Landau-Khalatnikov phonon damping in strongly interacting Fermi gases

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

References in corpus (7)

• Vortices and Superfluidity in a Strongly Interacting Fermi Gas
• Crossover from a molecular Bose-Einstein condensate to a degenerate Fermi gas
• Collective excitations of a degenerate gas at the BEC-BCS crossover
• Observation of pseudogap behavior in a strongly interacting Fermi gas
• Determination of the Superfluid Gap in Atomic Fermi Gases by Quasiparticle Spectroscopy
• Bragg spectroscopy of a strongly interacting Fermi gas
• Non-diffusive phase spreading of a Bose-Einstein condensate at finite temperature

Cited by in corpus (1)

• Effects of quantum fluctuations on the low-energy collective modes of two-dimensional superfluid Fermi gases from the BCS to the Bose Limit