Hydrodynamic Relaxation in a Strongly Interacting Fermi Gas

Abstract

We measure the free decay of a spatially periodic density profile in a normal fluid strongly interacting Fermi gas, which is confined in a box potential. This spatial profile is initially created in thermal equilibrium by a perturbing potential. After the perturbation is abruptly extinguished, the dominant spatial Fourier component exhibits an exponentially decaying (thermally diffusive) mode and a decaying oscillatory (first sound) mode, enabling independent measurement of the thermal conductivity and the shear viscosity directly from the time-dependent evolution.

16 pages, 12 Figures

References in corpus (5)

• Universal Quantum Viscosity in a Unitary Fermi Gas
• Viscosity and scale invariance in the unitary Fermi gas
• Shear viscosity and damping for a Fermi gas in the unitarity limit
• Shear viscosity of a universal Fermi gas near the superfluid phase transition
• Scaling solutions of the two fluid hydrodynamic equations in a harmonically trapped gas at unitarity

Cited by in corpus (11)

• Thermography of the superfluid transition in a strongly interacting Fermi gas
• Second sound with ultracold atoms: A brief historical account
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• Irreversible entropy transport enhanced by fermionic superfluidity
• Universal Density Shift Coefficients for the Thermal Conductivity and Shear Viscosity of a Unitary Fermi Gas
• Thermal conductivity of a weakly interacting Bose gas in quasi-one-dimension
• On the Gravitational Wave to Matter Coupling of Superfluid Fermi Gases Near Unitarity
• Quantum transport in strongly correlated Fermi gases
• Exact perturbative expansion of the transport coefficients of a normal low-temperature Fermi gas with contact interactions
• First and second sound in a compressible 3D Bose fluid
• Extreme dynamics and relaxation of quantum gases: A hydrodynamic approach