Obstruction of black hole singularity by quantum field theory effects

by Mr Jahed Abedi (Sharif University of Technology)

Thursday 29 Oct 2015, 11:00 → 12:00 Asia/Tehran

Larak

We consider the back reaction of the energy due to quantum fluctuation of the background fields considering the trace anomaly for Schwarzschild black hole. It is shown that it will result in modification of the horizon and also formation of an inner horizon. We show that the process of collapse of a thin shell stops before formation of the singularity at a radius slightly smaller than the inner horizon at the order of (M/Mp)^1/3 lp. After the stop the reverse process takes place. Thus we demonstrate that without turning on quantum gravity and just because of quantum fluctuations of the vacuum the formation of the singularity through collapse is obstructed.