Output from Bose condensates in tunnel arrays: the role of mean-field interactions and of transverse confinement

Details Output from Bose condensates in tunnel arrays: the role of mean-field interactions and of transverse confinement Output from Bose condensates in tunnel arrays: the role of mean-field interactions and of transverse confinement

2000-03-22

arxiv.org/abs/cond-mat/0003363v1

Physics

Condensed Matter

Statistical Mechanics

12 pages, 2 figures

Scientific paper

10.1016/S0375-9601(00)00197-3

We present numerical studies of atomic transport in 3D and 1D models for a mode-locked, pulsed atom laser as realized by Anderson and Kasevich [Science 281 (1998) 1686] using an elongated Bose condensate of ${}^{87}$Rb atoms poured into a vertical optical lattice. From our 3D results we ascertain in a quantitative manner the role of mean-field interactions in determining the shape and the size of the pulses in the case of Gaussian transverse confinement. By comparison with 1D simulations we single out a best-performing 1D reduction of the mean-field interactions, which yields quantitatively useful predictions for all main features of the matter output.

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