Phys. Rev. D 64, 083007 (2001) [4 pages]Astrophysical limits on quantum gravity motivated birefringenceReceived 21 February 2001; published 24 September 2001 We obtain observational upper bounds on a class of quantum gravity related birefringence effects, by analyzing the presence of linear polarization in the optical and ultraviolet spectrum of some distant sources. In the notation of Gambini and Pullin we find χ<5×10-5. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.64.083007
DOI:
10.1103/PhysRevD.64.083007
PACS:
98.70.Rz, 03.30.+p, 04.60.-m
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