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Phase diagram of a rotating Bose-Einstein condensate with anharmonic confinement
KTH, Superseded Departments, Physics.
2004 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 69, no 5, 053619- p.Article in journal (Refereed) Published
Abstract [en]

We examine the phase diagram of an effectively repulsive Bose-Einstein condensate of atoms that rotates in a quadratic-plus-quartic potential. With use of a variational method we identify the three possible phases of the system as a function of the rotational frequency of the trap and of the coupling constant. The derived phase diagram is shown to be universal and partly exact in the limit of weak interactions and small anharmonicity. The variational results are found to be consistent with numerical solutions of the Gross-Pitaevskii equation.

Place, publisher, year, edition, pages
2004. Vol. 69, no 5, 053619- p.
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Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-44922DOI: 10.1103/PhysRevA.69.053619ISI: 000221813700134Scopus ID: 2-s2.0-3042750244OAI: oai:DiVA.org:kth-44922DiVA: diva2:454697
Note
QC 20111108Available from: 2011-11-08 Created: 2011-10-26 Last updated: 2017-12-08Bibliographically approved

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