Quantum superpositions and the measurement problem

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The measurement problem is addressed from the viewpoint that it is the distinguishability between the state preparation and its quantum ensemble, i.e. the set of states with which it has a non-zero overlap, that is at the heart of the difference between classical and quantum measurements. The measure for the degree of distinguishability between pairs of quantum states, i.e. the quantum fidelity, is for this purpose generalized, by the application of the superposition principle, to the setting where there exists an arbitrary-dimensional quantum ensemble.
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First archival date: 2021-03-19
Latest version: 14 (2021-04-12)
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