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

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

1999-06-15

arxiv.org/abs/cond-mat/9906214v1

Physics

Condensed Matter

revtex, 9 pages, 5 figures

Scientific paper

10.1103/PhysRevA.61.013602

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.

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