Seminari INFN

Echoes from Quantum Black Holes

by Qingwen Wang (Perimetet Institute)

Europe/Rome
Aula Rasetti (Dipartimento di Fisica - Ed. G. Marconi)

Aula Rasetti

Dipartimento di Fisica - Ed. G. Marconi

Description
We study the reflectivity of quantum black hole (BH) horizons using detailed balance and fluctuation-dissipation theorem, finding a universal flux reflectivity given by the Boltzmann factor R = e-|ω|/T , where ω is frequency in the horizon frame and T is the Hawking temperature. This implies CP-symmetry (or RP3 topology) of the extended BH spacetime. We then briefly discuss related physical implications: We predict echoes in the ringdown of Kerr BHs, but they do not exhibit ergoregion instability. The viscosity in the membrane paradigm is modified to be frequency dependent, only approaching General Relativistic value at high frequencies.
Organised by

Daniele Barducci