Inflationary universe from higher-derivative quantum gravity
General Relativity and Quantum Cosmology
2015-09-21 v3 Cosmology and Nongalactic Astrophysics
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
We consider higher-derivative quantum gravity where renormalization group improved effective action beyond one-loop approximation is derived. Using this effective action, the quantum-corrected FRW equations are analyzed. De Sitter universe solution is found. It is demonstrated that such de Sitter inflationary universe is instable. The slow-roll inflationary parameters are calculated. The contribution of renormalization group improved Gauss-Bonnet term to quantum-corrected FRW equations as well as to instability of de Sitter universe is estimated. It is demonstrated that in this case the spectral index and tensor-to-scalar ratio are consistent with Planck data.
Cite
@article{arxiv.1412.1073,
title = {Inflationary universe from higher-derivative quantum gravity},
author = {Ratbay Myrzakulov and Sergei Odintsov and Lorenzo Sebastiani},
journal= {arXiv preprint arXiv:1412.1073},
year = {2015}
}
Comments
final version, 17 pages, accepted in Phys. Rev. D