Dr. Thomas A Bell

Postdoctoral Research Fellow

Thomas completed his PhD with the Bose-Einstein Condensate Laboratory at the Univeristy of Queensland in 2020, before commencing a Postdoctoral Research Fellowship. His research focussed on engineering spatially controlled optical potentials suitable for dynamically manipulating the movement of a particular family of superfluid, called Bose-Einstein Condensates. He pioneered the density based feedforward method for controlling the spatial density distribution, and provided new foundational insights regarding the trapping limitations of potentials formed using the method of time-averaging. These results support ongoing efforts to develop quantum enhanced metrological devices and continuously replenishing matterwave sources.

2021

Ring shaped optical trap formed using a digital micro-mirror device.
Gauthier Guillaume et al, 2021
Adv. At. Mol. Opt. Phys., 70, pp. 1-101

All light has structure, but only recently it has become possible to construct highly con- trollable and precise potentials so that most laboratories can harness light for their spe- cific applications.

2019

Superfluid Dumbbell
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.

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.

2018

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

2016

Interferometric measurements with matter waves are established techniques for sensitive gravimetry, rotation sensing, and measurement of surface interactions, but compact interferometers will require techniques based on trapped geometries.

2014

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.