Trapped $^{173}$Yb Fermi gas across an orbital Feshbach resonance

TL;DR

This paper models a trapped $^{173}$Yb Fermi gas near an orbital Feshbach resonance, revealing how inter-band detuning and temperature influence superfluidity, with predictions for experimental signatures of two-band superfluid phases.

Contribution

It provides a theoretical analysis of superfluid properties in a two-band $^{173}$Yb Fermi gas, highlighting the effects of inter-band detuning and temperature on phase separation.

Findings

Predicted spatial separation of superfluid and normal phases.

Identified experimental signatures of two-band superfluidity.

Analyzed the interplay of pair-breaking effects and thermal broadening.

Abstract

Starting with the two-band description of an orbital Feshbach resonance, we study superfluid properties of a trapped $^{173}$Yb Fermi gas under the assumptions of a local-density approximation for the trapping potential and a mean-field approximation for the intra-band Cooper pairings. In particular, we investigate the competition and interplay between the pair-breaking effect that is caused by the inter-band detuning energy, and the pair-breaking and thermal-broadening effects that are simultaneously caused by the temperature. We predict several experimental signatures that are directly caused by this interplay including a spatial separation of superfluid and normal phases within the trap, and could play decisive roles in probing two-band superfluidity in these systems.