Nonuniform mixed-parity superfluid state in Fermi gases

TL;DR

This paper investigates how dipole interactions influence superfluid phases in imbalanced Fermi gases, revealing a transition from the LOFF phase to a new nonuniform superfluid with a triplet component.

Contribution

It introduces a novel nonuniform superfluid phase induced by dipole interactions, replacing the traditional LOFF phase in population-imbalanced Fermi gases.

Findings

Dipole interactions induce a nonzero triplet component in the superfluid order parameter.

The LOFF phase is replaced by a new nonuniform superfluid phase.

The new phase exhibits unique spatial and pairing properties.

Abstract

We study the effects of dipole interaction on the superfluidity in a homogeneous Fermi gas with population imbalance. We show that the Larkin-Ovchinnikov-Fulde-Ferrell phase is replaced by another nonuniform superfluid phase, in which the order parameter has a nonzero triplet component induced by the dipole interaction.