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arXiv 0806.2647physics.plasm-ph
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量子等离子体中的自旋磁声冲击

Spin magnetosonic shocks in quantum plasmas

A. P. Misra, N. K. Ghosh

摘要:

研究了磁声波在耗散量子等离子体介质中传播的一维激波结构。采用量子磁流体动力学(QMHD)模型,考虑了由玻姆势引起的量子力项和电子的类压自旋力项。的非线性演化方程(Korteweg de-Vries-Burger),推导出描述的小振幅MSWs,其中的耗散是由等离子体电阻率提供的动力学,数值求解得到振荡和单调的冲击结构。激波强度随集体隧穿效应的增强而减小,随自旋取向效应的增强而增大。理论结果可能对天体物理学具有重要意义(例如,磁星)以及用于超冷实验室等离子体(例如,Rydberg等离子体)。

英文摘要:

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).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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