Simultaneous Onset of Condensation of Molecules and Atoms in an Attractive Fermi Gas of Atoms

Details Simultaneous Onset of Condensation of Molecules and Atoms in an Attractive Fermi Gas of Atoms Simultaneous Onset of Condensation of Molecules and Atoms in an Attractive Fermi Gas of Atoms

2005-10-11

arxiv.org/abs/cond-mat/0510298v1

Physics

Condensed Matter

Other Condensed Matter

4 pages, 2 figures. Submitted to Phys. Rev. Lett

Scientific paper

The self-consistent equations for the order parameters of Bose-Einstein condensation (BEC) of molecules and Bardeen-Cooper-Schrieffer (BCS) condensation of atoms in a Fermi gas of atoms with an attractive two-body interaction between atoms have been derived within the Hartree-Fock-Bogoliubov approximation from the path integral representation of the grand partition function. We have found that the order parameters for BEC and BCS are proportional to each other, which implies that BEC and BCS onsets simultaneously. We have also found that the common critical temperature of BEC and BCS increases as the average number of molecules increases and that the atom-molecule coupling enhances the common critical temperature.

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