By using a renormalization group analysis, we study the effect of interparticle interactions on the critical temperature T-BKT at which the Berezinskii-Kosterlitz-Thouless (BKT) transition occurs for Bose-Einstein condensates loaded at finite temperature in a 2D optical lattice. We find that TBKT decreases as the interaction energy decreases; when U/J = 36/pi one has T-BKT = 0, signalling the possibility of a quantum phase transition of BKT type.
Finite-Temperature Renormalization Group Analysis of Interaction Effects in 2D Lattices of Bose-Einstein Condensates / Smerzi, A.; Sodano, P.; Trombettoni, A.. - In: JOURNAL OF PHYSICS. B, ATOMIC MOLECULAR AND OPTICAL PHYSICS. - ISSN 0953-4075. - 37:7(2004), pp. 265-274. [10.1088/0953-4075/37/7/071]
Finite-Temperature Renormalization Group Analysis of Interaction Effects in 2D Lattices of Bose-Einstein Condensates
Smerzi, A.;Trombettoni, A.
2004-01-01
Abstract
By using a renormalization group analysis, we study the effect of interparticle interactions on the critical temperature T-BKT at which the Berezinskii-Kosterlitz-Thouless (BKT) transition occurs for Bose-Einstein condensates loaded at finite temperature in a 2D optical lattice. We find that TBKT decreases as the interaction energy decreases; when U/J = 36/pi one has T-BKT = 0, signalling the possibility of a quantum phase transition of BKT type.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
