A Minimal Model for Dilatonic Gravity

Details A Minimal Model for Dilatonic Gravity A Minimal Model for Dilatonic Gravity

1999-11-10

arxiv.org/abs/gr-qc/9911037v3

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages, LaTeX, no figures. A new Appendex added, new references, comments and acknowledgments added, typos corrected. Final

Scientific paper

10.1142/S0217732300002553

We study a new minimal scalar-tensor model of gravity with Brans-Dicke factor $\omega(\Phi)\equiv 0$ and cosmological factor $\Pi(\Phi)$. The constraints on $\Pi(\Phi)$ from known gravitational experiments are derived. We show that almost any time evolution of the scale factor in a homogeneous isotropic Universe can be obtained via properly chosen $\Pi(\Phi)$ and discuss the general properties of models of this type.

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