Dynamics of kink-soliton solutions for $2+1$-dimensional sine-Gordon equation

TL;DR

This paper investigates the dynamics of kink-soliton solutions in the 2+1-dimensional sine-Gordon equation using Darboux transformations to derive explicit multi-soliton solutions and analyze their interactions.

Contribution

It introduces a generalized N-fold Darboux transformation framework for explicit solution construction of the 2D sine-Gordon equation, including multi-soliton and bound state solutions.

Findings

Explicit one- and two-soliton solutions derived

Profiles of kink-kink and kink-anti-kink interactions illustrated

First-order bound state solutions presented

Abstract

In this paper we study the dynamics of explicit solutions of $2+1$-dimensional ($2$D) sine-Gordon equation. The Darboux transformation is applied to the associated linear eigenvalue problem to construct nontrivial solutions of $2$D sine-Gordon equation in terms of ratios of determinants. We obtained a generalized expression for $N$-fold transformed dynamical variable which enables us to calculate explicit expressions of nontrivial solutions. In order to explore the dynamics of kink soliton solutions explicit expressions one- and two-soliton solutions are derived for particular column solutions. Different profiles of kink-kink and, kink and anti-kink interactions are illustrated for a different parameters and arbitrary functions. First-order bound state solution is also displayed in our work.