Speaker
Francesco Ferrarin
(University of Copenhagen, Niels Bohr Institute)
Description
Recent work has revealed that extremal Kerr black holes may exhibit a sensitivity to higher-derivative corrections to Einstein's equations, displaying singularities in the tidal forces at the horizon. However, in a purely gravitational context, this "ultraviolet sensitivity" translates into a strong dependence on the Wilson coefficients in the low-energy effective field theory. These, in turn, are fixed by the underlying theory of quantum gravity in the ultraviolet. We find a prediction for these coefficients within the framework of asymptotically safe quantum gravity, and show that, if the quantum gravity scale is trans-Planckian, this horizon-scale ultraviolet sensitivity is avoided.
Authors
Prof.
Alessia Platania
(NBI, University of Copenhagen)
Francesco Del Porro
(Niels Bohr Institute)
Francesco Ferrarin
(University of Copenhagen, Niels Bohr Institute)