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Quantum gravity phenomenology without Lorentz invariance violation: a detailed proposal

Yuri Bonder and Daniel Sudarsky

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We describe a scheme for the exploration of quantum gravity phenomenology focusing on effects that could be thought of as arising from a fundamental granularity of spacetime. In contrast with the simplest assumptions, such granularity is assumed to respect Lorentz invariance but is otherwise left unspecified. The proposal is fully observer covariant, it involves non-trivial couplings of curvature to matter fields and leads to a well-defined phenomenology. We present the effective Hamiltonian which could be used to analyze concrete experimental situations, some of which are briefly described, and we shortly discuss the degree to which the present proposal is in line with the fundamental ideas behind the equivalence principle.


PACS

04.60.-m Quantum gravity

MSC

83C45 Quantization of the gravitational field

83C75 Space-time singularities, cosmic censorship, etc.

Subjects

Gravitation and cosmology

Dates

Issue 10 (21 May 2008)

Received 10 December 2007, in final form 8 March 2008

Published 7 May 2008



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