Background-free propagation in loop quantum gravity

TL;DR

This paper reviews the definition of n-point functions in loop quantum gravity, focusing on gauge issues and renormalization, highlighting current progress and open challenges in background-free quantum gravity propagation.

Contribution

It provides a comprehensive review of n-point functions in loop quantum gravity, emphasizing gauge and renormalization issues, and discusses open problems in background-free quantum gravity.

Findings

Clarified the definition of n-point functions in loop quantum gravity

Identified key open issues in gauge aspects and renormalization

Summarized current progress and challenges in background-free propagation

Abstract

I review the definition of n-point functions in loop quantum gravity, discussing what has been done and what are the main open issues. Particular attention is dedicated to gauge aspects and renormalization.