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Propagation and Soliton Collision of Positron Acoustic Waves in Four-component Space Plasmas

  • General and Applied Physics
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Abstract

In this paper, the collision dynamics of positron acoustic waves (PAWs) in an unmagnetized plasma containing immobile ions, inertial cold positron, non-thermally distributed hot electrons and positrons is investigated theoretically. The study of soliton collisions represent one of the marvellous phenomena in nonlinear wave dynamics. The dynamics of the system is governed by the well established nonlinear Schrödinger equation (NLSE). By employing Hirota bilinearization technique the collision between two solitary wave solutions is obtained. It is found that the effect of the ratio of the hot electron temperature to the hot positron temperature (\(\sigma\)) and non-thermal parameter (\(\beta\)) plays a significant role in changing the amplitude of the PAWs. From this result it is perceived that the fascinating inelastic collisions of soliton supports energy redistribution among the modes including amplitude change of the soliton. It is observed that the profile of the solitons is strongly influenced by the relevant physical parameters. Finally the result of the investigation may be useful to analyze the collective phenomena related to PAWs collisions that are of considerable interest in space and laboratory plasmas as well as in plasma applications.

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  1. Vivekanandha College of Arts and Sciences for Women (Autonomous), Elayampalayam, Tiruchengode, Namakkal-637205, India

    C. Lavanya

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Lavanya, C. Propagation and Soliton Collision of Positron Acoustic Waves in Four-component Space Plasmas. Braz J Phys 52, 38 (2022). https://doi.org/10.1007/s13538-021-01036-w

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