Transition from supersonic to subsonic waves in superfluid Fermi gases

2018/03/31 by Senne Van Loon, Wout Van Alphen, J. Tempere +2 · 4 citations
Physics and Astronomy · #Advanced Frequency and Time Standards #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Crossover #Dispersion (optics) #Dispersion relation #Fermi Gamma-ray Space Telescope #Fermi gas #Mechanics #Physics #Quantum mechanics #Superfluidity #Supersonic speed #Unitarity #cond-mat.quant-gas

paper · pdf · doi:10.1103/physreva.98.063627

published in Physical Review A 98(6) (American Physical Society) · 6 pages, 5 figures

arxiv created 2018/11/30 · openalex publication_date 2018/12/26 · arxiv updated 2019/01/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

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.

Citations

• XLI. On the change of form of long waves advancing in a rectangular canal, and on a new type of long stationary waves
• Bose-Einstein Condensation of Molecules
• Quantum fluctuations in the superfluid state of the BCS-BEC crossover
• Dispersive shock waves and modulation theory
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