A Raman-induced Feshbach resonance in an effectively single-component Fermi gas

TL;DR

This paper demonstrates a method to induce strong interactions in single-component ultracold Fermi gases using a Raman-induced Feshbach resonance combined with spin-orbit coupling, enabling exploration of exotic quantum phenomena.

Contribution

It introduces a novel experimental approach to realize strongly-interacting single-component Fermi gases via a Raman-induced Feshbach resonance with spin-orbit coupling.

Findings

Identification of a Feshbach resonance through atomic loss features.

The resonance is preserved and shifted with spin-orbit coupling parameters.

Agreement with a single-channel scattering model.

Abstract

Ultracold gases of interacting spin-orbit coupled fermions are predicted to display exotic phenomena such as topological superfluidity and its associated Majorana fermions. Here, we experimentally demonstrate a route to strongly-interacting single-component atomic Fermi gases by combining an s-wave Feshbach resonance (giving strong interactions) and spin-orbit coupling (creating an effective p-wave channel). We identify the Feshbach resonance by its associated atomic loss feature and show that, in agreement with our single-channel scattering model, this feature is preserved and shifted as a function of the spin-orbit coupling parameters.