Discontinuities in the First and Second Sound Velocities at the Berezinskii-Kosterlitz-Thouless Transition (Articolo in rivista)

Type
Label
  • Discontinuities in the First and Second Sound Velocities at the Berezinskii-Kosterlitz-Thouless Transition (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevLett.112.025302 (literal)
Alternative label
  • Ozawa, Tomoki; Stringari, Sandro (2014)
    Discontinuities in the First and Second Sound Velocities at the Berezinskii-Kosterlitz-Thouless Transition
    in Physical review letters (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Ozawa, Tomoki; Stringari, Sandro (literal)
Pagina inizio
  • 025302 (literal)
Pagina fine
  • 025302 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.scopus.com/inward/record.url?eid=2-s2.0-84892502287&partnerID=q2rCbXpz (literal)
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  • 112 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 5 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 2 (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • INO-CNR BEC Center, Dipartimento di Fisica, Università di Trento, I-38123 Povo, Italy (literal)
Titolo
  • Discontinuities in the First and Second Sound Velocities at the Berezinskii-Kosterlitz-Thouless Transition (literal)
Abstract
  • We calculate the temperature dependence of the first and second sound velocities in the superfluid phase of a 2D dilute Bose gas by solving Landau's two fluid hydrodynamic equations. We predict the occurrence of a significant discontinuity in both velocities at the critical temperature, as a consequence of the jump of the superfluid density characterizing the Berezinskii-Kosterlitz-Thouless transition. The key role of the thermal expansion coefficient is discussed. We find that second sound in this dilute Bose gas can be easily excited through a density perturbation, thereby, making the perspective of the measurement of the superfluid density particularly favorable. (literal)
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