Phys. Rev. Lett. 102, 245301 (2009) [4 pages]Induced Interactions for Ultracold Fermi Gases in Optical LatticesReceived 29 January 2009; revised 21 May 2009; published 16 June 2009 We investigate the effect of optical lattices on the BCS superfluidity by using the Gorkov–Melik-Barkhudarov (GMB) correction for a two-component Fermi gas. We find that the suppression of the order parameter is strongly enhanced by the lattice effects. The predictions made by the GMB corrections are in qualitative and, for the cases studied, quantitative agreement with previous quantum Monte Carlo results. We discuss how the GMB correction extends the validity of the mean-field theory to a wider range of tunable optical lattice systems in different dimensions. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.245301
DOI:
10.1103/PhysRevLett.102.245301
PACS:
67.85.−d, 03.75.Ss, 05.30.Fk, 37.10.Jk
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