BCS superfluidity in ultracold gases with unequal atomic populations

Details BCS superfluidity in ultracold gases with unequal atomic populations BCS superfluidity in ultracold gases with unequal atomic populations

2000-07-11

arxiv.org/abs/cond-mat/0007191v1

Europhys.Lett. 55, 150 (2001)

Physics

Condensed Matter

Soft Condensed Matter

5 pages, revtex, 2 figures

Scientific paper

10.1209/epl/i2001-00394-5

We consider the existence of a BCS superfluid phase in $^{6}$Li due to the pairing of two hyperfine states with unequal number of atoms. We show that the domain of existence for this phase will be increased to a very large extent in the vicinity of the threshold for collapse. This is due to the presence of a new phase with anisotropic order parameter. This phase is induced by the anisotropic part of the scattering, linked to the indirect interaction between atoms through density fluctuation exchange.

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