Canonical Quantum Gravity and the Problem of Time

TL;DR

This paper reviews the problem of time in quantum gravity, discussing major approaches and providing a comprehensive overview based on lectures given at a summer school.

Contribution

It offers a detailed review of the main schemes addressing the problem of time in canonical quantum gravity, synthesizing existing approaches.

Findings

Summarizes key schemes for resolving the problem of time.

Highlights unresolved issues in quantum gravity.

Provides educational insights into quantum gravity challenges.

Abstract

This is the write-up of my lectures at the NATO Summer School held in Salamanca in June 1992. The paper deals with the problem of time in quantum gravity. All the major schemes are reviewed. Please note that the paper is in two parts for ease of email transmission; this is part 1. The mailer from gr-qc may further subdivide these two sections.