How fast can a black hole release its information?

Details How fast can a black hole release its information? How fast can a black hole release its information?

2009-05-27

arxiv.org/abs/0905.4483v1

Int.J.Mod.Phys.D18:2215-2219,2009

Physics

High Energy Physics

High Energy Physics - Theory

6 pages, Latex (Essay awarded honorable mention in the Gravity Research Foundation essay competition 2009)

Scientific paper

10.1142/S0218271809016004

When a shell collapses through its horizon, semiclassical physics suggests that information cannot escape from this horizon. One might hope that nonperturbative quantum gravity effects will change this situation and avoid the `information paradox'. We note that string theory has provided a set of states over which the wavefunction of the shell can spread, and that the number of these states is large enough that such a spreading would significantly modify the classically expected evolution. In this article we perform a simple estimate of the spreading time, showing that it is much shorter than the Hawking evaporation time for the hole. Thus information can emerge from the hole through the relaxation of the shell state into a linear combination of fuzzballs.

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