Publication Date
2008
Journal or Book Title
PHYSICAL REVIEW E
Abstract
We revisit the problem of the three-soliton collisions in the weakly perturbed sine-Gordon equation and develop an effective three-particle model allowing us to explain many interesting features observed in numerical simulations of the soliton collisions. In particular, we explain why collisions between two kinks and one antikink are observed to be practically elastic or strongly inelastic depending on relative initial positions of the kinks. The fact that the three-soliton collisions become more elastic with an increase in the collision velocity also becomes clear in the framework of the three-particle model. The three-particle model does not involve internal modes of the kinks, but it gives a qualitative description to all the effects observed in the three-soliton collisions, including the fractal scattering and the existence of short-lived three-soliton bound states. The radiationless energy exchange between the colliding solitons in weakly perturbed integrable systems takes place in the vicinity of the separatrix multi-soliton solutions of the corresponding integrable equations, where even small perturbations can result in a considerable change in the collision outcome. This conclusion is illustrated through the use of the reduced three-particle model.
Pages
-
Volume
78
Issue
4
Recommended Citation
Dmitriev, SV; Kevrekidis, PG; and Kivshar, YS, "Radiationless energy exchange in three-soliton collisions" (2008). PHYSICAL REVIEW E. 71.
Retrieved from https://scholarworks.umass.edu/math_faculty_pubs/71
Comments
This is the pre-published version harvested from arXiv. The published version is located at http://pre.aps.org/abstract/PRE/v78/i4/e046604