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arXiv 2006.10077gr-qc
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光的引力法拉第效应和自旋霍尔效应

Gravitational Faraday and Spin-Hall Effects of Light

Andrey A. Shoom

摘要:

光的引力法拉第效应及其对偶自旋霍尔效应产生于角动量不为零的时空中。这些效应是在静止的、渐近平坦的时空中研究的。在这里,我们研究这些影响在任意的,非平稳的,渐近平坦的时空。这些效应是由于光的偏振和时空角动量之间的相互作用而产生的。由于这种相互作用,左旋和右旋圆偏振光的相速度变得不同,这导致了引力法拉第效应。这种差异意味着这些成分的不同动力学,它们开始沿着不同的路径传播\textemdash,即光的引力自旋-霍尔效应。由于这种效应,引力场将非偏振光的多分量光束分裂,产生偏振引力彩虹。组分分离是在长程渐近中观察到的累积效应。为了研究这种效应,我们构造了一致程函展开,并导出了描述这种效应的动力学方程。为了分析动力学方程,我们将其表示为局部时空分解形式。在相关的光学度规中提出的方程的空间部分类似于在科里奥利力的影响下在磁场中运动的带电粒子的动力学方程。

英文摘要:

The gravitational Faraday and its dual spin-Hall effects of light arise in space-times of non-zero angular momentum. These effects were studied in stationary, asymptotically flat space-times. Here we study these effects in arbitrary, non-stationary, asymptotically flat space-times. These effects arise due to interaction between light polarisation and space-time angular momentum. As a result of such interaction, the phase velocity of left- and right-handed circularly polarised light becomes different, that results in the gravitational Faraday effect. This difference implies different dynamics of these components, that begin to propagate along different paths\textemdash the gravitational spin-Hall effect of light. Due to this effect, the gravitational field splits a multicomponent beam of unpolarized light and produces polarized gravitational rainbow. The component separation is an accumulative effect observed in long range asymptotics. To study this effect, we construct uniform eikonal expansion and derive dynamical equation describing this effect. To analyse the dynamical equation, we present it in the local space and time decomposition form. The spatial part of the equation presented in the related optical metric is analogous to the dynamical equation of a charged particle moving in magnetic field under influence of the Coriolis force.

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