Soliton Dynamics in a 2D Lattice Model with Nonlinear Interactions

Details Soliton Dynamics in a 2D Lattice Model with Nonlinear Interactions Soliton Dynamics in a 2D Lattice Model with Nonlinear Interactions

2002-11-26

arxiv.org/abs/hep-th/0211251v1

J.Phys.A36:643-652,2003

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, 5 Figures, To appear in Journal of Physics A: Mathematical and General

Scientific paper

10.1088/0305-4470/36/3/304

This paper is concerned with a lattice model which is suited to square-rectangle transformations characterized by two strain components. The microscopic model involves nonlinear and competing interactions, which play a key role in the stability of soliton solutions and emerge from interactions as a function of particle pairs and noncentral type or bending forces. Special attention is devoted to the continuum approximation of the two-dimensional discrete system with the view of including the leading discreteness effects at the continuum description. The long time evolution of the localized structures is governed by an asymptotic integrable equation of the Kadomtsev-Petviashvili I type which allows the explicit construction of moving multi-solitons on the lattice. Numerical simulation performed at the discrete system investigate the stability and dynamics of multi-soliton in the lattice space.

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