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APS » Journals » Phys. Rev. Lett. » Volume 84 » Issue 12
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Phys. Rev. Lett. 84, 2551–2555 (2000)

Bose-Einstein Condensation in Quasi-2D Trapped Gases

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D. S. Petrov1,2, M. Holzmann3,4, and G. V. Shlyapnikov1,2,4,*
1FOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands
2Russian Research Center, Kurchatov Institute, Kurchatov Square, 123182 Moscow, Russia
3CNRS-Laboratoire de Physique Statistique, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France
4Laboratoire Kastler-Brossel, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France

Received 27 September 1999; published in the issue dated 20 March 2000

We discuss Bose-Einstein condensation (BEC) in quasi-2D trapped gases and find that well below the transition temperature Tc the equilibrium state is a true condensate, whereas at intermediate temperatures T<Tc one has a quasicondensate (condensate with fluctuating phase). The mean-field interaction in a quasi-2D gas is sensitive to the frequency ω0 of the (tight) confinement in the “frozen” direction, and one can switch the sign of the interaction by changing ω0. Variation of ω0 can also reduce the rates of inelastic processes. This offers promising prospects for tunable BEC in trapped quasi-2D gases.

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.84.2551
DOI:
10.1103/PhysRevLett.84.2551
PACS:
03.75.Fi, 05.30.Jp

*LKB is a unité de recherche de l'Ecole Normale Supérieure et de l'Université Pierre et Marie Curie, associée au CNRS.

 
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