Probing Planck-scale Physics with Extragalactic Sources?

Details Probing Planck-scale Physics with Extragalactic Sources? Probing Planck-scale Physics with Extragalactic Sources?

2003-02-18

arxiv.org/abs/astro-ph/0302372v3

Astrophys.J.591:L87-L90,2003

Astronomy and Astrophysics

Astrophysics

Minor changes; this version will appear in ApJ Letters

Scientific paper

10.1086/377121

At Planck-scale, spacetime is "foamy" due to quantum fluctuations predicted by quantum gravity. Here we consider the possibility of using spacetime foam-induced phase incoherence of light from distant galaxies and gamma-ray bursters to probe Planck-scale physics. In particular, we examine the cumulative effects of spacetime fluctuations over a huge distance. Our analysis shows that they are far below what is required in this approach to shed light on the foaminess of spacetime.

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