Spin-1/2 fermions on spin-dependent optical lattices

Details Spin-1/2 fermions on spin-dependent optical lattices Spin-1/2 fermions on spin-dependent optical lattices

2005-02-20

arxiv.org/abs/cond-mat/0502487v2

Phys. Rev. Lett 95, 226402 (2005)

Physics

Condensed Matter

Soft Condensed Matter

Added references and shortened paper

Scientific paper

10.1103/PhysRevLett.95.226402

We study the phase diagram of one dimensional spin one-half fermionic cold atoms. The two ``spin'' species can have different hopping or mass. The phase diagram at equal densities of the species is found to be very rich, Mott insulators as well as superfluids. We also briefly discuss coupling 1D systems together, and some experimental signatures of these phases. In particular, we compute the spin structure factor in the small momentum limit, which should allow the spin gap to be detected.

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