Temperature-induced resonances and Landau damping of collective modes in Bose-Einstein condensed gases in spherical traps

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Title:	Temperature-induced resonances and Landau damping of collective modes in Bose-Einstein condensed gases in spherical traps
Author:	Guilleumas, Montserrat; Pitaevskii, L. P. (Lev Petrovich)
Other authors:	Universitat de Barcelona
Abstract:	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.
Subject(s):	-Matèria condensada -Condensació de Bose-Einstein -Pertorbació (Dinàmica quàntica) -Excitació nuclear -Equacions d'ones -Condensed matter -Bose-Einstein condensation -Perturbation (Quantum dynamics) -Nuclear excitation
Rights:	(c) The American Physical Society, 1999
Document type:	Article Article - Published version
Published by:	The American Physical Society
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