Detecting deformed commutators with exceptional points in optomechanical sensors. (21st December 2021)

• Record Type: Journal Article
• Authors: Cui, Dianzhen; Li, T; Li, Jianning; Yi, Xuexi
• Is Part Of: New journal of physics. Volume 23:Number 12(2021)
• Publication Date: 2021-12-21
• Subjects: quantum gravity -- exceptional points -- generalized uncertainty principle -- sensitivity; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/ac3ff7
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: Models of quantum gravity imply a modification of the canonical position-momentum commutation relations. In this paper, 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 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.