Higher order Soliton Complexes in Coupled Nonlinear Schrödinger Equation with Variable Coefficients

Abstract: We present the explicit dark-bright three soliton solution and the associated spectral problem for the variable coefficient integrable coupled NLS equation. Using asymptotic analysis as well as graphical analysis we study the interactions in soliton complexes. We present a correlation between the soliton parameters and the interaction pattern in three soliton complexes. Using asymptotic analysis, we present a few interesting features of complex three soliton bound state and interaction of dark-bright two soliton complex with a regular soliton. Using three soliton interactions we have shown that the energy sharing take place between soliton even when the soliton do not collide with each other. The results found by us might be useful for the development of soliton control, all optical gates as well as all optical switching devices. We hope that the analysis of three soliton complexes would be useful for a better understanding of soliton interactions in nonlinear fiber as well as in a bulk medium.