# Simplicial Gravity in Dimension Greater than Two

## TL;DR

This paper investigates the structure and simulation dynamics of higher-dimensional simplicial quantum gravity models, revealing dominant singular triangulations and supporting the first-order nature of the phase transition.

## Contribution

It demonstrates that in D>3, the triangulation space is dominated by singular configurations and analyzes the ergodicity of simulation algorithms near the phase transition.

## Key findings

- Triangulation space in D>3 is dominated by singular (D-3)-simplices.
- Simulation algorithms show no strong ergodicity breaking near the phase transition.
- The critical properties are influenced by the dynamics of singular vertices.

## Abstract

We consider two issues in the DT model of quantum gravity. First, it is shown that the triangulation space for D>3 is dominated by triangulations containing a single singular (D-3)-simplex composed of vertices with divergent dual volumes. Second we study the ergodicity of current simulation algorithms. Results from runs conducted close to the phase transition of the four-dimensional theory are shown. We see no strong indications of ergodicity br eaking in the simulation and our data support recent claims that the transition is most probably first order. Furthermore, we show that the critical properties of the system are determined by the dynamics of remnant singular vertices.