Finite temperature effects in light scattering off Cooper-paired Fermi atoms

TL;DR

This paper investigates how finite temperature influences light scattering in a superfluid Fermi gas, highlighting the role of light polarization and the potential to excite collective modes like Bogoliubov-Anderson phonons.

Contribution

It provides a detailed response function including vertex corrections and analyzes finite temperature effects on excitations in superfluid Fermi gases.

Findings

Finite temperature affects collective and quasiparticle excitations.

Light polarization significantly influences excitation processes.

Possibility to excite Bogoliubov-Anderson phonons via light scattering at large scattering lengths.

Abstract

We study stimulated light scattering off a superfluid Fermi gas of atoms at finite temperature. We derive response function that takes into account vertex correction due to final state interactions; and analyze finite temperature effects on collective and quasiparticle excitations of a uniform superfluid Fermi gas. Light polarization is shown to play an important role in excitations. Our results suggest that it is possible to excite Bogoliubov-Anderson phonon at a large scattering length by light scattering.