Radio-frequency spectroscopy of weakly bound molecules in spin-orbit coupled atomic Fermi gases

TL;DR

This paper theoretically analyzes radio-frequency spectroscopy of weakly bound molecules in spin-orbit-coupled ultracold Fermi gases, predicting signals that reveal the molecules' unique anisotropic properties.

Contribution

It provides the first theoretical predictions of RF signals for molecules in spin-orbit-coupled Fermi gases with different coupling types, connecting to recent experimental realizations.

Findings

Predicted RF signals for anisotropic molecules

Identified differences between Rashba and Dresselhaus coupling effects

Connected theoretical predictions with recent experimental setups

Abstract

We investigate theoretically radio-frequency spectroscopy of weakly bound molecules in an ultracold spin-orbit-coupled atomic Fermi gas. We consider two cases with either equal Rashba and Dresselhaus coupling or pure Rashba coupling. The former system has been realized very recently at Shanxi University [Wang et al., arXiv:1204.1887] and MIT [Cheuk et al., arXiv:1205.3483]. We predict realistic radio-frequency signals for revealing the unique properties of anisotropic molecules formed by spin-orbit coupling.