Induced p-wave Superfluidity in Imbalanced Fermi Gases in a Synthetic Gauge Field

TL;DR

This paper investigates how synthetic gauge fields and spin-orbit interactions enhance p-wave superfluidity in imbalanced Fermi gases, revealing significant increases in pairing gaps due to these effects.

Contribution

It demonstrates that Rashba-type spin-orbit coupling greatly amplifies induced p-wave superfluid gaps in imbalanced Fermi gases with synthetic gauge fields.

Findings

Spin-orbit coupling enhances p-wave superfluid gaps.

Synthetic gauge fields induce spin-triplet p-wave pairing.

Density fluctuation-mediated pairing is significantly strengthened.

Abstract

We study pairing formation and the appearance of induced spin-triplet p-wave superfluidity in dilute three-dimensional imbalanced Fermi gases in the presence of a uniform non-Abelian gauge field. This gauge field generates a synthetic Rashba-type spin-orbit interaction which has remarkable consequences in the induced p-wave pairing gaps. Without the synthetic gauge field, the p-wave pairing occurs in one of the components due to the induced (second-order) interaction via an exchange of density fluctuations in the other component. We show that this p-wave superfluid gap induced by density fluctuations is greatly enhanced due to the Rashba-type spin-orbit coupling.