Anisotropic Superfluidity in the Two-Species Polar Fermi Gas

Details Anisotropic Superfluidity in the Two-Species Polar Fermi Gas Anisotropic Superfluidity in the Two-Species Polar Fermi Gas

2010-08-03

arxiv.org/abs/1008.0514v3

PRA 82, 063624 (2010)

Physics

Condensed Matter

Quantum Gases

4 pages, 5 figures

Scientific paper

10.1103/PhysRevA.82.063624

We study the superfluid pairing in a two-species gas of heteronuclear fermionic molecules with equal density. The interplay of the isotropic s-wave interaction and anisotropic long-range dipolar interaction reveals rich physics. We find that the single-particle momentum distribution has a characteristic ellipsoidal shape that can be reasonably represented by a deformation parameter $\alpha$ defined similarly to the normal phase. Interesting momentum-dependent features of the order parameter are identified. We calculate the critical temperatures of both the singlet and triplet superfluid, suggesting a possible pairing symmetry transition by tuning the s-wave or dipolar interaction strength.

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