A consistent scalar-tensor cosmology for inflation, dark energy and the Hubble parameter

C. H T Wang*, J. A. Reid, Alexander Murphy, D. Rodrigues, M. Al Alawi, R. Bingham, J. T. Mendonça, T. B. Davies

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Pages (from-to)3761-3765
Number of pages5
JournalPhysics letters a
Volume380
Issue number45
DOIs
Publication statusPublished - 25 Nov 2016

Keywords

  • Cosmic inflation
  • Dark energy
  • Modified theories of gravity

Fingerprint

Dive into the research topics of 'A consistent scalar-tensor cosmology for inflation, dark energy and the Hubble parameter'. Together they form a unique fingerprint.

Cite this