Momentum transferred to a trapped Bose-Einstein condensate by stimulated light scattering

Details Momentum transferred to a trapped Bose-Einstein condensate by stimulated light scattering Momentum transferred to a trapped Bose-Einstein condensate by stimulated light scattering

2001-04-03

arxiv.org/abs/cond-mat/0104051v1

Physics

Condensed Matter

7 pages, 3 postscript figures

Scientific paper

10.1103/PhysRevA.64.063614

The response of a trapped Bose-Einstein condensed gas to a density perturbation generated by a two-photon Bragg pulse is investigated by solving the time-dependent Gross-Pitaevskii equation. We calculate the total momentum imparted to the condensate as a function of both the time duration of the pulse and the frequency difference of the two laser beams. The role of the dynamic response function in characterizing the time evolution of the system is pointed out, with special emphasis to the phonon regime. Numerical simulations are compared with the predictions of local density approximation. The relevance of our results for the interpretation of current experiments is also discussed.

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