Vortex signatures in annular Bose-Einstein condensates (Articolo in rivista)

Type
Label
  • Vortex signatures in annular Bose-Einstein condensates (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Alternative label
  • Cozzini, M; Jackson, B; Stringari, S (2006)
    Vortex signatures in annular Bose-Einstein condensates
    in Physical review. A
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Cozzini, M; Jackson, B; Stringari, S (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
  • Trent Univ, Dipartimento Fis, I-38050 Povo, Italy; BEC INFM, I-38050 Povo, Italy; Univ Newcastle Upon Tyne, Sch Math & Stat, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England (literal)
Titolo
  • Vortex signatures in annular Bose-Einstein condensates (literal)
Abstract
  • We consider a Bose-Einstein condensate confined in a 'Mexican hat' or sombrero potential, with a quartic minus quadratic radial dependence. We find conditions under which the ground state is annular in shape, with a hole in the center of the condensate. Rotation leads to the appearance of stable multiply quantized vortices, giving rise to a superfluid flow around the ring. The collective modes of the system are explored both numerically and analytically using the Gross-Pitaevskii and hydrodynamic equations. Potential experimental schemes to detect vorticity are proposed and evaluated, which include measuring the splitting of collective-mode frequencies, observing expansion following release from the trap, and probing the momentum distribution of the condensate. (literal)
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