Recent results in CDT quantum gravity

TL;DR

This paper reviews recent advances in causal dynamical triangulation (CDT) quantum gravity, highlighting dimensional reduction phenomena, a new phase, and their implications for the asymptotic safety scenario.

Contribution

It provides an updated phase diagram of CDT, discusses a newly discovered phase, and explores their potential significance for quantum gravity theories.

Findings

Dimensional reduction observed at multiple points in CDT parameter space

Identification of a new phase with possible metric signature change

Discussion of implications for the asymptotic safety scenario

Abstract

We review some recent results from the causal dynamical triangulation (CDT) approach to quantum gravity. We review recent observations of dimensional reduction at a number of previously undetermined points in the parameter space of CDT, and discuss their possible relevance to the asymptotic safety scenario. We also present an updated phase diagram of CDT, discussing properties of a newly discovered phase and its possible relation to a signature change of the metric.