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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Linear and nonlinear studies of two-stream instabilities in electron-positron-ion plasmas with quantum corrections
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Linear and nonlinear studies of two-stream instabilities in electron-positron-ion plasmas with quantum corrections

机译：带有电子校正的电子-正电子离子等离子体中两流不稳定性的线性和非线性研究

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摘要

In this paper two-stream instabilities in electron-positron-ion plasmas with quantum corrections are studied in both the linear and nonlinear regimes. The relative motion of ions with respect to electron-positron plasma and of positrons with respect to electron-ion plasma can give rise to such instabilities. Analytically and numerically the growth rates are calculated; the growth rates mainly depend on the quantum corrections and percentage concentration of different species. In the nonlinear studies, by employing the reductive perturbation technique, the Korteweg-de Vries (KdV) equation is derived; the KdV equation admits the solitary wave solution. The effect of streaming in the presence of quantum corrections on the amplitude and width of electrostatic soliton is studied. The conditions for hump-like and dip-like solitary structures are discussed.
机译：本文研究了在线性和非线性两种情况下具有量子校正的电子-正电子离子等离子体中的两流不稳定性。离子相对于电子-正电子等离子体的相对运动和正电子相对于电子-离子等离子体的相对运动会引起这种不稳定性。通过分析和数字计算增长率;生长速率主要取决于不同物种的量子校正和浓度百分比。在非线性研究中，通过采用归约摄动技术，推导了Korteweg-de Vries（KdV）方程。 KdV方程允许孤立波解。研究了在存在量子校正的情况下流对静电孤子的幅度和宽度的影响。讨论了驼峰状和倾角状孤立结构的条件。

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