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.

arXiv comment7 pages, final version

References in corpus (30)

• Condensation of Pairs of Fermionic Atoms Near a Feshbach Resonance
• Observation of a Strongly-Interacting Degenerate Fermi Gas of Atoms
• Vortices and Superfluidity in a Strongly Interacting Fermi Gas
• Bose-Einstein condensation of atoms in a uniform potential
• Revealing the Superfluid Lambda Transition in the Universal Thermodynamics of a Unitary 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
• Exploring the Thermodynamics of a Universal Fermi Gas
• The truncated Wigner method for Bose condensed gases: limits of validity and applications
• The Excitation Spectrum of a Bose-Einstein Condensate
• Measurement of interaction energy near a Feshbach resonance in a 6Li Fermi gas
• Observation of pseudogap behavior in a strongly interacting Fermi gas
• BCS-BEC Crossover and the Unitary Fermi Gas
• Universal behavior of pair correlations in a strongly interacting Fermi gas
• Collective mode of homogeneous superfluid Fermi gases in the BEC-BCS crossover
• Fifty-fold improvement in the number of quantum degenerate fermionic atoms
• Determination of the Superfluid Gap in Atomic Fermi Gases by Quasiparticle Spectroscopy
• Bragg spectroscopy of a strongly interacting Fermi gas
• Evolution from BCS Superconductivity to Bose Condensation: Analytic Results for the crossover in three dimensions
• The transverse breathing mode of an elongated Bose-Einstein condensate
• Beliaev damping of quasi-particles in a Bose-Einstein condensate
• Quantum kinetic theory IV: Intensity and amplitude fluctuations of a Bose- Einstein condensate at finite temperature including trap loss
• Coherence time of a Bose-Einstein condensate
• Concavity of the collective excitation branch of a Fermi gas in the BEC-BCS crossover
• Non-diffusive phase spreading of a Bose-Einstein condensate at finite temperature
• Local observation of pair-condensation in a Fermi gas at unitarity
• Shape oscillations in non-degenerate Bose gases - transition from the collisionless to the hydrodynamic regime
• Pair excitations and parameters of state of imbalanced Fermi gases at finite temperatures
• Thermal blurring of a coherent Fermi gas
• Beliaev damping of the Goldstone mode in atomic Fermi superfluids

Cited by in corpus (6)

• Three-phonon and four-phonon interaction processes in a pair-condensed Fermi gas
• Spontaneous Beliaev-Landau scattering out of equilibrium
• Absorption and emission of a collective excitation by a fermionic quasiparticle in a Fermi superfluid
• Effects of quantum fluctuations on the low-energy collective modes of two-dimensional superfluid Fermi gases from the BCS to the Bose Limit
• Transition from supersonic to subsonic waves in superfluid Fermi gases
• Damping of elementary excitations in one-dimensional dipolar Bose gases