Emergence of order from turbulence in an isolated planar superfluid

Simula, Tapio, Davis, Matthew J. and Helmerson, Kristian (2014) Emergence of order from turbulence in an isolated planar superfluid. Physical Review Letters, 113 16: . doi:10.1103/PhysRevLett.113.165302

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Author Simula, Tapio
Davis, Matthew J.
Helmerson, Kristian
Title Emergence of order from turbulence in an isolated planar superfluid
Journal name Physical Review Letters   Check publisher's open access policy
ISSN 1079-7114
0031-9007
Publication date 2014-10-17
Year available 2014
Sub-type Article (original research)
DOI 10.1103/PhysRevLett.113.165302
Open Access Status File (Publisher version)
Volume 113
Issue 16
Total pages 5
Place of publication College Park, MD, United States
Publisher American Physical Society
Collection year 2015
Language eng
Abstract We study the relaxation dynamics of an isolated zero temperature quasi-two-dimensional superfluid Bose-Einstein condensate that is imprinted with a spatially random distribution of quantum vortices. Following a period of vortex annihilation the remaining vortices self-organize into two macroscopic coherent “Onsager vortex” clusters that are stable indefinitely—despite the absence of driving or external dissipation in the dynamics. We demonstrate that this occurs due to a novel physical mechanism—the evaporative heating of the vortices—that results in a negative-temperature phase transition in the vortex degrees of freedom. At the end of our simulations the system is trapped in a nonthermal state. Our computational results provide a pathway to observing Onsager vortex states in a superfluid Bose gas.
Keyword Planar superfluid
Quantum vortices
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article ID: 165302 (2014)

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2015 Collection
 
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