Bose-Einstein condensation into non-equilibrium states studied by condensate focusing

Details Bose-Einstein condensation into non-equilibrium states studied by condensate focusing Bose-Einstein condensation into non-equilibrium states studied by condensate focusing

2002-07-25

arxiv.org/abs/cond-mat/0207599v1

Phys. Rev. Lett. 89, 270404 (2002)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.89.270404

We report the formation of Bose-Einstein condensates into non-equilibrium 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 powerful method to extract the phase-coherence length of Bose-Einstein condensates.

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