De Sitter Holography and the Cosmic Microwave Background

TL;DR

This paper explores how the evolution of the universe, including inflation and dark energy, can be understood through holographic duality, linking cosmological phenomena to a dual Euclidean field theory and its renormalisation group flow.

Contribution

It provides a holographic interpretation of cosmological evolution, connecting inflation and dark energy to a dual field theory framework, and discusses implications for fine-tuning problems.

Findings

Cosmic microwave background spectrum linked to field theory scaling violations

Holographic perspective offers insights into cosmological fine-tuning issues

Inflation modeled as perturbations around a dual field theory fixed point

Abstract

We interpret cosmological evolution holographically as a renormalisation group flow in a dual Euclidean field theory, as suggested by the conjectured dS/CFT correspondence. Inflation is described by perturbing around the infra-red fixed point of the dual field theory. The spectrum of the cosmic microwave background radiation is determined in terms of scaling violations in the field theory. The dark energy allows similar, albeit less predictive, considerations. We discuss the cosmological fine-tuning problems from the holographic perspective.