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Vortex-Antivortex Lattice in Ultra-Cold Fermi Gases

S. S. Botelho·C. A. R. Sa de Melo
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Abstract

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.

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S. S. Botelho, C. A. R. Sa de Melo. 2005-09-14. Vortex-Antivortex Lattice in Ultra-Cold Fermi Gases. https://doi.org/10.1103/physrevlett.96.040404

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