Lorentz invariant intrinsic decoherence

Details Lorentz invariant intrinsic decoherence Lorentz invariant intrinsic decoherence

2003-08-07

arxiv.org/abs/gr-qc/0308021v1

New J.Phys.8:96,2006

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

This paper generalises an earlier model published as Phys. Rev. A vol44, 5401 (1991)

Scientific paper

10.1088/1367-2630/8/6/096

Quantum decoherence can arise due to classical fluctuations in the parameters which define the dynamics of the system. In this case decoherence, and complementary noise, is manifest when data from repeated measurement trials are combined. Recently a number of authors have suggested that fluctuations in the space-time metric arising from quantum gravity effects would correspond to a source of intrinsic noise, which would necessarily be accompanied by intrinsic decoherence. This work extends a previous heuristic modification of Schr\"{o}dinger dynamics based on discrete time intervals with an intrinsic uncertainty. The extension uses unital semigroup representations of space and time translations rather than the more usual unitary representation, and does the least violence to physically important invariance principles. Physical consequences include a modification of the uncertainty principle and a modification of field dispersion relations, in a way consistent with other modifications suggested by quantum gravity and string theory .

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