Induced Interactions for Ultracold Fermi Gases in Optical Lattices

D.-H. Kim, P. Törmä, and J.-P. Martikainen
Phys. Rev. Lett. 102, 245301 – Published 16 June 2009

Abstract

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.

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  • Received 29 January 2009

DOI:https://doi.org/10.1103/PhysRevLett.102.245301

©2009 American Physical Society

Authors & Affiliations

D.-H. Kim1, P. Törmä1, and J.-P. Martikainen2

  • 1Department of Applied Physics, Helsinki University of Technology, P.O. Box 5100, 02015 HUT, Finland
  • 2NORDITA, 106 91 Stockholm, Sweden

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Issue

Vol. 102, Iss. 24 — 19 June 2009

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