Decaying gravity

2006/03/31 by Timothy Clifton, T. Clifton, John D. Barrow · 5 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #astro-ph #gr-qc #hep-ph

paper · pdf · doi:10.1103/physrevd.73.104022

published as Phys.Rev.D73:104022,2006 · 13 pages

openalex publication_date 2006/05/17 · arxiv created 2006/05/18 · arxiv updated 2009/12/01 · openalex created_date 2020/07/02 · openalex updated_date 2026/08/04

Abstract

We consider the possibility of energy being exchanged between the scalar and matter fields in scalar-tensor theories of gravity. Such an exchange provides a new mechanism which can drive variations in the gravitational ``constant'' G. We find exact solutions for the evolution of spatially flat Friedmann-Robertson-Walker cosmologies in this scenario and discuss their behavior at both early and late times. We also consider the physical consequences and observational constraints on these models.

Citations

• Probing the Friedmann equation during recombination with future cosmic microwave background experiments
• Mach's Principle and a Relativistic Theory of Gravitation
• Large Mass Hierarchy from a Small Extra Dimension

Cited by

• Cosmologies with energy exchange
• Interacting New Generalized Chaplygin Gas
• Fixed points in interacting dark energy models
• Brans-Dicke scalar field as a chameleon
• ANOMALY INDUCED EFFECTIVE ACTION COMBINED WITH GENERALIZED BRANS–DICKE THEORY