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Dynamics of matter-wave solitons in a ratchet potential | | Dario Poletti
; Tristram J. Alexander
; Elena A. Ostrovskaya
; Baowen Li
; Yuri S. Kivshar
; | | Date: |
1 Feb 2008 | | 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 realises a flashing ratchet for matter-wave solitons. The
average velocity of a soliton and the directed soliton current induced by the
ratchet depend on the number of atoms in the soliton. We employ this feature to
study collisions between ratchet-driven solitons and find that soliton
transport can be induced through their interactions. In the regime when
matter-wave solitons are narrow compared to the lattice period the ratchet
dynamics is well described by the effective Hamiltonian theory. | | Source: | arXiv, 0802.0085 | | Services: | Forum | Review | PDF | Favorites | |
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