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. KeywordsI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
