Quantum effects on dynamics of instabilities in Bose-Einstein condensates
arXiv:cond-mat/0109463 · doi:10.1103/PhysRevA.65.033605
Abstract
Dynamics of fluctuations in unstable Bose-Einstein condensates is analyzed by the solution of approximate operator equations. In the case of a condensate with a negative scattering length the present treatment describes a delay of collapse, in agreement with recent experiments. In the case of a collision of two condensate wavepackets it is shown that quantum effects lead to a Bose enhancement of elastic-scattering losses. In both cases the noncondensate atoms are formed as entangled pairs in squeezed states.
LaTeX, 12 pages, 2 figures, uses REVTeX and psfig, final version submitted to Physical Review A, figures added
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