Spacetime topology change and black hole information

Details Spacetime topology change and black hole information Spacetime topology change and black hole information

2006-08-25

arxiv.org/abs/hep-th/0608175v3

Phys.Lett.B644:67-71,2007

Physics

High Energy Physics

High Energy Physics - Theory

5 pages, 5 figures, revtex. Added references to v2. v3 is published version, to appear in Physics Letters B

Scientific paper

10.1016/j.physletb.2006.11.016

Topology change -- the creation of a disconnected baby universe -- due to black hole collapse may resolve the information loss paradox. Evolution from an early time Cauchy surface to a final surface which includes a slice of the disconnected region can be unitary and consistent with conventional quantum mechanics. We discuss the issue of cluster decomposition, showing that any violations thereof are likely to be unobservably small. Topology change is similar to the black hole remnant scenario and only requires assumptions about the behavior of quantum gravity in planckian regimes. It does not require non-locality or any modification of low-energy physics.

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