Stability of the fermionic gases close to a p-wave Feshbach resonance

J. Levinsen 1, N. R. Cooper 2, V. Gurarie 3

Physical Review A: Atomic, Molecular and Optical Physics 78 (2008) 063616

We study the stability of the paired fermionic p-wave superfluid made out of identical atoms all in the same hyperfine state close to a p-wave Feshbach resonance. First we reproduce known results concerning the lifetime of a 3D superfluid, in particular, we show that it decays at the same rate as its interaction energy, thus precluding its equilibration before it decays. Then we proceed to study its stability in case when the superfluid is confined to 2D by means of an optical harmonic potential. We find that the relative stability is somewhat improved in 2D in the BCS regime, such that the decay rate is now slower than the appropriate interaction energy scale. The improvement in stability, however, is not dramatic and one probably needs to look for other mechanisms to suppress decay to create a long lived 2D p-wave fermionic superfluid.

  • 1. Laboratoire de Physique Théorique et Modèles Statistiques (LPTMS),
    CNRS : UMR8626 – Université Paris XI - Paris Sud
  • 2. TCM Group, Cavendish Laboratory,
    Cavendish Laboratory Cambridge
  • 3. Department of physics, University of Colorado,
    University of Colorado