Hi all,

on Monday Ali Akil will talk about “Quantum Superposition Of Black Hole Evaporations”. The talk will take place at 15:00 in HIT J 52. See below for the abstract.

Best, Ladina

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Title:

Quantum Superposition Of Black Hole Evaporations

Abstract:

We revisit Hawking’s black hole evaporation process, allowing a quantum superposition of black hole masses. The Hawking particles created inside the black hole are assumed to annihilate with the black hole matter. Since the Hawking particles have an undetermined energy, the black hole evolves into a superposition of being fully evaporated and not fully evaporated. In the branches of the superposition where the matter is fully evaporated, the outgoing Hawking particles encode the initial state of the black hole matter. In the branches where the black hole is not fully evaporated, more Hawking particle pairs continue to be created. We model this branch-dependent pair creation with controlled unitaries, which take into account the back-reaction of the radiation emission on the black hole state. With every burst of radiation the probability of the full annihilation strictly increases, until the black hole is (asymptotically) fully evaporated in every branch of the quantum superposition. In this model the evaporation is unitary and the initial state can in principle be recovered from the radiation.