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arXiv · 1008.0514

Anisotropic Superfluidity in the Two-Species Polar Fermi Gas

Renyuan Liao·Joachim Brand
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Abstract

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 $α$ 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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Renyuan Liao, Joachim Brand. 2010-10-20. Anisotropic Superfluidity in the Two-Species Polar Fermi Gas. https://doi.org/10.1103/physreva.82.063624

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