Entropy and spectrum of near-extremal black holes: semiclassical brane solutions to non-perturbative problems

Entropy and spectrum of near-extremal black holes: semiclassical brane solutions to non-perturbative problems Author(s) Hernández-Cuenca, SergioAbstract The black hole entropy has been observed to generically turn negative at exponentially low temperatures T ~ e − S 0 in the extremal Bekenstein-Hawking entropy S0, a seeming pathology often attributed to missing non-perturbative effects. In fact, we show that this negativity must happen for any effective theory of quantum gravity with an...