Stability of nonstationary states of spin-1 Bose-Einstein condensates
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
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
American Physical Society , 2011. Vol. 84, no 4, 043646- p.
IdentifiersURN: urn:nbn:se:liu:diva-72023DOI: 10.1103/PhysRevA.84.043646ISI: 000296328600017OAI: oai:DiVA.org:liu-72023DiVA: diva2:456016
Funding Agencies|Swedish Research Council||2011-11-112011-11-112014-01-13