Condensate Fraction of a Two-Dimensional Attractive Fermi Gas

Details Condensate Fraction of a Two-Dimensional Attractive Fermi Gas Condensate Fraction of a Two-Dimensional Attractive Fermi Gas

2007-06-26

arxiv.org/abs/0706.3819v1

Phys. Rev. A 76, 015601 (2007)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 2 figures, accepted for publication in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.76.015601

We investigate the Bose-Einstein condensation of fermionic pairs in a two-dimensional uniform two-component Fermi superfluid obtaining an explicit formula for the condensate density as a function of the chemical potential and the energy gap. By using the mean-field extended BCS theory, we analyze, as a function of the bound-state energy, the off-diagonal long-range order in the crossover from the Bardeen-Cooper-Schrieffer (BCS) state of weakly-bound Cooper pairs to the Bose-Einstein Condensate (BEC) of strongly-bound molecular dimers.

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