Landau-Khalatnikov phonon damping in strongly interacting Fermi gases
arXiv:1608.00402 · doi:10.1209/0295-5075/116/40002
Abstract
We derive the phonon damping rate due to the four-phonon Landau-Khalatnikov process in low temperature strongly interacting Fermi gases using quantum hydrodynamics, correcting and extending the original calculation of Landau and Khalatnikov [ZhETF, 19 (1949) 637]. Our predictions can be tested in state-of-the-art experiments with cold atomic gases in the collisionless regime.
7 pages, final version