Bose-Einstein condensation into nonequilibrium States studied by condensate focusing.
نویسندگان
چکیده
We report the formation of Bose-Einstein condensates into nonequilibrium states. Our condensates are much longer than equilibrium condensates with the same number of atoms, show strong phase fluctuations, and have a dynamical evolution similar to that of quadrupole shape oscillations of regular condensates. The condensates emerge in elongated traps as the result of local thermalization when the nucleation time is short compared to the axial oscillation time. We introduce condensate focusing as a new method to extract the phase-coherence length of Bose-Einstein condensates.
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عنوان ژورنال:
- Physical review letters
دوره 89 27 شماره
صفحات -
تاریخ انتشار 2002