Are black holes totally black?

Massive Superstrings Are Black Holes

We argue that it is inconsistent to ignore the gravitational backreaction for on-shell superstring states at the Planck mass and beyond, and that these quantum states become Kerr black holes in the classical limit. Consequences are discussed.

Nonextremal black holes are BPS

Extremal charged black holes are BPS solutions. It is commonly thought that their nonextremal counterparts are not. Further, experience with BPS solutions in flat spacetime suggests that all BPS solutions are supersymmetric; i.e. that they are invariant under some supersymmetry charges of either the original field theory or an appropriately extended version thereof. Using nonextremal Reissner-N...

Dirty Black Holes and Hairy Black Holes.

An approach based on considerations of the non-classical energy momentum tensor outside the event horizon of a black hole provides additional physical insight into the nature of discrete quantum hair on black holes and its effect on black hole temperature. Our analysis both extends previous work based on the Euclidean action techniques, and corrects an omission in that work. We also raise sever...

Wormholes are Quantum Entangled Black Holes?

Black Holes Are Almost Optimal Quantum Cloners

We show that black holes clone incoming quantum states with a fidelity that depends on the black hole’s absorption coefficient. Perfectly reflecting black holes are optimal universal quantum cloners of the type described by Simon, Weihs, and Zeilinger [1], and operate on the principle of stimulated emission. In the limit of perfect absorption, the fidelity of clones is equal to what can be obta...