Dynamic and energetic stabilization of persistent currents in Bose-Einstein condensates

Handle URI:
http://hdl.handle.net/10754/552796
Title:
Dynamic and energetic stabilization of persistent currents in Bose-Einstein condensates
Authors:
Law, Kody; Neely, T. W.; Kevrekidis, P. G.; Anderson, B. P.; Bradley, A. S.; Carretero-González, R.
Abstract:
We study conditions under which vortices in a highly oblate harmonically trapped Bose-Einstein condensate (BEC) can be stabilized due to pinning by a blue-detuned Gaussian laser beam, with particular emphasis on the potentially destabilizing effects of laser beam positioning within the BEC. Our approach involves theoretical and numerical exploration of dynamically and energetically stable pinning of vortices with winding number up to S=6, in correspondence with experimental observations. Stable pinning is quantified theoretically via Bogoliubov-de Gennes excitation spectrum computations and confirmed via direct numerical simulations for a range of conditions similar to those of experimental observations. The theoretical and numerical results indicate that the pinned winding number, or equivalently the winding number of the superfluid current about the laser beam, decays as a laser beam of fixed intensity moves away from the BEC center. Our theoretical analysis helps explain previous experimental observations and helps define limits of stable vortex pinning for future experiments involving vortex manipulation by laser beams.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Citation:
Dynamic and energetic stabilization of persistent currents in Bose-Einstein condensates 2014, 89 (5) Physical Review A
Publisher:
American Physical Society (APS)
Journal:
Physical Review A
Issue Date:
9-May-2014
DOI:
10.1103/PhysRevA.89.053606
Type:
Article
ISSN:
1050-2947; 1094-1622
Additional Links:
http://link.aps.org/doi/10.1103/PhysRevA.89.053606
Appears in Collections:
Articles; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorLaw, Kodyen
dc.contributor.authorNeely, T. W.en
dc.contributor.authorKevrekidis, P. G.en
dc.contributor.authorAnderson, B. P.en
dc.contributor.authorBradley, A. S.en
dc.contributor.authorCarretero-González, R.en
dc.date.accessioned2015-05-14T08:29:16Zen
dc.date.available2015-05-14T08:29:16Zen
dc.date.issued2014-05-09en
dc.identifier.citationDynamic and energetic stabilization of persistent currents in Bose-Einstein condensates 2014, 89 (5) Physical Review Aen
dc.identifier.issn1050-2947en
dc.identifier.issn1094-1622en
dc.identifier.doi10.1103/PhysRevA.89.053606en
dc.identifier.urihttp://hdl.handle.net/10754/552796en
dc.description.abstractWe study conditions under which vortices in a highly oblate harmonically trapped Bose-Einstein condensate (BEC) can be stabilized due to pinning by a blue-detuned Gaussian laser beam, with particular emphasis on the potentially destabilizing effects of laser beam positioning within the BEC. Our approach involves theoretical and numerical exploration of dynamically and energetically stable pinning of vortices with winding number up to S=6, in correspondence with experimental observations. Stable pinning is quantified theoretically via Bogoliubov-de Gennes excitation spectrum computations and confirmed via direct numerical simulations for a range of conditions similar to those of experimental observations. The theoretical and numerical results indicate that the pinned winding number, or equivalently the winding number of the superfluid current about the laser beam, decays as a laser beam of fixed intensity moves away from the BEC center. Our theoretical analysis helps explain previous experimental observations and helps define limits of stable vortex pinning for future experiments involving vortex manipulation by laser beams.en
dc.publisherAmerican Physical Society (APS)en
dc.relation.urlhttp://link.aps.org/doi/10.1103/PhysRevA.89.053606en
dc.rightsArchived with thanks to Physical Review Aen
dc.titleDynamic and energetic stabilization of persistent currents in Bose-Einstein condensatesen
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.identifier.journalPhysical Review Aen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionCollege of Optical Sciences, University of Arizona, Tucson, Arizona 85721, USAen
dc.contributor.institutionDepartment of Mathematics and Statistics, University of Massachusetts, Amherst, Massachusetts 01003-4515, USAen
dc.contributor.institutionCollege of Optical Sciences and Department of Physics, University of Arizona, Tucson, Arizona 85721, USAen
dc.contributor.institutionJack Dodd Centre for Quantum Technology, Department of Physics, University of Otago, P.O. Box 56, Dunedin, New Zealanden
dc.contributor.institutionNonlinear Dynamical Systems Group†, Department of Mathematics and Statistics, and Computational Science Research Center, San Diego State University, San Diego, California 92182-7720, USAen
kaust.authorLaw, Kodyen
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