In search of lost spacetime: philosophical issues arising in quantum gravity

TL;DR

This paper introduces the philosophical challenges encountered in developing a quantum theory of gravity, focusing on loop quantum gravity as a case study of the conceptual issues at the intersection of spacetime and quantum physics.

Contribution

It provides an accessible overview of the philosophical questions and motivations behind pursuing a quantum theory of gravity, emphasizing loop quantum gravity.

Findings

Highlights philosophical issues in quantum gravity

Explores conceptual challenges of combining spacetime and quantum physics

Uses loop quantum gravity as an illustrative example

Abstract

This essay presents an accessible introduction to the basic motivations to seek a quantum theory of gravity. It focuses on one approach- loop quantum gravity - as an example of the rich philosophical issues that arise when we try to combine spacetime and quantum physics.