Phys. Rev. A 61, 013602 (1999) [10 pages]Temperature-induced resonances and Landau damping of collective modes in Bose-Einstein condensed gases in spherical trapsReceived 14 June 1999; published 9 December 1999 Interaction between collective monopole oscillations of a trapped Bose-Einstein condensate and thermal excitations is investigated by means of perturbation theory. We assume spherical symmetry to calculate the matrix elements by solving the linearized Gross-Pitaevskii equations. We use them to study the resonances of the condensate induced by temperature when an external perturbation of the trapping frequency is applied and to calculate the Landau damping of the oscillations. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.61.013602
DOI:
10.1103/PhysRevA.61.013602
PACS:
03.75.Fi, 02.70.Lq, 67.40.Db
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