Digital-micromirror patterned BECs

This new machine is built around a small glass vacuum cell that allows high-resolution patterning of confining potentials and imaging of resulting atom configurations, while producing large atom number condensates (4x106). We trap atoms in a combination of optical and magnetic fields, with optical confinement given by a 1920X1200 digital micromirror device (DMD). The achieved high resolution of the microscope objectives allows us to pattern the density of our BECs with high precision. 

DMD Collage

The DMD is imaged to the atoms where it is crossed with a vertically confining sheet:

Imaging system

We are exploring several areas of research on this apparatus:

  • Superfluid transport
  • Configurable optical lattices
  • Anharmonic potentials
  • Active particle transport, atom pumps

We are currently focusing on 87Rb BECs,  but are also able to utitilise a second bosonic atomic species, 41K. 

Optimised trapping technology for atomtronic circuits and biological systems (2017)

With our succesful implementation of DMD-based optical trapping, we received a seed funding grant to collaborate with Dr. Jinyang Liang of INRS (Quebec). This goal of this grant was to develop techniques for the optimisation of greyscale DMD potentials.

Making, Probing, and Understanding Two-Dimensional Quantum Turbulence

Marsden Fund (Wellington) grant#UOO1726 (2018-2021), CI Dr Ashton Bradley, PIs Dr Tyler W Neely and Prof. Brian P Anderson (University of Arizona). 

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.

ARC Discovery Projects: Riding a quantum wave: transport and flow of atomic quantum fluids (2015–2018)

Abstract: In our lab, we use lasers and magnetic fields to cool tiny samples of millions of atoms to temperatures a few billionths of a degree above absolute zero. At such cold temperatures they form a superfluid known as a Bose-Einstein condensate, that flows with zero viscosity. Using tailored light fields to trap and guide the atoms, we will build rudimentary atomic circuits, and coax the superfluid to flow through a channel between two reservoirs, firstly with thermodynamic gradients, and secondly by building a quantum pump.

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

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

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.

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.

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.

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.

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.

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.

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.

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.

Pages

Prof Halina Rubinsztein-Dunlop
Chief Investigator, Professor
Research Fellow
Matthew Davis
Chief Investigator, Professor
Tyler Neely
Research fellow, ARC Discovery Grant Chief Investigator
Thomas A Bell
PhD Student