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- Title
- Critical temperature of a Rashba spin-orbit-coupled Bose gas in a harmonic trap
- Author(s)
- Hu, Hui; Liu, Xia-Ji
- Abstract
- We investigate theoretically Bose-Einstein condensation of an ideal, trapped Bose gas in the presence of Rashba spin-orbit coupling. Analytic results for the critical temperature and condensate fraction are derived based on a semiclassical approximation to the single-particle-energy spectrum and density of states and are compared with exact results obtained by explicitly summing discrete energy levels for a small number of particles. We find a significant decrease of the critical temperature and of the condensate fraction due to finite spin-orbit coupling. For a large coupling strength and a finite number of particles N, the critical temperature scales as N 2/5 and N 2/3 in three and two dimensions, respectively, contrasted to the predictions of N 1/3 and N 1/2 in the absence of spin-orbit coupling. Finite-size corrections in three dimensions are also discussed.
- Publication type
- Journal article
- Research centre
- Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Atom Optics and Ultrafast Spectroscopy
- Source
- Physical Review A: Atomic, Molecular, and Optical Physics, Vol. 85, no. 1 (Jan 2012), article no. 013619
- Publication year
- 2012
- FOR Code(s)
- 01 Mathematical Sciences; 02 Physical Sciences; 03 Chemical Sciences
- Keyword(s)
- Bose gas; Harmonic trap; Rashba spin-orbit coupling; Temperature
- Publisher
- American Physical Society
- ISSN
- 1050-2947
- Publisher URL
- http://dx.doi.org/10.1103/PhysRevA.85.013619
- Copyright
- Copyright © 2012 American Physical Society. The published version is reproduced with the kind permission of the publisher.
- Research Projects
-
Ultracold atomic Fermi gases in the strongly interacting regime: a new frontier of quantum many-body physics, Australian Research Council grant number DP0984522
Imbalanced superfluidity: the quantum mystery that defies solution, Australian Research Project grant number DP0984637
- Full text
- Peer reviewed
