%0 Journal Article
%T Vortex-Antivortex Lattice in Ultra-Cold Fermi Gases
%A S. S. Botelho
%A C. A. R. Sa de Melo
%J Physics
%D 2005
%I arXiv
%R 10.1103/PhysRevLett.96.040404
%X We discuss ultra-cold Fermi gases in two dimensions, which could be realized in a strongly confining one-dimensional optical lattice. We obtain the temperature versus effective interaction phase diagram for an s-wave superfluid and show that, below a certain critical temperature T_c, spontaneous vortex-antivortex pairs appear for all coupling strengths. In addition, we show that the evolution from weak to strong coupling is smooth, and that the system forms a square vortex-antivortex lattice at a lower critical temperature T_M.
%U http://arxiv.org/abs/cond-mat/0509387v1