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Temperature-induced resonances and Landau damping of collective modes in Bose-Einstein condensed gases in spherical traps
Guilleumas, Montserrat; Pitaevskii, L. P. (Lev Petrovich)
Universitat de Barcelona
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.
Matèria condensada
Condensació de Bose-Einstein
Pertorbació (Dinàmica quàntica)
Excitació nuclear
Equacions d'ones
Condensed matter
Bose-Einstein condensation
Perturbation (Quantum dynamics)
Nuclear excitation
(c) The American Physical Society, 1999
The American Physical Society

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