Soliton dynamics at an interface between uniform medium and nonlinear optical lattice

Details Soliton dynamics at an interface between uniform medium and nonlinear optical lattice Soliton dynamics at an interface between uniform medium and nonlinear optical lattice

2009-05-07

arxiv.org/abs/0905.0995v1

Physics

Condensed Matter

Quantum Gases

Scientific paper

We study trapping and propagation of a matter-wave soliton through the interface between uniform medium and a nonlinear optical lattice (NOL). Different regimes for transmission of a broad and a narrow soliton are investigated. Reflections and transmissions of solitons are predicted as function of the lattice phase. The existence of a threshold in the amplitude of the nonlinear optical lattice, separating the transmission and reflection regimes, is verified. The localized nonlinear surface state, corresponding to the soliton trapped by the interface, is found. Variational approach predictions are confirmed by numerical simulations for the original Gross-Pitaevskii equation with nonlinear periodic potentials.

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