Electron-acoustic supernonlinear waves and their multistability in the framework of the nonlinear Schrödinger equation  

作　　者：Alireza Abdikian Jharna Tamang Asit Saha 

机构地区：[1]Department of Physics,Malayer University,Malayer 65719-95863,Iran [2]Department of Mathematics,Sikkim Manipal Institute of Technology,Sikkim Manipal University,Majitar,Rangpo,East-Sikkim 737136,India

出　　处：《Communications in Theoretical Physics》2020年第7期71-80,共10页理论物理通讯（英文版）

摘　　要：Finite-amplitude supernonlinear electron-acoustic waves(EAWs)are investigated under the nonlinear Schrödinger(NLS)equation in a plasma system that is composed of cold electronfluid,immobile ions and q-nonextensive hot electrons.Using the wave transfiguration,the NLS equation is deduced in a dynamical system.The presence of finite-amplitude nonlinear and supernonlinear EAWs is shown by phase plane analysis.The effects of the nonextensive parameter(q)and the speed of waves(v)on different traveling wave solutions of EAWs are presented.Furthermore,by introducing a small external periodic force in the dynamical system,multistability behaviors of EAWs under the NLS equation are shown for the first time in classical plasmas.

关 键 词：electron-acoustic wave dynamical system phase plane analysis nonextensive plasma 

分 类 号：O175.29[理学—数学] O53[理学—基础数学]