Universality of 2d causal dynamical triangulations

TL;DR

This paper discusses how two-dimensional Causal Dynamical Triangulations (CDT) provides a universal and analytically solvable approach to non-perturbative quantum gravity, independent of lattice details.

Contribution

It demonstrates the universality of the continuum limit in 2D CDT, confirming its robustness as a regularization of quantum gravity.

Findings

Continuum limit in 2D CDT is universal

Analytical solution available for 2D lattice theory

Results support CDT as a viable non-perturbative quantum gravity approach

Abstract

The formalism of Causal Dynamical Triangulations (CDT) attempts to provide a non-perturbative regularization of quantum gravity, viewed as an ordinary quantum field theory. In two dimensions one can solve the lattice theory analytically and the continuum limit is universal, not depending on the details of the lattice regularization.