By using a renormalization group analysis, we study the effect of interparticle interactions on the critical temperature TBKT 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/ one has TBKT = 0, signaling 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.
SODANO, Pasquale;
2004
Abstract
By using a renormalization group analysis, we study the effect of interparticle interactions on the critical temperature TBKT 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/ one has TBKT = 0, signaling the possibility of a quantum phase transition of BKT type.File in questo prodotto:
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