A second-order phase transition in CDT

TL;DR

This paper provides evidence that Causal Dynamical Triangulations (CDT) exhibit a second-order phase transition, which could enable defining a continuum limit for quantum gravity within a lattice framework.

Contribution

The study demonstrates the existence of a second-order phase transition in CDT, advancing the understanding of its phase structure and potential for continuum quantum gravity.

Findings

Evidence of a second-order phase transition in CDT

Potential for defining a continuum limit in quantum gravity

Supports CDT as a viable nonperturbative approach

Abstract

Causal Dynamical Triangulations (CDT) are a concrete attempt to define a nonperturbative path integral for quantum gravity. We present strong evidence that the lattice theory has a second-order phase transition line, which can potentially be used to define a continuum limit in the conventional sense of nongravitational lattice theories.