Output from Bose condensates in tunnel arrays: the role of mean-field interactions and of transverse confinement
نویسندگان
چکیده
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 87Rb atoms poured into a vertical optical lattice. From our 3D results we ascertain in a quantitative manner the role of meanfield 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. PACS: 03.75.Fi, 32.80.-t,42.50.-p ∗ Corresponding author Maria Luisa Chiofalo Scuola Normale Superiore Piazza dei Cavalieri 7, I-56126 Pisa (Italy) Tel.: +39-050-509.058 e-mail: [email protected]
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