A consistent scalar-tensor cosmology for inflation, dark energy and the Hubble parameter
General Relativity and Quantum Cosmology
2016-10-05 v3 Cosmology and Nongalactic Astrophysics
Abstract
A Friedman cosmology is investigated based on scalar-tensor gravitation with general metric coupling and scalar potential functions. We show that for a broad class of such functions, the scalar field can be dynamically trapped using a recently suggested mechanism. The trapped scalar can drive inflation and accelerated cosmic expansion, compatible with standard requirements. The inflationary phase admits a natural exit with a value of the Hubble parameter dictated by the duration of inflation in a parameter independent manner. For inflationary duration consistent with the GUT description, the resulting Hubble parameter is found to be consistent with its observed value.
Cite
@article{arxiv.1309.4066,
title = {A consistent scalar-tensor cosmology for inflation, dark energy and the Hubble parameter},
author = {C. H. -T. Wang and J. A. Reid and A. St J. Murphy and D. Rodrigues and M. Al Alawi and R. Bingham and J. T. Mendonca and T. B. Davies},
journal= {arXiv preprint arXiv:1309.4066},
year = {2016}
}
Comments
6 pages; version accepted by PLA