Abstract
In this paper, we present two types of the semirational solutions for the coupled nonlinear Schrödinger equations through employing the generalized Darboux transformation. Based on those semirational solutions, some nonlinear wave interactions on the zero-intensity background are investigated. For example, we find that (i) two degenerate solitons with the same amplitudes draw close to each other first, then interact and finally apart from each other, while in the general two-soliton interaction, two solitons with the same amplitudes will periodically attract and repel, and form a bound state, (ii) the elastic and inelastic interactions occur between one regular soliton and degenerate solitons, (iii) some novel bound states arise due to the existence of the degenerate solitons.
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