We discuss the finite-temperature properties of Bose-Einstein condensates loaded on a 2D optical lattice. In an experimentally attainable range of parameters, the system is described by the XY model at finite temperature, which undergoes a Berezinskii-K osterlitz-Thouless (BKT) transition driven by the vortex pair unbinding. The interference pattern of the expanding condensates provides the experimental signature of the BKT transition: near the critical temperature, the k = 0 component of the momentum distribution sharply decreases. Keywords

On defect-mediated transitions in bosonic planar lattices / Trombettoni, A.; Smerzi, A.; Sodano, P.. - In: LASER PHYSICS. - ISSN 1054-660X. - 15:4(2005), pp. 669-673.

On defect-mediated transitions in bosonic planar lattices

Trombettoni, A.;Smerzi, A.;
2005-01-01

Abstract

We discuss the finite-temperature properties of Bose-Einstein condensates loaded on a 2D optical lattice. In an experimentally attainable range of parameters, the system is described by the XY model at finite temperature, which undergoes a Berezinskii-K osterlitz-Thouless (BKT) transition driven by the vortex pair unbinding. The interference pattern of the expanding condensates provides the experimental signature of the BKT transition: near the critical temperature, the k = 0 component of the momentum distribution sharply decreases. Keywords
2005
15
4
669
673
https://arxiv.org/abs/cond-mat/0506108
Trombettoni, A.; Smerzi, A.; Sodano, P.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/32292
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