Physics – Quantum Physics
Scientific paper
2009-05-10
Int. J. Quant. Inf. 7 (2009) 847-878
Physics
Quantum Physics
31 pages, 6 figures; revised and extended version of an essay originally submitted as part of the requirements for a Certifica
Scientific paper
10.1142/S0219749909005596
Stephen Hawking's discovery of black hole evaporation had the remarkable consequence that information is destroyed by a black hole, which can only be accommodated by modifying the laws of quantum mechanics. Different attempts to evade the information loss paradox were subsequently suggested, apparently without a satisfactory resolution of the paradox. On the other hand, the attempting to include non-unitarity into quantum mechanics might lead to laws predicting observable consequences such as nonlocality or violation of energy-momentum conservation; but it may be possibly to circumvent these obstacles. Recent developments seem to require a different view on quantum gravity and suggest that ideas about locality in physics and Hawking's semi-classical approximation are misleading. An accurate description may show unitary evolution and no information loss after all.
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