Finite-temperature phase transitions in quasi-two-dimensional spin-1 Bose gases
Journal Article
·
· Physical Review. A
- Department of Applied Physics/COMP, Aalto University, Post Office Box 15100, FI-00076 Aalto (Finland)
- Department of Physics, Okayama University, Okayama 700-8530 (Japan)
Recently, the Berezinskii-Kosterlitz-Thouless transition was found to be mediated by half-quantum vortices (HQVs) in two-dimensional (2D) antiferromagnetic Bose gases [S. Mukerjee, C. Xu, and J. E. Moore, Phys. Rev. Lett. 97, 120406 (2006)]. We study the thermal activation of HQVs in the experimentally relevant trapped quasi-2D system and find a crossover temperature at which free HQVs proliferate at the center of the trap. Above the crossover temperature, we observe transitions corresponding to the onset of a coherent condensate and a quasicondensate and discuss the absence of a fragmented condensate.
- OSTI ID:
- 21408473
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 81; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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