A closer glance at black hole pair creation
arXiv:2103.05782 · doi:10.1103/PhysRevD.104.024044
Abstract
We consider accelerated black hole horizons with and without defects. These horizons appear in the -metric solution to Einstein equations and in its generalization to the case where external fields are present. These solutions realize a variety of physical processes, from the decay of a cosmic string by a black hole pair nucleation to the creation of a black hole pair by an external electromagnetic field. Here, we show that such geometries exhibit an infinite set of symmetries in their near horizon region, generalizing in this way previous results for smooth isolated horizons. By considering the limit close to both the black hole and the acceleration horizons, we show that a sensible set of asymptotic boundary conditions gets preserved by supertranslation and superrotation transformations. By acting on the geometry with such transformations, we derive the superrotated, supertranslated version of the -metric and compute the associated conserved charges.
arXiv comment22 pages. v2, substantially extended; two new sections, one author added
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