Soliton Dynamics in Linearly Coupled Discrete Nonlinear Schrödinger Equations

Details Soliton Dynamics in Linearly Coupled Discrete Nonlinear Schrödinger Equations Soliton Dynamics in Linearly Coupled Discrete Nonlinear Schrödinger Equations

2009-04-15

arxiv.org/abs/0904.2415v1

Nonlinear Sciences

Pattern Formation and Solitons

to be published in Mathematics and Computers in Simulation, proceedings of the fifth IMACS International Conference on Nonline

Scientific paper

We study soliton dynamics in a system of two linearly coupled discrete nonlinear Schr\"odinger equations, which describe the dynamics of a two-component Bose gas, coupled by an electromagnetic field, and confined in a strong optical lattice. When the nonlinear coupling strengths are equal, we use a unitary transformation to remove the linear coupling terms, and show that the existing soliton solutions oscillate from one species to the other. When the nonlinear coupling strengths are different, the soliton dynamics is numerically investigated and the findings are compared to the results of an effective two-mode model. The case of two linearly coupled Ablowitz-Ladik equations is also investigated.

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