A Minimal Model for Dilatonic Gravity

TL;DR

This paper introduces a minimal scalar-tensor gravity model with a specific Brans-Dicke factor and explores how the cosmological factor can be tuned to match various universe evolutions, constrained by experiments.

Contribution

It presents a new minimal scalar-tensor gravity model with a fixed Brans-Dicke factor and analyzes the flexibility of the cosmological factor in reproducing different cosmological evolutions.

Findings

Constraints on the cosmological factor from gravitational experiments.

Almost any scale factor evolution can be modeled with appropriate al.

Discussion of general properties of such models.

Abstract

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.