Output details

Better late than never : Information retrieval from black holes

<10>(Quantum Information Theory.) This work discovered the phenomenon whereby loss of entanglement during a black hole's evaporation can lead to a complete loss of entanglement across the event horizon, leading to an "energetic curtain" (more recently called a "firewall") descending around the event horizon. Such a phenomenon occurring while a black hole is still large would lead to a manifest violation of the equivalence principle. We show how explicitly including entanglement across the horizon delays the onset of this curtain. The equivalence principle is preserved throughout evaporation provided the entropy of entanglement of a black hole is its thermodynamic entropy.