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arXiv · 2607.18351

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

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
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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.

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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. 2026-07-20. Probing gravitational interaction between milligram optomechanical oscillators operating in the quantum regime. https://arxiv.org/abs/2607.18351

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