DYNAMICS OF KINK-SOLITON SOLUTIONS OF THE (2+1)-DIMENSIONAL SINE-GORDON EQUATION

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