AdS/CFT and the Information Paradox

Details AdS/CFT and the Information Paradox AdS/CFT and the Information Paradox

1999-03-26

arxiv.org/abs/hep-th/9903237v2

Phys.Rev. D60 (1999) 104012

Physics

High Energy Physics

High Energy Physics - Theory

16 pages, harvmac, reference added, minor corrections

Scientific paper

10.1103/PhysRevD.60.104012

The information paradox in the quantum evolution of black holes is studied within the framework of the AdS/CFT correspondence. The unitarity of the CFT strongly suggests that all information about an initial state that forms a black hole is returned in the Hawking radiation. The CFT dynamics implies an information retention time of order the black hole lifetime. This fact determines many qualitative properties of the non-local effects that must show up in a semi-classical effective theory in the bulk. We argue that no violations of causality are apparent to local observers, but the semi-classical theory in the bulk duplicates degrees of freedom inside and outside the event horizon. Non-local quantum effects are required to eliminate this redundancy. This leads to a breakdown of the usual classical-quantum correspondence principle in Lorentzian black hole spacetimes.

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