Interband physics in an ultra-cold Fermi gas in an optical lattice

Details Interband physics in an ultra-cold Fermi gas in an optical lattice Interband physics in an ultra-cold Fermi gas in an optical lattice

2008-04-21

arxiv.org/abs/0804.3280v2

Phys. Rev. A 78, 023607 (2008)

Physics

Condensed Matter

Statistical Mechanics

5 pages, 2 figures

Scientific paper

10.1103/PhysRevA.78.023607

We study a gas of strongly polarized cold fermions in an optical lattice when the excited p-bands are populated. We derive the relevant Hamiltonian and discuss the expected phase diagram for both repulsive and attractive interactions. In the parameter regime covered here, checkerboard anti-ferromagnetic ordering is found to be possible for repulsive interactions while for attractive interactions, transitions between different types of paired phases are predicted.

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