Signatures of coherent vortex structures in a disordered two-dimensional quantum fluid

Reeves, Matthew T., Billam, Thomas P., Anderson, Brian P. and Bradley, Ashton S. (2014) Signatures of coherent vortex structures in a disordered two-dimensional quantum fluid. Physical Review A, 89 5: . doi:10.1103/PhysRevA.89.053631

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Author Reeves, Matthew T.
Billam, Thomas P.
Anderson, Brian P.
Bradley, Ashton S.
Title Signatures of coherent vortex structures in a disordered two-dimensional quantum fluid
Journal name Physical Review A   Check publisher's open access policy
ISSN 1094-1622
Publication date 2014-05-01
Sub-type Article (original research)
DOI 10.1103/PhysRevA.89.053631
Open Access Status File (Publisher version)
Volume 89
Issue 5
Total pages 13
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Abstract The emergence of coherent rotating structures is a phenomenon characteristic of both classical and quantum two-dimensional (2D) turbulence. In this work we show theoretically that the coherent vortex structures that emerge in decaying 2D quantum turbulence can approach quasiclassical rigid-body rotation, obeying the Feynman rule of constant average areal vortex density while remaining spatially disordered. By developing a rigorous link between the velocity probability distribution and the quantum kinetic energy spectrum over wave number k, we show that the coherent vortex structures are associated with a k3 power law in the infrared region of the spectrum, and a well-defined spectral peak that is a physical manifestation of the largest structures. We discuss the possibility of realizing coherent structures in Bose-Einstein condensate experiments and present Gross-Pitaevskii simulations showing that this phenomenon, and its associated spectral signatures, can emerge dynamically from feasible initial vortex configurations.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
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Citation counts: TR Web of Science Citation Count  Cited 15 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 14 times in Scopus Article | Citations
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Created: Mon, 12 Jun 2017, 11:22:10 EST by Matt Reeves on behalf of Learning and Research Services (UQ Library)