# Entanglement swapping in black holes: restoring predictability. (arXiv:1805.09573v2 [hep-th] UPDATED)

Hawking's black hole evaporation process suggests that we may need to choose

between quantum unitarity and other basic physical principles such as

no-signalling, entanglement monogamy, and the equivalence principle. We here

provide a quantum model for Hawking pair black hole evaporation within which

these principles are all respected. The model does not involve exotic new

physics, but rather uses quantum theory and general relativity. The black hole

and radiation are in a joint superposition of different energy states at any

stage of the evaporation process. In the particular branch where the black hole

mass is 0, the radiation state is pure and one-to-one with the initial state

forming the black hole. Thus there is no information loss upon full

evaporation. The original Hawking's pair entanglement between infalling and

outgoing particles gets transferred to outgoing particles via entanglement

swapping, without violation of no-signalling or the entanglement's monogamy.

The final state after the full black hole evaporation is pure, without loss of

information, violation of monogamy, or the equivalence principle.