TY - JOUR
T1 - Dynamics of matter-wave solitons in a ratchet potential
AU - Poletti, Dario
AU - Alexander, Tristram J.
AU - Ostrovskaya, Elena A.
AU - Li, Baowen
AU - Kivshar, Yuri S.
PY - 2008/10/6
Y1 - 2008/10/6
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=54049140591&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.101.150403
DO - 10.1103/PhysRevLett.101.150403
M3 - Article
SN - 0031-9007
VL - 101
JO - Physical Review Letters
JF - Physical Review Letters
IS - 15
M1 - 150403
ER -