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arXiv 2012.15363physics.plasm-ph
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强场区的等离子体物理:理论与模拟

Plasma physics in strong-field regimes: theories and simulations

Yuan Shi, Hong Qin, Nathaniel J. Fisch

摘要:

在强电磁场中,出现了独特的等离子体现象和应用,其描述需要最近发展的理论和模拟[Y。Shi博士Princeton University(2018)。在经典区域,为了量化强磁场对三波相互作用的影响,通过求解流体模型到一般几何中的二阶,导出了一个方便的公式。作为一个应用,磁共振被用来调解激光脉冲压缩,使用它可以在更宽的频率范围内产生更高强度的脉冲,如粒子模拟所证实的。在更强的领域,相对论量子效应变得重要,和标量量子电动力学(QED)的基础上开发的等离子体模型,揭示了可观察到的修正法拉第旋转和强磁化等离子体中的回旋吸收。在微扰机制之外,格点QED被扩展为等离子体物理的数值工具,利用它可以捕捉到当激光强度超过Schwinger阈值时从尾场加速到电子-正电子对产生的转变。

英文摘要:

In strong electromagnetic fields, unique plasma phenomena and applications emerge, whose description requires recently developed theories and simulations [Y. Shi, Ph.D. thesis, Princeton University (2018)]. In the classical regime, to quantify effects of strong magnetic fields on three-wave interactions, a convenient formula is derived by solving the fluid model to the second order in general geometry. As an application, magnetic resonances are exploited to mediate laser pulse compression, using which higher intensity pulses can be produced in wider frequency ranges, as confirmed by particle-in-cell simulations. In even stronger fields, relativistic-quantum effects become important, and a plasma model based on scalar quantum electrodynamics (QED) is developed, which unveils observable corrections to Faraday rotation and cyclotron absorption in strongly magnetized plasmas. Beyond the perturbative regime, lattice QED is extended as a numerical tool for plasma physics, using which the transition from wakefield acceleration to electron-positron pair production is captured when laser intensity exceeds the Schwinger threshold.

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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