Black holes and qubits

Duff, M. J.

doi:10.1142/9789814522489_0003

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2018

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“…Giddings (occasionally with collaborators) has perhaps done the most to investigate unitary nonlocal models for quantum gravity [2,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26]. For other black hole qubit models, see [27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56].…”

Section: Introductionmentioning

confidence: 99%

Qubit transport model for unitary black hole evaporation without firewalls

Osuga

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2018

Phys. Rev. D

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We give an explicit toy qubit transport model for transferring information from the gravitational field of a black hole to the Hawking radiation by a continuous unitary transformation of the outgoing radiation and the black hole gravitational field. The model has no firewalls or other drama at the event horizon, and it avoids a counterargument that has been raised for subsystem transfer models as resolutions of the firewall paradox. Furthermore, it fits the set of six physical constraints that Giddings has proposed for models of black hole evaporation. It does utilize nonlocal qubits for the gravitational field but assumes that the radiation interacts locally with these nonlocal qubits, so in some sense the nonlocality is confined to the gravitational sector. Although the qubit model is too crude to be quantitatively correct for the detailed spectrum of Hawking radiation, it fits qualitatively with what is expected.

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