Quantum hair and quantum gravity |
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| Authors: | Sidney Coleman Lawrence M. Krauss John Preskill Frank Wilczek |
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| Affiliation: | (1) Lyman Laboratory of Physics, Harvard University, 02138 Cambridge, Massachusetts, USA;(2) Center for Theoretical Physics and Department of Astronomy, Yale University, 06511 New Haven, Connecticut, USA;(3) Lauritsen Laboratory of High Energy Physics, California Institute of Technology, 91125 Pasadena, California, USA;(4) School of Natural Sciences, Institute for Advanced Study, Olden Lane, 08540 Princeton, New Jersey, USA |
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| Abstract: | ![]()
A black hole may carry quantum numbers that arenot 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  , 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.Based on an essay which received second award from the Gravity Research Foundation, 1991 |
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