Nonlinear separate spin evolution in degenerate electron-positron-ion plasmas

Abstract

The non-linear evolution of spin-electron acoustic, positron-acoustic, and spin-electron-positron acoustic waves is considered. It is demonstrated that weakly nonlinear dynamics of each wave leads to the soliton formation. Altogether, we report on existence of three different solitons. The spin-electron acoustic soliton known for electron-ion plasmas is described for electron-positron-ion plasmas for the first time. The existence of the spin-electron-positron acoustic soliton is reported for the first time. The positron-acoustic soliton and the spin-electron-positron acoustic soliton arise as the areas of a positive electric potential. The spin-electron acoustic soliton behaves as the area of a negative electric potential at the relatively small positron imbalance $n_{0p}/n_{0e}=0.1$ and as the area of a positive electric potential at the relatively large positron imbalance $n_{0p}/n_{0e}=0.5$.

arXiv comment7 pages, 5 figures

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• Spin-electron-acoustic waves and solitons in high-density degenerate relativistic plasmas
• Dielectric permeability tensor and linear waves in spin-1/2 quantum kinetics with non-trivial equilibrium spin-distribution functions
• Relativistic hydrodynamic model with the average reverse gamma factor evolution for the degenerate plasmas: high-density ion-acoustic solitons
• Electrostatic Langmuir and SEAWs in spin polarized plasma double layer
• Kinetic description of the oblique propagating spin-electron acoustic waves in degenerate plasmas
• Analytical Properties of Linear Electrostatic Waves in Two-Component Quantum and Classical Plasmas