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Gravity's Rainbow: Limits for the applicability of the equivalence principle

Rene Lafrance, Robert C. Myers

hep-tharXiv:hep-th/9411018

Abstract

Limits for the applicability of the equivalence principle are considered in the context of low-energy effective field theories. In particular, we find a class of higher-derivative interactions for the gravitational and electromagnetic fields which produce dispersive photon propagation. The latter is illustrated by calculating the energy-dependent contribution to the deflection of light rays.

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