Hybrid Sound Modes in One-Dimensional Quantum Liquids

K. A. Matveev and A. V. Andreev
Phys. Rev. Lett. 121, 026803 – Published 10 July 2018

Abstract

We study sound in a single-channel one-dimensional quantum liquid. In contrast to classical fluids, instead of a single sound mode we find two modes of density oscillations. The speeds at which these two sound modes propagate are nearly equal, with the difference that scales linearly with the small temperature of the system. The two sound modes emerge as hybrids of the first and second sounds, and combine oscillations of both density and entropy of the liquid.

  • Received 28 March 2018

DOI:https://doi.org/10.1103/PhysRevLett.121.026803

© 2018 American Physical Society

Physics Subject Headings (PhySH)

  1. Physical Systems
Condensed Matter, Materials & Applied Physics

Authors & Affiliations

K. A. Matveev1 and A. V. Andreev2

  • 1Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
  • 2Department of Physics, University of Washington, Seattle, Washington 98195, USA

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Issue

Vol. 121, Iss. 2 — 13 July 2018

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