Quantum hair and quantum gravity

A black hole may carry quantum numbers that are not associated with massless gauge fields, contrary to the spirit of the 'no-hair' theorems. The 'quantum hair' is invisible in the classical limit, but measurable via quantum interference experiments. Quantum hair alters the temper...

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Bibliographic Details
Published in:General relativity and gravitation 1992-01, Vol.24 (1), p.9-16
Main Authors: Coleman, Sidney, Krauss, Lawrence M., Preskill, John, Wilczek, Frank
Format: Article
Language:English
Subjects:
BLACK HOLES
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
FIELD THEORIES
GAUGE INVARIANCE
GENERAL RELATIVITY THEORY
GRAVITATIONAL COLLAPSE
INVARIANCE PRINCIPLES
MECHANICS
QUANTUM FIELD THEORY 661300 > Other Aspects of Physical Science-- (1992-)
QUANTUM GRAVITY
QUANTUM MECHANICS
QUANTUM NUMBERS
SEMICLASSICAL APPROXIMATION
STELLAR RADIATION
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Summary:A black hole may carry quantum numbers that are not associated with massless gauge fields, contrary to the spirit of the 'no-hair' theorems. The 'quantum hair' is invisible in the classical limit, but measurable via quantum interference experiments. Quantum hair alters the temperature of the radiation emitted by a black hole. It also induces non-zero expectation values for fields outside the event horizon; these expectation values are non-perturbative in [Dirac h], and decay exponentially far from the hole. The existence of quantum hair demonstrates that a black hole can have an intricate quantum-mechanical structure that is completely missed by standard semiclassical theory.
ISSN:0001-7701
1572-9532
DOI:10.1007/BF00756870