Modulational instability of spin modified quantum magnetosonic waves in Fermi-Dirac-Pauli plasmas

Journal Article · Fri Nov 15 04:00:00 EST 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4835336· OSTI ID:22218415

Wang, Yunliang ^[1]; Lü, Xiaoxia ^[1]; Eliasson, B. ^[2]

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1. Department of Physics, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083 (China)
2. Physics Department, John Anderson Building, University of Strathclyde, Glasgow G4 0NG, Scotland (United Kingdom)

A theoretical and numerical study of the modulational instability of large amplitude quantum magnetosonic waves (QMWs) in a relativistically degenerate plasma is presented. A modified nonlinear Schrödinger equation is derived by using the reductive perturbation method. The modulational instability regions of the QMWs and the corresponding growth rates are significantly affected by the relativistic degeneracy parameter, the Pauli spin magnetization effects, and the equilibrium magnetic field. The dynamics and nonlinear saturation of the modulational instability of QMWs are investigated numerically. It is found that the increase of the relativistic degeneracy parameter can increase the growth rate of the instability, and the system is saturated nonlinearly by the formation of envelope solitary waves. The current investigation may have relevance to astrophysical magnetized compact objects, such as white dwarfs and pulsar magnetospheres.

• OSTI ID: 22218415
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 11 Vol. 20; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ASTROPHYSICS
MAGNETIC FIELDS
MAGNETIZATION
MAGNETOACOUSTIC WAVES
MAGNETOHYDRODYNAMICS
NONLINEAR PROBLEMS
NUMERICAL ANALYSIS
PERTURBATION THEORY
PLASMA INSTABILITY
PLASMA WAVES
PULSARS
RELATIVISTIC PLASMA
SCHROEDINGER EQUATION
SPIN
WHITE DWARF STARS