Probing ultracold Fermi gases with light-induced gauge potentials

TL;DR

This paper explores how light-induced gauge potentials can be used to probe properties of ultracold Fermi gases, such as superfluid density and pairing strength, through theoretical analysis.

Contribution

It introduces a theoretical framework for using optically dressed states to generate gauge potentials that probe ultracold Fermi gas properties.

Findings

Gauge potentials can measure superfluid density.

Gauge potentials can determine pairing strength.

Potential experimental implementations discussed.

Abstract

We theoretically investigate the response of a two component Fermi gas to vector potentials which couple separately to the two spin components. Such vector potentials may be implemented in ultracold atomic gases using optically dressed states. Our study indicates that light-induced gauge potentials may be used to probe the properies of the interacting ultracold Fermi gas, providing. amongst other things, ways to measure the superfluid density and the strength of pairing.