The rational solutions of the mixed nonlinear Schrödinger equation
Source abstract
Abstract
The mixed nonlinear Schrödinger (MNLS) equation is a model for the propagation of the Alfvén wave in plasmas and the ultrashort light pulse in optical fibers with two nonlinear effects of self-steepening and self phase-modulation(SPM), which is also the first non-trivial flow of the integrable Wadati-Konno-Ichikawa(WKI) system. The determinant representation Tn of a n-fold Darboux transformation(DT) for the MNLS equation is presented. The smoothness of the solution q[2k] generated by T2k is proved for the two cases (non-degeneration and double-degeneration ) through the iteration and determinant representation. Starting from a periodic seed(plane wave), rational solutions with two parameters a and b of the MNLS equation are constructed by the DT and the Taylor expansion. Two parameters denote the contributions of two nonlinear effects in solutions. We show an unusual result: for a given value of a, the increasing value of b can damage gradually the localization of the rational solution, by analytical forms and figures. A novel two-peak rational solution with variable height and a non-vanishing boundary is also obtained.
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Research context
OpenAlex topics: Nonlinear Waves and Solitons · Nonlinear Photonic Systems · Advanced Fiber Laser Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Ningbo University 1 Department of Mathematics, , Ningbo, Zhejiang 315211, P. R. China
School of Mathematical Sciences 2 , USTC, Hefei, Anhui 230026, P. R. China
Funding
National Natural Science Foundation of China
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