Breaking Diffeomorphism Invariance and Tests for the Emergence of Gravity
General Relativity and Quantum Cosmology
2013-05-29 v2 High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
If general relativity is an emergent phenomenon, there may be small violations of diffeomorphism invariance. We propose a phenomenology of perturbatively small violations of general relativity by the inclusion of terms which break general covariance. These can be tested by matching to the Parametrized Post Newtonian (PPN) formalism. The most sensitive tests involve pulsar timing and provide an extremely strong bound, with a dimensionless constraint of order 10^{-20} relative to gravitational strength.
Keywords
Cite
@article{arxiv.0911.4123,
title = {Breaking Diffeomorphism Invariance and Tests for the Emergence of Gravity},
author = {Mohamed M. Anber and Ufuk Aydemir and John F. Donoghue},
journal= {arXiv preprint arXiv:0911.4123},
year = {2013}
}
Comments
13 pages