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- W4386444546 abstract "Quantum Darwinism offers an explanation for the emergence of classical objective features (those we are used to at macroscopic scales) from quantum properties at the microscopic level. The interaction of a quantum system with its surroundings redundantly proliferates information to many parts of the environment, turning it accessible and objective to different observers. However, given that one cannot probe the quantum system directly, only its environment, how to determine whether an unknown quantum property can be deemed objective? Here we propose a probabilistic framework to analyze this question and show that objectivity implies a Bell-like inequality. Among several other results, we show quantum violations of this inequality, a device-independent proof of the nonobjectivity of quantum correlations. We also implement a photonic experiment where the temporal degree of freedom of photons is the quantum system of interest, while their polarization acts as the environment. Employing a fully black-box approach, we achieve the violation of a Bell-like inequality, thus certifying the nonobjectivity of the underlying quantum dynamics in a fully device-independent framework." @default.
- W4386444546 created "2023-09-06" @default.
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- W4386444546 date "2023-09-05" @default.
- W4386444546 modified "2023-10-17" @default.
- W4386444546 title "Device-independent witness for the nonobjectivity of quantum dynamics" @default.
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- W4386444546 doi "https://doi.org/10.1103/physreva.108.032201" @default.
- W4386444546 hasPublicationYear "2023" @default.
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