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

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'.

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

References in corpus (8)

• Black Holes and Massive Remnants
• Are Horned Particles the Climax of Hawking Evaporation?
• Black Hole Remnants and the Information Puzzle
• Hawking Radiation and Back-Reaction
• Quantum Limitations on the Storage and Transmission of Information
• How Fast Does Information Leak out from a Black Hole?
• On the connection between Quantum Mechanics and the geometry of two-dimensional strings
• Measuring the $W$-hair of String Black Holes

Cited by in corpus (11)

• Information in Black Hole Radiation
• Black Hole Information
• Quantum Mechanics, Common Sense and the Black Hole Information Paradox
• Information retrieval from black holes
• Extracting information about the initial state from the black hole radiation
• Recovery of information from black hole radiation by considering stimulated emission
• Black holes are almost optimal quantum cloners
• The Physics of Information
• Stimulated Emission of Radiation and the Black Hole Information Problem
• Classical information transmission capacity of quantum black holes
• Paradox No More: How Stimulated Emission of Radiation Preserves Information Absorbed by Black Holes