Population and Phase Coherence during the Growth of an Elongated Bose-Einstein Condensate
Population and Phase Coherence during the Growth of an Elongated Bose-Einstein Condensate
We study the growth of an elongated phase-fluctuating condensate from a non-equilibrium thermal cloud obtained by shock-cooling. We compare the growth of the condensate with numerical simulations, revealing a time delay and a reduction in the growth rate which we attribute to phase fluctuations. We measure the phase coherence using momentum Bragg spectroscopy, and thereby observe the evolution of the phase coherence as a function of time. Combining the phase coherence results with the numerical simulations, we suggest a simple model for the reduction of the growth rate based on the reduction of bosonic stimulation due to phase fluctuations and obtain improved agreement between theory and experiment.
Andres Var¨°n、Philippe Bouyer、Alain Aspect、Mathilde Hugbart、Jocelyn A. Retter、Matthew J. Davis
LCFIOLCFIOLCFIOLCFIOLCFIOARC QUANTUM OPTICS
物理学
Andres Var¨°n,Philippe Bouyer,Alain Aspect,Mathilde Hugbart,Jocelyn A. Retter,Matthew J. Davis.Population and Phase Coherence during the Growth of an Elongated Bose-Einstein Condensate[EB/OL].(2006-02-15)[2025-08-24].https://arxiv.org/abs/cond-mat/0602346.点此复制
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