We consider a system of two discrete nonlinear Schrödinger 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.
|Number of pages||12|
|Journal||Physics Letters, Section A: General, Atomic and Solid State Physics|
|State||Published - 13 Sep 2004|