Photon dispersion in causal sets
Instrumentation and Methods for Astrophysics
2009-12-22 v1 High Energy Astrophysical Phenomena
Abstract
A very small dispersion in the speed of light may be observable in Fermi time- and energy-tagged data on variable sources, such as gamma-ray bursts (GRB) and active galactic nuclei (AGN). We describe a method to compute the size of this effect by applying the Feynman sum-over-histories formalism for relativistic quantum electrodynamics to a discrete model of space-time called \emph{causal set theory}.
Cite
@article{arxiv.0912.3839,
title = {Photon dispersion in causal sets},
author = {Jeffrey D. Scargle and Slobodan N. Simić},
journal= {arXiv preprint arXiv:0912.3839},
year = {2009}
}
Comments
2009 Fermi Symposium, eConf Proceedings C091122. 5 pages, 2 figures