双电子布居量子等离子体中电声孤子的传播和斜碰撞
Propagation and oblique collision of electron-acoustic solitons in two-electron-populated quantum plasmas
摘要：
在量子流体力学模型的框架下，利用扩展的Poincaré-Lighthill-Kuo（PLK）微扰方法研究了非磁化双电子简并量子电子-离子等离子体中小振幅但有限振幅KdV型电声孤波激发的斜相互作用.发现临界等离子体参数可以区分孤子的类型及其相互作用相移。结果表明，依赖于临界量子衍射参数$H_{cr}$，压缩和稀疏孤波激发可能存在于该等离子体和它们的碰撞相移可以是正的或负的碰撞角$0<θ<π$的整个范围内。
英文摘要：
Oblique interaction of small- but finite-amplitude KdV-type electron-acoustic solitary excitations is examined in an unmagnetized two-electron-populated degenerate quantum electron-ion plasma in the framework of quantum hydrodynamics model using the extended Poincaré-Lighthill-Kuo (PLK) perturbation method. Critical plasma parameter is found to distinguish the types of solitons and their interaction phase-shifts. It is shown that, depending on the critical quantum diffraction parameter $H_{cr}$, both compressive and rarefactive solitary excitations may exist in this plasma and their collision phase-shifts can be either positive or negative for the whole range of the collision angle $0<θ<π$.
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