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Excitation spectrum of a toroidal spin-1 Bose-Einstein condensate
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
2013 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 88, no 3, Article Number: 033622- p.Article in journal (Refereed) Published
Abstract [en]

We calculate analytically the Bogoliubov excitation spectrum of a toroidal spin-1 Bose-Einstein condensate that is subjected to a homogeneous magnetic field and contains vortices with arbitrary winding numbers in the m(F) = +/- 1 components of the hyperfine spin. We show that a rotonlike spectrum can be obtained, or an initially stable condensate can be made unstable by adjusting the magnitude of the magnetic field or the trapping frequencies. The structure of the instabilities can be analyzed by measuring the particle densities of the spin components. We confirm the validity of the analytical calculations by numerical simulations.

Place, publisher, year, edition, pages
2013. Vol. 88, no 3, Article Number: 033622- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:umu:diva-81829DOI: 10.1103/PhysRevA.88.033622ISI: 000324629700002OAI: oai:DiVA.org:umu-81829DiVA: diva2:659251
Available from: 2013-10-24 Created: 2013-10-22 Last updated: 2017-12-06Bibliographically approved

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