Non-Self-Similar Modes of Vibration of a Bose-Einstein Condensate
M Brewczyk, Charles W. Clark, M Lewenstein, K Rzazewski
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.
Journal of Physics B-Atomic Molecular and Optical Physics
, Clark, C.
, Lewenstein, M.
and Rzazewski, K.
Non-Self-Similar Modes of Vibration of a Bose-Einstein Condensate, Journal of Physics B-Atomic Molecular and Optical Physics
(Accessed September 24, 2023)