Speaker
Description
Black-hole uniqueness is expected to break in theories beyond General Relativity. This breaking can take a particularly strong form, if several branches of black-hole solutions beyond the Kerr solution coexist. We find an example of a theory that exhibits such strong breaking, where, at fixed couplings, two different scalarization mechanisms types coexist for spinning black holes. We test such theory through a more fundamental approach: we ask if this theory is compatible with asymptotic safety. This results in a phenomenological tool to discriminate between different quantum gravity theories. It turns out that it can be compatible only for extremely small black holes, of Planck mass size. This makes asymptotic safety and scalarization in astrophysical black holes incompatible.
| Affiliation | ITP-Heidelberg |
|---|---|
| Link to paper | https://arxiv.org/pdf/2603.05064 |
| Career status | PhD student |