Non-hydrodynamic transport in trapped unitary Fermi gases

Abstract

Many strongly coupled fluids are known to share similar hydrodynamic transport properties. In this work we argue that this similarity could extend beyond hydrodynamics to transient dynamics through the presence of non-hydrodynamic modes. We review non-hydrodynamic modes in kinetic theory and gauge/gravity duality and discuss their signatures in trapped Fermi gases close to unitarity. Reanalyzing previously published experimental data, we find hints of non-hydrodynamic modes in cold Fermi gases in two and three dimensions.

4 pages, 4 figures

References in corpus (8)

• Relativistic viscous hydrodynamics, conformal invariance, and holography
• Universal Quantum Viscosity in a Unitary Fermi Gas
• The Shear Viscosity to Entropy Density Ratio of Trapped Fermions in the Unitarity Limit
• Collective oscillations of a Fermi gas in the unitarity limit: Temperature effects and the role of pair correlations
• Dynamics of a strongly interacting Fermi gas: the radial quadrupole mode
• Fluid Dynamics and Viscosity in Strongly Correlated Fluids
• Nearly Perfect Fluidity in a High Temperature Superconductor
• Viscosity spectral function of a scale invariant non-relativistic fluid from holography

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