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.;
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. KeywordsFile in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
