Instability and vortex ring dynamics in a three-dimensional superfluid flow through a constriction (Articolo in rivista)

Type
Label
  • Instability and vortex ring dynamics in a three-dimensional superfluid flow through a constriction (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/1367-2630/13/4/043008 (literal)
Alternative label
  • Piazza F. [ 1,2 ] ; Collins L.A. [ 3 ] ; Smerzi Augusto [ 1,2 ] (2011)
    Instability and vortex ring dynamics in a three-dimensional superfluid flow through a constriction
    in New journal of physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Piazza F. [ 1,2 ] ; Collins L.A. [ 3 ] ; Smerzi Augusto [ 1,2 ] (literal)
Pagina inizio
  • 043008 (literal)
Pagina fine
  • 043008 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 13 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 14 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • [ 1 ] INO CNR, BEC Ctr, I-38123 Povo, Trento, Italy [ 2 ] Univ Trent, Dipartimento Fis, I-38123 Povo, Italy [ 3 ] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA (literal)
Titolo
  • Instability and vortex ring dynamics in a three-dimensional superfluid flow through a constriction (literal)
Abstract
  • We study the instability of a superfluid flow through a constriction in three spatial dimensions. We consider a Bose-Einstein condensate at zero temperature in two different geometries: a straight waveguide and a torus. The constriction consists of a broad, repulsive penetrable barrier. In the hydrodynamic regime, we find that the flow becomes unstable as soon as the velocity at the classical (Thomas-Fermi) surface equals the sound speed inside the constriction. At this critical point, vortex rings enter the bulk region of the cloud. The nucleation and dynamics scenario is strongly affected by the presence of asymmetries in the velocity and density of the background condensate flow. (literal)
Prodotto di
Autore CNR
Insieme di parole chiave

Incoming links:


Autore CNR di
Prodotto
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
Insieme di parole chiave di
data.CNR.it