Generalized Second Law in String Cosmology

TL;DR

This paper proposes a generalized second law in string cosmology that incorporates geometric and quantum entropy, preventing singularities and enabling a smooth transition from inflation by limiting curvature and dilaton energy.

Contribution

It introduces a new generalized second law in string cosmology that constrains cosmological evolution and avoids singularities.

Findings

Prevents singular string cosmologies under certain conditions.

Enforces a graceful exit from dilaton-driven inflation.

Bounds curvature and dilaton kinetic energy during evolution.

Abstract

A generalized second law in string cosmology accounts for geometric and quantum entropy in addition to ordinary sources of entropy. The proposed generalized second law forbids singular string cosmologies, under certain conditions, and forces a graceful exit transition from dilaton-driven inflation by bounding curvature and dilaton kinetic energy.