Transport and turbulence in quasi-uniform and versatile Bose-Einstein condensates
著者
書誌事項
Transport and turbulence in quasi-uniform and versatile Bose-Einstein condensates
（Springer theses : recognizing outstanding Ph. D. research）
Springer, c2020
- : hardback
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注記
"Doctoral thesis accepted by the University of Queensland, QLD, Australia"
Includes bibliographical references
内容説明・目次
内容説明
Advancing the experimental study of superfluids relies on increasingly sophisticated techniques. We develop and demonstrate the loading of Bose-Einstein condensates (BECs) into nearly arbitrary trapping potentials, with a resolution improved by a factor of seven when compared to reported systems. These advanced control techniques have since been adopted by several cold atoms labs around the world.
How this BEC system was used to study 2D superfluid dynamics is described. In particular, negative temperature vortex states in a two-dimensional quantum fluid were observed. These states were first predicted by Lars Onsager 70 years ago and have significance to 2D turbulence in quantum and classical fluids, long-range interacting systems, and defect dynamics in high-energy physics. These experiments have established dilute-gas BECs as the prototypical system for the experimental study of point vortices and their nonequilibrium dynamics.
We also developed a new approach to superfluid circuitry based on classical acoustic circuits, demonstrating its conceptual and quantitative superiority over previous lumped-element models. This has established foundational principles of superfluid circuitry that will impact the design of future transport experiments and new generation quantum devices, such as atomtronics circuits and superfluid sensors.
目次
Introduction.- Theoretical Background.- A versatile BEC Apparatus.- Configuring BECs with Digital Micromirror Devices.- A Tuneable Atomtronic Oscillator.
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