Quantum hair and black hole information
Xavier Calmet, Stephen D. H. Hsu
Abstract
It has been shown that the quantum state of the graviton field outside a black hole horizon carries information about the internal state of the hole. We explain how this allows unitary evaporation: the final radiation state is a complex superposition which depends linearly on the initial black hole state. Under time reversal, the radiation state evolves back to the original black hole quantum state. Formulations of the information paradox on a fixed semiclassical geometry describe only a small subset of the evaporation Hilbert space, and do not exclude overall unitarity.
Topics & Concepts
PhysicsBlack hole information paradoxBlack hole complementarityBlack hole (networking)Hawking radiationExtremal black holeWhite holeBlack hole thermodynamicsQuantum mechanicsQuantum stateUnitaritySemiclassical physicsVirtual black holeTheoretical physicsMicro black holeClassical mechanicsQuantum electrodynamicsQuantumRouting (electronic design automation)Routing protocolComputer networkEntropy (arrow of time)PlanckLink-state routing protocolComputer scienceBlack Holes and Theoretical PhysicsCosmology and Gravitation TheoriesNoncommutative and Quantum Gravity Theories