On Cosmological Implications of Gravitational Trace Anomaly
General Relativity and Quantum Cosmology
2008-11-26 v3 Astrophysics
High Energy Physics - Theory
Abstract
We study the infrared effective theory of gravity that stems from the quantum trace anomaly. Quantum fluctuations of the metric induce running of the cosmological constant and the Newton constant at cosmological scales. By imposing the generalized Bianchi identity we obtain a prediction for the scale dependence of the dark matter and dark energy densities in terms of the parameters of the underlying conformal theory. For certain values of the model parameters the dark energy equation of state and the observed spectral index of the primordial density fluctuations can be simultaneously reproduced.
Cite
@article{arxiv.0707.3830,
title = {On Cosmological Implications of Gravitational Trace Anomaly},
author = {Neven Bilic and Branko Guberina and Raul Horvat and Hrvoje Nikolic and Hrvoje Stefancic},
journal= {arXiv preprint arXiv:0707.3830},
year = {2008}
}
Comments
11 pages, equation (4) corrected, discussions expanded, references added, results unchanged, to appear in PLB