Superfluid pairing in a mixture of a spin-polarized Fermi gas and a dipolar condensate

TL;DR

This paper explores how a mixture of a spin-polarized Fermi gas and a dipolar Bose-Einstein condensate can lead to anisotropic superfluid pairing, with potential for higher critical temperatures due to tunable interactions.

Contribution

It introduces a mean-field theory to estimate the critical temperature for superfluidity in such mixtures, considering anisotropic Fock potentials and optimizing system parameters.

Findings

Effective anisotropic Fermi-Fermi interaction enhances superfluid prospects.

Critical temperature can be increased by tuning dipolar interactions.

Superfluid characterized by a superposition of all odd partial waves.

Abstract

We consider a mixture of a spin-polarized Fermi gas and a dipolar Bose-Einstein condensate in which s-wave scattering between fermions and the quasiparticles of the dipolar condensate can result in an effective attractive Fermi-Fermi interaction anisotropic in nature and tunable by the dipolar interaction. We show that such an interaction can significantly increase the prospect of realizing a superfluid with a gap parameter characterized with a coherent superposition of all odd partial waves. We formulate, in the spirit of the Hartree-Fock-Bogoliubov mean-field approach, a theory which allows us to estimate the critical temperature when the anisotropic Fock potential is taken into consideration and to determine the system parameters that optimize the critical temperature at which such a superfluid emerges before the system begins to phase separate.