Probing gravitational interaction between milligram optomechanical oscillators operating in the quantum regime

Authors:M. Bonaldi, A. Borrielli, G. Di Giuseppe, N. Malossi, F. Marin, F. Marino, F. Marzioni, R. Natali, G. Novelli, P. Piergentili, A. Pontin, P. Sberna, E. Serra, G. Sordo, D. Vitali

Abstract:We present an ongoing optomechanical experiment aimed at detecting gravitational interaction between milligram-scale oscillators, and exploring its interplay with quantum mechanics. The setup employs two microfabricated oscillators coupled via gravity and read out through a high-finesse optical cavity, at ultra-cryogenic temperature. Finite element simulations, noise modelling, and sensitivity estimates demonstrate that gravitational coupling can be detected with integration times ranging from minutes to hours. The experiment establishes a realistic platform for probing gravitational effects in systems approaching the quantum regime.

arXiv:2607.18351 [quant-ph]

(or arXiv:2607.18351v1 [quant-ph] for this version)

https://doi.org/10.48550/arXiv.2607.18351 arXiv-issued DOI via DataCite (pending registration)