Effects of atomic interactions on Quantum Accelerator Modes

Details Effects of atomic interactions on Quantum Accelerator Modes Effects of atomic interactions on Quantum Accelerator Modes

2007-04-11

arxiv.org/abs/0704.1382v1

Phys. Rev. A 76, 031603(R) (2007)

Nonlinear Sciences

Chaotic Dynamics

4 pages, 6 figures

Scientific paper

10.1103/PhysRevA.76.031603

We consider the influence of the inclusion of interatomic interactions on the delta-kicked accelerator model. Our analysis concerns in particular quantum accelerator modes, namely quantum ballistic transport near quantal resonances. The atomic interaction is modelled by a Gross-Pitaevskii cubic nonlinearity, and we address both attractive (focusing) and repulsive (defocusing) cases. The most remarkable effect is enhancement or damping of the accelerator modes, depending on the sign of the nonlinear parameter. We provide arguments showing that the effect persists beyond mean-field description, and lies within the experimentally accessible parameter range.

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