Scissors modes of two-component degenerate gases: Bose-Bose and Bose-Fermi mixtures

TL;DR

This paper studies the scissors modes in two-component degenerate quantum gases, analyzing how their frequencies depend on interactions and geometry, and how these modes reveal the hydrodynamic behavior of Fermi gases.

Contribution

It provides a comprehensive analysis of scissors modes in Bose-Bose and Bose-Fermi mixtures across different regimes and geometries, highlighting their diagnostic potential.

Findings

Scissors mode frequencies depend on Bose-Fermi coupling and trap geometry.

The modes can distinguish between hydrodynamic and collisionless regimes.

Scissors modes reveal hydrodynamic behavior of Fermi gases.

Abstract

We investigate the scissors modes in binary mixtures of degenerate dilute quantum gases, for both Bose-Bose and Bose-Fermi mixtures. For the latter we consider both the superfluid and normal hydrodynamic and collisionless regimes. We analyze the dependence of the frequencies of the scissors modes and their character as a function of the Bose-Fermi coupling and the trap geometry. We show that the scissors mode can reveal a clear trace of the hydrodynamic behavior of the Fermi gas.