Title
Collective excitations in a confined, interacting dilute Bose-condensed fluid Collective excitations in a confined, interacting dilute Bose-condensed fluid
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
London ,
Subject
Physics
Chemistry
Source (journal)
Physics and chemistry of liquids. - London
Volume/pages
43(2005) :2 , p. 157-165
ISSN
0031-9104
ISI
000228670100005
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
In the Thomas - Fermi (TF) regime, S. Stringari [Phys. Rev. Lett., 77, 2360 ( 1996)] established the hydrodynamic normal modes of an interacting dilute Bose-condensed fluid confined in an isotropic harmonic trap. Here, we extend this treatment beyond the TF condensate using the work of B. Hu, G. Huang and Y. Ma [ Phys. Rev. A, 69, 063608 ( 2004)] as a starting point. Both numerical results for low-lying eigenfrequencies, for various angular momentum quantum numbers l and n = 0, and also samples of corresponding eigenfunctions, are presented. Finally, eigenfrequencies are also given for some collective excitations in an axially symmetrical trap.
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