论文标题
部分可观测时空混沌系统的无模型预测
Exact Parallel Waves in General Relativity
论文作者
论文摘要
我们对基本定义和主要结果进行了综述，研究了波动的空间，这是空间的，其指标模型以光速运动质量无质量的辐射，尤其是针对那些具有平行射线的几何形状。特别是，我们激励和联系他们的各种定义，概述其坐标描述，并在其研究中以一种更容易获得现代读者使用的语言，包括“无效坐标”和Penrose限制的构建。我们还详细介绍了有关PP波段因果关系的最新工作，并描述了解决该领域的一个开放问题的进展 - Ehlers-Kundt的猜想。
We conduct a review of the basic definitions and the principal results in the study of wavelike spacetimes, that is spacetimes whose metric models massless radiation moving at the speed of light, focusing in particular on those geometries with parallel rays. In particular, we motivate and connect their various definitions, outline their coordinate descriptions and present some classical results in their study in a language more accessible to modern readers, including the existence of "null coordinates" and the construction of Penrose limits. We also present a thorough summary of recent work on causality in pp-waves, and describe progress in addressing an open question in the field - the Ehlers-Kundt conjecture.
