Macroscopic observables and Lorentz violation in discrete quantum gravity

Details Macroscopic observables and Lorentz violation in discrete quantum gravity Macroscopic observables and Lorentz violation in discrete quantum gravity

2006-04-10

arxiv.org/abs/gr-qc/0604040v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

15 pages, 1 figure, laTeX

Scientific paper

This article concerns the fate of local Lorentz invariance in quantum gravity, particularly for approaches in which a discrete structure replaces continuum spacetime. Some features of standard quantum mechanics, presented in a sum-over-histories formulation, are reviewed, and their consequences for such theories are discussed. It is argued that, if the individual histories of a theory give bad approximations to macroscopic continuum properties in some frames, then it is inevitable that the theory violates Lorentz symmetry.

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