Detecting the effects of quantum gravity with exceptional points in optomechanical sensors

TL;DR

This paper proposes using optomechanical sensors with exceptional points to detect quantum gravity effects, which are extremely weak and challenging to observe with traditional methods.

Contribution

It introduces a novel approach leveraging second- and third-order exceptional points in optomechanical systems to enhance sensitivity to quantum gravity effects.

Findings

Quantum gravity effects can be detected via exceptional points.

System sensitivity to mass deposition is affected by gravity perturbations.

Higher-order exceptional points further improve detection sensitivity.

Abstract

In this manuscript, working with a binary mechanical system, we examine the effect of quantum gravity on the exceptional points of the system. On the one side, we find that the exceedingly weak effect of quantum gravity can be sensed via pushing the system towards a second-order exceptional point, where the spectra of the non-Hermitian system exhibits non-analytic and even discontinuous behavior. On the other side, the gravity perturbation will affect the sensitivity of the system to deposition mass. In order to further enhance the sensitivity of the system to quantum gravity, we extend the system to the other one which has a higher-order (third-order) exceptional point. Our work provides a feasible way to use exceptional points as a new tool to explore the effect of quantum gravity.