Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 5, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP05(2020)004
Keywords
AdS-CFT Correspondence; Black Holes; Conformal Field Theory; Models of Quantum Gravity
Categories
Funding
- International Doctoral Fellowship from the University of British Columbia
- Simons Foundation via the It From Qubit Collaboration
- Simons Investigator Award
- Natural Sciences and Engineering Research Council of Canada
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In this note, following [1-3], we introduce and study various holographic systems which can describe evaporating black holes. The systems we consider are boundary conformal field theories for which the number of local degrees of freedom on the boundary (c(bdy)) is large compared to the number of local degrees of freedom in the bulk CFT (c(bulk)). We consider states where the boundary degrees of freedom on their own would describe an equilibrium black hole, but the coupling to the bulk CFT degrees of freedom allows this black hole to evaporate. The Page time for the black hole is controlled by the ratio c(bdy)/c(bulk). Using both holographic calculations and direct CFT calculations, we study the evolution of the entanglement entropy for the subset of the radiation system (i.e. the bulk CFT) at a distance d > a from the boundary. We find that the entanglement entropy for this subsystem increases until time a + t(Page) and then undergoes a phase transition after which the entanglement wedge of the radiation system includes the black hole interior. Remarkably, this occurs even if the radiation system is initially at the same temperature as the black hole so that the two are in thermal equilibrium. In this case, even though the black hole does not lose energy, it radiates information through interaction with the radiation system until the radiation system contains enough information to reconstruct the black hole interior.
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