L247 Johnstone_thesis_Monash_2018_Redacted.pdf (13.08 MB)

Quantum Turbulence in a Planar Bose–Einstein Condensate

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thesis
posted on 03.04.2019, 04:34 by SHAUN PHILLIP JOHNSTONE
Lars Onsager noted that turbulent fluids constrained to flow in two dimensions tend to develop large-scale features. Quantum fluids, such as atomic Bose–Einstein condensates, also feature turbulent flows, however their vortices behave as discrete point-like particles. This thesis presents the results of experiments on the distribution of quantised vortices in highly oblate, uniform Bose-Einstein condensates. Initially randomly distributed vortices were observed to rearrange themselves to become more ordered, resembling Onsager’s description of large-scale flow features. These results add to our current understanding of the physical processes involved in turbulent flows of superfluids.

History

Campus location

Australia

Principal supervisor

Kristian Peter Helmerson

Additional supervisor 1

Lincoln Turner

Additional supervisor 2

Tapio Simula

Year of Award

2018

Department, School or Centre

Physics and Astronomy

Course

Doctor of Philosophy

Degree Type

DOCTORATE

Faculty

Faculty of Science

Exports