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.
- Publication:
-
Physical Review Letters
- Pub Date:
- March 2022
- DOI:
- 10.1103/PhysRevLett.128.090402
- arXiv:
- arXiv:2112.00549
- Bibcode:
- 2022PhRvL.128i0402W
- Keywords:
-
- Condensed Matter - Quantum Gases
- E-Print:
- 16 pages, 12 Figures