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Title: Dynamics of matter-wave solitons in a ratchet potential
Authors: Poletti, D.
Alexander, T.J.
Ostrovskaya, E.A.
Li, B. 
Kivshar, Y.S.
Issue Date: 6-Oct-2008
Citation: Poletti, D., Alexander, T.J., Ostrovskaya, E.A., Li, B., Kivshar, Y.S. (2008-10-06). Dynamics of matter-wave solitons in a ratchet potential. Physical Review Letters 101 (15) : -. ScholarBank@NUS Repository.
Abstract: We study the dynamics of bright solitons formed in a Bose-Einstein condensate with attractive atomic interactions perturbed by a weak bichromatic optical lattice potential. The lattice depth is a biperiodic function of time with a zero mean, which realizes a flashing ratchet for matter-wave solitons. We find that the average velocity of a soliton and the soliton current induced by the ratchet depend on the number of atoms in the soliton. As a consequence, soliton transport can be induced through scattering of different solitons. In the regime when matter-wave solitons are narrow compared to the lattice period the dynamics is well described by the effective Hamiltonian theory. © 2008 The American Physical Society.
Source Title: Physical Review Letters
ISSN: 00319007
DOI: 10.1103/PhysRevLett.101.150403
Appears in Collections:Staff Publications

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