Pairing Symmetry in the Anisotropic Fermi Superfluid under p-wave Feshbach Resonance

Details Pairing Symmetry in the Anisotropic Fermi Superfluid under p-wave Feshbach Resonance Pairing Symmetry in the Anisotropic Fermi Superfluid under p-wave Feshbach Resonance

2006-01-20

arxiv.org/abs/cond-mat/0601461v1

Physical Review B 73, 064517 (2006)

Physics

Condensed Matter

Other Condensed Matter

12 pages, 7 figures

Scientific paper

10.1103/PhysRevB.73.064517

The anisotropic Fermi superfluid of ultra-cold Fermi atoms under the p-wave Feshbach resonance is studied theoretically. The pairing symmetry of the ground state is determined by the strength of the atom-atom magnetic dipole interaction. It is $k_z$ for a strong dipole interaction; while it becomes $k_z - i \beta k_y$, up to a rotation about z, for a weak one (Here $\beta$ < 1 is a numerical coefficient). By changing the external magnetic field or the atomic gas density, a phase transition between these two states can be driven. We discuss how the pairing symmetry of the ground state can be determined in the time-of-flight experiments.

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