Indications of de Sitter Spacetime from Classical Sequential Growth Dynamics of Causal Sets

TL;DR

This paper shows that classical sequential growth dynamics of causal sets can produce a cyclic universe with an initial de Sitter-like exponential expansion, offering a novel approach to early universe modeling without fine tuning.

Contribution

It demonstrates that causal set dynamics naturally lead to de Sitter-like expansion phases, providing a new classical foundation for early universe cosmology.

Findings

Evidence of de Sitter-like exponential expansion in causal set models

Causal set dynamics produce cyclic universe with origin elements

Potential to address standard cosmological puzzles without fine tuning

Abstract

A large class of the dynamical laws for causal sets described by a classical process of sequential growth yield a cyclic universe, whose cycles of expansion and contraction are punctuated by single `origin elements' of the causal set. We present evidence that the effective dynamics of the immediate future of one of these origin elements, within the context of the sequential growth dynamics, yields an initial period of de Sitter like exponential expansion, and argue that the resulting picture has many attractive features as a model of the early universe, with the potential to solve some of the standard model puzzles without any fine tuning.