Pairing symmetry in an anisotropic Fermi superfluid under a p -wave Feshbach resonance

Chi Ho Cheng, Sung Kit Yip

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The anisotropic Fermi superfluid of ultra-cold Fermi atoms under the p -wave Feshbach resonance is studied theoretically. The pairing symmetry of the ground state is determined by the strength of the atom-atom magnetic dipole interaction. It is kz for a strong dipole interaction; while it becomes kz -iβ ky, up to a rotation about z, for a weak one. (Here β<1 is a numerical coefficient.) By changing the external magnetic field or the atomic gas density, a phase transition between these two states can be driven. We discuss how the pairing symmetry of the ground state can be determined in the time-of-flight experiments.

Original languageEnglish
Article number064517
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number6
Publication statusPublished - 2006 Mar 2


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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