Finite-temperature phase transitions in quasi-two-dimensional spin-1 Bose gases
Quantum Gases
2010-03-25 v3
Abstract
Recently, the Berezinskii-Kosterlitz-Thouless transition was found to be mediated by half-quantum vortices (HQVs) in two-dimensional (2D) antiferromagnetic Bose gases [Phys. Rev. Lett. 97, 120406 (2006)]. We study the thermal activation of HQVs in the experimentally relevant trapped quasi-2D systems and find that the crossover temperature is shifted upwards if skyrmions are allowed. Above the defect binding temperatures we observe transitions corresponding to the onset of a coherent condensate and a quasi-condensate and discuss the absence of a fragmented condensate.
Keywords
Cite
@article{arxiv.0909.1898,
title = {Finite-temperature phase transitions in quasi-two-dimensional spin-1 Bose gases},
author = {Ville Pietilä and Tapio P. Simula and Mikko Möttönen},
journal= {arXiv preprint arXiv:0909.1898},
year = {2010}
}
Comments
4 pages, 3 figures; v2 - additional details; v3 - published version, minor changes.