Phase Transitions in Optical Lattices at Finite Temperatures

• Authors: T. Polak , T. Kopeć
• Languages of publication: EN

Abstracts

EN

We discuss the finite-temperature phase diagram in three-dimensional Bose-Hubbard model relevant for the Bose-Einstein condensates in optical lattices, by employing U(1) quantum rotor approach and the topologically constrained path integral, that includes a summation over U(1) topological charge. The effective action formalism allows us to formulate a problem in the phase only action and obtain analytical formulae for the critical lines beyond mean-field theory.

Keywords

EN

05.30.Jp   03.75.Lm   03.75.Nt   67.40.Kh  

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 115
• Issue: 1
• Pages: 418-420

Dates

published

2009-01

References

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• 6. T.P. Polak, T.K. Kopeć, Phys. Rev. B 76, 094503 (2007)
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Identifiers

DOI

10.12693/APhysPolA.115.418