arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv physics/0411058physics.plasm-ph
收藏

非线性光子的波动力学描述

Wave-kinetic description of nonlinear photons

M. Marklund, P. K. Shukla, G. Brodin, L. Stenflo

摘要:

利用波动力学描述方法研究了光子之间由于量子电动力学(QED)效应引起的非线性相互作用。从相干波描述出发,利用Wigner变换技术,得到了一组波动力学方程,即Wigner-Moyal方程。这些方程耦合到背景辐射流体,其动力学由声波方程确定。在缓慢变化的声学限制,我们分析所得到的动力学方程组的系统,并表明,他们描述的不稳定性,以及朗道阻尼。这种不稳定性可能导致超高强度多束系统的分裂和聚焦,这与阻尼一起可能导致稳定的强场结构。这些结果可能与下一代激光等离子体系统有关。

英文摘要:

The nonlinear interaction, due to quantum electrodynamical (QED) effects, between photons is investigated using a wave-kinetic description. Starting from a coherent wave description, we use the Wigner transform technique to obtain a set of wave-kinetic equations, the so called Wigner-Moyal equations. These equations are coupled to a background radiation fluid, whose dynamics is determined by an acoustic wave equation. In the slowly varying acoustic limit, we analyse the resulting system of kinetic equations, and show that they describe instabilities, as well as Landau-like damping. The instabilities may lead to break-up and focusing of ultra-high intensity multi-beam systems, which in conjunction with the damping may result in stationary strong field structures. The results could be of relevance for the next generation of laser-plasma systems.

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。

↑