Breakdown of field theory in near-horizon regions

Abstract

Abstract We discuss back-reaction in the semiclassical treatment of quantum fields near a black hole. When the state deviates significantly from Hartle-Hawking, simple energetic considerations of back-reaction give rise to a characteristic radial distance scale ∼ r s 2 G N 1 / D $$ {\left({r}_s^2{G}_N\right)}^{1/D} $$ , below which some breakdown of effective field theory may occur.

Keywords

• Black Holes
• Models of Quantum Gravity