How Not to Construct an Asymptotically de Sitter Universe

TL;DR

This paper explores the challenges of constructing a non-singular, holographically interpretable asymptotically de Sitter universe by adding matter to de Sitter space, highlighting significant difficulties and pitfalls.

Contribution

It provides a toy model analysis showing the inherent problems in creating a realistic, singularity-free, holographically consistent asymptotically de Sitter universe.

Findings

Adding matter leads to singularities and complicates holographic interpretation.

Constructing a non-singular, holographically consistent de Sitter universe is highly problematic.

The toy model illustrates key pitfalls in realistic universe modeling.

Abstract

Observational evidence suggests that our universe is currently evolving towards an asymptotically de Sitter future. Unfortunately and in spite of much recent attention, various quantum, holographic and cosmological aspects of de Sitter space remain quite enigmatic. With such intrigue in mind, this paper considers the ``construction'' of a toy model that describes an asymptotically de Sitter universe. More specifically, we add fluid-like matter to an otherwise purely de Sitter spacetime, formulate the relevant solutions and then discuss the cosmological and holographic implications. If the objective is to construct an asymptotically de Sitter universe that is free of singularities and has a straightforward holographic interpretation, then the results of this analysis are decidedly negative. Nonetheless, this toy model nicely illustrates the pitfalls that might be encountered in a more realistic type of construction.