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

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英文篇名：Modulated Dust-Acoustic Wave Packets in an Opposite Polarity Dusty Plasma System 作者：S.Jahan ; N.A.Chowdhury ; A.Mannan ; A.A.Mamun 英文作者：S.Jahan;N.A.Chowdhury;A.Mannan;A.A.Mamun;Department of Physics, Jahangirnagar University; 英文关键词：dust-acoustic waves;;opposite polarity;;modulational instability;;envelope solitons 中文刊名：CITP 英文刊名：理论物理(英文版) 机构：Department of Physics, Jahangirnagar University; 出版日期：2019-03-01 出版单位：Communications in Theoretical Physics 年：2019 期：v.71 语种：英文; 页：CITP201903010 页数：7 CN：03 ISSN：11-2592/O3 分类号：73-79

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.
        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.

引文

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