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Optical solitons, qualitative analysis and chaotic behaviors to the
highly dispersive nonlinear perturbation Schrödinger equation
Abstract
In this paper, we study the highly dispersive nonlinear perturbation
Schrödinger equation, which has arbitrary form of Kudryashov’s with
sextic-power law refractive index and generalized non-local laws. For
the equation has highly dispersive nonlinear terms and higher order
derivatives, it cannot be integrated directly, so we build an integrable
factor equation for the approximated equation and apply the trial
equation method and the complete discrimination system for polynomial
method to create new soliton solutions. On the other hand, we use the
bifurcation theory to qualitatively analyze the equation and find the
model has periodic solutions, bell-shaped soliton solutions and solitary
wave solutions via phase diagrams. The topological stability of the
solutions with respect to the parameters is explored in order to better
understand the effect of parameters perturbations on the stability of
the model’s solutions. Furthermore, we analyze the modulation
instability and give the corresponding linear criterion. After
accounting for external perturbation terms, we analyze the chaotic
behaviors of the equation through the largest Lyapunov exponents and
phase diagrams.