Superfluid toroidal currents in atomic condensates

dc.contributor.authorNugent, Eileen
dc.contributor.authorMcPeake, Dermot
dc.contributor.authorMcCann, J. F.
dc.date.accessioned2017-08-29T09:04:00Z
dc.date.available2017-08-29T09:04:00Z
dc.date.issued2003
dc.description.abstractThe dynamics of toroidal condensates in the presence of condensate flow and dipole perturbation have been investigated. The Bogoliubov spectrum of a condensate is calculated for an oblate torus using a discrete-variable representation and a spectral method to high accuracy. The transition from spheroidal to toroidal geometry of the trap displaces the energy levels into narrow bands. The lowest-order acoustic modes are quantized with the dispersion relation omegasimilar to\m\omega(s) with m=0,+/-1,+/-2,.... A condensate with toroidal current kappa splits the \m\ co-rotating and counter-rotating pairs by the amount DeltaEapproximate to2\m\h (h) over bar (2)kappa<r(-2)>. Radial dipole excitations are the lowest-energy dissipation modes. For highly occupied condensates the nonlinearity creates an asymmetric mix of dipole circulation and nonlinear shifts in the spectrum of excitations so that the center of mass circulates around the axis of symmetry of the trap. We outline an experimental method to study these excitations.en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid63606
dc.identifier.citationNugent, E., McPeake, D. and McCann, J. F. (2003) 'Superfluid toroidal currents in atomic condensates', Physical Review A, 68(6), 063606 (8pp). doi: 10.1103/PhysRevA.68.063606en
dc.identifier.doi10.1103/PhysRevA.68.063606
dc.identifier.issn1050-2947
dc.identifier.issued6
dc.identifier.journaltitlePhysical Review Aen
dc.identifier.urihttps://hdl.handle.net/10468/4557
dc.identifier.volume68
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.urihttps://journals.aps.org/pra/abstract/10.1103/PhysRevA.68.063606
dc.rights© 2003, American Physical Societyen
dc.subjectBose-Einstein condensateen
dc.subjectVorticesen
dc.subjectTrapsen
dc.subjectStatesen
dc.subjectGasesen
dc.subjectRingen
dc.titleSuperfluid toroidal currents in atomic condensatesen
dc.typeArticle (peer-reviewed)en
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