吉林大学学报(理学版) ›› 2023, Vol. 61 ›› Issue (2): 246-250.

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广义Ablowitz-Ladik方程的守恒律和Darboux变换

谢伟康1, 樊方成1, 周冉2   

  1. 1. 闽南师范大学 数学与统计学院, 福建 漳州 363000; 2. 吉林大学 数学学院, 长春 130012
  • 收稿日期:2022-04-20 出版日期:2023-03-26 发布日期:2023-03-26
  • 通讯作者: 樊方成 E-mail:fanfc@mnnu.edu.cn

Conservation Law and Darboux Transformation of Generalized Ablowitz-Ladik  Equation

XIE Weikang1, FAN Fangcheng1, ZHOU Ran2   

  1. 1. School of Mathematics and Statistics, Minnan Normal University, Zhangzhou 363000, Fujian Province, China;
    2. College of Mathematics, Jilin University, Changchun 130012, China
  • Received:2022-04-20 Online:2023-03-26 Published:2023-03-26

摘要: 基于新的2×2离散矩阵谱问题, 研究广义Ablowitz-Ladik(AL)方程的守恒律和Darboux变换. 首先, 利用Riccati方法给出广义AL方程的无穷守恒律, 并得到其显式表示; 其次, 借助Lax对和规范变换构造广义AL方程的Darboux变换; 最后, 选择恰当的种子解, 给出广义AL方程的显式精确解, 得到2-扭结孤子解, 并分析解的动力学性质.

关键词: 广义Ablowitz-Ladik方程, Lax对, 守恒律, Darboux变换, 精确解

Abstract: Based on  a new 2×2 discrete matrix spectral problem, we  studied conservation law and Darboux transformation of generalized Ablowitz-Ladik (AL) equation. Firstly, we gave infinite  conservation law of the generalized AL equation and obtained its explicit representation by using Riccati  method. Secondly, Darboux transformation (DT) of the generalized AL equation was constructed by means of the Lax pair and gauge  transformation. Finally,  by choosing the appropriate seed solution, we gave the explicit exact solutions of the generalized AL equation,  obtained 2-kink soliton, and analyzed the dynamic properties of the solution.

Key words: generalized Ablowitz-Ladik , equation, Lax pair, conservation law, Darboux transformation, exact solution

中图分类号: 

  • O175.29