Finite-Temperature Renormalization Group Analysis of Interaction Effects in 2D Lattices of Bose-Einstein Condensates

Preprint

17 November 2005

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0511437

Abstract

By using a renormalization group analysis, we study the effect of interparticle interactions on the critical temperature 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 the critical temperature decreases as the interaction energy decreases; when U/J=36/\pi one has a vanishing critical temperature, signaling the possibility of a quantum phase transition of BKT type.

Keywords

RENORMALIZATION GROUP ANALYSIS
TEMPERATURE RENORMALIZATION
FINITE TEMPERATURE
PHASE TRANSITION
BOSE EINSTEIN

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Version 1, 2005-11-17, ArXiv

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