p-Wave superfluid and phase separation in atomic Bose-Fermi mixture

Details p-Wave superfluid and phase separation in atomic Bose-Fermi mixture p-Wave superfluid and phase separation in atomic Bose-Fermi mixture

2008-01-28

arxiv.org/abs/0801.4193v1

Physics

Condensed Matter

Superconductivity

7 pages, 6 figurs

Scientific paper

10.1103/PhysRevA.77.043629

We consider a system of repulsively interacting Bose-Fermi mixtures of spin polarized uniform atomic gases at zero temperature. We examine possible realization of p-wave superfluidity of fermions due to an effective attractive interaction via density fluctuations of Bose-Einstein condensate within mean-field approximation. We find the ground state of the system by direct energy comparison of p-wave superfluid and phase-separated states, and suggest an occurrence of the p-wave superfluid for a strong boson-fermion interaction regime. We study some signatures in the p-wave superfluid phase, such as anisotropic energy gap and quasi-particle energy in the axial state, that have not been observed in spin unpolarized superfluid of atomic fermions. We also show that a Cooper pair is a tightly bound state like a diatomic molecule in the strong boson-fermion coupling regime and suggest an observable indication of the p-wave superfluid in the real experiment.

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