Decoherence, Re-coherence, and the Black Hole Information Paradox

Details Decoherence, Re-coherence, and the Black Hole Information Paradox Decoherence, Re-coherence, and the Black Hole Information Paradox

1994-11-30

arxiv.org/abs/gr-qc/9411073v1

Phys.Rev.D52:2221-2231,1995

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

23 pages, 2 figures included, figures 3.1 - 3.3 available at http://qso.lanl.gov/papers/Papers.html

Scientific paper

10.1103/PhysRevD.52.2221

We analyze a system consisting of an oscillator coupled to a field. With the field traced out as an environment, the oscillator loses coherence on a very short {\it decoherence timescale}; but, on a much longer {\it relaxation timescale}, predictably evolves into a unique, pure (ground) state. This example of {\it re-coherence} has interesting implications both for the interpretation of quantum theory and for the loss of information during black hole evaporation. We examine these implications by investigating the intermediate and final states of the quantum field, treated as an open system coupled to an unobserved oscillator.

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