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Optomechanics-Based Quantum Estimation Theory for Collapse Models

Entropy 25, 500 (2023)

Marta Maria Marchese, Alessio Belenchia and Mauro Paternostro

We make use of the powerful formalism of quantum parameter estimation to assess the characteristic rates of a continuous spontaneous localization (CSL) model affecting the motion of a massive mechanical system. We show that a study performed in non-equilibrium conditions unveils the advantages provided by the use of genuinely quantum resources—such as quantum correlations—in estimating the CSL-induced diffusion rate. In stationary conditions, instead, the gap between quantum performance and a classical scheme disappears. Our investigation contributes to the ongoing effort aimed at identifying suitable conditions for the experimental assessment of collapse models.


Project manager
Irene Spagnul
Department of Physics
University of Trieste


Co-funded by the European Commission’s
Horizon Europe Programme under GA 101046973

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