Guilleumas, MontserratPitaevskii, L. P. (Lev Petrovich)2009-10-062009-10-0619991050-2947https://hdl.handle.net/2445/9580Interaction 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.10 p.application/pdfeng(c) The American Physical Society, 1999Matèria condensadaCondensació de Bose-EinsteinPertorbació (Dinàmica quàntica)Excitació nuclearEquacions d'onesCondensed matterBose-Einstein condensationPerturbation (Quantum dynamics)Nuclear excitationTemperature-induced resonances and Landau damping of collective modes in Bose-Einstein condensed gases in spherical trapsinfo:eu-repo/semantics/article522509info:eu-repo/semantics/openAccess