but the electric field around wires held at high voltage. Even though the...
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Itamar Oren (UNSW)AIP | Quantum Science and Technology (QST)Poster
Silicon hole-spin qubits are a promising platform for scalable quantum computing because of their compatibility with established semiconductor fabrication technologies and their potential for fast, electrically driven qubit control through strong spin-orbit interactions. However, these advantages come with increased sensitivity to charge noise, placing stringent requirements on the performance...
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ANZOS | Photonics and Optics (ANZCOP)Poster
This study utilizes the simulation software OptiSystem to construct a high-speed random sequence transmission system. At the transmitter, a 1554 nm laser is split by a polarization beam splitter (PBS) and driven by two channels of binary OOK signals via Mach-Zehnder modulators (MZMs), configured with a 2 ns bit delay and a 3 dB optical attenuation to set a 2:1 amplitude weight between the...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Portable optical-frequency atomic clocks have reached a maturity level that allows them to be used outside of a laboratory setting. Specifically, portable optical clocks have been demonstrated in sea trials [1], in urban deployments [2], and clock sub-systems have even been operated on-orbit [3]. Portable optical clocks will be integral in advancing fundamental physics including tests of...
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Scott Bailey (Adelaide University)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Photonic integrated lasers in the near infrared and visible offer narrow linewidths in a compact form factor, enabling portable quantum sensing technologies with performances that match traditionally lab bound systems. The application of these chip lasers requires careful design and operation considerations to meet the strict wavelength, power and modulation performance parameters, which can...
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Jake Wilson (Australian National University)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
In this work, we characterise the frequency stability of a thermally isolated fibre frequency reference in the $0.1\,\mathrm{mHz}$ to $1\,\mathrm{Hz}$ frequency band relevant to laser stabilisation in inter-satellite ranging missions. Inter-satellite ranging using laser interferometry provides the precision of interferometry on a large enough scale that it can be used to probe physical...
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ANZOS | Photonics and Optics (ANZCOP)Poster
A temporal boundary occurs when a material’s property changes abruptly everywhere at the same time.¹ Applications include frequency conversion and nonreciprocal devices.²˒³ When a wave encounters a temporal boundary at which the refractive index jumps from $n_1$ to $n_2$, the incident wave splits into a forward and a backward wave at unchanged $k$, but at a new frequency...
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ANZOS | Quantum Computing and Quantum Information (ANZCOP QCQI)Contributed Oral
Fault-tolerant quantum computers have the potential to enable predictive simulations of strongly correlated materials beyond the capabilities of classical computation. However, connecting realistic electronic structure calculations to concrete fault-tolerant resource estimates remains an open challenge. In this work, we present an end-to-end workflow that bridges this gap, beginning with ab...
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Ao-Wen Zhou (University of Sydney)AIP | Condensed Matter & Materials (CMM)Poster
Point defects in low-dimensional semiconductors have emerged as promising building blocks for quantum technologies, including single-photon emitters, spin qubits, quantum sensors, and spin-based quantum devices. Two-dimensional materials are particularly attractive in this context because their atomically thin geometry enables electrostatic tunability, strain engineering, and integration with...
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Mr Alan Chan (Mount Stromlo Observatory, The Australian National University)AIP | Astronomy (ASTRO)Contributed Oral
Type Ia supernovae remain one of the key observational probes of dark energy, but their cosmological constraining power depends on constructing Hubble diagrams with well-understood observational biases. In future high-statistics time-domain surveys, including TiDES and Rubin/LSST-era supernova programmes, host-galaxy redshifts will often need to be obtained under finite spectroscopic...
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Mr Alan Chan (Mount Stromlo Observatory, The Australian National University)AIP | Astronomy (ASTRO)Poster
Type Ia supernovae remain one of the key observational probes of dark energy, but their cosmological constraining power depends on constructing Hubble diagrams with well-understood biases. In future high-statistics time-domain surveys, including TiDES and LSST-era spectroscopic follow-up programmes, host-galaxy redshifts will often need to be obtained under finite spectroscopic resources. It...
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AIP | Quantum Science and Technology (QST)Invited talk
Molecular absorption spectroscopy is one of the most widely used tools for identifying and characterising matter. In a typical experiment, light is sent through a sample and the transmitted signal reveals information about the molecules present. Usually this light is well described by a classical laser field, or coherent state, which provides the standard benchmark for performance.
In this...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Predictive plasma modelling depends critically on the quality of the underlying atomic and molecular physics data: scattering cross sections, attachment and ionisation thresholds, dissociation energetics, fragment stabilities, and reaction pathways. This is especially important for electronegative dielectric gases, where small errors in molecular energetics can propagate into large...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
Starting at the quark level it has proven possible to build a remarkably accurate description of even-even nuclei across the periodic table, with very few parameters compared with other approaches, starting at the quark level. We will present recent results on the structure of superheavy nuclei as well as results of the extension of the model to neutron stars. The latter may include the...
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ANZOS | Quantum and Atom Optics (ANZCOP QAO)Contributed Oral
Resonantly driven many-body systems, such as a Bose-Einstein condensate of ultracold atoms, can exhibit dramatic breaking of time-translation symmetry, allowing the formation of crystalline structures in time having many tens of temporal lattice sites [1]. Such temporal structures can open new frontiers in condensed matter physics, including temporal analogues of Anderson and many-body...
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Edward Simpson (Australian National University)AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
Low-energy nuclear reactions are the fundamental process that underpins many applications of nuclear science, from the production of life-saving radioisotopes to the origins of the elements in the universe. These applications require comprehensive information about nuclear reaction probabilities, via angular-differential cross sections, as a function of the collision energy.
The reactions...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
We examine a new tool utilising Graph Neural Networks (GNNs) for particle reconstruction, to enable investigation of rare and physically interesting $B$-meson decays. Belle II is an experiment at the SuperKEKB asymmetric electron-positron collider at KEK in Japan, that studies large numbers of pairs of $B$ mesons produced at the Upsilon(4S) resonance. These $B$ mesons decay in a multitude of...
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Pedro Sansoldo (Adelaide University)ANZOS | Photonics and Optics (ANZCOP)Poster
Nonlinear Photonic Integrated Circuits (NPICs) are promising platforms for next generation compact precision measurement and telecommunication technologies, for example, the generation of compact optical frequency combs. As the nonlinear optical generation efficiency depends on the intensity of light travelling in NPIC’s waveguiding structures, waveguide materials with high linear and...
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AIP | Astronomy (ASTRO)Invited talk
The LIGO, Virgo, and KAGRA (LVK) collaborations have announced the detection of over 260 binary black hole signals. Each one encodes information about the masses and spins of merging black holes. In this talk, I describe several highlights from this black-hole haul. First, using the loudest event, GW250114, we experimentally verified Hawking’s famous area law, which predicts that the surface...
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ANZOS | Quantum Computing and Quantum Information (ANZCOP QCQI)Contributed Oral
In equity markets, many risks do not arise from individual stocks in isolation, but from shared price movements, high return correlations, similar sector exposures, and comparable sensitivities to common risk factors. Stock clustering can help reveal latent groups of equities that may react similarly to market shocks, enabling investors to detect hidden risk concentrations, assess whether a...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum error correction promises a practical pathway to fault-tolerant quantum computing; however, typical error-correcting codes, such as the surface code, suffer from asymptotically vanishing code rates and high resource overheads. Quantum low-density parity-check (QLDPC) codes have emerged as promising candidates to overcome these limitations. However, designing high-performance QLDPC...
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Dr Simon White (Queensland Quantum and Advanced Technologies Research Institute, Centre for Quantum Computation and Communication Technology, Griffith University, Yuggera Country, Brisbane, Queensland, 4111 Australia)AIP | Quantum Science and Technology (QST)Contributed Oral
The generation of entangled quantum states of photons is a key capability for a vast range of technologies and forms the foundations of quantum communication, computation, and metrology. In photonics, due to the lack of strong photon-photon interactions, the generation of the vast majority of entangled states is probabilistic. This typically requires post-selection to identify successful...
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Gargi Tyagi (The University of Sydney)AIP | Quantum Science and Technology (QST)Contributed Oral
The field of hybrid optical-microwave technology is advancing rapidly, driven by goals such as integrating telecom wavelength optical fibre networks with superconducting circuit-based quantum technology. We present a new protocol for generating entanglement between microwave and optical modes, with an inbuilt quantum memory. The protocol is a hybrid extension of Rephased Amplified Spontaneous...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Trivalent Erbium ions in solid state hosts (Er$^{3+}$) are exceptional quantum emitters combining narrow optical transitions within the telecom C-band with long electron and nuclear spin coherence times at cryogenic temperatures. However, the weak point of Er$^{3+}$ sites is their relatively long optical decays exceeding milliseconds and drastically limiting Er$^{3+}$ emission rates in bulk...
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Mr Junru Chen (ANU TMOS node)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Two-dimensional materials have emerged as a versatile platform for nonlinear and quantum photonic applications. In particular, rhombohedral (3R) polytypes of transition metal dichalcogenides, such as 3R-MoS$2$, feature a strong second-order nonlinear response and intrinsic C$_{3v}$ crystal symmetry. These properties allow polarization-entangled photon-pair generation through spontaneous...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Rapid growth of AI leads to an increasing demand for computational systems capable of processing large datasets. As AI workloads become large, conventional computing architectures face challenges with energy consumption and scalability. Photonic reservoir computing offers an attractive solution for certain machine learning tasks by exploiting the intrinsic dynamics of physical systems. While...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Tunable long-wave infrared (LWIR) optical filters are key enabling components for compact multispectral and polarization-sensitive thermal imaging systems. Here, we demonstrate geometry-driven polarization engineering in microelectromechanical systems (MEMS)-integrated extraordinary optical transmission (EOT) filters based on a dual-membrane plasmonic metamaterial platform. Resonant EOT modes...
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AIP | Quantum Science and Technology (QST)Contributed Oral
We use the Gross–Pitaevskii equation to study the evolution of Bogoliubov excitations in a Bose–Einstein condensate with arbitrary one- and two-dimensional geometries. By numerically solving the time-dependent equation in experimentally relevant trapping potentials, we analyze how boundary conditions and density inhomogeneities modify the excitation spectrum and nonlinear mode dynamics. In a...
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Gauri Goenka (UNSW Sydney)AIP | Quantum Science and Technology (QST)Poster
High-dimensional nuclear spins are attractive candidates for use as ancillas in quantum computation, given their exceptionally long coherence times, and could also help scale down the size of quantum processors. Nuclear spin qubits and qudits have been studied extensively in donor-based silicon platforms, but Group IV atoms such as ⁷³Ge — which possesses a high-spin nucleus isoelectronic with...
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AIP | Astronomy (ASTRO)Contributed Oral
The detection and characterisation of exoplanets requires the suppression of the overwhelming glare of their host stars while preserving the much fainter planetary signal. We present GLINT (Guided-Light Interferometric Nulling Technology), which is a nuller interferometer operating within the SCExAO instrument at the Subaru Telescope. This presentation introduces the current GLINT...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
Recent experimental results have shown Au nanoparticles (NP) in liquid Ga (liq-Ga) are excellent photocatalysts for benzyl alcohol conversion to benzaldehyde. When the Au NPs are placed in liq-Ga they develop an ultra-thin amorphous-GaOx (a-GaOx) skin/film which is expected to play an important role in the photoreaction. Therefore, understanding the reaction mechanism requires atomic level...
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Alexander McIntosh (School of Physics, UNSW Sydney)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Deterministic control of light propagation through complex scattering media has enabled applications including optical communications, metrology, nonlinear optics, and, most notably, multimode fibre microscopy and imaging. Central to these applications is the generation of high-fidelity optical fields at the distal facet of the fibre using wavefront shaping elements such as liquid crystal...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
The ATLAS detector at the Large Hadron Collider measures the energy of particles using calorimeters. These are volumes segmented into many individual cells, each recording a small deposit of energy as a particle passes through. The cell-by-cell structure has a natural geometric and topological form which is well suited to graph neural networks (GNNs), a class of machine learning models...
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AIP | Quantum Science and Technology (QST)Poster
We show that when one half of a logical Bell pair is transported through a gravitational field, the differential proper time accumulated between two error-corrected memories manifests as a relative unitary $U_{\rm rel} = U_A^\dagger U_B$ in the reference frame of the stationary memory. This evolution is indistinguishable from free precession within each memory's local inertial frame, and is...
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Rama Vadapalli (Student)
Geometric optics effectively describes electromagnetic wave propagation when the wavelength is much smaller than the characteristic length scale of the medium, making wave phenomena like diffraction negligible. As a result, light propagation in a vacuum is typically modelled by rays that follow null geodesics. However, general relativity predicts that polarization-dependent deviations from...
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AIP | Quantum Science and Technology (QST)Contributed Oral
We will establish the Southern-Hemisphere node (GravNet-Australia) of an international quantum-sensor network for high-frequency-gravitational-wave (HFGW) and wave-like-dark-matter discovery (GravNet). By linking cryogenic acoustic resonators, electromagnetic cavities, inertial sensors, precision timing infrastructure, and low-noise quantum readout across UWA, Swinburne, SUPL, and NMI. The...
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Black-hole horizons, the "surfaces of no return", lie at the intersection of general relativity and quantum theory, but they are extremely difficult to probe observationally. In this talk, I will present our analysis of GW250114, the loudest binary black-hole signal observed so far, and report observational evidence for a "direct wave" component associated with the newly formed black-hole...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
The magnetic moment or $g$ factor of a nuclear quantum state gives a sensitive test of its proton versus neutron character. There are extensive data on the first-excited states of even-even nuclei measured by the transient-field technique. However, many of these data have a large uncertainty due to the difficulty of calibrating the transient field, which must be referenced to an independently...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Developing high bandwidth portable quantum sensors is of significant importance for both terrestrial and satellite communications. The nitrogen vacancy center in diamond is a popular quantum sensing platform for its relative simplicity and wide range of acceptable operating conditions, but suffers from a limited instantaneous bandwidth due to the narrow MHz-scale linewidth of the magnetic...
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ANZOS | Photonics and Optics (ANZCOP)Invited talk
Single-frequency fiber lasers have advantages such as high power, broad spectral coverage, excellent beam quality, and good robustness. During the development of 589 nm sodium guide star lasers for astronomical adaptive optics, our team has developed key technologies including high-power single-frequency fiber amplifiers, ultra-broadband wavelength tuning of fiber lasers, and high-efficiency...
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Benjamin Field (University of Sydney)AIP | Quantum Science and Technology (QST)Contributed Oral
A quantum memory using the extremely long-lived coherence time of the rare-earths, offers a unique way to overcome the photon loss of traditional transmission methods [1]. By storing large numbers of photonic modes, transporting the memory to the destination, and reading out the states with high efficiency, such a quantum hard-drive has applications in quantum communication and fundamental...
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ANZOS | Photonics and Optics (ANZCOP)Poster
There is an impending capacity crunch for current optical fibre communications networks. The foremost solution to increase network bandwidth is the deployment of high spatial density multicore fibres. However, the integration of these fibres into the network requires additional fibre amplifiers for every new fibre core. Repeaters in subsea cables are volume restricted and cannot currently...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
High-fluence pulsed laser deposition expands the accessible growth window for 50 nm-thick YBa2Cu3O7−δ (YBCO) films grown on (100) SrTiO3 (STO) substrates. By employing elevated laser fluence, high-quality films are obtained across a broad 40 mm target-to-substrate distance (TSD) range, substantially relaxing the growth constraints typically associated with thin YBCO film fabrication....
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Stimulated Brillouin scattering enables narrow-linewidth, GHz-centered photonic filtering, making it a key building block for integrated microwave photonics. Accessing radio-frequency bands beyond 15 GHz with SBS requires high frequency shifts and high gain coefficients, a combination that yet remains a challenge. Existing integrated platforms face a fundamental trade-off between Brillouin...
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ANZOS | Quantum Computing and Quantum Information (ANZCOP QCQI)Poster
Coupling electron spins to microwave photons directly is a challenge, due to the intrinsically weak magnetic dipole interaction. To overcome this, most work involved creating an artificial spin-orbit coupling (SOC) via micromagnets. This, however, imposes spatial constraints on device scaling. Recently, it was shown that the intrinsic SOC in SiMOS spin qubits can be heavily amplified by...
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ANZOS | Photonics and Optics (ANZCOP)Poster
High-power single-frequency lasers with controllable spatial modes are highly desirable for coherent detection, precision measurement, remote sensing, and nonlinear optics. However, simultaneously achieving high power, narrow linewidth, low noise, and flexible spatial-mode control remains challenging. In this presentation, we will introduce our recent progress in high-power single-frequency...
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Hanlin Li (The University of Auckland)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Prostate cancer (PCa) is the most diagnosed cancer among males and the second leading cause of cancer death in males in New Zealand. Current diagnosis still relies on biopsy-based tissue sampling and histopathological assessment. During prostate cancer surgery, no tools can assess prostate tissue in real time, thus leading to a high positive surgical margin rate. Raman spectroscopy (RS),...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Microwave cavity displacement readout provides a powerful route to high-sensitivity mechanical sensing and quantum transduction when the cavity frequency depends quadratically on membrane position. This quadratic response enables quantum non-demolition phonon-number measurements, suppresses linear back-action at symmetry, and provides a route to resolving mechanical energy quanta. We...
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AIP | Astronomy (ASTRO)Poster
History of Australian Astronomy Chapter (HAAC) is a new chapter of the Astronomical Society of Australia. With the enthusiastic support of people across Australia, the chapter was established to recognise Australia’s rich and diverse astronomical history, both Indigenous and European. The chapter aims to bring together astronomers, historians, curators, educators and specialists in this field...
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AIP | Nuclear and Particle Physics (NUPP)Poster
The NUPP (Nuclear and Particle Physics) Group of the AIP (Australian Institute of Physics) provides an important component of the National Congress of the AIP (around 10% of all papers presented to congresses between 1974-2004 were from this Group) [1]. However, prior to 1988, national conferences in this area were held separately, under the auspices of AINSE, the Australian Institute of...
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We propose a scheme by which a wavelet bulk description of a quantum field theory (QFT) can be equipped with an information metric based on local multiscale correlation functions. The method is applicable to any quadratic QFT that need not be a conformal field theory (CFT). The resulting metric is that of (asymmetrically) warped Euclidean anti-de Sitter (AdS) space. We study the relationship...
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AIP | Astronomy (ASTRO)Poster
Dark matter halo formation history correlates strongly with halo concentration,
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but it remains unclear if other halo and galaxy properties retain memory of
assembly once halo mass is fixed. We use the large-volume hydrodynamical
FLAMINGO simulation
to investigate this question for a statistically robust sample of 30,665 central haloes
selected in a narrow present-day mass bin centred on... -
AIP | Astronomy (ASTRO)Poster
Abstract
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Experiments in high-energy particle physics reveal that neutrons withstand very high levels of mutual compression – the levels expected inside Neutron Stars. No limit to this elastic compressibility is indicated. A new approach to the general relativity (GR) modelling of Neutron Star cores is here suggested, utilizing a robust internal observer. As Neutron Stars are modelled at... -
AIP | Quantum Science and Technology (QST)Contributed Oral
A large-scale quantum computer employing dopants in silicon requires a low background spin bath to prolong coherent quantum states. This presentation reviews our progress optimising the materials for this goal. We show that high fluence 28-Si ion irradiation of natural silicon depletes the problematic nuclear spin I=½ 29-Si isotope from 47,000 parts per million (ppm) to ~2 ppm. At this...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum states and operators can be represented in many different ways. One useful representation assigns values to points of a finite phase-space grid, giving a discrete analogue of the Wigner function. These discrete Wigner functions are useful in quantum information because they can reveal nonclassical behaviour, support calculations with finite-dimensional systems, and connect naturally to...
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Daniel Dahl (The University of Sydney)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Hybrid mode-selective photonic lanterns (HMS-PLs) are an emerging astrophotonic technology that enable simultaneous mode-selective light injection and wavefront sensing. Unlike conventional photonic lanterns, HMS-PLs selectively couple the fundamental LP01 mode from a multimode input into a dedicated single-mode output, while higher-order modes are distributed among the remaining outputs for...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
The rapidly increasing data-intensive AI workloads and large-scale data centers are driving a fundamental shift toward energy-efficient, scalable, and compact computational hardware design. Neuromorphic computing addresses this need by integrating neurobiological principles with physical hardware to enable fast, low-power, and low-latency processing.
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Photonic platform is well-suited for... -
Mark Watson (The University of Qeensland; ARC Centre of Excellence in Quantum Biotechnology (QUBIC))ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Nitrogen-vacancy (NV) centre nanodiamonds are powerful biophysical probes that enable precise measurements of local environments through optical detection. The NV defect is accessible via optically detected magnetic resonance (ODMR), where shifts in the resonance frequencies are sensitive to temperature, strain, and electromagnetic fields. Achieving dynamic and accurate spatial control of...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
In this study, we have fabricated an oval-tube antiresonant HCF with an outer diameter of 4.56 mm × 5.25 mm with different lengths using a 3D printing method for D-band operation. The proposed design employs a non-uniform cladding to shift resonance frequencies and spatially distribute leakage, resulting in lower loss and a broader low-loss transmission window without altering the overall...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
Hyper-Kamiokande is a next-generation underground water Cherenkov detector that will probe leptonic CP violation, the neutrino mass ordering, proton decay, and astrophysical neutrinos. Achieving this physics reach requires precise knowledge of the detector's photosensor response, since the sensitivity to CP violation and oscillation parameters rests on accurate reconstruction of Cherenkov...
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Tongmiao Fan (Australian National University)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Hyperentangled photon pairs are key resources for quantum high-dimensional communications, information processing, imaging, and fundamental studies of nonclassical phenomena. Polarization, orbital angular momentum (OAM), and frequency offer complementary resources for multidimensional quantum photonics [1]. However, conventional generation of such states relies on bulk nonlinear crystals...
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Highly compact, filter-free multispectral photodetectors have important applications in biological imaging, face recognition, and remote sensing. In this work, III-V semiconductor nanowire arrays were successfully synthesized and demonstrated as high-performance infrared photodetectors for multispectral imaging.
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AIP | Quantum Science and Technology (QST)Contributed Oral
Ramsey spectroscopy is a cornerstone technique for precision frequency estimation, but its standard analysis assumes a classical noise environment that can be reset before each measurement. We investigate the impact of genuinely quantum noise on sequential Ramsey spectroscopy of a single probe qubit coupled to a bosonic bath through a purely dephasing interaction. Unlike a classical source, a...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Transmission geometry X-ray tubes are popular devices used in portable and specialised X-ray spectroscopy applications due to their small size and effectiveness at low power. However, purpose-built models for predicting their X-ray emission remain absent from the literature. Scientists requiring accurate transmission geometry X-ray tube models are currently limited to imprecise alternatives....
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AIP | Quantum Science and Technology (QST)Contributed Oral
Laser-cooled and trapped two-dimensional (2D) crystals comprising
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hundreds of ions are now an established platform for quantum simulation and quantum sensing. Previous work has produced high-fidelity readout, individual addressing and tunable interactions through the implementation of site-resolved imaging, coherent single-ion control and spin-dependent optical dipole forces (ODFs),... -
AIP | Quantum Science and Technology (QST)Contributed Oral
Accurate computation of chemical energies is a challenging problem for classical computers, that quantum computers are expected to be able to accelerate. While the argument for advantage in the fault-tolerant regime is relatively clear, the required circuit depths are well beyond current hardware capabilities. Recently, focus on near-term techniques has shifted to quantum-centric...
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Julian Berengut (University of New South Wales)AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
We present recent theoretical and computational updates to the CI+MBPT method (configuration interaction with many-body perturbation theory) as implemented in AMBiT [1]. The efficiency gains have been orders-of-magnitude and have enabled the complete saturation of CI in large open-shell atoms. Taken with treatment of core-valence correlations using MBPT, we produce the emission spectrum of...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Surface enhanced Raman spectroscopy (SERS) is a promising method for accessing the wealth of information carried by extracellular vesicles (EVs). However, ensuring analyte adsorption onto the enhancing nanostructure and concentration in local electromagnetic hot-spots is a critical aspect of a functional SERS device. The exact deposition dynamics are largely governed by substrate wettability,...
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1ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Inverse design methodologies have shown great promise in improving on-chip nanophotonic components. Unlike conventional design techniques, which tune only a handful of basic parameters such as waveguide widths or gaps, inverse design algorithms like SPINS (Stanford Photonic INverse design Software) [1] optimise over a much larger parameter space to generate compact, unintuitive, and often...
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ANZOS | Photonics and Optics (ANZCOP)Poster
Non-destructive testing using multiple wavelengths is essential because the items inspected for foreign matter in daily-use goods and industrial products on factory production lines are composed of multiple materials. Carbon nanotubes (CNTs) can be dissolved in a solvent and printed on substrates. Printed CNT thin films can be applied as multi-wavelength sensors for non-destructive testing,...
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AIP | Astronomy (ASTRO)Invited talk
Circumplanetary disks (CPDs) are accretion disks surrounding forming planets and are thought to play an important role in planet and moon formation. However, their small spatial scales and faint emission make them difficult to detect, requiring deep, high-resolution observations.
The exoALMA survey (Teague et al. 2025) provides some of the deepest high-resolution observations of...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
The Josephson junction is the fundamental building block of superconducting circuits. Although critically important, its manufacture has proved highly variable, resulting in large distributions of circuit parameters due to the stochastic nature of the deposition process and material disorder. The recent discovery of the alternating bias-assisted annealing method has reintroduced interest in...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
For the rare-gases, the inelastic momentum transfer (IMT) cross-sections associated with electron-impact excitation and ionisation have not been studied extensively to date, although they are expected to play an important role in modelling electron transport in plasmas with improved accuracy. These cross-sections remain unavailable in most international databases. They are particularly...
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Thanks to the rapid progress in observational cosmology, we have begun to understand the physics of the very early Universe, the inflationary expanding universe. However, our knowledge is still far from complete. Based on my personal perspective, I will first review what inflation is and what we currently know about it. Then I will discuss some recent topics that may improve our understanding...
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Mr Patrick Grant (University of Queensland; ARC Centre of Excellence in Quantum Biotechnology (QUBIC))ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Active baths are the non-equilibrium equivalent of a thermal bath, comprised of several motile active particles that convert the energy in their surroundings into motion. Understanding the statistical and dynamic properties of an active bath of particles, such as E. coli bacteria, have important implications in uncovering novel far-from-equilibrium physics that are potentially generalisable to...
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Milo Langker (University of Sydney)AIP | Astronomy (ASTRO)Contributed Oral
High-resolution astronomical imaging is conventionally constrained by the diffraction limit, which imparts a wavelength-dependent scaling on the impulse response of the optical system. This inherent chromaticity implies that images of unresolved sources encode their spectra. We demonstrate that with a differentiable forward model coupled with a rigorous information-theoretic approach, optimal...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Single-crystalline III–V semiconductor nanofilms are an intriguing but still underused device architecture. They use planar ultrathin films (<100 nm) as the active material, combining very high surface-to-volume ratios with minimal optical thickness. The high surface-to-volume ratio is attractive for sensing[1], while the reduced optical thickness enables photodetector designs where...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Optogenetics has transformed neuroscience by enabling optical control and readout of neuronal activity in vivo with high spatial and temporal precision, opening powerful approaches to dissecting neural circuits and to developing neuroprosthetics and therapies for neurological disorders. Neural probes employ conventionally an optically delivered stimulation, commonly via a grating coupler or...
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ANZOS | Photonics and Optics (ANZCOP)Invited talk
Development of stand-alone photonic integrated circuits (PICs) has been limited by lack of integration of active components such as lasers and amplifiers. Heterogeneous integration of group III-V quantum well (QW) or quantum dot active layers with passive PICs paves the way toward the generation, amplification, manipulation, and detection of coherent signals on a photonic chip. The demand from...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Artificial neural networks increasingly rely on large-scale tensor operations that dominate inference latency and energy consumption. Photonic computing offers a promising route toward high-speed acceleration by performing linear algebra directly in the optical domain. Here, we present an integrated, reconfigurable photonic tensor processor for deep neural network inference. The system...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Implanted high spin donors in silicon are a promising platform for quantum computing due to their long coherence times, combability with traditional semiconductor fabrication, and ability to encode cat states for quantum error correction. To date, the stochastic nature of ion implantation has limited the ability to scale such systems beyond single qudits. In the future, this platform will...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
State-of-the-art photonic neural networks (PNNs) demonstrate ultrafast processing speeds and broadband operation by exploiting the intrinsic properties of light. However, conventional integrated optical matrix–vector multiplication (MVM) schemes rely on lossy coupling schemes and off-chip nonlinearities, which significantly reduce the overall energy efficiency and scalability of the system. To...
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AIP | General Relativity and Gravitation (ASGRG)Contributed Oral
According to Einstein’s general theory of relativity, photons—though massless—are influenced by gravitational fields because gravity acts not as a force in the Newtonian sense but as a manifestation of spacetime curvature. In this framework, a photon follows a null geodesic, meaning its path bends when passing near massive objects due to the warping of spacetime. This leads to several key...
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AIP | Solar Terrestrial and Space Physics (STSP)Contributed Oral
Inspired by cloud-to-ground lightning strikes on the early Earth, we designed a plasma setup to mimic lightning-induced reactions at gas-liquid-solid interfaces, starting from simple and abundant reagents, such as N2 and CO2 in the air, inorganic minerals commonly found in rocks, and water. Plasma electrochemical reactions at air-water-ground interfaces lead to remarkable yields, with up to 40...
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ANZOS | Photonics and Optics (ANZCOP)Poster
Cell functionality is an active area of research, but many challenges arise due to the complexity of the processes involved. While techniques that provide information about the mechanical properties and/or dynamics of cells exist, they often rely on single point measurements or have limited acquisition speed. To overcome these limitations, I introduce the Rheoscat microscope. This system uses...
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AIP | Condensed Matter & Materials (CMM)Poster
We systematically investigated crystal-field (CF) excitations of Kramers ($Nd^{3+}$, $Er^{3+}$, $Yb^{3+}$) and non-Kramers ($Pr^{3+}$, $Ho^{3+}$) rare-earth ions in $REFeO_3$ using optimized CF simulations. Internal magnetic fields from the $Fe^{3+}$ and $RE^{3+}$ sublattices split the ground-state doublets of all Kramers ions, generating low-energy excitations around 1 meV. In non-Kramers...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
It is well established that nuclear fission (the splitting of atomic nuclei) is strongly influenced by the quantum mechanical structure of the nucleus, determined by its constituent protons and neutrons. Nascent fission fragments with large energy gaps between nuclear states are more stable and therefore drive fission towards these configurations. An open question in nuclear fission is: why do...
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A thermoradiative diode (TRD) is a low-bandgap optoelectronic device that generates power through thermal emission to a colder environment. Its operation can be explained with a simple detailed balance model, where in an ideal device, current is given by the difference between emitted and absorbed photons. When more photons are emitted than absorbed from the cold environment, the device...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Metasurfaces offer unprecedented control over light-matter interactions at the nanoscale and have emerged as a promising platform for nonlinear and quantum photonic applications [1]. Particularly, metasurfaces optimised for spontaneous parametric down-conversion (SPDC) serve as compact and highly customisable sources of entangled photon pairs [2]. However, it remains challenging to identify...
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Daniel Tobar (The University of Western Australia)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
The performance of soft contact lenses is strongly linked to their hydration dynamics; however, non-contact measurement of hydration in thin hydrated materials remains challenging. Terahertz time-domain spectroscopy (THz-TDS) is highly sensitive to the dielectric relaxation of water, making it a promising tool for probing hydration-dependent changes in soft polymeric materials. However,...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Integrated photonic technologies provide a scalable route towards high-density neural interfaces capable of delivering engineered light fields for neuron stimulation. Compared with conventional fibre-based and LED-based approaches, integrated photonic circuits offer compact form factors, improved optical routing, reduced power consumption, and the ability to address large arrays of...
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AIP | Condensed Matter & Materials (CMM)Poster
Abstract
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Organic donor-accepter nanoparticles are promising photocatalysts for hydrogen evolution. Their performance is determined not only by the donor and accepter materials, but also by the composition of the nanoparticles surface, where the photocatalytic reactions occur. The distribution of donor and acceptor materials at the surface, together with presence of surfactant molecules, can... -
AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
Nuclear fission, wherein one nucleus splits into two fragments, is one of the most complex processes in nuclear physics.
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The fissioning nucleus can be visualised as a series of nuclear shape evolution following a trajectory on the topography of the potential energy surface.
Various fission outcomes arise starting from the same compact configuration, due to features on the multidimensional... -
AIP | Condensed Matter & Materials (CMM)Contributed Oral
With all the right properties for strength, stability and safety, the poly-aryl-ether-ketones (PAEKs) are becoming champion polymers that have opened opportunities for working with the human body to repair, support and heal. The discovery of how to form and shape them with laser sintering methods and provide them with the right surface chemistry using ionised gases has been a success story...
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Philipp Reineck (RMIT University)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
The nitrogen-vacancy (NV) center in diamond exists in different charge states with distinct photoluminescence properties, which are sensitive to the nanoscale electrochemical environment. Hence, the NV charge state is emerging as a powerful all-optical platform for nanoscale sensing and imaging. Although significant progress has been made in engineering near-surface NV centers in bulk diamond,...
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Xinkai Sun (School of Physics, The University of Sydney)AIP | Condensed Matter & Materials (CMM)Contributed Oral
Nanoscale thermodynamics governs how ions move through disordered electrolytes, yet connecting this atomistic-scale behaviour to macroscopic, experimentally observable transport remains a central challenge for developing next-generation energy storage technologies such as batteries. Predicting how ions navigate a landscape shaped by microscopic fluctuations in the local thermodynamic...
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Lucas English (University of Sydney)AIP | Quantum Science and Technology (QST)Contributed Oral
Utility-scale quantum computers require quantum error correcting codes with large numbers of physical qubits to achieve sufficiently low logical error rates. The performance of quantum error correction (QEC) is generally predicted through large-scale numerical simulations, used to estimate thresholds, finite-size scaling, and exponential suppression of logical errors below threshold. The...
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645. Isospin Breaking Effects in the Vector and Axial-Vector Charges of the Nucleon from Lattice QCDAIP | Nuclear and Particle Physics (NUPP)Poster
The vector and axial-vector charges of the nucleon ($g_V$ and $g_A$) play a pivotal role in the internal structure of the nucleon and the weak force processes it undergoes—such as superallowed nuclear beta decay and free neutron decay. Current experimental measurements of the neutron lifetime exhibit a tension from beam-based and bottle-based experiments. Beam-based experiments measure the...
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AIP | Condensed Matter & Materials (CMM)Invited talk
The natural mineral clinoatacamite, Cu2Cl(OH)3, has been discussed as a frustrated quantum spin system. Electronic structure calculations have shown that its monoclinic crystal symmetry supports a ground state magnetic structure where antiferromagnetic Kagome layers are coupled ferromagnetically [1]. A previous neutron diffraction study on deuterated clinoatacamite powder revealed magnetic...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Spectroscopy of gasses is a key detection technique for identifying both the type and concentration of gas. Gas absorption lines are typically on the order of ~1 GHz (8 pm) wide, and so detecting these reliably requires precision optical instrumentation. Recent progress in hollow-core optical fibers (HCFs), which present the lowest-loss waveguides for light propagation at attenuations below...
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Gleb Chizhik (Monash University (AU))AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
The bottom and charm quarks are the heaviest quarks which can build hadrons and they have several unique characteristics. Due to their heavy mass, production occur in the hard scattering or the early stages of the parton evolution of a proton-proton collision. Heavy-light meson production (like a $B^+$) is dominated by the heavy parent radiating gluons which form quark pairs, or by additional...
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Silicon carbide (SiC) has been at the heart of the commercial power semiconductor industry for over two decades, owing to its larger breakdown electric field and superior thermal conductivity compared to silicon. In that time, there has been significant research and development into optimizing these devices. The main SiC rectifier is the SiC Schottky diode, which is formed simply using an...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Label-free optical microscopy employs nondestructive approaches to visualize biomedical samples. It utilizes endogenous intrinsic signals rather than specific exogenous markers or genetic modifications, which may perturb the natural biological processes, dynamics, and responses of live cells. A major challenge in optical microscopy of live cells is achieving affordable, label-free,...
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ANZOS | Quantum and Atom Optics (ANZCOP QAO)Contributed Oral
Potassium-39 has several broad Feshbach resonances that enable the interatomic interaction to be precisely tuned over a wide range of values. In recent years the |1, -1> Feshbach resonance at 33.6 G has been widely used to create 39K BECs because of its convenience, especially in experiments conducted in space.
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We have found that the position of the 33.6 G Feshbach resonance can shift by as... -
Evan Hall (Massachusetts Institute of Technology)AIP | Quantum Science and Technology (QST)Poster
Laser frequency stabilisation with coating-free monolithic optical reference cavities
Optical reference cavities are capable of frequency-stabilising laser light down to the level set by fundamental quantum-mechanical and thermodynamic limits, with wide application in fundamental and applied physics. Today, many of the most frequency-stable reference cavities are limited by the Brownian...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
In-vitro cell studies are fast becoming the preferred technique for developing pharmaceuticals, patient specific cell therapies and fundamental biological understandings, avoiding invasive and expensive animal models. To meet the demand for in-vitro models, there is an increasing need for cell culture platforms that support multimodal characterisation, combining optical imaging with...
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Igor Morozov (Macquarie University, Australia)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Inertial fusion energy (IFE) seeks to generate power through the repeated thermonuclear burn of small deuterium–tritium (DT) targets compressed and heated by intense, pulsed drivers. In laser-driven IFE, nanosecond pulses delivering megajoule-scale energy must ultimately operate at several shots per second with high wall-plug efficiency, precise pulse shaping, broad spectral bandwidth,...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Magnetic-field sensing provides a non-invasive way to probe currents, spins and magnetic materials. Quantum magnetic sensors are attractive for this task because atomic-scale spin systems can convert weak magnetic field changes into optical signals with high spatial resolution. A central challenge is that conventional optically detected spin sensors often rely on small fluorescence-contrast...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Non-Markovian dynamics is a practically relevant feature of open quantum systems and can significantly influence the behaviour of noisy quantum devices. However, its characterization typically requires full multi-time process tomography, which is experimentally and computationally expensive, and, therefore, difficult to use as a routine diagnostic tool. In this work, we develop a resource...
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Jonas Freiheit (RMIT University)AIP | Condensed Matter & Materials (CMM)Contributed Oral
Quantum Reservoir Computing (QRC) is a quantum machine-learning framework that exploits the dynamics of quantum systems as a fixed reservoir to process time-dependent input signals, with learning confined to a classical readout layer. This makes QRC efficient to train and well-suited for real-time prediction[ [Fuji2017][1], [Nakajima2021][2], [Pena2023] ][3]. In this work, we investigate a...
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AIP | Physics Education (PEG)Contributed Oral
Multiple external representations (MERs) are widely used for concept learning in physics education. The concreteness fading (CF) framework posits that instruction should start with more concrete representations and proceed stepwise to more idealised ones. While supported in mathematics, evidence in physics remains mixed.
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Across three experimental classroom studies in advanced upper secondary... -
AIP | Physics Education (PEG)Contributed Oral
Simulations offer an accessible and visual way for learners to engage with concepts and ideas that are complex or difficult to visualise. Spaceflight lends itself well to simulation, as the construction, behaviour, and dynamics of spacecraft cannot be readily reproduced in a classroom or physical laboratory setting. Spaceflight simulations allow learners to assemble and launch vehicles with...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesPoster
Vacuum electronic devices offer unique advantages, including ballistic electron transport, high-frequency operation, and robustness under extreme environments. However, their practical implementation in miniaturized systems is often limited by high operating voltages and the need for complex strategies to control electron emission. Recently, light-assisted field emission has emerged as a...
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AIP | Physics Education (PEG)Contributed Oral
Long-term declines in school physics participation, flatlining enrolments in university physics degrees and significant gender gaps all signal that we need new solutions if we’re going to meet Australia’s projected need for 150,000 engineers by 2036.
But Australia is not the only country facing this problem.
In the US, the need for a future workforce is also urgent. For example, the...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
The discovery of optically driven magnetization control has revolutionized spintronics, introducing a ground breaking scientific paradigm that harnesses light-induced strain to manipulate magnetic order. This contactless and energy-efficient approach utilizes photostriction light induced strain generated in ferroelectric materials through the combined effects of the bulk photovoltaic response...
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AIP | Quantum Science and Technology (QST)Poster
Controlling charge and spin transport in single-molecule junctions is a central goal of molecular electronics. An external optical field is attractive as a transport control strategy: it is fast, reversible, and carries its own internal degree of freedom from the handedness of polarisation. Circularly polarised light (CPL) is particularly compelling because it breaks time-reversal symmetry...
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AIP | Quantum Science and Technology (QST)Poster
Photonic W states are a class of multipartite entangled states with potential applications in quantum communication, quantum networking, and distributed quantum information processing [1]. We theoretically investigate the generation of a heralded dual-rail encoded three-photon photonic W state using a linear optical circuit with six photons in nine modes, where three photons are detected as...
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Will Davis (Macquarie University)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Single-longitudinal-mode (SLM) Raman lasers are emerging as promising light sources that combine very low frequency noise with the potential for watt-level output powers, making them attractive for quantum applications. Previous Raman systems from our group have demonstrated intrinsic linewidths down to the hertz level, with measurements limited by instrument noise. However, such...
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Hugo Stackhouse (The University of Sydney)AIP | Quantum Science and Technology (QST)Poster
Tensor networks are well known for their ability to efficiently model dynamics of highly complex systems, from correlations in many-body quantum systems to rich structure in real-world machine-learning datasets. A key challenge of applying tensor-network techniques to quantum optics is that many physically interesting systems are open, and the standard tensor network standard compression...
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Dr Toby MitchellANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Integrated optical frequency combs have potential to be highly deployable due to their size and robustness. However, this potential can only be fully realised if these qualities can be paired with reliability and remote operation. In this work we present a ‘palm’ state soliton crystal microcomb pumped by a 1569.1 nm laser amplified to 1.2 W. The repetition frequency of the soliton crystal was...
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Igor Samsonov (UNSW)AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
Exchange of two neutrinos and other light fermions generates a parity-violating dispersion interaction between electrons and quarks. Although the long-range part of this interaction scales as $G_F/r^5$, its highly singular short-distance behaviour produces a correction of order $G_F^2 M_Z^2\sim \alpha G_F$, comparable to standard electroweak radiative corrections. This makes the effect...
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AIP | Theoretical Physics (TPG)Poster
The continuous-variable (CV) quantum key distribution (QKD) has attracted considerable attention in recent years due to its high key-rate performance, compatibility with telecom-wavelength infrastructure, and cost-effective use of photodetectors. However, CV QKD is sensitive to transmission loss and noise, limiting its operation length to the metropolitan level. A recent approach of optical...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Quantum imaging with undetected photons (QIUP) enables image formation using photons that are never directly measured, decoupling illumination and detection wavelengths. Indistinguishable photon-pair generation pathways interfere coherently, enabling information carried by the undetected mid-infrared idler field to be transferred to the detected near-infrared signal field via phase- and...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Low-frequency electric field detection remains a significant challenge for conventional antenna-based sensors due to their large size and limited sensitivity. Rydberg atom–based vapor-cell sensors offer a promising alternative for quasi-DC electric field sensing; however, their performance is constrained by electric-field screening arising from charge accumulation within the cell. I will be...
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1AIP | Astronomy (ASTRO)Poster
Transient astronomy is a growing field. As stable objects are well studied due to historical development of infrastructure and data collection techniques for long exposure, high resolution and stable targets, while the tools for short time scales are far less common and now in very high demand. With the introduction of the Vera Rubin observatory, combined with other wide survey tools, the...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum communication exploits the properties of quantum states to enable secure information transfer. Over the past several decades, quantum key distribution has become the dominant approach to quantum-secure communication, where a shared secret key is first established before encrypted communication takes place. An alternative approach is direct quantum communication, in which the message...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Multifrequency terahertz (THz) waves with high spectral purity are of pivotal importance to advanced spectroscopy, imaging, and telecommunications. Traditional approaches for producing multifrequency THz waves and THz frequency combs rely on complex setups or sophisticated device structures and are usually limited in bandwidth and efficiency, especially at the spectral range between 0.5 and...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Fractional derivatives, particularly fractional Laplacian operators, have attracted growing interest across physics, mathematics, and engineering [1]. In nonlinear optics, they provide a route to generalize the conventional nonlinear Schrödinger equation by replacing the conventional quadratic dispersion with a fractional, nonlocal dispersion law, described by the operator...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum computation must be performed in a fault-tolerant manner to be useful in practice. Recent progress has established quantum error-correcting codes with sparse connectivity requirements and constant qubit overhead suitable for quantum memory. However, existing schemes that include fault-tolerant logical measurement on such quantum memories do not always achieve low qubit overhead. Here...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
The chemical properties of microcalcifications within the body have been shown to provide a keen insight into the disease state of various cancers.[1] In their invasive form, these microcalcifications exist predominantly as the common calcium phosphate mineral hydroxyapatite. Being a biomineral, these apatites readily incorporate amounts of common biological ions which also have been shown in...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum machine learning seeks to deliver a decisive computational advantage in data processing by evaluating specific functions of quantum states that remain classically intractable to compute. However, for this advantage to become viable, it is essential to bypass the prohibitively costly characterisation, or full state tomography, of individual data instances. Instead, we must favour the...
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Carolyn Wood (The University of Queensland)AIP | Quantum Science and Technology (QST)Contributed Oral
The direction of time's arrow is easily discernible by us in the real, macroscopic world. In the microscopic regime, on the other hand, the dynamics of physical systems are time reversible, and fluctuations prevent us from determining the arrow of time with anything more than probabilities. It has been shown that a machine learning algorithm can discern the arrow of time even in the...
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AIP | Solar Terrestrial and Space Physics (STSP)Contributed Oral
One of the leading mechanisms for explaining the high temperature of the Sun’s corona is based on Parker’s conjecture that a sufficiently complex field will develop near-singular current sheets, leading to the onset of rapid magnetic reconnection and energy conversion. This topological dissipation mechanism remains a matter of debate, and is a key ingredient in the nanoflare model for coronal...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
New classes of molecular magnetic materials have emerged from developments in on-surface synthesis. The continued development, profound understanding, and potential application of these materials require precise characterization of their magnetic properties. In recent years, scanning probe microscopy (SPM) using nickelocene-functionalized probes have emerged as a new atomic-scale magnetic...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Recent developments in superconducting and quantum computing have highlighted the need for cryogenic-compatible memory technologies [1]. The lanthanide nitrides (LNs) and their solid solutions (L,L’)N are tunable magnetic semiconductors well-suited to cryogenic applications. The magnetism of (L,L’)Ns is primarily dictated by the choice of the lanthanides L and L’, while the electronic...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Coherent heterodyne detection methods present an opportunity for improved sensitivity in quantum sensing. Four wave mixing is a commonly used spectroscopic technique, with limited previous applications in magnetometry.
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Using alkali vapour in a double lambda configuration we perform four wave mixing over the hyperfine states. By beating the probe and generated conjugate beams together at a... -
Kimberley Dennis (The University of Sydney)AIP | Physics Education (PEG)Poster
Mathematics is deeply entwined with the learning and practice of physics (1), yet mathematics underpreparedness is a common challenge not just for physics, but for many tertiary science courses (2). It contributes to attrition from physics majors (3), poor experiences and loss of confidence. Furthermore, the ability to apply mathematical knowledge to physics contexts is non-trivial for...
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AIP | Physics Education (PEG)Poster
Aversion to mathematics is a recognised and widespread problem that affects students’ confidence, participation, and achievement. Following a review of the literature on mathematics anxiety, we developed an educational program to test the hypothesis that introducing a broader range of mathematical skills relevant to modern science at an early age (7–14 years) can improve students’ attitudes...
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Giacomo Morgante (Monash University)AIP | Nuclear and Particle Physics (NUPP)Poster
An accurate accounting of QED radiation in hadron decays is key for high precision measurements at colliders, particularly for particle selection and reconstruction. We present a general framework for the description of QED antenna parton showers in decays of hadrons. Additionally, we incorporate corrections derived from exact tree-level matrix elements for decays involving (pseudo)scalar...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Levitated macroscopic particles exhibiting quantum mechanical effects are garnering increased attention as a means for precision sensing and testing quantum mechanics. Defects in diamond, such as the nitrogen-vacancy (NV) centre possess optically-addressable spins with long coherence times at room temperature and offer an intriguing system to examine quantum spin dynamics coupled to a...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Wavelength modulation spectroscopy (WMS), employing a 1654-nm tunable diode laser and an annular polygon-reflector multi-pass optical cell, has been developed to study enteric emissions of methane (a key greenhouse gas) from ruminant livestock. This molecule-specific technique can quantitatively measure sub-parts-per-million concentrations of methane in ambient air at atmospheric pressure. A...
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ANZOS | Quantum Computing and Quantum Information (ANZCOP QCQI)Contributed Oral
Quantum harmonic oscillators play a crucial role across quantum computation, simulation, and sensing. Across all of these applications, a common and essential prerequisite is the ability to extract information from the oscillator whether to read out the outcome of a computation, to measure observables of a simulated system, or to obtain a sensing signal. While existing readout methods for...
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Prof. Nicole Bell (The University of Melbourne)AIP | Nuclear and Particle Physics (NUPP)Invited talk
We propose a new approach to measuring the CP-violating phase in neutrino mixing using atmospheric neutrinos. This involves an up-down flux ratio for sub-GeV atmospheric neutrinos. For Hyper-Kamiokande –– the first experiment with sufficient atmospheric-neutrino statistics in this energy range –– our approach can surpass the sensitivity of accelerator long-baseline experiments near $\delta =...
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Angus King (The University of Sydney)AIP | Quantum Science and Technology (QST)Contributed Oral
Levitated optomechanics provides a promising platform for precision sensing and quantum experiments with massive mesoscopic objects. The performance of optically levitated nanoparticle systems is ultimately governed by the light–matter interaction. Increasing the strength of this interaction leads to higher trap stiffness and improved measurement efficiency, the latter being particularly...
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Jianjun Chen (Nanyang Technological University)AIP | Quantum Science and Technology (QST)Contributed Oral
Predicting a stochastic process requires memory, and the minimal memory that a model needs — its statistical complexity — can be reduced by using quantum rather than classical states. We focus on a concrete operational task: the decoding of convolutional codes over noisy channels. The theoretically optimal decoder tracks a continuous belief state, making its exact classical model...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesPoster
Actively reconfigurable terahertz (THz) spectral components are required for adaptive spectroscopy, imaging, and wireless systems. However, achieving transmission filtering with substantial tunability in a compact planar architecture remains challenging. This work presents a microelectromechanical system (MEMS) reconfigurable bilayer THz metasurface bandpass filter based on the controlled...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Quantitative phase imaging is the measurement of spatially varying phase distributions induced by scattering from a sample, permitting the observation of transparent objects and metrology. Conventional approaches to quantitative phase imaging systems typically involve bulky optical components and large propagation distances. The expanded functionality provided by metasurface optical...
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Qi Fang (The University of Western Australia)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Cancer remains a leading cause of global mortality, with surgical resection serving as the primary curative-intent treatment for early-stage solid tumours. During these interventions, surgeons routinely rely on manual palpation to delineate tumour margins, based on distinct mechanical contrast between rigid malignant lesions and more compliant surrounding stroma. Despite its ubiquity, manual...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
The ANU positron group has been investigating metastable excitation of atoms and molecules by electron and positron impact, with a current focus on positron-impact excitation of noble gases$^{[1]}$. Excitation of low-lying metastable states in these systems typically requires an electron spin-flip. In electron collisions, such transitions can proceed via the exchange or spin-orbit...
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Ramona Bedford (Monash University)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Optical skyrmions are topological structures that have attracted significant interest due to their robustness and versatility across a wide range of optical platforms. In quantum optics, they have emerged as a promising resource for robust quantum information encoding. However, existing methods for generating optical skyrmions typically rely on bulky optical systems and are generally limited...
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Saniya Shinde (ARC Center of Excellence for Transformative Meta-Optical Systems (TMOS), Department of Electronic Materials Engineering, Research School of Physics, Australian National University, Canberra, ACT 2601, Australia; Institute of Applied Physics, Abbe Center of Photonics, Friedrich Schiller University Jena, Albert-Einstein-Straße 15, 07745 Jena, Germany)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Multiparty quantum networks require distribution of entanglement amongst various users. Currently, such networks operating with photons over free space require bulky optical components with interferometric stability for entanglement multiplexing [1]. For a broader use of such technologies, there is a need to integrate the functionality into a compact integrated platform. Recently, linear...
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Aidan Dugdale (The University of Sydney)AIP | Quantum Science and Technology (QST)Poster
Laboratory environments emanate acoustic noise from a variety of sources that can affect the amplitude and frequency stability of optical elements (especially lasers) in high-resolution spectroscopy experiments. Examples of noise sources include talking, doors closing, or from lab-specific sources such as the pulse tube of a dilution refrigerator. Here, I will present a template for the...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
High-quality terahertz resonators are key enablers of enhanced light–matter interaction in the terahertz domain. This enhancement underpins improved sensitivity and reduced detection limits in sensing and spectroscopy, as well as more efficient nonlinear mixing between optical and terahertz signals for telecommunications. However, the design of high‑Q terahertz resonators remains largely...
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ANZOS | Photonics and Optics (ANZCOP)Poster
Micro-transfer printing thin-film lithium niobate onto SiN photonic chips
Photonic integrated circuits (PICs) are poised to drive the intelligent future, much like microelectronics have powered the information era over the past few decades. This potential was underscored by Nvidia's March 2025 announcement of Spectrum-X Photonics, a co-packaged optics networking switch designed to scale AI...
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Lothar Ratschbacher (Institute for Photonics and Advanced Sensing (IPAS), Adelaide University, Adelaide, SA, 5005, Australia)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
LiDAR sensors with fast sample rates and precise spatial resolution are an important enabling technology for autonomous driving and unmanned aerial vehicles. With ubiquitous use of the technology, robustness to temporal and spectral congestion is becoming a key criterion for LiDAR systems. FMCW LiDAR using chaotic micro-combs has previously been shown to be a promising approach for accurate...
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Mr Chenkai Jiang (School of Chemistry, The University of Sydeny)AIP | Condensed Matter & Materials (CMM)Contributed Oral
Lightning has long been considered a powerful energy source for prebiotic chemistry on the early Earth. Recent studies show that lightning-induced plasma electrochemistry can activate inert starting materials, such as a prebiotic atmosphere, water, and rocks, into more reactive chemical feedstocks relevant to the origin of life.\textsuperscript{1} Inspired by this scenario, we explore the...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Optical coherence tomography (OCT) has been widely utilised for biomedical imaging since its early clinical use for retinal microstructural imaging[1]. It has subsequently become a versatile to a broad range of applications, such as cardiology and oncology[2]. This widespread adoption is largely due to OCT’s ability to provide non-invasive, depth-resolved images of tissue structures. However,...
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Jack Morrow (The University of Queensland)
The energy levels of muonic atoms are highly sensitive to the nuclear charge distribution, which makes them useful probes of the nuclear charge radius. To extract the rms charge radius from the emitted X-rays, it is common to assume that the charge distribution $\rho(r)$ is given by the 2-parameter Fermi distribution. However, it is acknowledged in the literature that this simplistic...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Semiconductor lasers are compact, efficient light sources widely used in optical communications, and their sensitivity to external feedback also makes them rich systems for studying nonlinear dynamics. The Lang–Kobayashi (LK) equations remain the standard framework for modelling feedback from a regular mirror, but many modern systems employ fibre Bragg gratings (FBGs) for their precise...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum photonic circuits are becoming increasingly complex as the field moves from isolated proof-of-principle demonstrations toward real-world, application-grade architectures. This complexity is not only a question of scale, but increasingly arises from the co-integration of components governed by qualitatively different physical mechanisms, including passive interferometric networks,...
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AIP | Solar Terrestrial and Space Physics (STSP)Contributed Oral
One of the challenges of orbital prediction calculations is the propagation of uncertainty. A numerical modelling technique is presented that combines the low computational overhead and continuity of a low-fidelity Keplerian Monte Carlo simulation with the accuracy of a high-fidelity orbital dynamics simulation at key points.
Effective decision making in space domain awareness (SDA) relies...
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ANZOS | Quantum and Atom Optics (ANZCOP QAO)Poster
Momentum correlations within a Bose-Fermi mixture are affected by the different statistical properties of bosons and fermions, making their theoretical calculation non-trivial. By bringing $^3$He and $^4$He to degeneracy using a combination of sympathetic, evaporative and laser cooling techniques as outlined in [1,2], we can produce a Bose-Fermi mixture and investigate the interaction...
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Mr Yiyang Cui (Department of Electrical and electronic engineering, University of Melbourne)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Wavelength-selective thermal emitters (WS-EMs) are of great interest as cost-effective light sources in the mid-infrared. WS-EMs can be achieved by Tamm plasmon polariton (TPPs) devices, which consist of a distributed Bragg reflector (DBR) on metal films. It has been shown that a TPP emitter can produce narrowband mid-IR emission [1]. However, in previous works, each device generally produced...
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AIP | Condensed Matter & Materials (CMM)Poster
Multi-dimensional coherent spectroscopy (MDCS) goes beyond standard linear-response probes and provides a powerful tool for investigating correlations between quasiparticles such as excitons (bound electron-hole pairs). Here we present a microscopic theory of MDCS that accounts for the delocalized nature of excitons in two-dimensional semiconductors. In contrast to the more phenomenological...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Preserving quantum coherence in the presence of environmental noise is a central challenge for quantum technologies. Noise mitigation using spectator qubits (SQs) has recently emerged as a promising approach, enabling indirect probing of the noise without disturbing the data qubit (DQ). However, existing analyses are largely restricted to two-level fluctuator models, typically described by...
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Mai Okumura (Chuo University)COMMAD - Optoelectronic and Microelectronic Materials and DevicesPoster
The development of high-performance Terahertz–Infrared (THz–IR) sensors is essential for next-generation non-destructive inspection. Photo-thermoelectric (PTE) sensors utilizing carbon nanotubes (CNTs) are promising due to their broadband response. However, achieving peak sensitivity requires matching the material's properties to the specific eigenfrequency of the inspection target. The...
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Sarah E. Dean (ARC Centre of Excellence for Transformative Meta-Optical Systems, Department of Electronic Materials Engineering, Research School of Physics, The Australian National University)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Polarisation imaging is used in remote sensing to capture enhanced information in a scene. Multispectral polarisation imaging, in particular, has agricultural applications such as crop classification and vegetation health monitoring$~$[1]. Drones, small satellites, and other lightweight unmanned aerial vehicles are accessible platforms for remote sensing, but have size and weight limitations...
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Lewis Hill (Max Planck Institute for the Science of Light)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Surface nanoscale axial photonic resonators (SNAPRs) provide a unique nonlinear photonics platform in which nanoscale effective-radius variations create axially confined whispering-gallery modes while preserving ultra-high optical quality factors. Theoretical studies have predicted that this axial confinement can fundamentally alter frequency-comb generation dynamics, while recent experiments...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Atom interferometers have emerged as a promising pathway for the development of compact, high-performance inertial sensors, and are now transitioning from controlled laboratory environments into robust, field-deployable devices. A critical challenge is the effect of imperfect interferometer closure due to environmental disturbances, such as rotations of the device, which reduce the visibility...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
Complex systems exhibit macroscopic behaviors that emerge from the coordinated interactions of their individual components. Understanding the microscopic origins of these emergent properties remains a significant challenge, especially in less-understood systems, due to the absence of a generalized framework for identifying the governing degrees of freedom. The multiscale complexity formalism,...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Berry phases are geometric phases acquired by a system carried adiabatically around a closed loop, fixed entirely by the loop's geometry, as in the Aharonov-Bohm effect, where a charged particle's wavefunction shifts measurably on encircling a magnetic flux it never samples. We realise this physics in a tabletop platform: a free-space microwave cavity formed by twisting a triangular waveguide...
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Jordan MckeeAIP | Nuclear and Particle Physics (NUPP)Contributed Oral
Precision measurements of superallowed nuclear β decays provide an important test of the Standard Model through the determination of $V_{ud}$. Interpreting these measurements requires an accurate understanding of the effects of the strong interaction on electroweak radiative corrections at low momentum transfer. In this regime, perturbative methods are no longer applicable, motivating...
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AIP | Condensed Matter & Materials (CMM)Poster
Controlling the optical response of two-dimensional semiconductors through strain has become an important strategy for improving their optoelectronic performance. Here, we report a significant enhancement of excitonic photoluminescence in monolayer MoS₂ arising from nano-needle-like oxide protrusions that develop during a photo-oxidation-assisted exfoliation process. These structures appear...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesPoster
With semiconductors reaching their limits and unable to follow Moore’s Law, nanoscale vacuum channel devices are receiving significant attention as a potential alternative to next-generation electronics. This is due to their benefits of high-frequency operation, radiation hardness, wide range of thermal operation, and compatibility with CMOS fabrication techniques. While this technology has...
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545. Near-infrared optically addressable spins and single photon emission in hexagonal boron nitrideFatin Al Sadab (RMIT University)AIP | Quantum Science and Technology (QST)Contributed Oral
Optically addressable solid-state spins are an important platform for practical quantum technologies. The Van der Waals material hexagonal boron nitride (hBN) is a promising host because it contains a wide variety of optical emitters, but observations of addressable spins have thus far been sparse, and most emission occurs in the visible part of the spectrum. Recently, our team has reported...
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ANZOS | Quantum Computing and Quantum Information (ANZCOP QCQI)Contributed Oral
The Quantum Approximate Optimisation Algorithm (QAOA) tackles combinatorial optimisation problems by encoding their solutions into the ground state of an Ising Hamiltonian prepared by a $p$-level parameterised circuit, with the angles tuned classically. Parameter optimisation is widely regarded as a central bottleneck, and worst-case results showing that training QAOA is NP-hard are often read...
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Tony Yan (The Australian National University)AIP | Quantum Science and Technology (QST)Contributed Oral
Interference between multiple spontaneous parametric down-conversion sources produces phase-dependent two-photon coincidence fringes with no single-source analogue. In frustrated-interference and path-identity experiments, a coincidence channel can go dark through destructive interference between source amplitudes. In recent three- and four-source versions, Jiang et al., Nat. Commun. 2026...
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In June 2026, the Large Hadron Collider (LHC) at CERN was shutdown, bringing the curtain down on the highly successful Run 3 period of the machine which started in 2022. In this talk, I will survey some of the results already produced using these data from top physics, Higgs results and searches for physics beyond the Standard Model. By 2030, the LHC will be reimagined as the high-luminosity...
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ANZOS | Photonics and Optics (ANZCOP)Poster
We propose and experimentally demonstrate a bidirectional optical add/drop multiplexer for single-fiber bidirectional optical networks. The new structure of the symmetric single-fiber bidirectional optical add/drop multiplexer (SBOADM) is composed of a multi-port optical circulator and fiber Bragg gratings. The new symmetric SBOADM can add or drop channels in both directions and has...
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661. New Techniques to Identify Compound Nucleus Formation in Superheavy Element Synthesis ReactionsAIP | Nuclear and Particle Physics (NUPP)Contributed Oral
The formation of superheavy elements (atomic number Z $\geq$ 104) presents a valuable opportunity to expand our understanding of fundamental quantum and nuclear physics. At accelerator facilities, superheavy elements are synthesised by colliding two heavy ions with sufficient energy to overcome their mutual Coulomb repulsion. These nuclei may then undergo fusion (equilibrating in mass, energy,...
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AIP | Theoretical Physics (TPG)Poster
A simple, elegant theory of gravity that necessarily follows from revised perspectives on mass, light-speed and spacetime will be presented. It still has time changing with both movement and gravitational potential of massive objects, but “space” (distance) is not contracted. Lorentz invariance, as originally proposed, requires the length of objects to be reduced; not the length of empty...
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AIP | Physics Education (PEG)Contributed Oral
Every physics teacher knows the frustration: students sit through careful instruction on Newton's laws, yet persistently return to the same intuitive errors. A ball thrown upward "still has the throwing force inside it." A heavier truck "pushes harder" on a smaller car in a collision. For decades, these mistakes were treated as noise, unhelpful distractions on the path to correct Newtonian...
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Clare Kenyon (Monash University)AIP | Physics Education (PEG)Contributed Oral
Digital simulations are central to modern astronomy education, yet many tools used in undergraduate laboratories no longer meet contemporary pedagogical or technical standards. We present two newly developed, bespoke simulation environments designed to support foundational astronomy practicals: the Hertzsprung–Russell (HR) diagram activity and the Hubble–Redshift distance relation...
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ANZOS | Quantum and Atom Optics (ANZCOP QAO)Contributed Oral
While the fundamental limits to atomic clock stability resulting from measurement noise are by now well understood, the limits imposed by the feedback mechanism itself have received only a relatively fragmented treatment.
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Here we develop a general description of noise in atomic clocks that arises whenever the feedback is time dependent, i.e. in violation of the assumptions of linear time... -
AIP | Quantum Science and Technology (QST)Contributed Oral
Photonic loss is one of the key obstacles for optical quantum information science on the path towards quantum advantage in communication, computation, and measurement. Perfect quantum amplification of unknown quantum states is prohibited by the no-cloning theorem, leaving the community to search for practical methods to overcome the effects of loss on optical quantum states. Probabilistic...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Advancements in mapping lattice gauge theories to digital quantum computers have reached a stage where explicit compilation of the associated quantum circuits is possible. As an entry point to these compilation challenges, we describe the optimized quantum circuitry for simulating the real-time dynamics of SU(2) lattice gauge theory on a cube. Using a qudit-based quantum computer, where the...
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Ben Harper (University of Melbourne)AIP | Quantum Science and Technology (QST)Contributed Oral
Scalable realisation of quantum computing is reliant on the development of fault tolerant devices. Analysis of quantum error correction protocols typically considers incoherent noise models or noise-free syndrome measurements. While this is simple to simulate classically and straightforward to compute analytically, these simplifications are unable to capture the full dynamics of a noisy...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
We develop a scattering theory formalism and use it to predict that a resonantly driven atomic ensemble weakly coupled to an optical mode can generate light with non-Gaussian correlations. Our approach -- based on a perturbative diagrammatic expansion of multi-photon interactions -- shows that photon-photon interaction mediated by the emitters causes the transmitted light to have a...
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Dmitrii Murinov (Australian National University)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Non-Hermitian and topological photonics have jointly sparked recent interest in the manifestation of spectral degeneracies and polarisation defects for radiation control. Here we study several types of non-Hermitian metaphotonic structures that support both topological singularities in polarisation fields, such as C-points (points of purely circular polarisation), and spectral singularities,...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Non-Markovian effects are often significant when the system-environment coupling is not weak. We show that, within the framework of pure dephasing, the non-Markovianity displayed by a two-level system (TLS) can, in fact, be far more pronounced. To demonstrate that this is indeed the case, we consider a pure dephasing model where a collection of TLSs interacts with a common environment. We...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Chiral photonics enables control over the handedness of light and underpins applications ranging from optical communications and biochemical sensing to emerging quantum technologies. While most existing approaches focus on engineering strong linear optical activity, nonlinear chiral phenomena remain comparatively underexplored. Here, we demonstrate a fundamentally different route in which a...
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Dhruv Hariharan (University of Sydney)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Chiral photonics provides powerful routes for controlling the handedness of light, enabling unprecedented control over light-matter interactions and novel optical functionalities. Metasurfaces have emerged as a powerful platform for controlling chiral responses due to their design versatility and capacity for light manipulation on a sub-wavelength scale. In particular, recent works have...
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Lewis Hill (Max Planck Institute for the Science of Light)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Degenerate optical parametric oscillators (DOPOs) based on Kerr nonlinear microresonators have emerged as a promising platform for applications ranging from squeezed-light generation to photonic computing [1–3]. While significant progress has been made in understanding their steady-state operation, their nonlinear dynamical behaviour remains comparatively unexplored.
Here, we theoretically...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Chiral optical responses in metasurfaces are typically engineered through structural chirality or extrinsic symmetry breaking, while nonlinear circular dichroism is commonly viewed as a resonantly enhanced manifestation of an already chiral linear response. Here, we demonstrate a different mechanism: chirality induced solely by the nonlinear susceptibility tensor of an otherwise achiral...
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Thakur Giriraj Hiranandani (University of Queensland, Australia)AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
The rise of quantum technologies and low-energy tests of fundamental physics has intensified the demand for precise and reliable calculations of atomic systems. Among the key challenges in this field is the accurate treatment of interactions between bound electrons and external perturbations, such as from the hyperfine interaction and core polarisation. State-of-the-art theoretical approaches...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum computers offer the prospect of exponential speedups for solving large linear systems. Quantum linear systems algorithms (QLSAs) prepare a quantum state encoding the solution of a linear system $Ax = b$, but many practical applications also require the norm of the solution. For example, when modelling fluid flow by discretising the governing equations, the solution vector encodes the...
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Jordan Wise (University of Auckland)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Optical frequency combs (OFCs) are broadband coherent light sources composed of tens to thousands of equally spaced narrow spectral lines that have revolutionised many optical metrology tasks. OFCs have been demonstrated using a soliton circulating in an externally driven passive Kerr resonator. Standard cavity solitons are produced in optical cavities with anomalous dispersion and are...
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Describing localized particle wavefunctions as the superposition of quantum states of gravitational wells shows that interaction cross sections (Compton scattering etc.) can vary with the speed and position of the particle in the gravitational well (i.e. the functional form of the wavefunction). Significantly these wavepacket cross sections can be much reduced compared to those calculated in...
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AIP | Quantum Science and Technology (QST)Invited talk
Quantum chaos is often understood as the dynamics found in quantum systems that exhibit classical chaos in the large-system limit. Classically chaotic systems exhibit randomness resulting from divergent sensitivity to system parameters, making accurate simulation difficult. In quantum computing, algorithms like digital quantum simulations will only be useful when systems cannot be simulated...
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SABRE South is a rare-event physics experiment designed to test the long-standing annual modulation signal reported by the DAMA/LIBRA experiment. Both experiments use ultra-pure NaI(Tl) crystals operated in low-background detector environments. Unlike DAMA/LIBRA, SABRE South features an active liquid scintillator veto system surrounding the crystals, instrumented with photomultiplier tubes...
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ANZOS | Photonics and Optics (ANZCOP)Poster
Breast cancer-related lymphoedema is a chronic condition characterised by tissue swelling in the upper extremities, affecting approximately 20% of breast cancer patients following treatment [1]. This incurable disease arises when the lymphatic system is damaged and fails to maintain tissue fluid homeostasis by transporting excess interstitial fluid back to the bloodstream. Despite advances in...
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Metal-halide perovskites (MHPs) and “perovskite-inspired materials” (PIMs) have recently emerged as versatile materials for solar cells and photocatalytic applications. Ultrafast optical probes of photoconductivity dynamics are particularly useful here, uncovering the generation, localisation and ultimate recombination of charge carriers following photon absorption.
We examine charge...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Stochastic processes are everywhere -- weather, financial markets, traffic -- and simulating them faithfully requires sufficient memory of past observations to predict future behaviour. For processes with a long historical dependence, the memory requirement grows with complexity posing a hard barrier for classical simulators. Quantum simulators offer an alternative through encoding memory in...
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Justin Vella (University of Sydney)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
We simulate how modulating the properties of the centre core within a photonic lantern (PL) can greatly affect the mode selectivity of LP modes. Such knowledge can allow for the fabrication of a 2-in-1 monolothic device: a phase-preserving focal-plane wavefront sensor and an optimised science fibre. The novel variation, where a single mode is coupled into a chosen output fibre (and is...
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AIP | Quantum Science and Technology (QST)Poster
Hyperentanglement allows simultaneous quantum entanglement across multiple degrees of freedom (DOFs), scaling quantum technologies. Miniaturised devices offer higher biphoton pair-generation rates than bulk optics [1], while waveguide confinement minimises environmental decoherence [2]. However, shifting between distinct hyperentangled Bell states typically requires hardware modifications or...
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Alex Tritt (Monash University School of Physics & Astronomy)AIP | Quantum Science and Technology (QST)Contributed Oral
Numerically simulating coherent spin systems, such as atoms and defects, especially under highly time-dependent potentials, is incredibly resource-intensive. Nevertheless, such modelling can be greatly helpful for developing new quantum technology. We present a numerical simulator to accelerate the solving of the time-dependent Lindblad equation, where multiple time steps are calculated in...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Noise is a fundamental barrier to realising practical quantum advantage. While modern quantum hardware has made significant progress in mitigating standard, temporally uncorrelated noise, non-Markovian (NM) noise, typically arising from correlations between a system and its environment over multiple time steps, remains largely unaddressed. Standard benchmarking techniques, such as randomized...
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Prof. Deb Kane (Australian National University)COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Where within the coherence collapse regime of the key nonlinear laser system – the semiconductor laser with delayed optical feedback (SLDOF) – is the output at its most incoherent? This is a question that has evaded a full answer for decades but has finally been addressed. The answer and its understanding relies on 1. theoretical and numerical simulation (Opt. Lett. 51, 596–599413 (2026)),...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Digital quantum simulations (DQS) model complex quantum systems by discretising continuous, complex time evolution into sequences of implementable physical gates. For example, the quantum Rabi model has been simulated in circuit QED by interleaving Jaynes-Cummings (JC) interaction gates with fast single-qubit π-gates [1]. Achieving outsized computational complexity relative to processor...
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Bailey Hoare (Adelaide University)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Two-photon light-sheet fluorescence microscopy (2P-LSFM) enables rapid volumetric imaging with excellent optical sectioning and deep tissue penetration. Most 2P-LSFM systems use excitation sources at ~80 MHz; however, given the finite fluorescence lifetime of common fluorophores, lower repetition rates may improve signal generation by concentrating the same average power into fewer,...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Metal–dielectric–metal (MDM) plasmonic slot waveguides combine strong field confinement with slow-light effects, enabling enhanced light–matter interactions over short propagation lengths [1]. This makes MDM waveguides ideal platforms for exploiting materials with large Kerr nonlinearities but also high losses, such as epsilon-near-zero (ENZ) materials [2,3]. However, harnessing the nonlinear...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
Dissipative solitons and localized dissipative structures are ubiquitous, from optomechanics [1] to fluid dynamics [2], and even cosmological defects [3]. Dissipative solitons exist in systems far from equilibrium, where energy is continuously being lost and resupplied, which introduces unique properties distinct from analogous systems at equilibrium. We have engineered an optomechanical...
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ANZOS | Photonics and Optics (ANZCOP)Poster
Increasing awareness of the long-term risks posed to athletes who continue competing following a concussion has motivated a recent drive for reliable pitch-side diagnoses. One promising candidate is magnetoencephalography (MEG), the study of magnetic fields generated by electrical activity in the brain. These fields, of sub-picotesla magnitude and Hz-100Hz frequencies, can be examined by...
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The QCD axion remains one of the most compelling dark matter candidates, offering a simultaneous solution to the Strong CP problem and the nature of dark matter. Axion haloscopes search for this particle through its resonant conversion into microwave photons in a strong magnetic field, but most mature experimental sensitivity has so far been concentrated at GHz frequencies. The lower-frequency...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
We present a method for producing an array of fifty two ion-sensitive PEDOT:PSS organic electrochemical transistors on a glass coverslip, each featuring an integrated fluoropolymer microwell sealed with lipid bilayer into which membrane proteins can be inserted for simultaneous electrical and fluorescence microscopy studies. To demonstrate capability, we fill the microwells with an inner...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Diamond particles containing nitrogen-vacancy (NV) centers enable fiber-based magnetic field sensing by allowing optical excitation and collection of NV fluorescence within an optical fiber. Tellurite glass is a promising host for NV-diamond particles because its refractive index (~2.0) is closer to that of diamond (~2.4) than most oxide and fluoride glasses, thereby reducing scattering at the...
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Elizabeth Angstmann (University of New South Wales)AIP | Physics Education (PEG)Contributed Oral
Universities across Australia face shared educational challenges: declining student attendance since COVID, increasing pressure to design secure assessment in the age of large language models (LLMs), and students struggling with numerical skills. We do not claim to have solved these problems; rather, we see the AIP Congress as an opportunity to share our evolving approach and seek feedback...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum error-correcting codes allow for fault-tolerant quantum computation with noisy hardware, but they incur an overhead: multiple noisy qubits are required to encode and manipulate quantum information robustly. One way to reduce this overhead is to use biased-noise qubits, with structured noise channels dominated by a single error type, such as dephasing or erasure. These errors are much...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
The formation of new superheavy elements (atomic number Z > 103) is one of the major achievement of nuclear physics. The exceptionally rare outcome of two nuclei colliding and forming a new compound nucleus faces strong competition from orders-of-magnitude more likely processes, including quasifission. Quasifission involves the reseparation of the the system into two fragments after capture,...
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Gabriel Mccoy (Monash University)AIP | Nuclear and Particle Physics (NUPP)Poster
We present the R package
pandemoniumas a tool to investigate high-dimensional spaces using visual techniques to understand phenomena in physics and elsewhere.
Go to contribution pagepandemoniumis a high-dimensional cluster analysis tool. It is used to explore linked spaces such as the input and output spaces of a function or two types of measurements on the same observables where relationships are unknown,... -
Quantum tunnelling of a particle through a potential barrier, while widely understood in quantum mechanics, has yet to receive a systematic treatment in quantum field theory for particles coupled to an external background. We aim to determine QFT corrections to barrier tunnelling, which requires resummation of Feynman diagrams to all orders, as this interaction is non-perturbative in the...
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Yuzhen GuoAIP | Condensed Matter & Materials (CMM)Contributed Oral
Fully sp3 bonded carbon networks are highly promising candidates for wide-bandgap semiconductors, but their realization requires the complete elimination or passivation of residual sp2-hybridized atoms. The lack of long-range order makes the realization of 100% sp3 amorphous carbon a major challenge. While experiments have demonstrated that the structure of final carbon networks heavily depend...
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Ben Nel (University of Syndey)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Passive daytime radiative cooling structures can reach sub-ambient temperatures under direct sunlight by reflecting solar radiation while emitting heat through the atmospheric transparency window. Amidst rising global temperatures and the urgent need to slash greenhouse emissions, radiative cooling offers a promising sustainable complement to conventional cooling. Although designs are...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Atomic clocks already play a crucial role in the modern world: most famously forming the backbone of the global positioning system. Those atomic clocks operate at microwave frequencies, but newer atomic clocks operating at optical frequencies can offer substantially greater precision.
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A great deal of work has been done in recent years towards the miniaturisation of optical atomic clocks,... -
Kovi Rose (University of Sydney)AIP | Astronomy (ASTRO)Contributed Oral
I will present the discovery and characterisation of a novel, gravitationally-accreting white dwarf binary system, identified through optical spectroscopy and radio-wavelength observations. This system displays a short orbital period of ~1.3 hours, determined from Doppler shifts in Balmer emission lines, and exhibits unique radio emission characteristics.
We observed periodic bursts of...
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Joshua Collier (ICRAR - UWA)AIP | Astronomy (ASTRO)Contributed Oral
Classical imaging systems are limited by the size of their primary aperture and the wavelength of light being observed [1]. This diffraction limit reduces our capacity to make astronomical observations. Interferometry allows us to increase the size of our primary aperture through aperture synthesis, drastically improving our resolving capacity. The largest existing optical interferometer has a...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Optical microcombs are light sources that can offer a multitude of wavelength lines for many applications ranging from optical communications to spectroscopy. Thanks to their phase coherence, they could replace individual lasers at both transmitter and receiver sides, reducing complexity and easing signal processing since the wavelength lines share the same phase noise. The coherence can be...
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AIP | Quantum Science and Technology (QST)Poster
Squeezed states of light are a key resource for quantum-enhanced metrology, enabling quantum noise reduction below the vacuum limit in the measured quadrature. However, the measurement enhancement provided by squeezing is highly sensitive to optical loss, which irreversibly degrades the quantum state by coupling in vacuum fluctuations. This limitation becomes increasingly important at...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
There is a growing interest in engineering control over not only electronic, but also phononic properties for novel types of optoelectronic devices, improved thermal management, as well as energy harvesting. Selection of enhanced phonon modes can be achieved using Bragg style reflectors tuned to the acoustic properties of the materials used. Recently it has been shown that so called adiabatic...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
The term "soft phonon mode" was first introduced by Cochran in describing the lattice dynamical behaviour for certain ferroelectric crystals. Within the past forty years or so, the term has been applied, perhaps somewhat loosely, to describe almost any section of a phonon dispersion relation for which frequency decreases as temperature decreases. So the real relationship between "phonon...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Photoinduced Current Transient Spectroscopy (PICTS) is a technique developed to identify electrically-active charge traps in high-resistivity epitaxial substrates, where conventional capacitance-based methods are ineffective. [1] The ability to probe high-resistivity materials makes PICTS well-suited to the characterisation of silicon materials for quantum device applications. High-resistivity...
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AIP | Condensed Matter & Materials (CMM)Poster
Electrical detection of solid-state spins is attractive for quantum technologies, being readily chip-scalable while avoiding the small photon budgets of single emitters. Photoelectrically-detected magnetic resonance (PDMR) provides one such route [1], but carrier trapping by bulk impurities limits photocurrent, throttles bandwidth, and introduces charge transfer dynamics that complicate...
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ANZOS | Photonics and Optics (ANZCOP)Poster
Bangladesh is currently facing a growing energy crisis due to increasing electricity demand, dependence on fossil fuels, rising fuel costs, and environmental pollution. This study examines how the photoelectric effect can support renewable energy development and help reduce the energy shortage in Bangladesh. The photoelectric effect is the scientific principle behind solar photovoltaic...
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AIP | Quantum Science and Technology (QST)Poster
Innovations in technology resulting from the discovery and fabrication of 2-dimensional materials have furthered the advancement of technology to a level previously believed unattainable. The low spatial requirements and the unique phenomena that occur at such a reduced scale have provided numerous avenues for utilising these materials. Graphene has showcased its incredible versatility in...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesPoster
We investigate the linear and nonlinear photon-mixing response of nodal ring semimetals in the terahertz frequency regime. Using a theoretical framework, we demonstrate that these materials exhibit a remarkably strong third-order nonlinear current, which is significantly enhanced with increasing temperature and remains robust up to room temperature. The nonlinear response reaches a magnitude...
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AIP | Quantum Science and Technology (QST)Poster
Proposed by Landau in the 1940s [1], rotons are collective excitations in superfluid with relatively high momentum, compared to commonplace phonons. They are known to be responsible for the superfluid critical velocity, below which flow is unimpeded, illustrating their importance in superfluid behaviour. Optical generation of rotons was first achieved in 1969 using Raman scattering [2]. More...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Passive radiative cooling has emerged as an effective photonic strategy for sub-ambient thermal regulation by simultaneously minimizing solar absorption and enhancing thermal emission within the atmospheric window. However, developing scalable, mechanically robust, and manufacturable radiative cooling textiles remains a significant challenge.
In this work, we report a scalable surface...
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808. Photonic Integrated Lasers and Photonics for Atomic Quantum Sciences and Precision ApplicationsANZOS | Photonics and Optics (ANZCOP)Invited talk
Advances in atomic quantum sciences have enabled new fundamental measurements, communications and computation that existed only in theory just decades ago. Yet the underlying lasers and optical infrastructure still occupies laboratory tables and racks, are power consuming and not reliable. Photonic integration has the potential to move the laser systems and other photonics on chip. In this...
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AIP | Quantum Science and Technology (QST)Invited talk
Machine learning and quantum physics are two of the most transformative fields of science and technology. Their interaction is a rapidyl evolving field of research. Here, we introduce Quantum Optical Reservoir Computing (QORC)—a photonic accelerator for classical ML—in which a boson‑sampling interferometer acts as a fixed, high‑dimensional nonlinear quantum reservoir [1], enabling...
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ANZOS | THz and RF Photonics (ANZCOP THZRFPH)Invited talk
The terahertz band remains underused in quantum technology. Microwave and optical frequencies underpin most quantum computing, communication and sensing platforms, yet the THz spectrum is where rare-earth crystal-field transitions, phonon modes and low-energy spin excitations all reside has largely been treated as a region to be avoided rather than exploited. Progress depends less on new...
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Aman Desai (University of Adelaide (AU))AIP | Physics Education (PEG)Contributed Oral
We present PhysEduLLM, an LLM agent pipeline that generates interactive web-based physics simulations for educational use. Agents in this package turn a plain-text user request into parameters, and render it using a shared HTML and JavaScript template, and check the result against a given topic's checklist, ensuring physics consistencies before adding quiz-style questions. The package consists...
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Daniel TernoAIP | General Relativity and Gravitation (ASGRG)Contributed Oral
A physical black hole is a light-trapping region whose apparent horizon forms in finite time for a distant observer, irrespective of whether an event horizon exists. Recent work shows that, if such objects form, their near-horizon geometry is not merely a dynamical version of the Schwarzschild or Kerr picture: it has unusual structural properties and features that differ substantially from...
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AIP | Quantum Science and Technology (QST)Poster
Coherent control of nuclear spins is traditionally achieved through nuclear magnetic resonance (NMR). In semiconductor quantum devices, where nuclear spins are used for quantum information processing, NMR pulses are delivered via microwave antennas [1].
In our group, high nuclear-spin qudits have demonstrated an additional control mechanism: nuclear electric resonance (NER), whereby...
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AIP | Astronomy (ASTRO)Contributed Oral
Carbon and nitrogen are two of the most important elements for biological molecules. On the early Earth (approx. 4 billion years ago), however, they were primarily found as very simple and stable compounds, such as nitrogen and carbon dioxide. How did essential organic molecules form from these relatively inert starting materials? High-energy natural phenomena, such as lightning strikes and...
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AIP | Condensed Matter & Materials (CMM)Poster
Neutron scattering is a versatile probe for a variety of condensed matter systems, and the ability to control and distinguish the spin of neutrons during the measurement process allows more detailed information to be obtained for both magnetic and non-magnetic samples. At the Australian Centre for Neutron Scattering (ACNS), we are able to offer neutron spin filters on six different neutron...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Probabilistic computing aims to leverage randomness to solve difficult computational problems more efficiently than conventional methods. Photonic systems are particularly attractive owing to their ultrafast speeds, inherent parallelism, and access to quantum-limited noise sources. Existing photonic approaches have demonstrated applications ranging from random-number generation to Ising...
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AIP | Quantum Science and Technology (QST)Poster
Recent fundamental spectroscopic measurements of strongly interacting impurities immersed in a thermal Bose gas (Etrych et al., 2025) have raised an intriguing, yet foundational question: what constitutes a polaron? To answer this, we theoretically investigate the impurity spectral response in a two-component thermal Bose gas across the entire phase diagram, from a Bose-Einstein condensate to...
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Victoria Bashu (The Australian National University)AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
Micropatterned gas Time Projection Chambers (TPCs) are of interest for rare event physics where 3D reconstruction of low-energy recoil tracks has the potential to provide unique sensitivity to various searches, such as Dark Matter [1]. Camera based readouts for gas TPCs are gaining popularity to measure low-energy tracks for low cost per channel, high resolution and isolation of the readout...
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AIP | Atomic and Molecular Physics (ATMOP)Poster
Traditional positron scattering experiments are limited by their reliance on unpolarized, thermal atomic targets, which yield spin averaged cross-sections and obscure the underlying quantum exchange dynamics [1].This work addresses these limitations by employing a $^{87}$Rb Magneto-Optical Trap (MOT) to perform state-selective measurements of positron–atom interactions.
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The selection of... -
ANZOS | Quantum Computing and Quantum Information (ANZCOP QCQI)Poster
The "harvest-now, decrypt-later" threat has spurred the search for post-quantum cryptographic schemes whose security should hold up against quantum attack. Of the candidates, lattice-based constructions have emerged as the leading family, built on problems such as the Shortest Vector Problem and Learning With Errors (LWE). These constructions provide a foundation for post-quantum security,...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Single-frequency, thulium fiber master-oscillator power amplifiers (MOPAs) operating in the 2 μm spectral region are promising high-power, low-noise sources for future-generation gravitational-wave detectors. Understanding how pump and seed power fluctuations couple to amplifier output power and frequency is essential in designing active stabilisation schemes. This has been investigated for...
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Nicholas Gillespie (RMIT University)AIP | Condensed Matter & Materials (CMM)Contributed Oral
Nitrogen-vacancy (NV) centres in diamond can be used to detect radiofrequency (RF) signals through coupling of the RF magnetic field with the NV spins, combined with optical readout of the spin state. The sensitivity of such RF detectors has so far been mainly studied in terms of magnetic field sensitivity, which is relevant when the RF signal is generated by a near-field source. However, for...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Optical parametric amplifiers/oscillators can produce squeezed light, which has reduced noise in one quadrature at the expense of increased noise in the other and shows promise in optical sensors and many quantum applications. However, highly squeezed light is difficult to measure due to contributions from a plethora of noise sources. In this talk, we quantify fundamental noise limits on...
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Teodor Malendevych (University of Sydney)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Ground-to-space optical communication can be advantageous to radio due to higher data rates and better security. It is, however, much more susceptible to atmospheric turbulence resulting in signal loss. Downlinks can be corrected with existing adaptive optics (AO) technology while on the uplink weight and power concerns make AO unappealing for satellite terminals. Atmospheric pre-compensation...
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124. Precise, self-consistent predictions of gravitational waves from cosmological phase transitionsCsaba Balazs (Monash University)
The detection of a stochastic gravitational wave background from the early Universe offers a unique window into beyond-the-Standard-Model physics. As we prepare for future space-based observatories such as LISA, TianQin, and others, precise theoretical predictions of the gravitational wave (GW) spectra generated by cosmological first-order phase transitions (FOPTs) are paramount. Conventional...
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AIP | Quantum Science and Technology (QST)Poster
In many quantum information settings, quantum systems consist of three key components—states, process, and detectors—the precise estimation of which is essential for benchmarking device performance, mitigating errors, and enabling improvements toward utility-scale quantum technologies. The precise estimation of quantum states has been addressed by the state quantum Fisher Information (sQFI)...
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Sanjay Sharma Poudel (University of Houston)
DarkSide-20k is a dark matter direct detection experiment operating a dual-phase liquid argon time projection chamber (TPC) at the Laboratori Nazionali del Gran Sasso (LNGS). To reach its design sensitivity, the experiment requires a cosmogenic background contribution of less than 0.01 events over a 200 ton-year exposure. This strict requirement needs precise characterization of prompt fast...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
The next generation of neutrino oscillation experiments is expected to measure leptonic mixing parameters at the sub-percent level. This experimental sensitivity has to be matched by precise theoretical predictions. I will discuss the impact of quantum corrections on leptonic mixing parameters and discuss their implications for models of lepton flavour.
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260. Probabilistic Prediction of Solar Eruptions via Ensemble Modelling of Deterministic SimulationsAIP | Solar Terrestrial and Space Physics (STSP)Contributed Oral
Predicting solar eruptions from physics-based simulations is a challenging uncertainty-quantification problem: the governing magnetohydrodynamic (MHD) evolution is nonlinear, the coronal magnetic field is poorly constrained by observations, and the various simulation codes available use distinct numerical, physical, and boundary-condition assumptions. In this talk I will present statistical...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesPoster
Silicon metal-oxide semiconductor (MOS) device structures are vital for realizing quantum computing devices based on single atoms acting as qubits in silicon. The atoms forming the qubits must be located within about 20 nm of the Si/SiO2 interface in these devices to allow control electrodes and read-out structures to work. [1] These qubits typically are based on storing quantum information in...
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AIP | Astronomy (ASTRO)Invited talk
Asteroseismology uses the natural oscillation modes of stars to study their interiors. The wonderfully precise measurements by NASA's Kepler and TESS missions are ideal data sources for the technique. These space telescopes have been monitoring the brightness of hundreds of thousands of stars, with the main goal of discovering extra-solar planets as they transit their parent stars. At the...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Understanding protein structure is essential for elucidating disease mechanisms such as cancer, Alzheimer's disease, and type II diabetes. Among these proteins, the tumor suppressor p53 is particularly critical: its inactivation or mutation occurs in approximately 50% of human cancers. Functioning as a tetramer, p53 regulates DNA repair, cell-cycle arrest, and apoptosis—processes that maintain...
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Ian Van SchalkwykAIP | Nuclear and Particle Physics (NUPP)Contributed Oral
The pion is the lightest hadron in nature, and yet constraining key aspects of its internal structure has been the subject of much theoretical and experimental attention, and remains a challenge. Of specific phenomenological interest is the electromagnetic form factor of the pion whose behavior across a range of momentum transfers, $Q^2$, will help probe the transition between the perturbative...
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One of the greatest mysteries in modern physics is the nature of dark matter, which makes up most of the matter in the universe but has never been directly observed. Among the most intriguing candidates are ultralight bosons, hypothetical particles predicted in many extensions of the Standard Model of particle physics. These particles would interact extremely weakly with ordinary matter,...
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Abhishek Rawat (Macquarie University)AIP | Quantum Science and Technology (QST)Contributed Oral
Simulating how quantum systems evolve in time is one of the most promising applications of quantum computers, spanning chemistry, materials science, and fundamental physics. The original and still one of the most efficient tools for this is the product formula. It approximates the time-evolution operator as a sequence of simpler exponentials that map directly to quantum gates. For structured...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Hybrid continuous-variable–discrete-variable (CV-DV) quantum computers are promising platforms for quantum simulation, particularly when the continuous-variable degrees of freedom are harmonic. Extending hybrid CV-DV quantum simulation beyond harmonic dynamics requires efficient methods for implementing non-Gaussian operations. However, existing schemes are primarily restricted to a single...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Coherently manipulated large ion crystals in a Penning trap are a promising candidate for near-term quantum simulation of complex many-body phenomena, and for quantum sensing to search for beyond-standard-model physics. However, their continuous rigid-body rotation has so far limited flexible local qubit control. Here, we demonstrate programmable site-selective spin control in large rotating...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Phase-sensitive optical time-domain reflectometry (ϕ-OTDR) enables distributed acoustic sensing (DAS) by tracking the phase of Rayleigh backscattered light from an optical fibre [1]. DAS systems resolve both vibration over time, and signal location along the sensing fibre by tracking pulse return times, and phase respectively [1].
One challenge for DAS systems is the pulse return time,...
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Rory Robertson (University of Auckland)ANZOS | Quantum and Atom Optics (ANZCOP QAO)Contributed Oral
The generation of specific quantum states of light is incredibly important for the emergence of many quantum technologies, but remains a challenging task. For example, Gottesman-Kitaev-Preskill (GKP) states are current frontrunners for use in quantum error correction within photonic quantum computing models. Most proposed methods for generating particular quantum states of light are...
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Bipin Kumar (Macquarie University)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Single-longitudinal-mode (SLM) Raman lasers are emerging as powerful light sources for quantum technologies and optical clock applications due to their linewidth-narrowing and wavelength-shifting capability. Recent work has shown significant narrowing of the pump intrinsic linewidth in Raman lasers through a phonon damping mechanism analogous to linewidth narrowing in Brillouin lasers....
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Erbium ions in silicon offer a promising route to telecom-compatible quantum photonic interfaces, combining optical transitions in the telecommunications band with access to electron and nuclear spin degrees of freedom. Because the relevant Er transitions arise from intra-4f orbitals that are shielded from the host environment, Er in silicon is expected to retain much of the optical coherence...
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AIP | Quantum Science and Technology (QST)Contributed Oral
We propose a scheme to compute Pauli error rates in photonics-based quantum error correction
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using experimental observables of single photons produced from quantum emitters. We show that
first-order coherence measurements and first-order cross correlations—which can be implemented
using photon counting—can extract single-photon and entangled single-photon wavefunctions in the
presence of... -
COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Trapped and mobile interfacial charge is a primary driver of device instability in microelectronics, shifting threshold voltages in MOSFETs, limiting long-term reliability in high-k gate stacks, and degrading surface passivation in photovoltaics [1,2]. Characterizing this charge is central to interface quality control, yet established techniques remain limited: capacitance-voltage (C-V)...
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AIP | Quantum Science and Technology (QST)Contributed Oral
In numerical approaches to solving differential equations on a lattice, a representation of the derivative operator that correctly matches the continuum behaviour of momentum up to the band limit must be non-local. We present the construction of efficient linear-combination-of-unitaries ($\mathrm{LCU}$)-based block-encodings for the first-order derivative and Laplacian operators in the...
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Amalina Lai (Nanyang Technological University)ANZOS | Quantum Computing and Quantum Information (ANZCOP QCQI)Contributed Oral
Many quantum-information tasks do not neatly fit the picture of a single quantum process acting on an input state to produce an output to be measured. For example, a probe of a system need not be a one-shot measurement, but a series of interventions adapted based on a previous time-step. The dynamics being probed may also be non-Markovian, where the presence of memory may imply that the...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
We study the canonical problem of a Fermi gas interacting with a weakly repulsive Bose-Einstein condensate at zero temperature. To explore the quantum phases across the full range of boson-fermion interactions, we construct a versatile variational ansatz that incorporates pair correlations and correctly captures the different polaron limits. Remarkably, we find that self-bound quantum droplets...
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Matteo Caldara (Monash University)AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Quantum droplets are self-bound low-density configurations which may appear in ultracold gases when the attractive mean-field energy is balanced by the repulsive correction stemming from quantum fluctuations. Since their first predictions and experimental observations in dilute bosonic mixtures, the study of quantum droplets in cold-atomic settings has recently become a very active research...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Recent advances in quantum computing have enabled mid-circuit measurements and feedforward, allowing real-time adjustments to quantum circuits based on earlier measurement outcomes. This capability is essential for a wide range of applications, such as measurement-based quantum computing, while loops, the ability to reset and reuse qubits during a computation, and error correction.
As...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Non-linearity gives the capability to generate new frequencies of signals. Most commonly, the non-linear voltage-current relationship of a diode is used to perform radio-frequency mixing, where the sum, difference and harmonics of the frequencies of input electronic signals are obtained. Frequency mixing is a fundamental tool used in communications and sensing technology, both for receivers...
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ANZOS | Photonics and Optics (ANZCOP)Invited talk
The Laser Interferometer Gravitational-wave Observatory (LIGO) detectors have observed hundreds of compact binary coalescences. Their exquisite sensitivity is achieved through long-baseline interferometry with suspended test masses, among a myriad of other technological aspects. Interferometry is fundamentally limited by the quantum nature of light. At LIGO, quantum noise is mitigated through...
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Mr Xiwen Qiu (Australian National University)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Quantum non-reciprocity, in which quantum-state evolution or photon transport depends on the excitation direction, provides a powerful mechanism for controlling quantum information flow, suppressing back-propagating noise, and preserving coherence in quantum technologies [1]. However, most experimentally demonstrated quantum non-reciprocal effects retain classical analogues [2]. It remained an...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
We develop a general theory of high-harmonic generation (HHG) in solid-state systems, based on a weak-correlation expansion of photonic and matter degrees of freedom. Unlike standard HHG theories, which treat light-matter dynamics through the Schr¨odinger equation, our approach employs density-matrix evolution, naturally capturing the mixed-state character of both the field and the matter - a...
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AIP | Quantum Science and Technology (QST)Poster
Privacy-preserving record linkag(PPRL) aims to identify records referring to the same real-world entity across different databases without revealing sensitive identifiers. For example, a hospital and an insurance provider may wish to determine whether “John Smith, Sydney” in one database and “Jon Smith, Sidney” in another refer to the same person, without exposing their full records. This is...
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AIP | Quantum Science and Technology (QST)Poster
We introduce Quantum Spectral Authentication (QSA), a primitive for verifying that a remote quantum endpoint still possesses a previously installed secret quantum resource such as a hidden state or state-preparation capability without revealing that secret [arXiv:2603.24868]. The core idea is to exploit spectral features of the planted
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state under fresh public unitary challenges: each... -
ANZOS | Quantum and Atom Optics (ANZCOP QAO)Contributed Oral
Self-induced transparency (SIT) is a highly nonlinear effect in which a resonant (or near resonant) pulse of light propagates losslessly in a medium via a coherent cycle of absorption and stimulated emission. Here we study the use of SIT for creating squeezed states of light through both nonlinear phase-shifts (quadrature squeezing) and nonlinear absorption (amplitude squeezing). In...
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ANZOS | Quantum and Atom Optics (ANZCOP QAO)Contributed Oral
Quantum state tomography provides a complete characterisation of quantum systems through measurements performed in multiple complementary bases [1], enabling the reconstruction of the system's density matrix and the quantification of coherence and entanglement. Here, we report the implementation of quantum state tomography for momentum-entangled atom pairs generated in a double-halo source and...
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Quantum tunnelling underpins important phenomena ranging from scanning tunnelling microscopy to the formation of heavy elements in stars. For stellar fusion to occur, nuclei must overcome the barrier formed by the competition between the nuclear and Coulomb forces. The best models of fusion underestimate the reaction rates at energies far below the barrier, predicting that reactions like...
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AIP | Quantum Science and Technology (QST)Contributed Oral
A hitherto untested prediction of quantum field theory is the possibility of photon-photon interactions in vacuum mediated by zero-point fluctuations of charged matter, which manifests in the vacuum acquiring nonlinear properties akin to a dielectric medium. We point out that signatures of vacuum nonlinearities are intrinsically present in cavity-enhanced laser interferometers where the...
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AIP | Physics Education (PEG)Contributed Oral
For 20 years New Zealand has been at the forefront of broadening concepts of science and innovation to include Māori knowledge, people and places. This has been more than rhetoric, with Te Whai Ao, Dodd Walls Centre of Research Excellence for photonic and quantum technologies contributing to this direction.
In this presentation, we report on a novel project that brings together quantum...
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ANZOS | Quantum and Atom Optics (ANZCOP QAO)Contributed Oral
Precision metrology underpins scientific and technological advancements. Quantum metrology offers a pathway to surpass classical sensing limits by leveraging both quantum states and measurement strategies. However, measuring multiple incompatible parameters suffers from a fundamental limit, exemplified by Heisenberg's uncertainty principle for two non-commuting observables, such as position...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
Quantum geometry quantifies how the single-particle Bloch wavefunction changes in phase and amplitude across the Brillouin Zone. In multi-orbital systems where bands have strongly mixed orbital composition, quantum geometry plays a vital role in determining the ground state and low-energy properties of interacting electronic systems. In this work, we show that Mott metal-insulator transitions,...
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AIP | Nuclear and Particle Physics (NUPP)Poster
Proton-boron fusion is a resonant reaction with a large positive Q-value that decays via multiple channels into three $\alpha$ particles. These properties make it a leading candidate for aneutronic fusion energy production and show significant promise for using boron as a dose enhancement agent in proton therapy in cancer treatment. Modelling these applications requires a precise reaction...
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Space radiation being a safety risk to astronauts and electronics damage poses a threat to any satellite mission and consequently associated with huge economical losses. Radiation sensors predicting damage of electronics and evaluate radiation hazard for astronauts under conditions of unpredictable space weather allow they timely mitigation.
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Talk will cover development of silicon sensors for... -
ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Qudit systems are promising for quantum information processing by harnessing a larger Hilbert space. In atomic systems, qudits can naturally be encoded in the Zeeman sublevels of hyperfine manifolds. However, universal control of such hyperfine qudits is challenging due to spectral crowding of transitions within the Zeeman manifold. A potential solution uses quantum optimal control of...
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AIP | Condensed Matter & Materials (CMM)Poster
Criticality has been proposed as a computationally advantageous operating regime in neuromorphic systems, but its practical implementation is challenged by the need to tune system parameters to a critical point precisely. In disordered systems, structural heterogeneity can generate rare-region effects that modify the nature of phase transitions. Here, we investigate the influence of a...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Searches for Beyond Standard Model physics in molecular systems have become an increasingly active area of research in recent decades. CP-violating interactions and hyperfine parameters are both sensitive to the behaviour of the electronic wavefunction in the nuclear region. Consequently, precise measurements and accurate calculations of molecular hyperfine structure provide an important...
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AIP | Astronomy (ASTRO)Contributed Oral
For decades, students have been asking, “What is the purpose of this experiment?”[1] Lab classes have traditionally been used to reinforce lecture content, but recent studies show that labs with the goal of teaching experimental practices and scientific thinking are more effective.[2]
To this end, we describe a project at The University of Melbourne to modernise astronomy and physics lab...
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Benjamin KelleyAIP | Physics Education (PEG)Contributed Oral
Australian physics education faces a pipeline crisis. Declining senior physics enrolments reduce the pool of students entering physics-intensive university courses, while shortages of physics-trained teachers weaken the conditions needed to attract, retain, and develop future physics students. In many schools, physics is sustained by small classes, isolated teachers, heavy workloads, limited...
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AIP | Nuclear and Particle Physics (NUPP)Focus session talk
Geant4 is a widely used open-source Monte Carlo toolkit for the simulation of particle interactions with matter, with extensive applications in medical physics, including radiotherapy, nuclear medicine, medical imaging and radiation protection. In this context, developments within the Geant4 Collaboration are aimed to extend functionality and improve the accuracy of physics models for medical...
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Prachi Nagpal (University of Sydney)AIP | Quantum Science and Technology (QST)Contributed Oral
Deterministic preparation and reconstruction of high-energy Fock states have potential applications in quantum metrology [1], computing [2], simulation [3], and the study of fundamental physics. In trapped ions, common methods to characterise an arbitrary Fock distribution employ first-order sideband interactions [4] of the Jaynes-Cummings type, causing them to fail at high energies due to the...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
The reconstruction of three-dimensional (3D) distributions of scattering properties in diffuse media remains a challenge in biomedical imaging. There is considerable interest in improved optical imaging methods for breast cancer detection, as conventional X-ray mammography exposes patients to ionising radiation and may cause discomfort, discouraging regular screening. However, the highly...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum Error Recovery (QER) uses knowledge of the error channel acting on a quantum system to find optimal recovery maps. The scheme restores the uncorrupted state with a fidelity exceeding that achieved by noise parameter independent quantum error correction. We use a generic coherent QER map implemented with a quantum circuit acting on the system together with ancillary qubits to recover...
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AIP | Physics Education (PEG)Invited talk
Physics problem solving is central to teaching and assessment, yet many students learn to succeed by recognising familiar question types and manipulating equations, without developing the conceptual understanding, strategic thinking and transferrable reasoning expected of expert physicists. Research in physics education highlights that expert problem-solving requires more than ‘plug-and-chug’:...
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653. Reducing the effective mass of two-dimensional holes in silicon MOSFETs via crystal orientationAIP | Condensed Matter & Materials (CMM)Poster
Holes in silicon are a promising approach to quantum devices due to their strong intrinsic spin-orbit coupling and compatibility with legacy semiconductor fabrication. However, recent work by Wendoloski et al. [1] suggests that holes in silicon have a larger transverse effective mass than naïve expectations, approximately $0.6m_0-0.7m_0$, as compared with the traditional band-edge value of...
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AIP | Quantum Science and Technology (QST)Contributed Oral
In trapped ion quantum computers, two-qubit gates are mediated by collective vibrations of ions within a single trap, featuring high connectivity between spatially separated qubits. However, conventional mechanisms rely on single-mode excitations which creates a strong trade-off between gate speed and fidelity in larger ion systems. Modern architectures circumvent this using small ion traps...
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Quantum gravity candidate theories are expected to resolve the curvature singularities of classical general relativity. In the absence of a complete theory, regular ultracompact objects provide useful effective models of nonsingular compact geometries, including both regular black holes and horizonless configurations. However, many such metrics are introduced phenomenologically, making it...
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Andoni Skoufris (The University of Queensland)AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
The high-precision study of atomic systems can be applied in many practical and theoretical settings, from the development of state-of-the-art atomic and nuclear clocks to fundamental tests of the Standard Model (SM). Tests of the SM, in particular, are typically strongest in heavy and relativistic atomic systems where very weak, parity-violating effects described by the SM or extensions...
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AIP | Astronomy (ASTRO)Poster
The Transiting Exoplanet Survey Satellite (TESS) helps identify thousands of exoplanet candidates using the transit method. This study analyzes 30 TESS light curves to characterize any potential exoplanets. After running our own BLS algorithm, we narrowed down the candidates to three. However, because many transit-like signals are false positives from nearby eclipsing binary systems (NEBs) or...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Mobile impurities interacting with a quantum medium form quasiparticles known as polarons, a central concept in many-body physics. While the quantum impurity problem has been extensively studied with ultracold atomic gases, repulsive polarons in the strongly correlated regime have remained elusive. Typically, the impurity atoms bind into molecules or rapidly decay into deeper-lying states...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Spectral reconstruction is a computational technique used to recover spectral information from a limited number of spectrally selective optical measurements. It is particularly useful for compact spectroscopic systems, where the measured response may be limited by filter bandwidth, tuning step size, signal-to-noise ratio, or available instrumentation. By combining calibrated filter responses...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
For twenty years, a persistent discrepancy between experimental measurements and theoretical calculations of the muon anomalous magnetic moment has provided tantalising hints of new physics. In recent years, improvements to the experimental precision have appeared to make the tension stronger and stronger. However, at the same time, our new theoretical computation using lattice QCD overturned...
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N. Stavrias (Swinburne University of Technology)AIP | Condensed Matter & Materials (CMM)Contributed Oral
The macroscopic presentation of ordered phases in strongly correlated materials such as superconductivity and charge density waves (CDW) are intricately linked to the interactions within and between the various elementary excitations. Ultrafast spectroscopy with temperature and fluence control is a powerful technique for disentangling these interactions.
1T-TiSe$_2$ is a CDW system which...
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Dr Liam Scarlett (Curtin University)AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
The vibrational excitation of molecular hydrogen (H$_2$) by low-energy electrons is one of the most fundamental reactions in atomic and molecular physics, playing a key role in the chemistry of the interstellar medium and studies of fusion plasmas. Crossed-beam experiments and electron swarm measurements have long been used to determine scattering cross sections for vibrational excitation, but...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
We consider the behavior of a small density of mobile impurities (polarons) immersed in a quantum gas, a generic scenario that can be realized in cold atomic gases, liquid helium mixtures, and doped semiconductors. We present a unified theoretical framework for understanding polaron quasiparticles beyond the single-impurity limit, and we identify two key factors that control the...
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AIP | Condensed Matter & Materials (CMM)Invited talk
Realising the potential of quantum technologies in the solid state at room temperature demands compatibility with existing electronics and semiconductor fabrication infrastructure. Silicon carbide (SiC) is a compelling candidate: it underpins a mature global power-electronics industry and hosts native quantum defects that, while long considered a nuisance for device performance, may prove to...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Pulsed gallium nitride (GaN) semiconductor lasers offer a compact, robust, and cost-effective source for underwater LiDAR (Light detection and ranging), with applications in object detection, property measurement, optical sensing, environmental monitoring, and defence [1,2]. Practical deployment, however, requires sufficient pulse energies to overcome absorption and scattering, especially when...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
When a mobile exciton is immersed in a Fermi sea of charge carriers, it is dressed, forming attractive and repulsive polaron branches, whose low-energy physics is captured by the crossover between the trion and polaron pictures [1]. While this ground-state polaron physics is now well established, the fate of Rydberg-exciton states under doping — and their relationship to the excited trion...
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Antoine Cools (University of Melbourne)AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
The SABRE South experiment at the Stawell Underground Physics Laboratory (SUPL) is preparing to become Australia's first deep-underground dark matter direct-detection experiment, using an array of ultra-pure NaI(Tl) crystals to test the annual modulation signal reported by DAMA/LIBRA. We present the status of detector assembly and commissioning, from the integration of the liquid scintillator...
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Kieran Rule (University of Melbourne)AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
The SABRE South experiment at the Stawell Underground Physics Laboratory (SUPL) is preparing to deploy an array of ultra-pure NaI(Tl) crystals to test the annual modulation signal reported by DAMA/LIBRA. We present first results from bare crystal measurements underground, a critical milestone as production of the final SABRE South crystals is now underway. A >6.5 kg prototype crystal grown...
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Subrahmanya Saicharan PemmarajuAIP | Nuclear and Particle Physics (NUPP)Contributed Oral
The SABRE South experiment at the Stawell Underground Physics Laboratory (SUPL) will soon become Australia’s first deep-underground direct-detection dark matter experiment. In preparation for commissioning and data taking, a suite of software tools has been developed to support detector simulation and data analysis.
This work presents the software frameworks underpinning SABRE South’s...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesPoster
The Thermoradiative Diode (TRD) is a novel application of mid infrared semiconductors to generate power via radiative emission. Existing TRD research has established potential theoretical energy limits [MN1.1]for ideal TRD operation. Researchers have speculated on potential TRD applications covering the limitations of terrestrially mounted TRDs and their interaction with Earth’s atmosphere....
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AIP | Quantum Science and Technology (QST)Contributed Oral
To produce an operable quantum computer that is made with imperfect hardware, we must design and test scalable quantum error correcting codes that are suited for the devices we can build and, in unison, develop decoding strategies that accommodate device-specific noise characteristics. Here, we introduce the dynamic compass code, a subsystem code with a novel syndrome extraction cycle, that...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Superconducting quantum technologies have emerged as a leading platform for quantum computing and quantum sensing over the past three decades. A key enabling component in these systems is the quantum-limited amplifier (QLA), which is essential for high-fidelity qubit readout and has also found important applications in areas such as dark matter detection [1]. State-of-the-art QLAs are...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
High-quality factor (high-Q) resonant metasurfaces provide a powerful means of light-matter interaction [1], yet translating these individual resonances into scalable, multifunctional systems remains a significant challenge. Specifically, the characteristic spectral selectivity of high-Q modes, combined with the spatial extent typically required to support nonlocal resonances, often limits the...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
Many new physics theories predict the existence of heavy, top-philic resonances that couple exclusively to Standard Model top quarks. These hypothetical particles can be probed only by searching for events with three or four top quarks in the final state. In this talk, we will present the latest results from the ATLAS search for these new resonances performed using the full Run 2 dataset...
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Tom Perissinotto (The Australian National University)AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
Until recently, many deformed nuclei have been considered to have excitations described by the collective model of Bohr and Mottelson. However, the interpretation that some states have a collective vibrational character has been challenged to the point that it is necessary to ask whether or not two-phonon excitations exist among the low-energy states of atomic nuclei. In particular,...
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Luke JohnstoneAIP | Nuclear and Particle Physics (NUPP)Contributed Oral
A leading challenge of nuclear-structure research is to understand the properties of nuclides with extreme isospin. Experiments at radioactive-ion-beam facilities, such as the Facility for Rare Isotope Beams in the US, may answer key questions that address diverse topics including fundamental nuclear physics, stellar nucleosynthesis and nuclear applications. The study of shapes in atomic...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Nulling interferometry provides a method for detecting faint companions close to bright stars by suppressing the on-axis stellar signal while transmitting light from an off-axis source. This approach is implemented in the Guided Light Interferometric Nulling Technology (GLINT) instrument at the Subaru Telescope, where an integrated photonic beam combiner is used to perform simultaneous nulling...
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AIP | Quantum Science and Technology (QST)Poster
Fabrication of large-scale quantum computer devices comprised of donor atoms in silicon could employ some of the standard techniques of the semiconductor device industry. Exploiting the promise of long coherence times of electron and nuclear spins in enriched silicon requires ordered arrays of donor qubits [1] coupled by gates in a silicon substrate depleted in the $^{29}$Si isotope (nuclear...
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Prof. Alexandre Douplik (Toronto Metropolitan University)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
High-resolution optical imaging in biological tissues is fundamentally limited by photon scattering, which reduces interrogation depth and degrades spatial resolution and absorption-based contrast. Existing scatter-rejection techniques often require complex instrumentation or compromise imaging performance. This study investigates numerical aperture (NA) gating, based on spatial-angular...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Errors in current quantum computers significantly limit the practicality and scalability of quantum algorithms, as noise accumulates in deep circuits and degrades quantum information. Although quantum error correction (QEC) offers a path toward fault-tolerant computation, the substantial spacetime overhead of existing protocols limits their feasibility on near-term devices. Building on recent...
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AIP | Theoretical Physics (TPG)Contributed Oral
Muons are about 207 times heavier than an electron, but other than that have the same fundamental properties and, just like an electron, can orbit an atomic nucleus. Due to its mass, the orbit of the muon is much closer to the nucleus, making it very sensitive to the effects of the nuclear structure.
Conventional muonic binding energy calculations typically treat the influence of the muon...
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AIP | Condensed Matter & Materials (CMM)Poster
Historically, superconducting systems have been tackled using mean-field approximations, which presents physicists with a persistent issue: the mean-field. Often, assumptions are made about the mean-field Hamiltonian of superconducting systems; thus, for a description to be completely rigorous and physical, the mathematical consistency of the mean-field Hamiltonian must be verified. While...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Ultrasensitive photodetectors empowered by self-powered capability are pivotal aspects of modern technology that underpins numerous applications spanning across aerospace, life sciences, and environmental monitoring. Despite significant advances in photodetectors, strategies integrating the thermo-pyro-phototronic effects to modulate the generation and transport of charge carriers for...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Terahertz (THz) technologies are increasingly important for imaging, spectroscopy, sensing and future wireless communications, creating demand for compact, sensitive and scalable detector platforms [1]. Group III–V semiconductor nanostructures offer unique opportunities for THz photonics through their high charge-carrier mobility, controllable charge dynamics, strong electromagnetic anisotropy...
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Toby Severs Millard (Imperial College London / The University of Melbourne)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Nonlinear interferometry allows amplitude and phase information to be transferred between light that senses an object and light that is only detected. The technique exploits correlated photon beams generated via difference frequency generation or parametric fluorescence. When implemented non-degenerately, information can be passed between wavelengths to circumvent the technical and fundamental...
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Dr Timothy Newman (The Little Magnet Company)AIP | Condensed Matter & Materials (CMM)Poster
Superconducting magnets are essential for many solid-state quantum research efforts, but conventional systems impose significant constraints on experiments. They occupy the majority of the available experimental volume of a dilution refrigerator, increase the time taken to cool and warm a cryostat, and limit a fridge to a single magnet — and therefore a single experiment — at a time....
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ANZOS | Photonics and Optics (ANZCOP)Poster
Long-wavelength optical measurement has attracted significant attention in non-destructive inspection as a non-contact, non-invasive method. Research utilizing carbon nanotube (CNT) film sensors combines their ultra-wide bandwidth with high optical absorbance. This unique combination enables observers to evaluate optical properties across a range of wavelengths. Consequently, the evaluation...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Flexible crystalline silicon (c-Si) solar cells offer a promising route toward lightweight, wearable, and portable photovoltaic (PV) technologies. However, achieving high performance through low-temperature, cost-effective fabrication remains a significant challenge. This work demonstrates a novel hybrid solar cell (HSC) architecture by integrating light-trapping silicon nanowires (SiNWs) with...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Nonlinear mappings lie at the core of modern machine learning models, underpinning their success in highly complex tasks. In optical neural networks (ONNs), nonlinearities are traditionally generated through higher-order light–matter interactions, commonly by encoding information in the electric field and measuring the response of specific optical materials. However, nonlinear encoding can...
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Liam Flew (University of Sydney)AIP | Quantum Science and Technology (QST)Contributed Oral
Simulating open quantum systems is computationally challenging, particularly in the non-Markovian regime, where the system’s evolution depends on its history. Due to this computational cost, classical approaches for modelling such dynamics are limited to small systems or simple models. Quantum computing offers a promising route for overcoming these limitations; however, existing methods for...
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Lucija Grba (The University of New South Wales)AIP | Quantum Science and Technology (QST)Poster
Quantum devices are subject to noise detrimental to their qubits' fidelity and coherence times. In spin qubits, one of the dominant noise sources is charge noise arising from device defects that form charge traps. Dynamical decoupling (DD) can refocus qubits, cancelling noise fluctuations well below or well above the DD pulse repetition rate. However, it acts as a narrow filter, leaving noise...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
The coherent muon to electron transition (COMET) experiment is searching for evidence of new physics via direct muon to electron decays in muonic aluminium, aiming to reach a sensitivity of $3\times10^{-15}$ in Phase-I and $1\times10^{-17}$ in Phase-II, a factor 10000 improvement. The detector system for Phase-I, currently under construction at the J-PARC facility in Japan, is comprised of a...
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AIP | Condensed Matter & Materials (CMM)Poster
The Wombat instrument is one of a few neutron diffraction instruments in the world to have a large position sensitive (effective area) detector, which has greatly supported the wide range of science applications and outcomes the instrument is able to undertake [1]. To date there have been limited single crystal studies undertaken on the Wombat instrument due to peak integration software being...
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AIP | Quantum Science and Technology (QST)Poster
Electrons floating in vacuum provide a clean platform for quantum information processing due to their isolation from material defects. Electrons on solid neon have emerged as a promising qubit platform, with previous studies reporting long coherent time and high single-qubit gate fidelity [1]. Here, as a step toward the realization of a charge qubit, we couple electrons trapped on solid neon...
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Rene KallaANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Both short- and long-haul communication networks rely on optical fibres to satisfy the continually increasing demand for data capacity and transmission speed. In short-reach links, such as those within and between data-centre racks, vertical-cavity surface-emitting lasers (VCSELs) are commonly paired with multimode fibres (MMFs) to transmit binary data as rapidly modulated optical...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Optical microscopy is a powerful tool for observing fine structural details and dynamics in biological samples. However, absorption and scattering limit its reach to shallow regions, motivating the use of endoscopic approaches for minimally invasive access to deeper environments. Among these, multimode fibres (MMFs) offer a high information capacity imaging platform within a hair-thin...
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Ritik Sareen (RMIT University)AIP | Quantum Science and Technology (QST)Contributed Oral
State preparation is a cornerstone of quantum technologies, underpinning applications in computation, communication, and sensing. Its importance becomes even more pronounced in non-Markovian open quantum systems, where environmental memory and model uncertainties pose significant challenges to achieving high-fidelity control. Invariant-based inverse engineering provides a principled framework...
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AIP | Nuclear and Particle Physics (NUPP)Invited talk
Energy density functional (EDF) methods provide one of the most powerful approaches for describing nuclei across the nuclear chart, but conventional functionals typically require many phenomenological parameters fitted to finite-nucleus data. We present a systematic investigation of a Skyrme quark–meson coupling (SQMC) energy density functional derived from the quark–meson coupling (QMC)...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Polarimetric thermal imaging provides information beyond conventional infrared intensity imaging, including surface orientation, material properties and polarisation signatures. Existing mid-wave infrared (MWIR) polarimetric imaging systems typically rely on rotating polarisers, beam splitters or detector-integrated micropolariser arrays, increasing system complexity and limiting compact...
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Prof. Michael Wheatland (University of Sydney)AIP | Solar Terrestrial and Space Physics (STSP)Contributed Oral
We develop a Convolutional Neural Network (CNN)-based framework to improve solar flare identification from soft X-ray (SXR) observations and investigate flare size-waiting-time correlations, where by size we mean SXR peak flux. We study the statistical properties of solar flares both globally (i.e., across the solar disk) and locally (i.e., within individual active regions, ARs) and compare...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Optical frequency combs generated in driven passive microresonators are central to applications in spectroscopy, metrology, and communications, and are promising for on-chip integration [1]. These microcombs often take the form of soliton crystals (SCs), ordered ensembles of ultrashort pulses known as cavity solitons [1,2]. In microresonators, SC formation is usually enabled by avoided mode...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Optical frequency combs generated in driven passive cavities are generally associated with cavity solitons, arising from the balance of gain and loss and of Kerr nonlinearity and anomalous quadratic dispersion [1]. Their formation is successfully described by the Lugiato–Lefever equation (LLE) [2]. Cavity solitons often organize into soliton crystals (SCs), ordered arrays of closely spaced...
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AIP | Condensed Matter & Materials (CMM)Poster
The Australian and New Zealand Institutes of Physics (A&NZIP) Condensed Matter and Materials Conference (colloquially known as "Wagga"), began in 1977 as the "AIP Solid Sate Physics Meeting", following an idea from two CSIRO Scientists to create an opportunity in Australia for young researchers to present their research to fellow solid state physicists in a "friendly" environment. While many...
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ANZOS | Photonics and Optics (ANZCOP)Poster
Metasurfaces provide a versatile and lightweight alternative to conventional optical components, making them attractive for future space-based imaging, sensing, and communications systems. However, their use in space requires confidence that the nanostructured optical surface can withstand the mechanical and thermal environments experienced during launch and operation of a space-based payload....
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John Wallis (The University of Western Australia)AIP | Astronomy (ASTRO)Contributed Oral
Super resolution techniques have achieved impressive results in fields such as microscopy and lithography where engineered sources of light can be used to beat the diffraction limit [1]. However, for astronomy the light source is set by the target object and as such to achieve super resolution a measurement must passively extract more information from each photon. One such measurement scheme...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Correlated noise is a central challenge for scalable quantum error correction: temporal memory and spatial structure can concentrate otherwise rare faults into bursts that evade the assumptions behind standard threshold estimates. However, there remains a gap between microscopic non-Markovian open system dynamics and the stochastic Pauli error models used in stabilizer code simulation and...
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AIP | Astronomy (ASTRO)Contributed Oral
Galaxy spectra encode detailed information including redshift, ionisation conditions, metallicity and stellar content, but the features needed to recover these quantities are often faint, blended or unmeasurable in faint and distant sources, and labelled training data remain limited. We present SpecML, a self supervised foundation model that learns general representations of galaxy spectra...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Simulating the quantum properties of molecules and materials is a leading application for quantum computing, with the primary task being the estimation of ground-state energies. Recent advances leverage spectral amplification, a technique that encodes an operator with amplified eigenvalues relative to the system Hamiltonian. By expressing the Hamiltonian as a sum of squares and block-encoding...
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Quantum information theoretic objects like the two point function or mutual information can be used to probe the geometry of spacetime, recovering the metric from measurements of a quantum field theory. Here, we give an overview of how this is done and extend it to quantum fields with a Lorentz covariant ultraviolet cut-off in flat and curved spacetimes, as well as fields under a wavelet...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Solar cells deployed for space, terrestrial, and commercial applications must achieve long-term stability and efficient harvesting of the solar spectrum. Ultraviolet (UV) light is a major stressor of solar cell stability and power conversion efficiencies (PCEs) during extended operation, particularly in the case of perovskite solar cells. UV irradiation of solar cells breaks organic bonds,...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum entanglement can enable revolutionary technologies for faster computing and precise sensing. However, it is fragile and easily lost if the quantum system interacts with a thermal environment.
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This talk will discuss how thermalization with hot degrees of freedom can drive a quantum system from an unentangled state into a long lived entangled one. In particular we study the spin... -
AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum phase transitions (QPTs) are interesting physical phenomena that often emerge in systems which are difficult to simulate classically, such as many-body systems in the thermodynamic limit. Recent research has shown that the Quantum Rabi Model (QRM) can exhibit signatures of a superradiant QPT [1], despite comprising only one qubit and one bosonic mode, and can be studied using...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
Social media platforms provide large-scale examples of interacting many-body systems, in which collective behaviour emerges from local interactions between heterogeneous agents. In this work, we study ideological asymmetry on Twitter/X using tools motivated by statistical physics and condensed matter theory. Users are assigned positions on a left-right ideological axis from their retweet...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
The Future Circular Collider (FCC) programme, proposed at CERN, consists of a luminosity-frontier electron-positron collider (FCC-ee) as a first stage, followed by an energy-frontier hadron collider (FCC-hh) as a second stage, and promises the most far-reaching physics programme for the post-LHC era. FCC-ee is a precision instrument to study the Z, W, Higgs and top particles, and offers...
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Peter Marinos (Stanford University)
High-precision measurements of cosmic-ray (CR) electrons are confined to the heliospheric environment, leaving the distribution in the nearby interstellar medium poorly constrained. We propose to probe the CR-electron spectrum outside the heliosphere by searching for extended Compton emissions from the stellar radiation fields surrounding individual stars in Fermi--LAT data. We have identified...
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ANZOS | Photonics and Optics (ANZCOP)Poster
Optical atomic clocks represent the state-of-the-art in high-precision timekeeping. However, their large footprint and high-power consumption limit their integration into portable systems. This work presents a strategy to transition Rubidium (Rb) atomic optical clocks toward a 1-litre, low-SWaP (Size, Weight, and Power) package by replacing bulky photonic components with photonic integrated...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
We present the simulation, fabrication, and experimental demonstration of on-chip stimulated Brillouin scattering (SBS) in InGaP-on-SiO₂ waveguides operang near 1550 nm. Brillouin scattering is a third-order nonlinear interaction between optical and acoustic waves that produces narrow linewidth microwave signals through the Brillouin gain process, desired for applications such as...
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AIP | Quantum Science and Technology (QST)Contributed Oral
The rapidly growing energy demands of AI have driven renewed interest in alternative approaches to computation. One alternative is physical neural networks (PNNs) in which inference and potentially training is performed directly by physical processes. Stochastic PNNs use stochasticity for computation, which is either classical (thermal) or quantum in nature. This stochasticity can dominate in...
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Wave Ngampruetikorn (University of Sydney)AIP | Theoretical Physics (TPG)Poster
Stochastic resetting—intermittently returning a process to a fixed reference state—has emerged as an effective mechanism for optimizing first-passage properties. Existing theory largely treats processes that search but do not learn: the searcher follows fixed dynamics, accumulating no knowledge between resets. Here we ask how stochastic resetting interacts with reinforcement learning, where...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesPoster
Perovskite solar cells (PSCs) have become increasingly prominent as a promising route within the photovoltaics field owing to their attractive combination of cost-effective, high-power conversion efficiencies and tuneable bandgaps. Among them, carbon-based perovskite solar cells (C-PSCs) are rapidly gaining recognition as a highly exciting architecture for realizing low-cost, stable, scalable...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum error correction—procedures that detect and correct errors in quantum states without disturbing encoded logical information—is essential for building scalable quantum computers. Traditional error-correcting methods are static: logical information is encoded into spatial correlations of physical qubits that remain fixed throughout computation. Recent developments in dynamical, Floquet,...
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AIP | General Relativity and Gravitation (ASGRG)Poster
A class of naked strong curvature singularities is ruled out in Bakry-Emery spacetimes by using techniques of differential topology in Lorentzian manifolds. These spacetimes admit a Bakry-Emery-Ricci tensor which is a generalization of the Ricci tensor. This result supports to validity of Penrose's strong cosmic censorship conjecture in scalar-tensor gravitational theories, which include...
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ANZOS | Photonics and Optics (ANZCOP)Poster
The ResTA module (STM14_5441 – STM14_5442) is a type II toxin–antitoxin system composed of the RNase toxin ResT and the antitoxin ResA, implicated in bacterial persistence under antibiotic stress. Here, we report crystal structures of the Salmonella Typhimurium ResTA complex and characterize the molecular function of ResT as a ribosome-dependent RNase. Structural analysis and mutational...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
We discuss novel types of subwavelength passive and active metadevices driven by resonances that allow generation of structured light and structural thermal radiation.
First, we demonstrate a new strategy for generation of optical vortices at the nanoscale that surpasses single-pixel phase control [1]. We reveal that interaction between neighbouring nanopillars of a meta-quadrumer can...
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AIP | Nuclear and Particle Physics (NUPP)Poster
The Higgs boson plays a unique role in the Standard Model of Particle Physics (SM), which describes the fundamental building blocks of the Universe. Postulated in 1964, the Higgs defied discovery for around 50 years, until it was observed at CERN’s Large Hadron Collider (LHC) in 2012. Much has been learned about the Higgs in the years since its discovery, but much remains to be learned. A next...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Power scaling of fibre lasers and amplifiers whilst maintaining excellent beam quality is important for defence, micro-machining, wind lidar, and scientific discoveries. Single spatial fibre mode systems are reaching limits of power-scaling due to limitations imposed by thermal and non-linear effects; the dominant effect for narrow linewidth light being stimulated Brillouin scattering....
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AIP | Quantum Science and Technology (QST)Contributed Oral
Fast simulation algorithms for large systems of correlated electrons will revolutionise our predictive capabilities for chemical phenomena and is perhaps the most compelling promise of fault-tolerant quantum computers. Moreover, a suite of common electronic behaviour, including superconductivity and magnetism, is captured by the Hubbard model, which describes electron interactions on a...
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AIP | Quantum Science and Technology (QST)Poster
Photon based quantum technologies, such as quantum key distribution (QKD) or quantum computing, require single photon sources and single photon detectors. In terms of detectors, Superconducting Nanowire Single Photon Detectors (SNSPDs) have demonstrated their superiority towards for example single-photon avalanche photodiodes (SPADs). These detectors exhibit near unity quantum efficiency,...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Vanadium silicide, V$_3$Si, is a superconducting, SC, silicide with a comparatively high superconducting transition temperature, T$_c$ ~ 17 K, and upper critical field, B$_{c2}$ ~ 20 T. [1, 2] It has the A15 structure and can be formed into thin superconducting films on substrates including silicon dioxide, SiO$_2$, and silicon-on-insulator, SOI, by V deposition and thin film reaction making...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Practical implementation of Fault-Tolerant Quantum Computation (FTQC) relies on a means to efficiently mediate logical qubit interactions. Transversal Controlled-NOT (CNOT) gates solve this task by using a set of corresponding operations between associated data qubits across two code blocks. Device properties such as the number of available qubits and connectivity limitations have, until...
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Alex Ryan (University of Sydney)ANZOS | Quantum Computing and Quantum Information (ANZCOP QCQI)Contributed Oral
Superconducting circuits are a leading platform for quantum computing due to their strong coupling to microwave photons, highly customizable design, and long coherence times. The fluxonium qubit in particular has recently shown promise, demonstrating millisecond coherence and high anharmonicity, leading to impressive single and two-qubit control fidelity. However, further improvement in qubit...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Hydrogen is a common impurity within semiconductors and devices. It is often introduced into devices intentionally to passivate bulk and surface defects, due to its high diffusivity and presence in many treatments it is also often introduced unintentionally. This is particularly problematic for boron-doped silicon as hydrogen will almost always electrically deactivate boron when introduced....
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Prof. Feng Wang (Swinburne University of Technology)AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Organic heterocyclic inhibitors reduce iron corrosion primarily through adsorption at the metal interface; however, the influence of molecular isomerism on adsorption selectivity across different Fe surfaces remains insufficiently understood. In this work,
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density functional theory (DFT) calculations are employed to investigate the adsorption behaviour of two... -
Sheon Chua (Australian National University)AIP | General Relativity and Gravitation (ASGRG)Contributed Oral
In large optical systems, such as the Laser Interferometric Gravitational-wave Observatory (LIGO) [1], active seismic isolation is used to reduce the optical platform motion. However, inter-platform motion presents a significant noise challenge to the low frequency sensitivity of these instruments. Suspension platform interferometry (SPI) [2] provides a potential solution via the measurement...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Conventional imaging systems measure the intensity or amplitude of the optical field. Transparent samples, such as biological cells, are weakly absorbing and exhibit poor contrast in such systems. However, spatial changes in the refractive index and thickness within these samples lead to changes in the phase. Converting these phase variations into amplitude modulations provides a means to...
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Joshua GillAIP | Nuclear and Particle Physics (NUPP)Contributed Oral
General Relativity (GR) is the classical interpretation of gravitational interaction. Equivalently, GR can be represented as an effective field theory (EFT) of the non-trivial self-interacting theory of a massless spin-2 particle. The Planck mass sets the high-energy cutoff, which is where we expect to see the effects of quantum gravity. Various modifications to gravity significantly lower the...
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AIP | Condensed Matter & Materials (CMM)Poster
The first experimental realization of the moiré effect in bilayer graphene at the “magic” 1.1° [1] has led to the discovery of remarkable phenomena, including unconventional superconductivity and the quantum anomalous Hall effect. Twisted two-dimensional heterostructures are emerging as an active field for exploration of unexplored physical phenomena. Recently, twisted oxide heterostructures...
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Stephane Coen (Department of Physics, University of Auckland)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Conventional computing architectures rely on deterministic bits, ensuring consistent and repeatable operations. This paradigm can however be inefficient when modelling systems in which randomness plays a fundamental role. In contrast, probabilistic bits (P-bits), which fluctuate between binary states according to a controllable probability distribution, provide an attractive alternative for...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Chirality, fundamentally defined by a lack of mirror symmetry, manifests in light-matter interactions as optical chirality — a differential response to circularly polarized light. Metasurfaces offer an efficient, subwavelength platform for engineering these effects. We establish a definitive link between the structural geometry of a dielectric metasurface and its optical chirality across...
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AIP | Condensed Matter & Materials (CMM)Poster
Thin film technology plays a crucial role in modern scientific and industrial applications, such as solar cells, sensors, optoelectronic devices, and environmental remediation systems. Among the various deposition techniques, spray pyrolysis has emerged as a cost-effective, simple, and scalable method for producing high-quality thin films with controlled morphology and composition.
This...
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AIP | Physics Education (PEG)Contributed Oral
Physics education is, at its core, an education in systems. It trains students to model the world as structures governed by definite rules, and this systemic mindset is among the most powerful and transferable habits that physics instils. Artificial intelligence, by the OECD definition and in its computational foundations, is precisely such a system, built, trained, and operated through data...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Despite decades of indisputable success, the Standard Model (SM) of particle physics is known to be incomplete. Indeed, explaining the observed matter-antimatter asymmetry in the Universe, given equal generation of both during the Big Bang, remains one of the most pressing problems in theoretical physics. While the SM contains a source of charge-parity (CP) violation within the quark mixing...
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Tom Harris (RMIT)AIP | Quantum Science and Technology (QST)Contributed Oral
The Gottesman-Kitaev-Preskill (GKP) code is a bosonic encoding for fault-tolerant quantum computing that protects a qubit using the phase space of a harmonic oscillator. A key feature of the code is that small continuous displacement errors can be converted into effective qubit-level Pauli errors. In ideal GKP error correction, the measured syndrome is usually decoded by standard binning: the...
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Aislin Wells (University of Sydney)AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum error correction provides a path to fault-tolerant quantum computation, even in the presence of noisy hardware. However, it comes at the cost of a large overhead; many physical qubits are required to encode a single, error-corrected logical qubit. Fortunately, this overhead may be mitigated by using hardware with structured noise. In particular, erasure errors — that is, detected loss...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Ultraviolet metasurfaces offer powerful opportunities for compact optical systems, including holography, imaging, display, and biosensing. However, their practical implementation remains challenging because UV metasurfaces require deeply subwavelength, high-aspect-ratio nanostructures as well as materials with high refractive indices and low optical loss in the ultraviolet region. Nanoimprint...
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AIP | Solar Terrestrial and Space Physics (STSP)Poster
Increasing urban developments increases energy demands which can be partly met by innovative building integrated photovoltaic solutions such as energy efficient photovoltaic windows that are semitransparent and colour neutral for visual amenities. Tandem cells if well designed in solar windows may improve conversion of high- and low- energy photons from the solar spectrum into electrical...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Passive Kerr frequency combs generated within coherently driven cavities have been shown to have huge application potential, ranging from spectroscopy to ultra-fast imaging. While the generation of high-quality Kerr combs in the near-infrared is easily achievable, the same cannot be said for visible and near-visible Kerr comb generation. Due to the strong normal dispersion of nearly all...
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Dr Amy Geddes (University of New South Wales)AIP | Physics Education (PEG)Invited talk
Numerical methods and computational modelling underpin much of modern physics research and is integral to industry roles. Not only are strong computational skills appealing to prospective employers, but the Australian Institute of Physics (AIP) accreditation of physics degrees require that graduates demonstrate competency in mathematical problem solving and coding. However, unlike other core...
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AIP | Physics Education (PEG)Contributed Oral
AI can be a fantastic aid to learning physics, but it is alas altogether too easy for students to use it to replace their learning, rather than assisting it. We present a series of experiments in trying to train and encourage students to use AI to enhance their learning, spread across several 1st and 2nd year physics and astrophysics classes.
Students are trained in prompting techniques and...
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Mr Joshua Jordaan (Australian Research Council Centre of Excellence for Transformative Meta-Optical Systems, Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Surface-emitting semiconductor lasers provide a highly adaptable, compact and integrable light source for a range of rapidly growing applications, spanning consumer devices, data-centre interconnects, 3D sensing, and the automotive and robotics industries. Vertical-cavity surface-emitting lasers (VCSELs) are the most mature devices in this category, achieving surface emission through...
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ANZOS | Quantum Computing and Quantum Information (ANZCOP QCQI)Contributed Oral
I will discuss a protocol for implementing a concatenated code with reduced check weight, via gauging out qubits in the homological product code. Along the way I will touch upon the unproven conjecture regarding the distance of the homological product code, how this protocol can be viewed as a generalised fault complex of a product of CSS code with a non-repetition classical code, the...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Preparing complex quantum states on noisy intermediate-scale quantum (NISQ) devices remains a fundamental challenge. Variational quantum algorithms (VQAs) provide a flexible framework for this task. However, their optimization often suffers from the barren plateau phenomenon, where gradients vanish exponentially as the system size increases. This has motivated two common classes of variational...
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Hyperuniform point patterns suppress density fluctuations at long wavelengths and provide an important framework for understanding order in crystals, quasicrystals, and disordered condensed matter. However, identifying hyperuniformity from finite, thermally fluctuating simulation data remains challenging, because conventional descriptors such as the pair-correlation function and structure...
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AIP | Astronomy (ASTRO)Poster
On 22 July 2028, a total solar eclipse will cross Australia from the Kimberley of Western
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Australia, through the Northern Territory and Queensland into New South Wales, with totality passing directly over Sydney. The path of totality covers almost 25% of the Australian population and over 70% of the NSW population, presenting an exceptional opportunity for astronomy and other physics outreach... -
The Cherenkov Telescope Array Observatory (CTAO) is under construction to become the world's most powerful gamma-ray observatory. With 64 telescopes of three sizes across both Hemispheres, CTAO will have an order of magnitude better sensitivity than existing instruments. Very-high-energy gamma-ray astrophysics is crucial for understanding the most extreme phenomena in our universe. Observing...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
In charged particle therapy, high energy layer switching times prolong beam delivery time, limiting treatment efficiency and accuracy. The TURBO (Technology for Ultra-Rapid Beam Operation) project aims to build a low-energy (0.5-3 MeV) demonstrator beamline for proton therapy with a large momentum acceptance (±42%), enabling rapid delivery over the full clinical energy range, alleviating this...
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ANZOS | Photonics and Optics (ANZCOP)Poster
Confocal laser scanning microscopy (CLSM) is a three-dimensional see-through optical imaging system that employs a laser as a light source to enable noninvasive observation of a sample’s internal structures. Among the various optical components constituting CLSM, a pinhole, which is a micron-scale circular spatial filter, is essential. A pinhole is an optical element that enables optical...
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AIP | Physics Education (PEG)Contributed Oral
What happens when the curriculum is quietly written by the examiner? This presentation was born from a pilot study involving high school physics teachers in New Zealand, and found a disquieting pattern: that national assessment structures can shape —and constrain— what teachers choose to teach, sometimes at the direct expense of foundational understanding.
In interviews conducted as part of...
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AIP | Astronomy (ASTRO)Invited talk
Time domain radio astronomy will be revolutionised by the Square Kilometre Array. The capability to image the sky repeatedly, over many frequencies and timescales, will allow us to explore and understand dynamic phenomena in a way that has not been previously possible. These phenomena range from events at cosmological distances, such as gamma-ray bursts and fast radio bursts, to much more...
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Evert Stolte (UNSW)AIP | Quantum Science and Technology (QST)Contributed Oral
The I=7/2 nuclear spin of a 123Sb donor in silicon forms an eight-level qudit which has demonstrated logical encoding of non-classical states [1]. In our nanoscale electronic devices, the nuclear quadrupole tensor provides the anharmonicity required for individual transition addressability. Further, voltage pulses on gates can modulate the quadrupole tensor, which can manifest as in-situ...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Articular cartilage is a fibrillar load-bearing tissue whose exceptional mechanical properties arise from coupled biomechanical and biochemical processes. In osteoarthritis (OA), this coupling progressively deteriorates, leading to irreversible tissue degeneration. OA has no cure, making early diagnosis and understanding of degeneration critical. We hypothesise that mechanical loading reveals...
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AIP | Nuclear and Particle Physics (NUPP)Focus session talk
The Future Circular Collider (FCC) is CERN’s proposed next flagship particle physics facility. With a circumference of 91 km, it would first host an electron-positron collider with centre‑of‑mass energies from 90 to 365 GeV, enabling detailed studies of W, Z, Higgs, and top quark physics. The same tunnel offers an upgrade path to a future hadron collider, with energies around 100 TeV.
The...
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AIP | Astronomy (ASTRO)Invited talk
Globular clusters (GCs) provide complementary tracers of the assembly history and dynamics of spiral galaxies. While GC systems in elliptical galaxies have been studied extensively, dynamical studies of the GC systems of spirals beyond the Local Group remain limited. In this talk, I will present results from the GECKOS survey, focusing on 19 Milky Way-mass edge-on galaxies. Using deep MUSE...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
Hyper-Kamiokande is a next-generation underground water Cherenkov detector that will deliver world-leading sensitivity to leptonic CP violation and the neutrino mass ordering, alongside searches for proton decay and studies of atmospheric, solar and astrophysical neutrinos. We present an overview of the physics programme and the Australian contribution to the analysis and calibration work that...
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ANZOS | Photonics and Optics (ANZCOP)Poster
This paper employs nanosecond laser-induced breakdown spectroscopy (ns-LIBS) to investigate the emission enhancement of aluminum (Al) targets under various gases including helium (He), argon (Ar), and air. A Q-switched Nd: YAG laser emitting at 1064 nm with 5 ns of pulse duration was utilized to generate the Al plasma. The measured results reveal that the intensity enhancement factor exhibits...
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AIP | Atomic and Molecular Physics (ATMOP)Poster
The evolution and conservation of orbital symmetry is important in understanding stereochemical reactions [1]. We are therefore interested in studying how orbital structure evolves with changes to the chemical structure and the motion of the constituent atoms. Here we use experimental and theoretical techniques based on the orbital imaging capability of electron momentum spectroscopy [2,3]....
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
A combination of large collecting aperture and a highly efficient high-resolution spectrograph is essential for demanding exoplanet science cases, particularly the search for atmospheric biomarkers. We present a design study for a high-resolution spectroscopic facility for the LFAST telescope, an array that combines light from 2640 individual 0.76m telescopes, providing collecting area...
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AIP | Astronomy (ASTRO)Contributed Oral
Since the first detection of gravitational wave (GW) emission from coalescences between black holes and neutron stars, we have only observed one confirmed multi-messenger detection: GW170817. This single event showed the promise GWs and multi-messenger astrophysics have to reveal new information about the physics of matter at densities unachievable in terrestrial laboratories. GW170817 also...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Our work forms two connected parts. The part-1 studies a class of computational problems associated with stabilizer states. The part-2 focuses on developing new state-of-the-art classical simulation algorithms.
Part-1: Stabilizer states are ubiquitous in quantum computing because they exhibit many important quantum properties such as superposition, entanglement and contextuality whilst...
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AIP | Nuclear and Particle Physics (NUPP)Invited talk
We present the status and plans of The Oscillating Resonant Group AxioN (ORGAN) Collaboration, which develops microwave cavity axion haloscopes to search for dark matter. ORGAN is a nation wide collaboration, with the main experiment hosted at The University of Western Australia.
Axions are a leading dark matter candidate. Axion haloscopes are a class of experiments which search for axion...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
The thermodynamics of light set firm upper bounds on the power conversion efficiency of a solar cell, with the Landsberg limit setting the ultimate value at 93%. The consequences of this limit are surprising, requiring time-asymmetric absorption that violate Kirchhoff's law of radiation. Time-symmetric solar power conversion schemes are limited to 87% in the case of multi-junction devices and...
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AIP | Theoretical Physics (TPG)Poster
The violation of the discrete symmetries of charge conjugation, parity inversion, and time reversal (T) observed in high energy physics are fundamental aspects of nature. A new quantum theory [1,2] based on sums over paths has been introduced to explore the possibility of their large-scale physical consequences. Within the theory, time evolution and conservation laws are phenomenological...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Cathodic arcs are a powerful technique for depositing a wide range of thin films, from diamond-like carbon to refractory materials such as tantalum. The University of Sydney’s filtered cathodic arc (SPArc) thin-film deposition system is driven by a high-current pulse that ejects material from cathode spots as they move across the cathode surface. The resulting highly ionized arc plasma is...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
The LHCb (Large Hadron Collider beauty) experiment is one of the four main detectors at CERN's LHC, distinguished by its forward geometry and precision tracking, which make it especially well-suited to studying the production of heavy hadrons containing charm and beauty quarks. The large mass of these heavy (charm and beauty) quarks, means they must be created in hard interactions during the...
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Collective tunnelling involves the coherent tunnelling of several strongly interacting particles, and is central to, for example, stellar nuclear fusion. However, it remains difficult to describe theoretically, particularly using standard time-dependent mean-field approaches. Mean-field models such as time-dependent Hartree-Fock replace pair-wise particle correlations with an average one-body...
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Dr Uwe Bandelow (WIAS Berlin)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
The propagation of optical pulses approaching the single-cycle limit requires mathematical models that extend beyond the slowly varying envelope approximation. While the Short Pulse Equation (SPE) provides an integrable model for the real-valued electric field of ultra-short pulses, the Complex Short Pulse Equation (CSPE) generalizes this framework to the analytic signal associated with the...
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Dr Mohammad Z. Rafat (The University of Sydney)AIP | Physics Education (PEG)Contributed Oral
Physics laboratories should be where students learn to think like experimental physicists: ask questions, design experiments and perform reliable measurements, critically evaluate evidence, troubleshoot problems, and communicate results clearly. In practice, many labs can evolve into something closer to recipe-following. Over years of well-intentioned refinement, often to remove ambiguities,...
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AIP | Condensed Matter & Materials (CMM)Poster
The rare-earth ion garnets (ReIG) thin films have been studied recently due to potential applications in spintronics [1]. We have demonstrated previously where the polarized neutron reflectometry (PNR) was used to study the magnetic proximity behavior at interfaces of Pt/Tb3Fe5O12/Gd3Ga5O12 (111) thin films [2]. In this study, the electronic properties, microstructures, and oxidation states of...
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Jack Morrow (The University of Queensland)AIP | Theoretical Physics (TPG)Poster
The high mass of tauons means that many of the low-$n$ tauonic atom wavefunctions overlap significantly with the nucleus, making tauonic atoms ideal probes of nuclear structure. We begin with simulations of the cascade from the initial state to the ground state to show that a measurable number of tauons would reach the $1s$ orbital before decaying via the weak force. We also do sample fits to...
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AIP | Physics Education (PEG)Poster
Despite knowing the importance of surveys in improving not only their university experience and quality, many students, persistently choose to decline this offer. This is especially pronounced in the context of giving feedback on tutor experiences in their classes, likely due to nervousness and uncertainty of confidentiality of their feedback.
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Hence, as educators it has always been a... -
Dr Sarah Scholten (Institute for Photonics and Advanced Sensing, Adelaide University)AIP | Atomic and Molecular Physics (ATMOP)Invited talk
Atomic clocks provide precise timing signals critical to modern infrastructure including Communication networks, power infrastructure, and positioning, navigation and timing (PNT) services such as the Global Navigation Satellite System (GNSS). While these clocks have traditionally used microwaves to drive atomic transitions, recent research efforts have utilised lasers due to the promise of...
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Worapon Jenpanichwong (University of Sydney)AIP | Condensed Matter & Materials (CMM)Poster
Topological materials have been widely studied because of their novel properties that enable robust quantum transport phenomena along the edges and surfaces of the materials. These effects contribute to many possible technological developments, especially in quantum technology$^{1,2}$.
Bi$_2$Se$_3$, one of the most selected topological insulators that was discovered to have a...
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Mr Shreyas J. Kashyap (School of Electrical Engineering & Telecommunications, UNSW Sydney)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Optical sensors operating in extreme environments, such as aircraft engines, nuclear reactors and combustors, require materials capable of maintaining stable refractive-index modifications at elevated temperatures over extended periods. Femtosecond laser writing has emerged as a promising technique to induce such modifications inside glasses; however, preventing their thermal erasure remains a...
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AIP | Quantum Science and Technology (QST)Poster
Fault-tolerant quantum computing (FTQC) will require millions of interconnected qubits operating together with high fidelities. Qubits in silicon quantum dots promise high qubit density and integration with on-chip classical control electronics. A key barrier to scaling this technology is device overheating: above 1K, qubit coherence declines significantly. Increased power dissipation in...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
The thermionic emission properties of optically driven nodal ring semimet-
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als (NRSMs) are investigated. Under off-resonant laser irradiation, the system can
be transformed into different topological phases, including Weyl semimetals (WSMs)
and semi-Dirac semimetals (SDSMs). The resulting modifications to the electronic
dispersion and density of states strongly influence the thermionic... -
AIP | Theoretical Physics (TPG)Poster
Black hole thermodynamics provides a useful way to test whether different quantum-gravity-inspired resolutions of the classical singularity lead to distinguishable physics. In this talk, I will discuss the thermodynamics of polymerized vacuum regular black holes in asymptotically anti-de Sitter spacetime, with emphasis on their Hawking–Page phase structure.
The construction extends an...
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Griffin Stacey (Monash University)COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Graphene's excellent optoelectronic properties have been exploited to achieve sensitive broadband photodetection via the hot-electron photothermoelectric effect. We propose that the same effect could be utilised for mid-infrared thermoradiative energy harvesting with high internal quantum efficiency in graphene.
As a step towards this goal, we have fabricated a high-quality graphene...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
The high radiative efficiencies and strong absorption coefficients of van der Waals materials position them well for optoelectronic power generation via radiative exchange. These materials have been investigated for use in photovoltaic solar cells, however, their use in infrared thermoradiative and thermophotovoltaic applications remains unexplored. In this study, we fabricate a black...
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ANZOS | Photonics and Optics (ANZCOP)Poster
In this work, we propose a three-dimensional (3D) nonlinear optical imaging scheme for the spectroscopic characterization of drug delivery system (DDS) nanoparticles based on a nonlinear confocal microscope. In recent years, numerous drug delivery system (DDS) nanoparticles, such as liposomes and micelles, have been engineered to achieve drug release by utilizing pH-responsive structural...
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AIP | Quantum Science and Technology (QST)Poster
Quantum low-density parity-check (qLDPC) codes have emerged as a promising approach for realizing low-overhead logical quantum memories. Recent theoretical developments have established shift automorphisms as a fundamental building block for completing the universal set of logical gates for qLDPC codes. However, practical challenges remain because the existing SWAP-based shift automorphism...
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ANZOS | Quantum Computing and Quantum Information (ANZCOP QCQI)Poster
Abstract
The nonlocal correlations between entangled particles establish quantum entanglement as a fundamental resource for quantum information processing, including quantum communication, computing, and metrology [1]. Compared to conventional Gaussian entangled states, such as the two-mode squeezed vacuum state (TMSV), non-Gaussian entangled states generated via operations like photon...
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238. To Griffiths or not to Griffiths: How Electromagnetism is taught in Higher Year Physics CoursesDr Amy Geddes (University of New South Wales), Elizabeth Angstmann (University of New South Wales), Prof. John Debs (The Australian National University), Prof. Maria Parappilly (Flinders University), Dr Mohammad Rafat (University of Sydney)AIP | Physics Education (PEG)Contributed Oral
Higher-year physics students widely regard electromagnetism as one of the most conceptually and mathematically demanding areas of the undergraduate curriculum. It is typically taught at a high level of abstraction, with concepts developed mathematically before being connected to physical examples. To succeed, students must move fluently between multiple representations, including integral and...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Distributing entanglement is pivotal for sharing quantum information over long distances via entanglement swapping protocols, enabling applications in communication, metrology, and computing. Entanglement swapping protocols consist of performing a Bell-state measurement (BSM) at a central station to share entanglement between two separate parties. Fully-optical entanglement swapping protocols...
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AIP | Nuclear and Particle Physics (NUPP)Invited talk
High-energy collider events involving the production and decays of top quarks present a unique and formidable combination of theoretically challenging physics effects: final states with large numbers of jets, heavy-quark fragmentation, sequential resonance decays with GeV-scale widths, and non-trivial confinement effects exacerbated by the top quarks themselves carrying QCD colour charges....
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
Climate change has become one of the most pressing environmental challenges worldwide. The carbon dioxide reduction reaction (CO2RR), which converts CO2 into value-added chemicals using renewable energy, is considered a promising strategy for carbon recycling and sustainable energy development. However, the high thermodynamic stability and chemical inertness of CO2 make its adsorption and...
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Jahan McLeod (The University of Sydney)AIP | Condensed Matter & Materials (CMM)Contributed Oral
Over the last few decades, topological insulators have emerged as an important class of materials for quantum technologies, offering robust conducting surface states with potential applications in low-energy field-effect transistors and heterogeneous catalysis.$^{1-3}$ Recent studies of two-dimensional (2D) materials known as transition metal dichalcogenides (TMDs) have identified topological...
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Prof. Archil KobakhidzeAIP | Nuclear and Particle Physics (NUPP)Contributed Oral
I will discuss a generic, intrinsically topological phenomenon that arises in systems supporting transitions between distinct topological states, together with the corresponding fermionic zero modes. In particular, I will argue for the formation of a condensate of composite fermion operators that spontaneously breaks an anomalous symmetry. The phase of the condensate gives rise to a...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Optical fibers made from soft glasses that have minimum loss in the infrared region are gaining remarkable attention in various applications. Among the different soft glasses, ZBLAN glass which is the most common composition of zirconium fluoride-based glasses has long been thought of as a good alternative for silica fibers in telecommunications owing to its low intrinsic loss of ~0.01 dB/km...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Future quantum information systems will increasingly rely on remote processors, distributed data, and hybrid quantum-classical workflows. As access to quantum hardware moves from dedicated laboratories to cloud platforms and shared infrastructure, trust becomes both a scientific and engineering challenge: how can a user know that a remote quantum processor is the device it claims to be, and...
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AIP | Quantum Science and Technology (QST)Contributed Oral
The nitrogen-vacancy (NV) centre in diamond provides a robust platform for quantum experiments owing to the long spin coherence time of the triplet state in the NV- charge state. Nanodiamonds that host a single NV centre offer a feasible platform to demonstrate a macroscopic quantum superposition state, which possesses applications in inertial sensing and precision tests of physics. However,...
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ANZOS | Photonics and Optics (ANZCOP)Poster
Ultrashort pulsed fibre lasers operating at 2.3 µm offer opportunities in environmental sensing, biomedical technologies, and next-generation telecommunications. This wavelength range is particularly attractive for gas spectroscopy due to strong absorption features of atmospheric species including hydrogen fluoride, carbon monoxide, formaldehyde, and methane. In optical communications, sources...
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Emily Rose ReesANZOS | Photonics and Optics (ANZCOP)Contributed Oral
The GRACE-Continuity mission (a joint U.S.-German partnership) is expected to launch in 2028 and will continue the legacy of the GRACE missions by providing critical measurements of Earth mass change over time. The spacecraft use interferometry to sense the changes in satellite separation, which can be used to infer the local gravity field. This science data underpins knowledge of large-scale...
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ANZOS | Photonics and Optics (ANZCOP)Poster
Abstract
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Ultra-stable lasers are essential for optical atomic clocks, quantum sensors, precision spectroscopy, and navigation systems. Current state ofthe art frequency stabilisation techniques mainly rely on cryogenic reference cavities to suppress temperature and vibrational variation.
While these approaches are highly effective, it also increases system complexity and limit the... -
AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum foundations has advanced significantly from Bell’s theorem to the strictly stronger Local-Friendliness (LF) no-go theorem [1], providing means to test assumptions about reality underlying physical theories and thereby unveiling nature’s counterintuitive behavior. The LF theorem’s proof relies on an extension incorporating Bell’s ideas and describing observers as quantum systems,...
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ANZOS | Photonics and Optics (ANZCOP)Poster
Visible red fibre lasers remain relatively uncommon despite their importance for spectroscopy, biomedical imaging, and quantum technologies. Existing fibre-based red sources are predominantly based on Pr³⁺-doped fibres operating near 635–640 nm, while the well-established He–Ne laser provides emission at 632 nm. In contrast, efficient fibre laser source around 670 nm, remain unavailable, to...
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AIP | Astronomy (ASTRO)Contributed Oral
The quest to peer deeper into the Universe drives the development of telescopes with ever greater resolution. Interferometers offer a way to greatly increase resolution by synthesising an aperture equivalent to the distance between interferometer elements. This has been enormously successful in radio astronomy, but at optical frequencies, the shorter wavelength and inability to record photons...
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Jeffery Low (The University of Auckland)ANZOS | Photonics and Optics (ANZCOP)Poster
Optogenetics is an exciting field that combines optics with biology and genetic engineering. One of the main subjects of study in optogenetics are methods to control the activation of nerve cells with light. A device that can leverage the ability of optogenetics to control organs that are normal regulated by the parasympathetic nervous system will allow us to deliver new forms of medical...
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AIP | Physics Education (PEG)Invited talk
As generative AI tools disrupt education at all levels, physics educators must adapt to a new and rapidly changing landscape. I present a review of current educational practices and literature on the benefits and risks of generative AI use in student learning in physics, mathematics, and coding.
I focus on the impacts of cognitive offloading, the process by which people can reduce the...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Flatband lasers featuring near-dispersionless photonic bands offer a compelling pathway to overcome the band dispersion limitations inherent in conventional two-dimensional (2D) photonic crystals (PhCs) [1,2]. The near-zero photon group velocity in these bands generates an exceptionally large density of states across a broad range of in-plane wavevectors. This dramatically enhances...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Integrating Erbium trivalent ions in Silicon (Si) is the promising pathway towards telecom-compatible single photon sources with the spin degree of freedom, the quantum resource highly attractive for quantum communication and information processing [1, 2]. However, naturally occurring Si-29 in naturally abundant Si has a nonzero nuclear spin that could result in unwanted magnetic field...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Photonic neural networks promise high-bandwidth, low-latency analogue computation, but most implementations rely on spatially multiplexed mesh architectures where an N-mode operation demands $O(N^2)$ individually controlled elements, placing significant demands on chip area and electrical interconnects. Electro-optically modulated ring resonators offer a compelling alternative by encoding...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Nitrogen-vacancy (NV) centres in diamond are key enablers of room-temperature quantum sensing and computing technologies already targeted for commercialisation by startups around the world (e.g., Quantum Brilliance, Phasor Quantum, Qnami). These technologies face two universal challenges: weak optical input and output spin-readout signals at nanoscale dimensions, and noise that degrades signal...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Exciton-polaritons are quasiparticles that arise in semiconductors from the strong coupling between light (microcavity photon fields) and matter (bound electron-hole pairs called excitons). Being bosonic particles, polaritons undergo Bose-Einstein condensation (BEC) - a phase transition wherein a large number of particles collectively occupy the ground state of the system. Since polaritons...
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AIP | Atomic and Molecular Physics (ATMOP)Poster
High-precision spectroscopy of atomic species provides a powerful means of testing quantum electrodynamics(QED) and its theoretical frameworks. Helium has one of the simplest atomic structures, and QED calculations for helium have advanced to include corrections up to order $m\alpha^7$ [1]. Consequently, precision spectroscopy of helium has become the focus of many groups worldwide [2-6]. At...
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Teresa Dalle Nogare (University of Sydney)AIP | Physics Education (PEG)Contributed Oral
Computational skills are a core component of modern physics education, underpinning the use of computers for simulations, data analysis, and interpretation of complex physical systems.
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As physics graduates are expected to work with complex data and computational models, undergraduate curricula must provide a logical progression of computational skills that enables students to move from basic... -
Simon Yung (Australian National University)AIP | Quantum Science and Technology (QST)Invited talk
Quantum estimation theory provides the basis for quantum metrology. However, quantum multiparameter estimation is fundamentally limited by the uncertainty principle. This manifests as a trade-off between attainable estimation precisions, because the optimal measurements for each parameter are generally incompatible. Using quantum Cramér–Rao bounds, we analysed these trade-offs and compared...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Lasers are ubiquitous in our daily lives from industry, communication to medicine. The scale of lasers has also shrunk down to micron and nanoscales. As the scale of laser become smaller, the functions of lasers have also been redefined by transforming living biologicals into micro- and nanoscale lasers, so called living lasers. Such tiny lasers could therefore be used to detect or monitor...
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AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
The ATLAS Experiment’s trigger system works in real-time to accept interesting events with specific energies and structures, motivated by known physics models. While this traditional method has allowed for world-leading datasets and breakthroughs such as the discovery of the Higgs boson, this model-dependence might risk excluding unanticipated new physics that doesn’t fit our current trigger...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
The generation of coherent frequency combs via the excitation of temporal cavity solitons in passive Kerr resonators is a well-established phenomenon. While temporal cavity solitons offer broadband spectra, they can suffer from temporal jitter and require stringent control of parameters for stable operation. Alternatively, pulsed-driven Kerr resonators operating in the normal dispersion regime...
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ANZOS | Laser Physics and Active Photonics (ANZCOP LPAPH)Invited talk
High-order transverse-mode lasers are important tools for a wide range of emerging applications, motivating continued efforts toward simple and flexible control of structured laser fields. Recently, we have developed a general approach for arbitrary high-order mode generation based on cavity-symmetry control and selective mode excitation. By deliberately introducing intracavity astigmatism,...
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Hongji Sun (Shenzhen Technology University Future Technology School)ANZOS | Photonics and Optics (ANZCOP)Poster
Perfect vortex beams (PVBs) effectively break the restriction where the annular ring size expands with increasing topological charges by reshaping the spatial spectrum of conventional orbital angular momentum (OAM) modes. However, conventional generation approaches typically rely on complex extra-cavity modulation systems, and the PVBs are strictly constrained to the Fourier plane, precluding...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Fabry-Pérot interferometers are widely used as narrowband spectral filters for wavelength discrimination, where the passband wavelength is determined by the optical cavity spacing between two highly reflective Distributed Bragg Reflectors (DBRs) and the passband is swept across wavelength ranges by varying that spacing. In the infrared spectral range, such devices are commonly fabricated using...
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AIP | Condensed Matter & Materials (CMM)Invited talk
Moiré superlattices — the long-wavelength patterns that emerge when atomically thin crystals are stacked with a small twist or lattice mismatch — have become a versatile means of reshaping the electronic structure of two-dimensional materials. Yet the physics accessible in these systems is largely dictated by the geometries of the constituent crystals, restricting the design space to what...
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Ben Wylie-van Eerd (Paihau - Robinson Research Institute, Victoria University of Wellington)AIP | Quantum Science and Technology (QST)Poster
High density superconducting memory systems are one of the un-met requirements for large scale quantum computing systems. The integration of ferromagnetic materials alongside the conventional superconductors (Nb, Al) offers potential solutions, particularly regarding density. However, one of the challenges inherent in developing these ferromagnetic and superconducting systems is the need to...
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AIP | Condensed Matter & Materials (CMM)Poster
Optical chirality is a consistent topic of interest due to its diverse applications in medical research, particularly for drug design where proteins frequently exhibit distinct enantioselectivity toward binding partners [1,2]. Meta-optical designs can significantly enhance structural chiral responses by altering intrinsic symmetry using techniques such as chiral meta-atoms and monoclinic...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
What happens when a solid starts flowing like a superfluid, yet still creaks like a crystal? This is the remarkable behaviour of a supersolid — a phase of matter that combines crystalline order with frictionless flow. Once a long-standing theoretical curiosity, supersolidity has now been realised in an exceptionally clean and tunable platform: dilute dipolar Bose–Einstein condensates of highly...
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Andrey A. Sukhorukov (Australian National University, Australia)ANZOS | Quantum and Atom Optics (ANZCOP QAO)Contributed Oral
Polarimetry is a fundamental optical characterisation technique that reveals material-specific properties such as internal structure, molecular composition, and anisotropy. Whereas classical approaches rely on intensity averages, quantum polarimetry enables phase-sensitive measurements at ultra-low light levels, an advantage for fragile or photosensitive samples. Additionally, quantum...
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ANZOS | Photonics and Optics (ANZCOP)Poster
Controlled modification of diamond surfaces is important for quantum technologies, biosensing, photonics, and electronic devices. Conventional processing methods may introduce surface damage or contamination and may provide limited control at shallow removal depths. Previous studies have reported UV laser etching of diamond, with the etch rate increasing approximately quadratically with laser...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Quantum sensing with undetected photons is a technique in which a sample is probed by photons of one wavelength, while information about the sample is extracted by measuring photons of a different wavelength that never interacts with it. This approach has enabled significant experimental advances in spectroscopy, microscopy, and bio-sensing. Despite this progress, a detailed theoretical...
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ANZOS | Photonics and Optics (ANZCOP)Poster
In recent years, failures caused by aging infrastructure have become more common. However, visual inspections via human eyes still represent a major part of the inspection methods for such facilities. These inspections depend on heavily experience and intuition of the inspector, and they take a lot of working time. Therefore, this work introduces a non-destructive inspection system that...
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AIP | Condensed Matter & Materials (CMM)Poster
Carbon nanotubes (CNTs) provide a unique one-dimensional platform for investigating mesoscopic superconductivity in quantum conductors. When contacted by superconducting electrodes, CNTs form Josephson junctions with only a few spin-degenerate transport channels, making them an ideal system to probe superconducting phenomena at the microscopic level. However, despite this promise, the reliable...
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AIP | Condensed Matter & Materials (CMM)Poster
High temperature superconductors (HTSCs) have exhibit a wealth of fascinating macroscopic phases that can change abruptly under slight variations in experimental parameters. Unlike conventional BCS superconductors, the HTSCs are not fully theoretically understood, with the nature of the glue enabling Cooper pairing and the origin of the pseudogap state yet to be definitively found, among other...
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Andrew Groszek (The University of Queensland)AIP | Quantum Science and Technology (QST)Contributed Oral
All modern wireless communication technologies are based on electromagnetism. However, electromagnetic signals are readily susceptible to screening and blocking, so their availability cannot be guaranteed in adverse environments.
This raises a fundamental question: Can information be transmitted through an unblockable channel? Here we show that gravity, under physically realistic...
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ANZOS | Optical Computing and AI (ANZCOP OCAI)Contributed Oral
Artificial intelligence is increasingly deployed in safety-critical settings, from medical diagnosis to autonomous systems, where models must not only make accurate predictions but also recognize when their predictions are uncertain. However, conventional neural networks are largely deterministic and cannot reliably distinguish uncertainty caused by noisy or ambiguous inputs from uncertainty...
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AIP | Condensed Matter & Materials (CMM)Poster
Schelling’s 1971 model of segregation proposed a simple rule similar to the Ising model of ferromagnetism to determine what minimum percentage for preference of sameness in an agent’s neighbours would lead to global segregation. The surprising result that a mild preference was sufficient to cause the emergence of an equilibrium state of segregated communities speaks volumes in today's...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
High-power single-frequency continuous-wave lasers are essential for a range of applications in precision spectroscopy, metrology, optical clocks, and quantum technologies. However, achieving stable single-frequency operation at high power is often challenging because nonlinear optical processes can generate unwanted frequency components that degrade spectral purity and stability. In...
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Luke Trainor (University of Otago)ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
The narrowness of the optical transitions of rare-earth-ion dopants makes them highly sensitive probes of their environment. When rare-earth ions are doped into a magnetic crystal, they display an enriched optical spectrum, with features that can only be explained by including the spins of the host crystal in the model. We explored optical absorption spectroscopy of erbium-doped Gd$_2$SiO$_5$,...
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AIP | Physics Education (PEG)Contributed Oral
Student evaluations provide valuable insights into the teaching and learning experience that extend well beyond quantitative metrics. With approximately 800 students enrolled each semester in first-year physics units at the School of Physics, University of Sydney, maintaining a high-quality learning experience at scale is an ongoing priority. Within this context, tutors play a pivotal role....
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Dr Robert Renz Marcelo Gregorio (Australian National University)AIP | Nuclear and Particle Physics (NUPP)Contributed Oral
Radon remains one of the dominant backgrounds limiting the sensitivity of rare-event physics experiments searching for dark matter, neutrinoless double beta decay, and other exotic phenomena. The radioactive decay of radon progeny can produce signals that mimic the interactions of interest, making the detection and control of radon crucial for achieving the sensitivity required by...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
Antiferromagnetic materials constitute an important topic of contemporary condensed matter research and their use encompasses modern spintronics, data storage, etc. Importantly, layered antiferromagnetic copper(II) oxides constitute parent compounds of high-Tc superconductors and superconductivity is achieved via chemical or physical doping to these materials. Oxocuprates(II) feature very...
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AIP | Quantum Science and Technology (QST)Contributed Oral
Quantum resources such as magic, quasi-probabilistic negativity and entanglement are necessary for quantum advantage. However, the presence of noise provides a mechanism for the potential decay of quantum resources and the onset of efficient classical simulability. Classical simulations of noisy quantum circuits are instrumental to our understanding of the behavior of real-world quantum...
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Juliana Avtarovski (University of Wollongong)AIP | Condensed Matter & Materials (CMM)Contributed Oral
Clinoatacamite [Cu2Cl(OH)3] has long been a subject of intense interest in the study of frustrated quantum magnetism due to its distorted kagome lattice and complex magnetic phase diagram. Despite this interest, the nature of its magnetism remains partially inconclusive, particularly between 6.4 K and 18.1 K [1] where long-range order with propagation vector q_m= (-0.5, 0, 0.5) is present [2]....
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AIP | Nuclear and Particle Physics (NUPP)Poster
The quark-gluon vertex is an indispensable component of quantum chromodynamics. It is one of the four fundamental interaction vertices of the theory, encoding the interactions between quarks and gluons. Despite the significance of the quark-gluon vertex, the full, non-perturbative structure is incomplete.
The tensor structure of the quark-gluon vertex can be decomposed into a...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
Inelastic neutron scattering (INS) is a powerful technique for investigating elementary excitations in condensed matter, including lattice dynamics, spin waves, and crystal electric fields. Traditionally, triple-axis spectrometers (TAS) are the premier instruments designed for these measurements. At the Australian Centre for Neutron Scattering (ACNS) within ANSTO, the thermal-neutron TAS...
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AIP | Quantum Science and Technology (QST)Contributed Oral
To an observer with limited memory, even highly structured processes can appear random. This points to a fundamental interplay between randomness and temporal correlations present in a complex system's behavior. In characterizing this interplay, it is crucial to evaluate how much of a system's behavior is irreducibly random, and the minimum memory cost to simulate it perfectly. Classically,...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesContributed Oral
Negative luminescence is the symmetric process to electroluminescence, the mechanism by which light-emitting diodes (LEDs) produce light, wherein the mid-infrared (MIR) semiconductor photodiode emit less radiation under reverse bias than it would at equilibrium. Here, we demonstrate the use of negative luminescence for a new covert communications method in which photon emission is rapidly...
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AIP | Solar Terrestrial and Space Physics (STSP)Contributed Oral
Nonlinear force-free field (NLFFF) models are widely used to investigate coronal magnetic field structure in solar active regions, but methods to validate them remain limited. Here, we use Gaussian separation, recently applied to solar vector magnetogram data, to assess the accuracy of NLFFF models constructed with two methods: optimization and the current-field iteration (CFIT) implementation...
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Francesco Campaioli (RMIT University)AIP | Quantum Science and Technology (QST)Contributed Oral
Validation and calibration are essential for the development of quantum computers and simulators, yet they remain challenging. Tomography provides complete information about a device but quickly becomes impractical, whereas randomized benchmarking offers a cheaper alternative that relies on simplifying assumptions about the underlying noise. These tools were developed primarily with quantum...
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AIP | Quantum Science and Technology (QST)Contributed Oral
A Gibbs state assigns higher probability to low-energy configurations and lower probability to high-energy ones, making it a natural tool for searching for good solutions of optimisation problems. Classically, this idea appears in simulated annealing, where one slowly lowers the temperature using Markov chain Monte Carlo methods. Quantum computation offers the possibility of speeding up parts...
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Coarse-graining a macroscopic body of $N\gg1$ identical subsystems makes collective observables self-average, yet for any nonlinear observable $f(\hat A)$ the strict inequality $\langle f(\hat A)\rangle\neq f(\langle\hat A\rangle)$ leaves a residual that is not washed out by coarse-graining and is fixed by the variance $\sigma^2$ of the underlying state.
In a gravitational potential the...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
The vibrational density of states (VDOS), g(ω), is a fundamental property governing the specific heat and thermal transport of materials. For more than a century, the Debye model has provided the foundation for understanding lattice vibrations in bulk crystalline solids, predicting a low-energy scaling of g(ω) ∝ ω².
In liquids, however, stable phonon modes are replaced by instantaneous...
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Dr Corey Plowman (Curtin University)AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
The semi-classical molecular convergent close-coupling (SC-MCCC) approach has been applied to proton collisions with molecular hydrogen in the ground electronic and vibrational state. Cross sections for electron loss and electron capture agree well with the experimental data in the intermediate energy range where coupling between electronic reaction channels is strong and previously available...
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AIP | Quantum Science and Technology (QST)Contributed Oral
The surface code is a promising route towards large-scale quantum computing, requiring only nearest-neighbour gates amenable to superconducting hardware. However, surface codes incur large qubit overheads. Novel quantum low-density parity check (qLDPC) codes promise to reduce overheads but require long-range connections that are difficult to achieve on superconducting platforms. Here, we...
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Dr Nida Haram (Joint Attosecond Science Lab, National Research Council and University of Ottawa, ON K1A 0R6, Canada)AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
Polarization and correlation effects in molecular photodynamics are intimately tied to the coupled motion of electrons and nuclei. Understanding these interactions on their natural femtosecond timescales requires measurements that resolve both electronic structure and nuclear configuration simultaneously. Here, we present a complete imaging study of the UV-initiated dissociation of...
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AIP | Condensed Matter & Materials (CMM)Contributed Oral
Persistent spectral-holeburning is ubiquitous in optical spectroscopy, where it’s exploited for a myriad of applications in both classical and quantum signal processing, including laser stabilisation [1], real-time wideband spectral analysis [2], and quantum memory [3].
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Prior to our work, however, spectral-holes in the microwave domain had only been observed to last microseconds or less [4,... -
Graeme Berk (Nanyang Technological University)AIP | Quantum Science and Technology (QST)Contributed Oral
Prediction is a foundational task across the quantitative sciences and is precisely understood in the classical world. The universe, however, is fundamentally quantum. Then, what does it mean to 'predict' a future whose proper description is neither a definite state nor a probability distribution, but a quantum state, and what resources are required?
The first question turns out to be...
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Clare Kenyon (Monash University)AIP | Physics Education (PEG)Contributed Oral
Understanding how non major undergraduates conceptualise astronomical sizes and distances is critical for effective introductory teaching. We report a pre instruction diagnostic survey (n = 220) from a first year, first semester breadth astronomy unit. The instrument used a scale model framing (1 cm “blueberry” Earth) to elicit numeric estimates for Moon, Sun, Proxima Centauri, Milky Way,...
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AIP | Atomic and Molecular Physics (ATMOP)Contributed Oral
How many grains are there in a heap of sand? A lone grain is far from enough, and adding a second or third makes little difference, yet beyond some vague threshold we instinctively call the collection of grains a "heap". The same question can be posed in the quantum realm: How many particles are needed to form a many-body quantum system?
This question is now experimentally accessible in...
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Roland Crocker (Australian National University)
Most ~1-10 GeV hadronic cosmic rays accelerated in star-forming galaxies will eventually escape the relatively dense ISM gas and leak into the circumgalactic medium (CGM). What happens to them thereafter and do they do anything important in this low density environment? I will show that these CRs are, in fact, important: using a new semi-analytic model we have developed over the last few years...
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AIP | Atomic and Molecular Physics (ATMOP)Poster
The most fundamental description of the interaction between matter and light lies within the theoretical framework of quantum electrodynamics (QED). For atomic and molecular systems, QED calculations require complicated non-perturbative approaches that incorporate all orders of the coupling constant $Z\alpha$, where $Z$ is the nuclear charge and $\alpha$ is the fine-structure constant....
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
Quantitative phase imaging (QPI) provides nanometric phase sensitivity for label-free mapping of biological samples, but its intrinsic contrast mechanism lacks molecular specificity. Here, we present an interferometric imaging approach that overcomes this limitation through plasmon-assisted photothermal labeling. Gold nanoparticles excited by time-modulated illumination at their plasmonic...
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ANZOS | Photonics and Optics (ANZCOP)Contributed Oral
The CSIRO Mineral Resources Sensing and Sorting Group has developed a patented X-ray diffraction (XRD) technology, that moves laboratory scale EDXRD to on-stream mineral analysis in processing plants. The removal of inefficient and labour-intensive laboratory-based XRD is imperative for a mine site as this allows stream mineralogy to be monitored in real-time.
Alongside XRD, CSIRO has...
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