Gravitational spin Hall effect of light
Gravitational spin Hall effect of light
复制标题
光的引力自旋霍尔效应
DOI：
10.1103/physrevd.102.024075
复制
发表时间：
2020
影响因子：
5
通讯作者：
Andersson, Lars
中科院分区：
文献类型：
--
作者：
Oancea, Marius A.;Joudioux, Jérémie;Dodin, I. Y.;Ruiz, D. E.;Paganini, Claudio F.;Andersson, Lars
电磁波在真空中的传播通常在几何光学近似中描述，该近似预测波射线遵循零测地线。然而，该模型仅在无限高频率的限制下有效。在大但有限的频率下，衍射仍然可以忽略不计，但射线动力学会受到波偏振演化的影响。因此，光线可以偏离零测地线，这被称为光的引力自旋霍尔效应。在文献中，已经针对许多特殊情况专门计算了这种效应，但没有提出一般性描述。在这里，我们根据光在任意弯曲时空中传播的第一原理提出了协变 Wentzel-Kramers-Brillouin 分析。我们获得了描述光的引力自旋霍尔效应的偏振相关光线方程。我们还提出了史瓦西时空中偏振相关射线动力学的数值例子，并简要讨论了效应的大小。这里报告的分析类似于非均匀介质中光的自旋霍尔效应的分析，该分析已经过实验验证。
The propagation of electromagnetic waves in vacuum is often described within the geometrical optics approximation, which predicts that wave rays follow null geodesics. However, this model is valid only in the limit of infinitely high frequencies. At large but finite frequencies, diffraction can still be negligible, but the ray dynamics becomes affected by the evolution of the wave polarization. Hence, rays can deviate from null geodesics, which is known as the gravitational spin Hall effect of light. In the literature, this effect has been calculatedad hocfor a number of special cases, but no general description has been proposed. Here, we present a covariant Wentzel-Kramers-Brillouin analysis from first principles for the propagation of light in arbitrary curved spacetimes. We obtain polarization-dependent ray equations describing the gravitational spin Hall effect of light. We also present numerical examples of polarization-dependent ray dynamics in the Schwarzschild spacetime, and the magnitude of the effect is briefly discussed. The analysis reported here is analogous to that of the spin Hall effect of light in inhomogeneous media, which has been experimentally verified.