# Phase structure of Causal Dynamical Triangulations in 4D

## TL;DR

This paper explores the phase structure of 4D Causal Dynamical Triangulations, revealing multiple phases including a semiclassical phase aligned with general relativity and a newly discovered phase with unique geometric features.

## Contribution

It provides new insights into the phase diagram of CDT, including the identification of a novel phase and associated higher-order phase transitions.

## Key findings

- Identification of a new phase with unique geometric properties
- Existence of second or higher order phase transitions
- Semiclassical phase consistent with Einstein's general relativity

## Abstract

Causal Dynamical Triangulations (CDT) is a lattice approach to quantum gravity. CDT has rich phase structure, including a semiclassical phase consistent with Einstein's general relativity. Some of the observed phase transitions are second (or higher) order which opens a possibility of investigating the ultraviolet continuum limit. Recently a new phase with intriguing geometric properties has been discovered and the new phase transition is also second (or higher) order.