1307.2151 (Yuki Endo et al.)

Superfluid theory of a gas of polarized dipolar Fermi molecules    [PDF]

Yuki Endo, Daisuke Inotani, Yoji Ohashi

We present a superfluid theory of a polarized dipolar Fermi gas. For two dipolar molecules each of which consists of two atoms with positive charge and negative charge, we derive an effective dipole-dipole pairing interaction. Using this pairing interaction, we show that the resulting BCS gap equation is not suffered from the well-known ultraviolet divergence, so that one can quantitatively predict superfluid properties of a dipolar Fermi gas. Using this cutoff-free superfluid theory, we examine the symmetry of the superfluid order parameter at T=0. We also discuss the deformation of the Fermi surface, originating from the anisotropy of the dipole-dipole interaction.

View original: http://arxiv.org/abs/1307.2151