Modulated Dust-Acoustic Wave Packets in an Opposite Polarity Dusty Plasma System

作     者：S.Jahan N.A.Chowdhury A.Mannan A.A.Mamun 

作者机构：Department of Physics Jahangirnagar University 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2019年第71卷第3期

页      面：327-333页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

主　　题：dust-acoustic waves opposite polarity modulational instability envelope solitons 

摘      要：The nonlinear propagation of the dust-acoustic bright and dark envelope solitons in an opposite polarity dusty plasma(OPDP) system(composed of non-extensive q-distributed electrons, iso-thermal ions, and positively as well as negatively charged warm dust) has been theoretically investigated. The reductive perturbation method(which is valid for a small, but finite amplitude limit) is employed to derive the nonlinear Schr¨odinger equation. Two types of modes, namely, fast and slow dust-acoustic(DA) modes, have been observed. The conditions for the modulational instability(MI) and its growth rate in the unstable regime of the DA waves are significantly modified by the effects of non-extensive electrons, dust mass, and temperatures of different plasma species, etc. The implications of the obtained results from our current investigation in space and laboratory OPDP medium are briefly discussed.