Hybrid Sound Modes in One-Dimensional Quantum Liquids

Journal Article · 09 July 2018 · Physical Review Letters

DOI: https://doi.org/10.1103/PhysRevLett.121.026803 · OSTI ID:1466399

Matveev, K. A. ^[1]; Andreev, A. V. ^[2]

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1. Argonne National Lab. (ANL), Argonne, IL (United States)
2. Univ. of Washington, Seattle, WA (United States)

Here, 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.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
• Grant/Contract Number: AC02-06CH11357
• OSTI ID: 1466399
• Alternate ID(s): OSTI ID: 1459700
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 2 Vol. 121; ISSN 0031-9007; ISSN PRLTAO
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English