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I'm guessing the idea is that in GR, the solution for a black hole with charge looks different from one without. So in principle you could infer the charge of
by antognini 1y ago
I'm guessing the idea is that in GR, the solution for a black hole with charge looks different from one without. So in principle you could infer the charge of a black hole based on the curvature of spacetime.
- hammock 1y agoAnd same logic applies to all masses, not only black holes. It’s just nearly impossible to calculate for anything besides a black hole, for a variety of reasons. Also, the reference to “known links between the solutions of Yang-Mills theory and those of gravity” (Y-M equations describing charge and EM field) seems to speculatively imply that charge-related information is encoded in the geometry of spacetime, alongside gravitational effects
- dataflow 1y agoThat's way over my head, sorry. How does the solution differ gravitationally, if the black hole isn't spinning? And how are positive and negative charges distinguished?