Is it possible to recover information from the black-hole radiation?

Details Is it possible to recover information from the black-hole radiation? Is it possible to recover information from the black-hole radiation?

1993-03-02

arxiv.org/abs/hep-th/9303011v1

Phys.Rev. D48 (1993) 1652-1658

Physics

High Energy Physics

High Energy Physics - Theory

9 pages (2 figures available upon request), CERN-TH 6811/93, (LateX file)

Scientific paper

10.1103/PhysRevD.48.1652

In the framework of communication theory, we analyse the gedanken experiment in which beams of quanta bearing information are flashed towards a black hole. We show that stimulated emission at the horizon provides a correlation between incoming and outgoing radiations consisting of bosons. For fermions, the mechanism responsible for the correlation is the Fermi exclusion principle. Each one of these mechanisms is responsible for the a partial transfer of the information originally coded in the incoming beam to the black--hole radiation. We show that this process is very efficient whenever stimulated emission overpowers spontaneous emission (bosons). Thus, black holes are not `ultimate waste baskets of information'.

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