Brewczyk, M.
, Clark, C.
, Lewenstein, M.
and Rzazewski, K.
(1999),
Non-Self-Similar Modes of Vibration of a Bose-Einstein Condensate, Journal of Physics B-Atomic Molecular and Optical Physics
(Accessed July 18, 2024)
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Non-Self-Similar Modes of Vibration of a Bose-Einstein Condensate
Published
Author(s)
M Brewczyk, , M Lewenstein, K Rzazewski
Abstract
A hydrodynamical version of the time-dependent Gross-Pitaevskii equation is used to describe driven vibrations of a Bose-Einstein condensate of 87Rb atoms in a magnetic trap. If the trap frequency is suddenly decreased, and later is suddenly returned to its initial value, the response of the condensate departs from the self-similar character that is obtained in the Thomas-Fermi approach. We show that the self-similar Thomas-Fermi modes are in fact unstable. Thus, the quantum pressure term in the hydrodynamic equations of motion can play a significant role in condensate excitation dynamics, even when its effect on ground-state properties is negligible.Citation
Journal of Physics B-Atomic Molecular and Optical Physics
Volume
32
Pub Type
Journals
Keywords
Bose-Einstein condensation, collective excitations, Gross-Pitaevskii equation, hydrodynamics, Thomas-Fermi approximation, trapped atoms
Citation
Issues
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Created August 31, 1999, Updated October 12, 2021