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Title: Ratchet-induced matter-wave transport and soliton collisions in Bose-Einstein condensates
Authors: Poletti, D.
Ostrovskaya, E.A.
Alexander, T.J.
Li, B. 
Kivshar, Y.S.
Keywords: Bose-Einstein condensate
Matter-wave soliton
Optical ratchet potential
Issue Date: 15-Jul-2009
Citation: Poletti, D., Ostrovskaya, E.A., Alexander, T.J., Li, B., Kivshar, Y.S. (2009-07-15). Ratchet-induced matter-wave transport and soliton collisions in Bose-Einstein condensates. Physica D: Nonlinear Phenomena 238 (15) : 1338-1344. ScholarBank@NUS Repository.
Abstract: We study the dynamics of bright matter-wave solitons in a Bose-Einstein condensate with negative scattering length under the influence of a time-periodic ratchet potential. The potential is formed by a one-dimensional bichromatic optical lattice which flashes on and off so that the time average of its amplitude vanishes. Due to the broken space and time-reversal symmetries of the potential, the soliton is transported with a nonzero average velocity. By employing the non-dissipative mean-field model for the matter waves, we study the dependence of the transport velocity on the initial state of the soliton and show how the properties of the individual localized states affect the outcome of their collisions. A useful insight into the transport properties is provided by Hamiltonian theory for the mean field, which treats the extended matter-wave excitation as an effective classical particle. © 2008 Elsevier B.V. All rights reserved.
Source Title: Physica D: Nonlinear Phenomena
ISSN: 01672789
DOI: 10.1016/j.physd.2008.10.003
Appears in Collections:Staff Publications

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