Lightcone fluctuations in quantum gravity and extra dimensions

Details Lightcone fluctuations in quantum gravity and extra dimensions Lightcone fluctuations in quantum gravity and extra dimensions

1999-07-08

arxiv.org/abs/gr-qc/9907037v4

Phys.Lett. B496 (2000) 107-112

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Two additional references added

Scientific paper

10.1016/S0370-2693(00)01287-9

We discuss how compactified extra dimensions may have potentially observable effects which grow as the compactification scale decreases. This arises because of lightcone fluctuations in the uncompactified dimensions which can result in the broadening of the spectral lines from distant sources. We analyze this effect in a five dimensional model, and argue that data from gamma ray burst sources require the compactification length to be greater than about $10^5$ cm in this model.

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