Phys. Rev. A 78, 023607 (2008) [5 pages]Interband physics in an ultracold Fermi gas in an optical latticeReceived 21 April 2008; revised 19 June 2008; published 5 August 2008 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 antiferromagnetic ordering is found to be possible for repulsive interactions, while for attractive interactions, transitions between different types of paired phases are predicted. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.78.023607
DOI:
10.1103/PhysRevA.78.023607
PACS:
67.85.Lm, 03.75.Ss, 05.30.Fk, 37.10.Jk
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