26th Australian Institute of Physics Congress and the Australian and New Zealand Conference on Optics and Photonics

Session

AIP QST: Trapped-ion dynamics & quantum control

QST

10 Dec 2026, 11:00

Belinda Hutchinson Building (The University of Sydney )

693. Implementing a Mølmer–Sørensen Interaction in Two-Dimensional Ion Crystals in a Penning Trap

Gustavo Cafe De Miranda (University of Sydney)

10/12/2026, 11:00

AIP | Quantum Science and Technology (QST)

Contributed Oral

Laser-cooled and trapped two-dimensional (2D) crystals comprising
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),...

623. Programmable site-selective spin control in rotating Penning-trap ion crystals

Nihar Makadia (The University of Sydney)

10/12/2026, 11:15

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...

207. Regimes of fast entanglement in trapped-ion quantum computers

Isabelle Savill-Brown (The Australian National University)

10/12/2026, 11:30

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...

444. Singularity-free dynamical invariants-based quantum control

Ritik Sareen (RMIT University)

10/12/2026, 11:45

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...

546. Reconstructing the phonon distribution of trapped ions out of the Lamb-Dicke regime

Prachi Nagpal (University of Sydney)

10/12/2026, 12:00

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...

93. Optimising a numerical simulator connects to results in quantum control theory

Alex Tritt (Monash University School of Physics & Astronomy)

10/12/2026, 12:15

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...