Explanation of specific sine-Gordon soliton dynamics in the presence of external perturbations
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A perturbed sine-Gordon soliton is obtained by perturbation theory for nonlinear waves based on the inverse scattering method. Our result explains the non-newtonian dynamical behavior of the sine-Gordon soliton predicted by numerical experiments of Fernandez et al.
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Physics Letters, Section A: General, Atomic and Solid State Physics