Obstruction of black hole singularity by quantum field theory effects

Understand

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 $(c_{A}\frac{M}{M_p})^{1/3}l_p$.
• After the collapse stops the reverse process takes place.