Magnetosonic solitons in a Fermionic quantum plasma

Abstract

Starting from the governing equations for a quantum magnetoplasma including the quantum Bohm potential and electron spin-1/2 effects, we show that the system of quantum magnetohydrodynamic (QMHD) equations admit rarefactive solitons due to the balance between nonlinearities and quantum diffraction/tunneling effects. It is found that the electron spin-1/2 effect introduces a pressure-like term with negative sign in the QMHD equations, which modifies the shape of the solitary magnetosonic waves and makes them wider and shallower. Numerical simulations of the time-dependent system shows the development of rarefactive QMHD solitary waves that are modified by the spin effects.

8 pages, 3 figures, version to appear in Physical Review E

References in corpus (9)

• Nonlinear collective effects in photon-photon and photon-plasma interactions
• Physics of Strongly Magnetized Neutron Stars
• Dynamics of spin 1/2 quantum plasmas
• Spin magnetohydrodynamics
• Modified Zakharov equations for plasmas with a quantum correction
• Statistical Effects in the Multistream Model for Quantum Plasmas
• Classical and quantum kinetics of the Zakharov system
• Nonlinear wave interactions in quantum magnetoplasmas
• Spin-Dependent Cyclotron Decay Rates in Strong Magnetic Fields

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