Comments on the black hole information problem

Details Comments on the black hole information problem Comments on the black hole information problem

2006-01-10

arxiv.org/abs/hep-th/0601059v2

Phys.Rev.D73:104027,2006

Physics

High Energy Physics

High Energy Physics - Theory

18 pages, 2 figures, revtex, v2 figure added and some improvements to presentation

Scientific paper

10.1103/PhysRevD.73.104027

String theory provides numerous examples of duality between gravitational theories and unitary gauge theories. To resolve the black hole information paradox in this setting, it is necessary to better understand how unitarity is implemented on the gravity side. We argue that unitarity is restored by nonlocal effects whose initial magnitude is suppressed by the exponential of the Bekenstein-Hawking entropy. Time-slicings for which effective field theory is valid are obtained by demanding the mutual back-reaction of quanta be small. The resulting bounds imply that nonlocal effects do not lead to observable violations of causality or conflict with the equivalence principle for infalling observers, yet implement information retrieval for observers who stay outside the black hole.

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