ARC Centre of Excellence for Engineered Quantum Systems (EQUS) (2011–2022)

Abstract: The future of technology lies in controlling the quantum world. The ARC Centre of Excellence for Engineered Quantum Systems (EQuS) will deliver the building blocks of future quantum technologies and, critically, ensure Australian primacy in this endeavour. Three strategic research programs will target Quantum Measurement and Control; Synthetic Quantum Systems and Simulation; and Quantum-Enabled Sensors and Metrology. Within these programs, our Centre will exploit the deepest principles and resources of quantum physics to solve specific problems in engineering, chemistry, biology and medicine, stimulating the Australian scientific and engineering communities to exploit (and benefit from) transformative quantum devices.

Universal dynamics in the expansion of vortex clusters in a dissipative two-dimensional superfluid

Stockdale Oliver R. et al, 2020

Physical Review Research, 2, 3

A large ensemble of quantum vortices in a superfluid may itself be treated as a novel kind of fluid that exhibits anomalous hydrodynamics.

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Quantitative Acoustic Models for Superfluid Circuits

Gauthier Guillaume et al, 2019

Physical Review Letters, 123, 26

We experimentally realize a highly tunable superfluid oscillator circuit in a quantum gas of ultracold atoms and develop and verify a simple lumped-element description of this circuit.

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Giant vortex clusters in a two-dimensional quantum fluid

Gauthier Guillaume et al, 2019

Science, 364, 6447, pp. 1264-1267

Adding energy to a system through transient stirring usually leads to more disorder. In contrast, point-like vortices in a bounded two-dimensional fluid are predicted to reorder above a certain energy, forming persistent vortex clusters.

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Phase and micromotion of Bose-Einstein condensates in a time-averaged ring trap

Bell Thomas A. et al, 2018

Physical Review A, 98, 1

Rapidly scanning magnetic and optical dipole traps have been widely utilized to form time-averaged potentials for ultracold quantum gas experiments.

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Mesoscopic Dynamical Differences from Quantum State Preparation in a Bose-Hubbard Trimer

Olsen M. K., Neely T. W. and Bradley A. S., 2018

Physical Review Letters, 120, 23

Conventional wisdom is that quantum effects will tend to disappear as the number of quanta in a system increases, and the evolution of a system will become closer to that described by mean-field classical equations.

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Roadmap on structured light

Rubinsztein-Dunlop Halina et al, 2017

Journal of Optics, 19, 1, pp. 13001

Structured light refers to the generation and application of custom light fields. As the tools and technology to create and detect structured light have evolved, steadily the applications have begun to emerge.

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Configurable microscopic optical potentials for Bose-Einstein condensates using a digital-micromirror device

Gauthier Guillaume et al, 2016

Optica, 10, 3, pp. 1136-1143

The development of novel trapping potentials for degenerate quantum gases has been an important factor driving experimental progress in the field. The introduction of spatial light modulators (SLMs) into quantum gas laboratories means that a range of configurable geometries are now possible.

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Note: High turn density magnetic coils with improved low pressure water cooling for use in atom optics

McKay Parry Nicholas et al, 2014

Review of Scientific Instruments, 85, 8, pp. 86103

We describe a magnetic coil design utilizing concentrically wound electro-magnetic insulating (EMI) foil (25.4 μm Kapton backing and 127 μm thick layers). The magnetic coils are easily configurable for differentcoil sizes, while providing large surfaces for low-pressure (0.12 bar) water cooling.