Inhomogeneous String Cosmology Solutions with Regular Spacetime Curvature

TL;DR

This paper presents a new class of inhomogeneous string cosmology solutions with regular spacetime curvature, highlighting the divergence of string coupling but avoiding singularities in curvature.

Contribution

It introduces a two-parameter family of analytic inhomogeneous solutions in low energy string cosmology without dilaton potential, with non-singular curvature.

Findings

Curvature remains non-singular in the solutions.

String coupling diverges exponentially.

Solutions are parametrized by two variables.

Abstract

In this work cosmological models are considered for the low energy string cosmological effective action (tree level) in the absence of dilaton potential. A two parametric non-diagonal family of analytic solutions is found. The curvature is non singular, however the string coupling diverges exponentially.