Gravitational Effects in Quantum Mechanics

TL;DR

This paper reviews the motivations and recent experimental proposals for exploring the intersection of quantum mechanics and general relativity, emphasizing the potential for new physical insights at the Planck scale.

Contribution

It provides a comprehensive overview of semi-classical motivations and upcoming experimental efforts to test gravitational effects in quantum regimes.

Findings

Discussion of semi-classical arguments for new effects

Overview of experimental proposals for Planck-scale physics

Analysis of the necessity to quantize gravity

Abstract

To date, both quantum theory, and Einstein's theory of general relativity have passed every experimental test in their respective regimes. Nevertheless, almost since their inception, there has been debate surrounding whether they should be unified and by now there exists strong theoretical arguments pointing to the necessity of quantising the gravitational field. In recent years, a number of experiments have been proposed which, if successful, should give insight into features at the Planck scale. Here we review some of the motivations, from the perspective of semi-classical arguments, to expect new physical effects at the overlap of quantum theory and general relativity. We conclude with a short introduction to some of the proposals being made to facilitate empirical verification.