Interband physics in an ultra-cold Fermi gas in an optical lattice
arXiv:0804.3280 · doi:10.1103/PhysRevA.78.023607
Abstract
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.
5 pages, 2 figures
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