Spin magnetosonic shocks in quantum plasmas

Details Spin magnetosonic shocks in quantum plasmas Spin magnetosonic shocks in quantum plasmas

2008-06-16

arxiv.org/abs/0806.2647v1

Physics Letters A Vol. 372, pp. 6412, Year 2008

Physics

Plasma Physics

8 pages, 4 figures

Scientific paper

10.1016/j.physleta.2008.08.065

The one-dimensional shock structures of magnetosonic waves (MSWs) propagating in a dissipative quantum plasma medium is studied. A quantum magnetohydrodynamic (QMHD) model is used to take into account the quantum force term due to Bohm potential and the pressure-like spin force term for electrons. The nonlinear evolution (Korteweg de-Vries-Burger) equation, derived to describe the dynamics of small amplitude MSWs, where the dissipation is provided by the plasma resistivity, is solved numerically to obtain both oscillatory and monotonic shock structures. The shock strength decreases with increasing the effects of collective tunneling and increases with increasing the effects of spin alignment. The theoretical results could be of importance for astrophysical (e.g., magnetars) as well as for ultracold laboratory plasmas (e.g., Rydberg plasmas).

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