Are There Any Real Problems With Quantum Gravity?

TL;DR

This paper introduces a Heisenberg picture approach to quantum gravity, explores its implications for superposed masses and fundamental concepts, and argues that many traditional problems are not genuine issues.

Contribution

It applies the Heisenberg picture and Schwinger action principle to quantum gravity, providing new insights and challenging traditional perceived problems.

Findings

Analysis of superposed masses interacting gravitationally

Discussion on the spin of the graviton and locality

Rebuttal of traditional problems in quantum gravity

Abstract

We present a short, general and accessible introduction to quantizing gravity in the Heisenberg picture. We then apply this formalism to the scenario where two spatially superposed masses interact through the gravitational field. We discuss some of the consequences for quantum gravity including the spin of the graviton, the notions of locality and causality, as well as going beyond the linear regime. We use the Schwinger action principle and the Heisenberg representation which we believe make the issues involved clearer. We conclude by commenting on a number of traditionally discussed apparent problems with quantizing gravity (only to, ultimately, deny their very existence).