Phase diagram of a rotating Bose-Einstein condensate with anharmonic confinement
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
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.
IdentifiersURN: urn:nbn:se:kth:diva-44922DOI: 10.1103/PhysRevA.69.053619ISI: 000221813700134ScopusID: 2-s2.0-3042750244OAI: oai:DiVA.org:kth-44922DiVA: diva2:454697
QC 201111082011-11-082011-10-262011-11-08Bibliographically approved