从后向散射电磁辐射推断黑洞电荷
Inferring black hole charge from backscattered electromagnetic radiation
摘要：
计算了电磁波入射时Reissner-Nordström黑洞的散射截面。我们描述了如何散射的电磁引力辐射的转换，以及由黑洞电荷引起的相移的宇称依赖性的影响。后一种效果会创建在向后方向上非零的螺旋度反转散射振幅。我们表明，从向后散射的电磁波的性质，它是可能的，在原则上，以推断，如果一个静态的黑洞是带电的。
英文摘要：
We compute the scattering cross section of Reissner-Nordström black holes for the case of an incident electromagnetic wave. We describe how scattering is affected by both the conversion of electromagnetic to gravitational radiation, and the parity-dependence of phase shifts induced by the black hole charge. The latter effect creates a helicity-reversed scattering amplitude that is non-zero in the backward direction. We show that from the character of the electromagnetic wave scattered in the backward direction it is possible, in principle, to infer if a static black hole is charged.
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