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Locality in quantum gravity and string theory

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arxiv hep-th/0604072 v2 pith:4IAA3PKM submitted 2006-04-10 hep-th gr-qc

Locality in quantum gravity and string theory

classification hep-th gr-qc
keywords localityphysicsstringtheorygravitationallocalnonlocalityquantum
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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Cited by 2 Pith papers

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