克尔的世界表
A worldsheet for Kerr
摘要：
我们表明，精确克尔解的纽曼-詹尼斯位移属性可以解释在一个世界表有效的行动。这在重力和电动力学中的单拷贝$\sqrt{\text{Kerr}}$解中都成立。在运动方程的水平上，我们证明了Newman-Janis位移也适用于Kerr黑洞的主导相互作用。这些领先的相互作用方便地描述使用手征经典运动方程的帮助下，旋度螺旋方法熟悉的散射振幅。
英文摘要：
We show that the Newman-Janis shift property of the exact Kerr solution can be interpreted in terms of a worldsheet effective action. This holds both in gravity, and for the single-copy $\sqrt{\text{Kerr}}$ solution in electrodynamics. At the level of equations of motion, we show that the Newman-Janis shift holds also for the leading interactions of the Kerr black hole. These leading interactions are conveniently described using chiral classical equations of motion with the help of the spinor-helicity method familiar from scattering amplitudes.
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