Perturbative Quantum Gravity Induced Scalar Coupling to Electromagnetism

TL;DR

This paper demonstrates a fully perturbative mechanism by which quantum gravity can induce scalar couplings to electromagnetism of dimensions 5 and 6, providing calculable coefficients and challenging the belief that such effects are only non-perturbative.

Contribution

It introduces a perturbative method for deriving quantum gravity-induced scalar couplings to electromagnetism with explicit coefficients, contrary to prior assumptions.

Findings

Quantum gravity can induce scalar couplings perturbatively.

Calculated coefficients for dimension six couplings are explicitly provided.

Challenges the belief that such couplings are only non-perturbative effects.

Abstract

Physicists working on atom interferometers are interested in scalar couplings to electromagnetism of dimensions 5 and 6 which might be induced by quantum gravity. There is a widespread belief that such couplings can only be induced by conjectured non-perturbative effects, resulting in unknown coupling strengths. In this letter we exhibit a completely perturbative mechanism through which quantum gravity induces dimension six couplings with precisely calculable coefficients.