Exploring the new phase transition of CDT

TL;DR

This paper investigates a newly discovered phase transition in Causal Dynamical Triangulations (CDT) quantum gravity, analyzing order parameters to determine the nature of the transition and its implications for the continuum limit.

Contribution

It introduces new order parameters and provides evidence that the bifurcation phase transition in CDT is likely second or higher order, impacting the understanding of quantum gravity.

Findings

Transition is likely second or higher order

Order parameters effectively distinguish phases

Implications for continuum limit of CDT

Abstract

This work focuses on the newly discovered bifurcation phase transition of CDT quantum gravity. We define various order parameters and investigate which is most suitable to study this transition in numerical simulations. By analyzing the behaviour of the order parameters we present evidence that the transition separating the bifurcation phase and the physical phase of CDT is likely a second or higher-order transition, a result that may have important implications for the continuum limit of CDT.