Optomechanics-based quantum estimation theory for collapse models

Marta Maria Marchese, Alessio Belenchia, Mauro Paternostro

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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.
Original languageEnglish
Article number500
Issue number3
Publication statusPublished - 14 Mar 2023


  • General Physics and Astronomy


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