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- W4378716023 abstract "Abstract By using the recently introduced parametrization of an n -dimensional density matrix in terms of the indices of population asymmetry and the intrinsic coherences, we define descriptors in both integer and continuous forms of the effective dimension that take place for a complete description of a density matrix, thus providing accurate information beyond the rank of the density matrix. The concepts of dimensional folding, hidden dimensional purity, and dimensional entropy are introduced and discussed in view of the new approach presented. The results are applicable to any physical system represented by a density matrix, such as n -level quantum systems, qutrits, sets of interacting pencils of radiation, classical polarization states, and to transformations of density matrices, as occurs with quantum channels." @default.
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- W4378716023 date "2023-05-29" @default.
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- W4378716023 title "Descriptors of dimensionality for n × n density matrices" @default.
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- W4378716023 doi "https://doi.org/10.1140/epjp/s13360-023-04109-8" @default.
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