Frequency and damping of the Scissors Mode of a Fermi gas

TL;DR

This paper calculates the frequency and damping of the scissors mode in a classical Fermi gas, comparing theoretical predictions with experimental data to identify non-classical effects near the unitarity limit.

Contribution

It provides a parameter-free theoretical analysis of the scissors mode in a Fermi gas, matching experimental observations and highlighting non-classical phenomena.

Findings

Good agreement with experimental measurements

Identification of non-classical effects near unitarity

Parameter-free theoretical predictions

Abstract

We calculate the frequency and damping of the scissors mode in a classical gas as a function of temperature and coupling strength. Our results show good agreement with the main features observed in recent measurements of the scissors mode in an ultracold gas of $^6$Li atoms. The comparison between theory and experiment involves no fitting parameters and thus allows an identification of non-classical effects at and near the unitarity limit.