Thermal conductivity of an ultracold Fermi gas in the BCS-BEC crossover.

ABSTRACT: Recent experiments on sound waves in a unitary Fermi gas reveal many transport properties about strongly interacting fermions. Sound propagates through the coupling of momentum and heat transport, and attenuates strongly with the presence of a phase transition. In this work, focusing on the temperature regimes near and below the superfluid critical temperature [Formula: see text] in the BCS-BEC crossover, we present a Kubo-based microscopic calculation of thermal conductivity [Formula: see text], which has not attracted much attention compared to the shear viscosity. Our approach primarily addresses the contributions of the fermionic quasiparticles to thermal transport and our results return to the kinetic descriptions at high temperatures. [Formula: see text] drops upon crossing the pseud

SUBMITTER: Zhou H 

PROVIDER: S-EPMC7806942 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature