Comments on cosmological RG flows

TL;DR

This paper explores cosmological backgrounds through the lens of the dS/CFT correspondence and RG flows, analyzing scalar-driven inflation, accelerated expansion, and potential string theory embeddings.

Contribution

It extends the dS/CFT framework to cosmological models with scalar fields, connecting RG flows, inflation, and string theory scenarios.

Findings

Scalar fields can drive inflation and late-time acceleration.

Connections between cosmological RG flows and AdS/CFT are discussed.

Tentative embedding of scalar-driven cosmology in string theory.

Abstract

We study cosmological backgrounds from the point of view of the dS/CFT correspondence and its renormalization group flow extension. We focus on the case where gravity is coupled to a single scalar with a potential. Depending on the latter, the scalar can drive both inflation and the accelerated expansion (dS) phase in the far future. We also comment on quintessence scenarios, and flows familiar from the AdS/CFT correspondence. We finally make a tentative embedding of this discussion in string theory where the scalar is the dilaton and the potential is generated at the perturbative level.