On low energy quantum gravity induced effects on the propagation of light

Details On low energy quantum gravity induced effects on the propagation of light On low energy quantum gravity induced effects on the propagation of light

2003-04-11

arxiv.org/abs/gr-qc/0304048v1

Class.Quant.Grav. 20 (2003) 4375-4386

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

12 pages

Scientific paper

10.1088/0264-9381/20/20/303

Present models describing the interaction of quantum Maxwell and gravitational fields predict a breakdown of Lorentz invariance and a non standard dispersion relation in the semiclassical approximation. Comparison with observational data however, does not support their predictions. In this work we introduce a different set of ab initio assumptions in the canonical approach, namely that the homogeneous Maxwell equations are valid in the semiclassical approximation, and find that the resulting field equations are Lorentz invariant in the semiclassical limit. We also include a phenomenological analysis of possible effects on the propagation of light, and their dependence on energy, in a cosmological context.

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