Phys. Rev. Lett. 89, 270404 (2002) [4 pages]

Bose-Einstein Condensation into Nonequilibrium States Studied by Condensate Focusing

Abstract

References

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I. Shvarchuck¹, Ch. Buggle¹, D. S. Petrov^1,2, K. Dieckmann^1,*, M. Zielonkowski^1,†, M. Kemmann¹, T. G. Tiecke¹, W. von Klitzing¹, G. V. Shlyapnikov^1,2, and J. T. M. Walraven¹
¹FOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands
²Russian Research Center, Kurchatov Institute, Kurchatov Square, 123182 Moscow, Russia

Received 25 July 2002; published 20 December 2002

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.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.89.270404

DOI:

10.1103/PhysRevLett.89.270404

PACS:

03.75.Fi, 03.75.Be, 05.30.Jp

^*Presently at MIT, Cambridge, MA 02139.

^†Presently at SAPMarkets, 69190 Walldorf, Germany.

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Phys. Rev. Lett. 89, 270404 (2002) [4 pages]

Bose-Einstein Condensation into Nonequilibrium States Studied by Condensate Focusing