Nonlinear transport of Bose-Einstein condensates through waveguides with disorder
- Institut fuer Theoretische Physik, Universitaet Regensburg, 93040 Regensburg (Germany)
- Laboratoire de Physique Theorique et Modeles Statistiques, Universite Paris Sud, Batiment 100, F-91405 Orsay Cedex (France)
We study the coherent flow of a guided Bose-Einstein condensate incident over a disordered region of length L. We introduce a model of disordered potential that originates from magnetic fluctuations inherent to microfabricated guides. This model allows for analytical and numerical studies of realistic transport experiments. The repulsive interaction among the condensate atoms in the beam induces different transport regimes. Below some critical interaction (or for sufficiently small L) a stationary flow is observed. In this regime, the transmission decreases exponentially with increasing L. For strong interaction (or large L), the system displays a transition toward a time-dependent flow with an algebraic decay of the time-averaged transmission.
- OSTI ID:
- 20786358
- Journal Information:
- Physical Review. A, Vol. 72, Issue 6; Other Information: DOI: 10.1103/PhysRevA.72.063621; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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