Sound propagation in elongated superfluid fermionic clouds (Articolo in rivista)

Type
Label
  • Sound propagation in elongated superfluid fermionic clouds (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Alternative label
  • Capuzzi, P; Vignolo, P; Federici, F; Tosi, MP (2006)
    Sound propagation in elongated superfluid fermionic clouds
    in Physical review. A
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Capuzzi, P; Vignolo, P; Federici, F; Tosi, MP (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 73 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Scuola Normale Super Pisa, NEST, CNR, INFM, I-56126 Pisa, Italy (literal)
Titolo
  • Sound propagation in elongated superfluid fermionic clouds (literal)
Abstract
  • We use hydrodynamic equations to study sound propagation in a superfluid Fermi gas at zero temperature inside a strongly elongated cigar-shaped trap, with main attention to the transition from the BCS to the unitary regime. First, we treat the role of the radial density profile in the limit of a cylindrical geometry and then evaluate numerically the effect of the axial confinement in a configuration in which a hole is present in the gas density at the center of the trap. We find that in a strongly elongated trap the speed of sound in both the BCS and the unitary regime differs by a factor root 3/5 from that in a homogeneous three-dimensional superfluid. The predictions of the theory could be tested by measurements of sound-wave propagation in a setup such as that exploited by Andrews [Phys. Rev. Lett. 79, 553 (1997)] for an atomic Bose-Einstein condensate. (literal)
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