On String Cosmology and de Sitter inflation with massless dilatons and dynamical torsion

TL;DR

This paper explores string cosmology with massless dilatons and dynamical torsion, deriving torsion expressions during de Sitter inflation and approximating solutions based on COBE data.

Contribution

It introduces a novel relation between torsion and dilatons in string cosmology during inflation, with solutions aligned to observational data.

Findings

Derived torsion expressions in terms of dilatons during inflation

Provided approximate solutions consistent with COBE data

Enhanced understanding of torsion's role in string cosmology

Abstract

Variation of the 4-D string cosmology action with dynamical torsion and massless dilatons lead to an expression of torsion in terms of massless dilatons in the case of de Sitter inflation.The solution is approximated according to the COBE data.