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Stability of nonstationary states of spin-1 Bose-Einstein condensates
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
2011 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 84, no 4, 043646- p.Article in journal (Refereed) Published
Abstract [en]

The stability of nonstationary states of homogeneous spin-1 Bose-Einstein condensates is studied by performing Bogoliubov analysis in a frame of reference where the state is stationary. In particular, the effect of an external magnetic field is examined. It is found that a nonzero magnetic field introduces instability in a (23)Na condensate. The wavelengths of this instability can be controlled by tuning the strength of the magnetic field. In a (87)Rb condensate this instability is present already at zero magnetic field. Furthermore, an analytical bound for the size of a stable condensate is found, and a condition for the validity of the single-mode approximation is presented. Realization of the system in a toroidal trap is discussed, and the full time development is simulated.

Place, publisher, year, edition, pages
New York: Publ. by the American Physical Society through the American Institute of Physics , 2011. Vol. 84, no 4, 043646- p.
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:umu:diva-49551DOI: 10.1103/PhysRevA.84.043646ISI: 000296328600017OAI: oai:DiVA.org:umu-49551DiVA: diva2:458274
Available from: 2011-11-22 Created: 2011-11-14 Last updated: 2017-12-08Bibliographically approved

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Makela, HarriLundh, Emil
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