Role of momentum and velocity for radiating electrons
Role of momentum and velocity for radiating electrons
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DOI：
10.1103/physrevd.93.045034
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发表时间：
2016-02-26
影响因子：
5
通讯作者：
Jaroszynski, Dino A.
中科院分区：
文献类型：
--
作者：
Capdessus, Remi;Noble, Adam;Jaroszynski, Dino A.
辐射反应是电动力学中最令人感兴趣的问题之一。几拍瓦的激光设备的发展能够达到极端强度，这给这个话题带来了新的紧迫性，现在比以往任何时候都更重要的是要正确地理解它。两个模型的辐射反应，由于朗道和利夫希茨和由于索科洛夫，已经获得了突出，但很少有工作探索两者之间的关系。我们表明，在Sokolov理论中，电磁场诱导动量和速度之间的洛伦兹变换，这消除了一些违反直觉的结果的Landau-Lifshitz。特别是，在恒定电场中的洛伦兹增强导致粒子比其他情况下更快地失去静电势能，解释了电子如何在没有辐射反作用力的情况下辐射的长期谜团。这些想法都说明了相关的天体物理学和激光粒子相互作用的例子，辐射反应的影响是特别突出的。
Radiation reaction remains one of the most fascinating open questions in electrodynamics. The development of multi-petawatt laser facilities capable of reaching extreme intensities has lent this topic a new urgency, and it is now more important than ever to properly understand it. Two models of radiation reaction, due to Landau and Lifshitz and due to Sokolov, have gained prominence, but there has been little work exploring the relation between the two. We show that in the Sokolov theory, electromagnetic fields induce a Lorentz transformation between momentum and velocity, which eliminates some of the counterintuitive results of Landau-Lifshitz. In particular, the Lorentz boost in a constant electric field causes the particle to lose electrostatic potential energy more rapidly than it otherwise would, explaining the longstanding mystery of how an electron can radiate while experiencing no radiation reaction force. These ideas are illustrated in examples of relevance to astrophysics and laser-particle interactions, where radiation reaction effects are particularly prominent.