Vortex-Antivortex Lattice in Ultracold Fermionic Gases
Abstract
We discuss ultracold 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 Tc, 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 TM.
- Publication:
-
Physical Review Letters
- Pub Date:
- February 2006
- DOI:
- arXiv:
- arXiv:cond-mat/0509387
- Bibcode:
- 2006PhRvL..96d0404B
- Keywords:
-
- 03.75.Ss;
- 05.30.Fk;
- 32.80.Pj;
- 34.50.-s;
- Degenerate Fermi gases;
- Fermion systems and electron gas;
- Optical cooling of atoms;
- trapping;
- Scattering of atoms and molecules;
- Condensed Matter - Other Condensed Matter
- E-Print:
- Submitted to Physical Review Letters