ORCID Profile
0000-0003-4995-8212
Current Organisations
University of Queensland
,
Defence Science and Technology Group
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Quantum Physics | Quantum Optics | Quantum Information, Computation and Communication
Expanding Knowledge in the Physical Sciences | Emerging Defence Technologies | Expanding Knowledge in Engineering |
Publisher: AIP Publishing
Date: 28-10-2019
DOI: 10.1063/1.5114655
Abstract: The growth of 3D imaging across a range of sectors has driven a demand for beam steering technology. Fields as erse as autonomous vehicles and medical imaging can benefit from a high speed, adaptable method of beam steering. We present a monolithic, submicrosecond electro-optic switch as a solution toward the need for reliability, speed, dynamic addressability, and compactness. Here, we demonstrate a laboratory-scale, solid-state light detection and ranging system, using the electro-optic switch to launch modulated coherent light into free space and then to collect the reflected signal. We use coherent detection of the reflected light to simultaneously extract the range and axial velocity of targets at each of the several electronically addressable output ports.
Publisher: American Association for the Advancement of Science (AAAS)
Date: 28-06-2019
Abstract: Many-body systems generally become more disordered as more energy is pumped into them. A curious exception to this rule was predicted in the context of turbulent flow by the physical chemist Lars Onsager. He suggested that the entropy of certain two-dimensional (2D) systems can decrease with increasing energy, corresponding to an effective negative temperature. Using 2D Bose-Einstein condensates of atoms, Gauthier et al. and Johnstone et al. put Onsager's theory to the test. They provided energy to the system by perturbing the condensate, creating vortices and antivortices. With increasing energy, the system became more ordered as clusters containing either only vortices or only antivortices emerged. Science , this issue p. 1264 , p. 1267
Publisher: AIP Publishing
Date: 11-2004
DOI: 10.1063/1.1808059
Abstract: Two commonly used cold cathode discharge sources to create rare gas metastable atomic beams are experimentally compared with respect to the output flux and the most probable velocity of the resulting beams. The systems are characterized with the same detection system thereby enabling an unambiguous performance comparison. The results of the experiments show that there is a clear distinction between the output beam characteristics of the beam sources.
Publisher: The Optical Society
Date: 12-10-2016
Publisher: IOP Publishing
Date: 28-03-2014
Publisher: IEEE
Date: 2002
Publisher: IOP Publishing
Date: 15-08-2014
Publisher: IEEE
Date: 2004
Publisher: American Physical Society (APS)
Date: 16-02-2022
Publisher: OSA
Date: 2017
Publisher: IOP Publishing
Date: 07-03-2003
Publisher: Elsevier BV
Date: 02-2001
Publisher: IOP Publishing
Date: 14-08-2004
Publisher: Walter de Gruyter GmbH
Date: 2012
DOI: 10.2478/S11534-012-0108-X
Abstract: Cold atom experiments often use images of the atom clouds as their exclusive source of experimental information. The most commonly used technique is absorption imaging, which provides accurate information about the shapes of the atom clouds, but requires care when seeking the absolute atom number for small atom s les. In this paper, we present an independent, absolute calibration of the atom numbers. We directly compare the atom number detected using dark-ground imaging to the one observed by fluorescence imaging of the same atoms in a magneto-optical trap. We normalise the signal using single-atom resolved fluorescence imaging. In order to be able to image the absorption of the very low atom numbers involved, we use diffractive dark-ground imaging as a novel, ultra-sensitive method of in situ imaging for untrapped atom clouds down to only 100 atoms. We demonstrate that the Doppler shift due to the acceleration of the atoms by the probe beam has to be taken into account when measuring the atom-number.
Publisher: American Vacuum Society
Date: 25-08-2021
DOI: 10.1116/5.0026178
Abstract: Atomtronics deals with matter-wave circuits of ultracold atoms manipulated through magnetic or laser-generated guides with different shapes and intensities. In this way, new types of quantum networks can be constructed in which coherent fluids are controlled with the know-how developed in the atomic and molecular physics community. In particular, quantum devices with enhanced precision, control, and flexibility of their operating conditions can be accessed. Concomitantly, new quantum simulators and emulators harnessing on the coherent current flows can also be developed. Here, the authors survey the landscape of atomtronics-enabled quantum technology and draw a roadmap for the field in the near future. The authors review some of the latest progress achieved in matter-wave circuits' design and atom-chips. Atomtronic networks are deployed as promising platforms for probing many-body physics with a new angle and a new twist. The latter can be done at the level of both equilibrium and nonequilibrium situations. Numerous relevant problems in mesoscopic physics, such as persistent currents and quantum transport in circuits of fermionic or bosonic atoms, are studied through a new lens. The authors summarize some of the atomtronics quantum devices and sensors. Finally, the authors discuss alkali-earth and Rydberg atoms as potential platforms for the realization of atomtronic circuits with special features.
Publisher: IOP Publishing
Date: 20-09-2001
Publisher: AIP Publishing
Date: 08-2014
DOI: 10.1063/1.4892375
Abstract: 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 different coil sizes, while providing large surfaces for low-pressure (0.12 bar) water cooling. The coils have turn densities of ∼5 mm−1 and achieve a maximum of 377 G at 2.1 kW driving power, measured at a distance 37.9 mm from the axial center of the coil. The coils achieve a steady-state temperature increase of 36.7°C/kW.
Publisher: IOP Publishing
Date: 25-11-2016
Publisher: IOP Publishing
Date: 28-11-2011
Publisher: IOP Publishing
Date: 30-08-2001
Publisher: Elsevier
Date: 2021
Publisher: IOP Publishing
Date: 02-02-2006
DOI: 10.1088/0957-4484/17/4/054
Abstract: Iron structures with dimensions of the order of the minimum domain size (∼50 nm at room temperature) may provide us with a new high-density data storage method. Limitations have been observed in existing depositional atom lithography schemes for producing these structures. We present a proof-in-principle experiment using an alternative scheme based upon direct exposure metastable neon-atom lithography. Iron structures with dimensions of the order of 7.5 µm are produced by this method. Extension of this work to the application of standing-wave atom lithography and laser cooling flux enhancement techniques is discussed as a method for reducing dimensions to a size equating to a dot array density of around 0.1 Gbit mm(-2).
Publisher: American Physical Society (APS)
Date: 27-12-2019
Publisher: IOP Publishing
Date: 03-2016
Publisher: IOP Publishing
Date: 02-08-2016
Publisher: American Physical Society (APS)
Date: 05-07-2018
Start Date: 2018
End Date: 06-2025
Amount: $31,900,000.00
Funder: Australian Research Council
View Funded Activity