Berezinskii-Kosterlitz-Thouless transition in trapped   quasi-two-dimensional Fermi gas near a Feshbach resonance
  We study the superfluid transition in a quasi-two-dimensional Fermi gas with a magnetic field tuning through a Feshbach resonance. Using an effective two-dimensional Hamiltonian with renormalized interaction between atoms and dressed molecules, we investigate the Berezinskii-Kosterlitz-Thouless transition temperature by studying the phase fluctuation effect. We also take into account the trapping potential in the radial plane, and discuss the number and superfluid density distributions. These results can be compared to experimental outcomes for gases prepared in one-dimensional optical lattices. 
Wei Zhang, G.-D. Lin, and L.-M. Duan