Superfluid toroidal currents in atomic condensates

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dc.contributor.author Nugent, Eileen
dc.contributor.author McPeake, Dermot
dc.contributor.author McCann, J. F.
dc.date.accessioned 2017-08-29T09:04:00Z
dc.date.available 2017-08-29T09:04:00Z
dc.date.issued 2003
dc.identifier.citation Nugent, 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.68.063606 en
dc.identifier.volume 68
dc.identifier.issued 6
dc.identifier.issn 1050-2947
dc.identifier.uri http://hdl.handle.net/10468/4557
dc.identifier.doi 10.1103/PhysRevA.68.063606
dc.description.abstract The 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.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher American Physical Society en
dc.relation.uri https://journals.aps.org/pra/abstract/10.1103/PhysRevA.68.063606
dc.rights © 2003, American Physical Society en
dc.subject Bose-Einstein condensate en
dc.subject Vortices en
dc.subject Traps en
dc.subject States en
dc.subject Gases en
dc.subject Ring en
dc.title Superfluid toroidal currents in atomic condensates en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Dermot McPeake, Tyndall National Institute, University College Cork, Cork, Ireland. +353-21-490-3000 en
dc.internal.availability Full text available en
dc.description.version Published Version en
dc.internal.wokid WOS:000187885000083
dc.description.status Peer reviewed en
dc.identifier.journaltitle Physical Review A en
dc.identifier.articleid 63606


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