A self-consistent theory of a cylindrically shaped Bose-Einstein condensate (BEC) periodically modulated by a laser beam is presented. We show, both analytically and numerically, that modulational instability/stability is the mechanism by which wave functions of soliton type can be generated in a cylindrically shaped BEC subject to a one-dimensional optical lattice. The theory explains why bright solitons can exist in a BEC with positive scattering length and why condensates with negative scattering length can be stable and give rise to dark solitary pulses.
Titolo: | Modulational instability in Bose-Einstein condensates in optical lattices |
Autori: | |
Data di pubblicazione: | 2002 |
Rivista: | |
Handle: | http://hdl.handle.net/11386/1063896 |
Appare nelle tipologie: | 1.1.2 Articolo su rivista con ISSN |
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