Finite-temperature dynamics of a single vortex in a Bose-Einstein condensate: Equilibrium precession and rotational symmetry breaking

Wright, T.M., Bradley, A.S. and Ballagh, R.J. (2009) Finite-temperature dynamics of a single vortex in a Bose-Einstein condensate: Equilibrium precession and rotational symmetry breaking. Physical Review a, 80 5: 053624-1-053624-20. doi:10.1103/PhysRevA.80.053624

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Author Wright, T.M.
Bradley, A.S.
Ballagh, R.J.
Title Finite-temperature dynamics of a single vortex in a Bose-Einstein condensate: Equilibrium precession and rotational symmetry breaking
Journal name Physical Review a   Check publisher's open access policy
ISSN 1050-2947
1094-1622
Publication date 2009-11
Sub-type Article (original research)
DOI 10.1103/PhysRevA.80.053624
Open Access Status File (Publisher version)
Volume 80
Issue 5
Start page 053624-1
End page 053624-20
Total pages 20
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Formatted abstract
We consider a finite-temperature Bose-Einstein condensate in a quasi-two-dimensional trap containing a single precessing vortex. We find that such a configuration arises naturally as an ergodic equilibrium of the projected Gross-Pitaevskii equation, when constrained to a finite conserved angular momentum. In an isotropic trapping potential, the condensation of the classical field into an off-axis vortex state breaks the rotational symmetry of the system. We present a methodology to identify the condensate and the Goldstone mode associated with the broken rotational symmetry in the classical-field model. We also examine the variation in vortex trajectories and thermodynamic parameters of the field as the energy of the microcanonical field simulation is varied.


Keyword Bose-Einstein condensation
Thermodynamic properties
Vortices
Gross-Pitaevskii Equation
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Article # 053624

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
ERA 2012 Admin Only
 
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