用艾瓦激光探测真空中的光子-光子散射
Detecting photon-photon scattering in vacuum at exawatt lasers
摘要：
在最近的一篇论文中，我们指出QED非线性修正意味着对真空中交叉电磁波线性演化的相位修正。在这里，我们提供了一个更完整的分析，包括一个完整的数值解的QED非线性波方程的短距离传播的对称配置。这样的解决方案，我们使用我们的扰动动机的变分方法得到的结果，然后用于证明可以应用在更一般的情况下，解析近似的优秀协议。这使我们能够找到最有希望的配置，在光学实验中的光子-光子散射的搜索。特别是，我们表明，我们以前的要求之间的两个交叉光束的相位相干性可以释放。然后，我们提出了一个非常简单的实验，可以在未来的艾瓦激光设施，如ELI，通过轰击低功率激光束的艾瓦凸点。
英文摘要：
In a recent paper, we have shown that the QED nonlinear corrections imply a phase correction to the linear evolution of crossing electromagnetic waves in vacuum. Here, we provide a more complete analysis, including a full numerical solution of the QED nonlinear wave equations for short-distance propagation in a symmetric configuration. The excellent agreement of such a solution with the result that we obtain using our perturbatively-motivated Variational Approach is then used to justify an analytical approximation that can be applied in a more general case. This allows us to find the most promising configuration for the search of photon-photon scattering in optics experiments. In particular, we show that our previous requirement of phase coherence between the two crossing beams can be released. We then propose a very simple experiment that can be performed at future exawatt laser facilities, such as ELI, by bombarding a low power laser beam with the exawatt bump.
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