Dark Energy: the equation of state description versus scalar-tensor or modified gravity
High Energy Physics - Theory
2008-11-26 v3 Astrophysics
General Relativity and Quantum Cosmology
Abstract
Dark energy dynamics of the universe can be achieved by equivalent mathematical descriptions taking into account generalized fluid equations of state in General Relativity, scalar-tensor theories or modified F(R) gravity in Einstein or Jordan frames. The corresponding technique transforming equation of state description to scalar-tensor or modified gravity is explicitly presented. We show that such equivalent pictures can be discriminated by matching solutions with data capable of selecting the true physical frame.
Keywords
Cite
@article{arxiv.hep-th/0512118,
title = {Dark Energy: the equation of state description versus scalar-tensor or modified gravity},
author = {S. Capozziello and S. Nojiri and S. D. Odintsov},
journal= {arXiv preprint arXiv:hep-th/0512118},
year = {2008}
}
Comments
LaTeX file, 10 pages, 3 figures, the fit of two equivalent models with observational data is added, new references