Higher Loop String Cosmology with Moduli and Antisymmetric Tensor Field

TL;DR

This paper explores the classical evolution of a homogeneous cosmological model in low-energy effective string gravity, incorporating higher genus corrections and analyzing various conformal frames to generalize known solutions.

Contribution

It introduces generalized cosmological solutions with higher genus corrections, extending previous tree-level models to include arbitrary curvature, dilaton, modulus, and Kalb-Ramond fields.

Findings

Derived new cosmological solutions with higher genus corrections.

Analyzed the effects of different conformal frames on solutions.

Extended known models to more general cases with arbitrary parameters.

Abstract

The classical evolution of a homogeneous cosmological model is investigated within the framework of low - energy effective string gravity with higher genus corrections. Various conformal frames are considered. For the general case of correction functions in the Lagrangian we give the cosmological solutions with arbitrary curvature and dilaton, modulus and Kalb-Ramond fields. They generalize previously known tree level solutions. The features of the solutions are discussed.