New insights in quantum geometry

TL;DR

This paper reviews recent advances in quantum geometry within loop quantum gravity, including new descriptions, operators, and applications to Chern-Simons theory and black holes.

Contribution

It introduces novel descriptions of quantum geometry using polyhedra, new volume operator results, and a method to include classical backgrounds in quantum models.

Findings

Polyhedral description of quantum geometry

New results on the volume operator

Application of exponentiated flux operators to Chern-Simons theory and black holes

Abstract

Quantum geometry, i.e., the quantum theory of intrinsic and extrinsic spatial geometry, is a cornerstone of loop quantum gravity. Recently, there have been many new ideas in this field, and I will review some of them. In particular, after a brief description of the main structures and results of quantum geometry, I review a new description of the quantized geometry in terms of polyhedra, new results on the volume operator, and a way to incorporate a classical background metric into the quantum description. Finally I describe a new type of exponentiated flux operator, and its application to Chern-Simons theory and black holes.