Singlet and Triplet Superfluid Competition in a Mixture of Two-Component Fermi and One-Component Dipolar Bose Gases

TL;DR

This paper explores how tunable dipolar interactions in a mixed Fermi-Bose gas system can enhance triplet superfluid pairing, potentially competing with singlet pairing, by analyzing anisotropic Fermi-Fermi interactions mediated by dipolar Bose condensates.

Contribution

It demonstrates the impact of dipolar interactions on superfluid pairing symmetry and identifies conditions for optimal triplet superfluid critical temperature in mixed quantum gases.

Findings

Dipolar interactions induce anisotropy in Fermi-Fermi scattering.

Triplet superfluid can compete with singlet superfluid under certain conditions.

Optimal critical temperature for triplet pairing can be achieved through tunable interactions.

Abstract

We consider a mixture of two-component Fermi and (one-component) dipolar Bose gases in which both dipolar interaction and s-wave scattering between fermions of opposite spins are tunable. We show that in the long wavelength limit, the anisotropy in the Fermi-Fermi interaction induced by phonons of the dipolar condensate can strongly enhance the scattering in the triplet channel. We investigate in detail the conditions for achieving optimal critical temperature at which the triplet superfluid begins to compete with the singlet superfluid.