Condensate Fraction of a Two-Dimensional Attractive Fermi Gas

Date
Authors
Salasnich, Luca
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
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.
Comment: 4 pages, 2 figures, accepted for publication in Phys. Rev. A
Keywords
Condensed Matter - Statistical Mechanics, Condensed Matter - Superconductivity
Citation
Collections