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

TL;DR

This paper explores whether information can be recovered from black-hole radiation, demonstrating that stimulated emission and quantum principles enable partial information transfer, challenging the idea that black holes destroy information.

Contribution

It introduces a communication-theoretic analysis of black-hole radiation, showing mechanisms for information transfer via stimulated emission and quantum exclusion principles.

Findings

Stimulated emission correlates incoming and outgoing bosonic radiation.

Fermi exclusion principle facilitates information transfer for fermions.

Information transfer efficiency increases when stimulated emission dominates spontaneous emission.

Abstract

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'.