Spin solitons in magnetized pair plasmas

Details Spin solitons in magnetized pair plasmas Spin solitons in magnetized pair plasmas

2007-07-31

arxiv.org/abs/0708.0020v2

Phys.Plasmas.14:112107,2007

Physics

Plasma Physics

7 pages

Scientific paper

10.1063/1.2793744

A set of fluid equations, taking into account the spin properties of the electrons and positrons in a magnetoplasma, are derived. The magnetohydrodynamic limit of the pair plasma is investigated. It is shown that the microscopic spin properties of the electrons and positrons can lead to interesting macroscopic and collective effects in strongly magnetized plasmas. In particular, it is found that new Alfvenic solitary structures, governed by a modified Korteweg-de Vries equation, are allowed in such plasmas. These solitary structures vanish if the quantum spin effects are neglected. Our results should be of relevance for astrophysical plasmas, e.g. in pulsar magnetospheres.

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