München 2019 – scientific programme
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GR: Fachverband Gravitation und Relativitätstheorie
GR 14: Poster Session (posters are permanently on display)
GR 14.7: Poster
Thursday, March 21, 2019, 16:30–18:30, HS 6
Quantum-improved Schwarzschild-(A)dS and Kerr-(A)dS Spacetimes — •Dennis Stock1,2 and Jan M. Pawlowski2 — 1University of Bremen, Center of Applied Space Technology and Microgravity (ZARM), 28359 Bremen, Germany — 2Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg, Germany
We study the effects of quantum gravity on black hole geometries within the set-up of asymptotically safe quantum gravity. Under the assumption that leading order quantum effects are taken into account by promoting Newton’s and the cosmological constant to scale-dependent functions, we arrive at a quantum-improved metric for Schwarzschild- (A)dS and Kerr-(A)dS. Because scale identifications based on a radial path or the eigentime of an infalling observer in the quantum improved geometry lead to problems, we base our scale identification on the upgraded classical Kretschmann scalar. The arising spacetimes are discussed by studying the Penrose diagrams, the motion of test particles, the effect on the central curvature singularity and the implication for the endpoint of the black hole evaporation process.