Locality in quantum gravity and string theory

Details Locality in quantum gravity and string theory Locality in quantum gravity and string theory

2006-04-10

arxiv.org/abs/hep-th/0604072v2

Phys.Rev.D74:106006,2006

Physics

High Energy Physics

High Energy Physics - Theory

26 pages, 3 figures, harvmac. v2: minor changes to bring into accord with revised paper hep-th/0605196

Scientific paper

10.1103/PhysRevD.74.106006

Breakdown of local physics in string theory at distances longer than the string scale is investigated. Such nonlocality would be expected to be visible in ultrahigh-energy scattering. The results of various approaches to such scattering are collected and examined. No evidence is found for non-locality from strings whose length grows linearly with the energy. However, local quantum field theory does apparently fail at scales determined by gravitational physics, particularly strong gravitational dynamics. This amplifies locality bound arguments that such failure of locality is a fundamental aspect of physics. This kind of nonlocality could be a central element of a possible loophole in the argument for information loss in black holes.

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