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

Session

AIP QST: Quantum materials & light-matter interfaces

QST

10 Dec 2026, 14:00

Belinda Hutchinson Building (The University of Sydney )

496. An Eigenstate Solution for Crystal Field Modelling of Ytterbium Ions

Mr Lasse Sweetland (University of Sydney)

10/12/2026, 14:00

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...

720. Engineered Crystal Systems for Erbium Quantum Hardware

Dr Timothy Newman (University of Sydney)

10/12/2026, 14:15

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],...

349. Generation of quantum-relevant Er sites in Silicon photonic waveguides

Mrigendra Yadav (UNSW)

10/12/2026, 14:30

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...

322. Evolution of quantum defects through pressure-induced phase changes

David Broadway (RMIT University)

10/12/2026, 14:45

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...

545. Near-infrared optically addressable spins and single photon emission in hexagonal boron nitride

Fatin Al Sadab (RMIT University)

10/12/2026, 15:00

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...

184. A Q-Band Room-Temperature Solid-State Maser

Tom Day (School of Electrical Engineering and Telecommunications, UNSW Sydney, Australia)

10/12/2026, 15:15

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 –...