Superfluidity of p-wave and s-wave atomic Fermi gases in optical lattices

Details Superfluidity of p-wave and s-wave atomic Fermi gases in optical lattices Superfluidity of p-wave and s-wave atomic Fermi gases in optical lattices

2005-08-04

arxiv.org/abs/cond-mat/0508134v2

Phys. Rev. B 72, 224513 (2005)

Physics

Condensed Matter

Superconductivity

17 pages with 16 figures; To be published in PRB

Scientific paper

10.1103/PhysRevB.72.224513

We consider p-wave pairing of single hyperfine state and s-wave pairing of two hyperfine states ultracold atomic gases trapped in quasi-two-dimensional optical lattices. First, we analyse superfluid properties of p-wave and s-wave symmetries in the strictly weak coupling BCS regime where we discuss the order parameter, chemical potential, critical temperature, atomic compressibility and superfluid density as a function of filling factor for tetragonal and orthorhombic optical lattices. Second, we analyse superfluid properties of p-wave and s-wave superfluids in the evolution from BCS to BEC regime at low temperatures ($T \approx 0$), where we discuss the changes in the quasiparticle excitation spectrum, chemical potential, atomic compressibility, Cooper pair size and momentum distribution as a function of filling factor and interaction strength for tetragonal and orthorhombic optical lattices.

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