Second sound in systems of one-dimensional fermions
arXiv:1708.05733 · doi:10.1103/PhysRevLett.119.266801
Abstract
We study sound in Galilean invariant systems of one-dimensional fermions. At low temperatures, we find a broad range of frequencies in which in addition to the waves of density there is a second sound corresponding to ballistic propagation of heat in the system. The damping of the second sound mode is weak, provided the frequency is large compared to a relaxation rate that is exponentially small at low temperatures. At lower frequencies the second sound mode is damped, and the propagation of heat is diffusive.
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Cited by in corpus (6)
- Superfluidity in the 1D Bose-Hubbard Model
- Thermal conductivity of the degenerate one-dimensional Fermi gas
- Two-fluid dynamics of one-dimensional quantum liquids in the absence of Galilean invariance
- Equilibration of Quasi-One-Dimensional Fermi Gases
- Viscous Properties of a Degenerate One-Dimensional Fermi Gas
- Viscous dissipation in a gas of one-dimensional fermions with generic dispersion