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Physics  2004 

Modulational Instabilities and Domain Walls in Coupled Discrete Nonlinear Schr?dinger Equations

DOI: 10.1016/j.physleta.2004.07.052

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Abstract:

We consider a system of two discrete nonlinear Schr\"{o}dinger equations, coupled by nonlinear and linear terms. For various physically relevant cases, we derive a modulational instability criterion for plane-wave solutions. We also find and examine domain-wall solutions in the model with the linear coupling.

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