Singularity-free cosmological solutions of the superstring effective action

TL;DR

This paper explores cosmological solutions derived from the superstring effective action that avoid initial singularities, incorporating one-loop corrections and scalar fields within a Friedmann-Robertson-Walker universe.

Contribution

It presents a new class of singularity-free cosmological solutions consistent with perturbative superstring theory, considering dilaton and modulus fields.

Findings

Identified solutions avoiding initial singularities.

Solutions are consistent with perturbative superstring corrections.

Demonstrated stability within the effective action framework.

Abstract

We study the cosmological solutions of the one loop corrected superstring effective action, in a Friedmann-Robertson-Walker background, and in the presence of the dilaton and modulus fields. A particularly interesting class of solutions is found which avoid the initial singularity and are consistent with the perturbative treatment of the effective action.