Dynamics of matter-wave solitons in a ratchet potential
Date
2008-10-06
Authors
Poletti, Dario
Alexander, Tristram J
Li, Baowen
Ostrovskaya, Elena
Kivshar, Yuri
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American Physical Society
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.
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Keywords
Keywords: Atomic physics; Atoms; Bose-Einstein condensation; Dynamics; Steam condensers; Atomic interactions; Average velocities; Bichromatic optical lattices; Bright solitons; Effective hamiltonians; Einstein condensates; Function of times; Lattice depths; Lattice
Citation
Physical Review Letters 101.15 (2008): 150403/1-4
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Physical Review Letters
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Journal article
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