Transition from supersonic to subsonic waves in superfluid Fermi gases
arXiv:1803.11494 · doi:10.1103/PhysRevA.98.063627
Abstract
We study the propagation of dispersive waves in superfluid Fermi gases in the BEC-BCS crossover. Unlike in other superfluid systems, where dispersive waves have already been studied and observed, Fermi gases can exhibit a subsonic dispersion relation for which the dispersive wave pattern appears at the tail of the wave front. We show that this property can be used to distinguish between a subsonic and a supersonic dispersion relation at unitarity.
arXiv comment6 pages, 5 figures
References in corpus (29)
- A spin-orbit coupled Bose-Einstein condensate
- Observation of a Strongly-Interacting Degenerate Fermi Gas of Atoms
- Revealing the Superfluid Lambda Transition in the Universal Thermodynamics of a Unitary Fermi Gas
- Exploring the Thermodynamics of a Universal Fermi Gas
- Dispersive shock waves and modulation theory
- The Excitation Spectrum of a Bose-Einstein Condensate
- On Dispersive and Classical Shock Waves in Bose-Einstein Condensates and Gas Dynamics
- Homogeneous Atomic Fermi Gases
- Quantum Fluctuations in the Superfluid State of the BCS-BEC Crossover
- Collective mode of homogeneous superfluid Fermi gases in the BEC-BCS crossover
- The transverse breathing mode of an elongated Bose-Einstein condensate
- Formation of Quantum Shock Waves by Merging and Splitting Bose-Einstein Condensates
- Dispersive and diffusive-dispersive shock waves for nonconvex conservation laws
- Exploring the ferromagnetic behaviour of a repulsive Fermi gas via spin dynamics
- Goldstone mode and pair-breaking excitations in atomic Fermi superfluids
- Critical Velocity and Dissipation of an ultracold Bose-Fermi Counterflow
- Extended Thomas-Fermi Density Functional for the Unitary Fermi Gas
- Critical velocity in cylindrical Bose-Einstein condensates
- Quasiparticle energy in a strongly interacting homogeneous Bose-Einstein condensate
- Density Functional Theory for non-relativistic Fermions in the Unitarity Limit
- Direct observation of the phonon energy in a Bose-Einstein condensate by tomographic imaging
- Shock waves in dispersive hydrodynamics with non-convex dispersion
- Concavity of the collective excitation branch of a Fermi gas in the BEC-BCS crossover
- Finite temperature effective field theory and two-band superfluidity in Fermi gases
- Supersonic and subsonic shock waves in the unitary Fermi gas
- Low-momentum dynamic structure factor of a strongly interacting Fermi gas at finite temperature: The Goldstone phonon and its Landau damping
- Absorption and emission of a collective excitation by a fermionic quasiparticle in a Fermi superfluid
- Effective theory for the Goldstone field in the BCS-BEC crossover at T=0
- Landau-Khalatnikov phonon damping in strongly interacting Fermi gases