Bulg. J. Phys. vol.29 no.1-2 (2002), pp. 01-08

Is Cosmological Birefringence due to Quantum Gravitational Effects or an Intrinsic Anisotropy of Space Time

C. Wolf
Department of Physics, Massachusetts State College of Liberal Arts North Adams, Massachusetts 01247 USA
Abstract. By considering the non-standard optics generated by a polymer-like structure of space-time in loop-quantum gravity we demonstrate that such a theory predicts signatures of cosmological birefringence and time delay effects in gamma ray bursts that differ from those predicted by a theory that admits to an intrinsic anisotropy of space-time.

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