Singularity Free (Homogeneous Isotropic) Universe in Graviton-Dilaton Models

TL;DR

This paper introduces graviton-dilaton models that describe a homogeneous isotropic universe evolving without singularities, offering a potential framework for singularity-free cosmology possibly rooted in string theory.

Contribution

The paper proposes a class of graviton-dilaton models that achieve a singularity-free evolution of the universe, expanding the scope of cosmological models compatible with string theory.

Findings

Models exhibit no singularity at any time

Potential connection to string theory frameworks

Provides a basis for further singularity-free cosmological studies

Abstract

We present a class of graviton-dilaton models in which a homogeneous isotropic universe, such as our observed one, evolves with no singularity at any time. Such models may stand on their own as interesting models for singularity free cosmology, and may be studied further accordingly. They may also arise from string theory. We discuss critically a few such possibilities.