Discrete Quantum Mechanics I: Quantum Covariance

TL;DR

This paper re-examines the concept of covariance in quantum mechanics, proposing a new quantum covariance condition that could unify general relativity with quantum mechanics for non-interacting particles.

Contribution

It introduces the concept of quantum covariance within the Dirac-Von Neumann framework, replacing classical covariance to aid in unifying gravity and quantum theory.

Findings

Quantum covariance replaces classical covariance in quantum mechanics.

Quantum covariance is essential for unifying general relativity with quantum mechanics.

The new condition applies to non-interacting particles.

Abstract

Classically general covariance is found from the idea that a vector is a physical quantity which exists independently of choice of coordinate system and is unchanged by a change of coordinate system. It is often assumed that there exists some form of absolute mathematical space or space-time, and that in a flat space approximation vectors can be imagined between defined points in this space-time, much as we can imagine an arrowed line drawn on a piece of paper. However, while classical vector quantities can be represented on paper, in the quantum domain physical quantities do not in general exist with precise values except in measurement; a change of apparatus, for example by rotating it, may affect the outcome of the measurement, so the condition for general covariance does not apply. The purpose of this paper is to re-examine covariance within the context of an orthodox, Dirac-Von Neumann interpretation of quantum mechanics, to replace it with a new condition, here called quantum covariance, and to show that quantum covariance is the required condition for the unification of general relativity with quantum mechanics for non-interacting particles.