Universal Density Shift Coefficients for the Thermal Conductivity and Shear Viscosity of a Unitary Fermi Gas

Abstract

We measure universal temperature-independent density shifts for the thermal conductivity ${\kappa }_T$ and shear viscosity $\eta$, relative to the high temperature limits, for a normal phase unitary Fermi gas confined in a box potential. We show that a time-dependent kinetic theory model enables extraction of the hydrodynamic transport times ${\tau }_{\eta }$ and ${\tau }_{\kappa }$ from the time-dependent free-decay of a spatially periodic density perturbation, yielding the static transport properties and density shifts, corrected for finite relaxation times.

15 pages 12 figures

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Cited by in corpus (4)

• Dispersion of first sound in a weakly interacting ultracold Fermi liquid
• Quantum transport in strongly correlated Fermi gases
• Exact perturbative expansion of the transport coefficients of a normal low-temperature Fermi gas with contact interactions
• Extreme dynamics and relaxation of quantum gases: A hydrodynamic approach