Magnetosonic solitons in a Fermionic quantum plasma
Plasma Physics
2009-11-13 v2
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.
Cite
@article{arxiv.0704.2049,
title = {Magnetosonic solitons in a Fermionic quantum plasma},
author = {M. Marklund and B. Eliasson and P. K. Shukla},
journal= {arXiv preprint arXiv:0704.2049},
year = {2009}
}