Optimal Quantum Measurements for Two Pure and Mixed States
作者： L. B. Levitin
DOI: 10.1007/978-1-4899-1391-3_43
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摘要: An explicit formula is obtained for the entropy defect and (maximum) information an ensemble of two pure quantum states; optimal basis found, that is, measurement procedure which enables one to obtain maximum information. Some results are also presented case mixed states, described by second-order density matrices (for example, spin polarization matrices). It shown in states a direct von Neumann performed subspace states.
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