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arXiv · 2112.00549

Hydrodynamic Relaxation in a Strongly Interacting Fermi Gas

Xin Wang·Xiang Li·Ilya Arakelyan·J. E. Thomas
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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.

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Xin Wang, Xiang Li, Ilya Arakelyan, J. E. Thomas. 2021-12-01. Hydrodynamic Relaxation in a Strongly Interacting Fermi Gas. https://doi.org/10.1103/physrevlett.128.090402

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