Punctuated eternal inflation via AdS/CFT

TL;DR

This paper models a scenario of eternal inflation using AdS/CFT duality, representing de Sitter bubbles within black hole spacetimes to address cosmological issues and interpret de Sitter entropy.

Contribution

It introduces a novel AdS/CFT-based framework for modeling eternal inflation with de Sitter bubbles and provides insights into cosmological initial conditions and entropy interpretation.

Findings

Characterization of dual CFT states for de Sitter bubbles

Resolution of key paradoxes in eternal inflation

Interpretation of de Sitter entropy via black hole microstates

Abstract

The work is an attempt to model a scenario of inflation in the framework of Anti de Sit- ter/Conformal Field theory (AdS/CFT) duality, a potentially complete nonperturbative description of quantum gravity via string theory. We look at bubble geometries with de Sitter interiors within an ambient Schwarzschild anti-de Sitter black hole spacetime and obtain a characterization for the states in the dual CFT on boundary of the asymptotic AdS which code the expanding dS bubble. These can then in turn be used to specify initial conditions for cosmology. Our scenario naturally interprets the entropy of de Sitter space as a (logarithm of) subspace of states of the black hole microstates. Consistency checks are performed and a number of implications regarding cosmology are discussed including how the key problems or paradoxes of conventional eternal inflation are overcome.