Solitary-wave solutions of the fractional nonlinear Schr\"{o}dinger equation. II. A numerical study of the dynamics

TL;DR

This paper numerically investigates the dynamics of solitary wave solutions to the fractional nonlinear Schrödinger equation, focusing on stability, interactions, and wave resolution using spectral and Runge-Kutta methods.

Contribution

It provides a detailed numerical analysis of solitary wave dynamics, including stability and interactions, for the fractional nonlinear Schrödinger equation.

Findings

Stability of solitary waves under small and large perturbations

Interactions between solitary waves analyzed

Wave resolution into trains of waves observed

Abstract

The present paper is a numerical study of the dynamics of solitary wave solutions of the fractional nonlinear Schr\"{o}dinger equation, whose existence was analyzed by the authors in the first part of the project. The computational study will be made from the approximation of the periodic initial-value problem with a fully discrete scheme consisting of a Fourier spectral method for the spatial discretization and a fourth-order, Runge-Kutta-Composition method as time integrator. Several issues regarding the stability of the waves, such as the effects of small and large perturbations, interactions of solitary waves and the resolution of initial data into trains of waves are discussed.