Controlling directed transport of matter-wave solitons using the ratchet effect

Journal Article · Sun May 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.053617· OSTI ID:21546830

Rietmann, M; Carretero-Gonzalez, R ^[1]; Chacon, R ^[2]

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1. Nonlinear Dynamical Systems Group, and Computational Science Research Center and Department of Mathematics and Statistics, San Diego State University, San Diego, California 92182-7720 (United States)
2. Departamento de Fisica Aplicada, Escuela de Ingenierias Industriales, Universidad de Extremadura, Apartado Postal 382, E-06006 Badajoz (Spain)

We demonstrate that directed transport of bright solitons formed in a quasi-one-dimensional Bose-Einstein condensate can be reliably controlled by tailoring a weak optical lattice potential, biharmonic in both space and time, in accordance with the degree of symmetry breaking mechanism. By considering the regime where matter-wave solitons are narrow compared to the lattice period, (i) we propose an analytical estimate for the dependence of the directed soliton current on the biharmonic potential parameters that is in good agreement with numerical experiments, and (ii) we show that the dependence of the directed soliton current on the number of atoms is a consequence of the ratchet universality.

• OSTI ID: 21546830
• Journal Information: Physical Review. A, Vol. 83, Issue 5; Other Information: DOI: 10.1103/PhysRevA.83.053617; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
BOSE-EINSTEIN CONDENSATION
LATTICE PARAMETERS
NEUTRAL-PARTICLE TRANSPORT
ONE-DIMENSIONAL CALCULATIONS
POTENTIALS
SOLITONS
SPACE DEPENDENCE
SYMMETRY BREAKING
TIME DEPENDENCE
WAVE PROPAGATION
QUASI PARTICLES
RADIATION TRANSPORT