Direct Perturbation Method for Derivative Nonlinear Schrdinger Equation  

作　　者：CHENG Xue-Ping LIN Ji HAN Ping 

机构地区：[1]School of Physics, Mathematics and Information Science, Zhejiang Ocean University, Zhoushan 316000, China [2]College of Physics, Mathematics and Information Engineering, Zhejiang Normal University, Jinhua 321004, China

出　　处：《Communications in Theoretical Physics》2008年第8期501-504,共4页理论物理通讯（英文版）

基　　金：supported by National Natural Science Foundation of China under Grant No.10575087

摘　　要：We extend Lou＇s direct perturbation method for solving the nonlinear Schrodinger equation to the case of the derivative nonlinear Schrodinger equation （DNLSE）. By applying this method, different types of perturbation solutions are obtained. Based on these approximate solutions, the analytical forms of soliton parameters, such as the velocity, the width and the initial position, are carried out and the effects of perturbation on solitons are analyzed at the same time. A numerical simulation of perturbed DNLSE finally verifies the results of the perturbation method.

关 键 词：direct perturbation method perturbed derivative nonlinear SchrSdinger equation 

分 类 号：O415[理学—理论物理]