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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Volume Title

Publisher

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.

Description

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

Source

Physical Review Letters

Type

Journal article

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