How Fast Does Information Leak out from a Black Hole?

Details How Fast Does Information Leak out from a Black Hole? How Fast Does Information Leak out from a Black Hole?

1993-01-15

arxiv.org/abs/hep-th/9301058v1

Phys.Rev.Lett. 70 (1993) 3680-3683

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, plain TeX, UCSBTH-93-02

Scientific paper

10.1103/PhysRevLett.70.3680

Hawking's radiance, even as computed without account of backreaction, departs from blackbody form due to the mode dependence of the barrier penetration factor. Thus the radiation is not the maximal entropy radiation for given energy. By comparing estimates of the actual entropy emission rate with the maximal entropy rate for the given power, and using standard ideas from communication theory, we set an upper bound on the permitted information outflow rate. This is several times the rates of black hole entropy decrease or radiation entropy production. Thus, if subtle quantum effects not heretofore accounted for code information in the radiance, the information that was thought to be irreparably lost down the black hole may gradually leak back out from the black hole environs over the full duration of the hole's evaporation.

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