Akter Shahrina, Hafez M G
Department of Mathematics, Chittagong University of Engineering and Technology, Chattogram, 4349, Bangladesh.
Department of Mathematics, Premier University, Chattogram, Bangladesh.
Sci Rep. 2022 Apr 19;12(1):6453. doi: 10.1038/s41598-022-10236-6.
This paper explores the head-on collision between two-counter propagating positron acoustic solitons and double layers (DLs) in an unmagnetized collisionless plasma having mobile cold positrons fluid, immobile positive ions and ([Formula: see text])-distributed hot positrons, and hot electrons. By employing the extended Poincaré-Lighthill-Kuo method, the coupled Korteweg-de Vries (KdV), modified KdV (mKdV) and Gardner equations are derived to archive this goal. The effect of dimensionless parameters on the propagation characteristics of interacting KdV solitons (KdVSs), mKdV solitons (mKdVSs), Gardner solitons (GSs) and DLs are examined in detail by considering the limiting cases of ([Formula: see text])-distribution. It is noted that the interaction of GSs and DLs are reported for the first time. The outcomes might be comprehended and beneficial not only in space and astrophysical environments but also in laboratory studies.
本文研究了在一种无磁化的无碰撞等离子体中，两个反向传播的正电子声孤子与双层（DLs）之间的正面碰撞。该等离子体包含可移动的冷正电子流体、固定的正离子以及呈（[公式：见原文]）分布的热正电子和热电子。通过采用扩展的庞加莱 - 莱特希尔 - 郭方法，推导了耦合的科特韦格 - 德弗里斯（KdV）、修正的KdV（mKdV）和加德纳方程以实现这一目标。通过考虑（[公式：见原文]）分布的极限情况，详细研究了无量纲参数对相互作用的KdV孤子（KdVSs）、mKdV孤子（mKdVSs）、加德纳孤子（GSs）和双层（DLs）传播特性的影响。值得注意的是，首次报道了GSs与DLs的相互作用。这些结果不仅在空间和天体物理环境中，而且在实验室研究中都可能具有理解价值和益处。
