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- W4295698817 abstract "We find a criterion to compare POVM measurements and decide which ones can extract more information from physical systems, with coarser POVMs always extracting less information. This criteria generalizes the previous definition of coarser POVM, and is motivated by the idea that information cannot be gained by processing the measurement outcomes. The information that a measurement cannot extract is quantified by observational entropy or coarse-grained entropy. Adequately, coarser measurements have larger observational entropies. Moreover, the characterization and properties of coarser measurements that we provide allow to straightforwardly derive several previously known results about observational entropy." @default.
- W4295698817 created "2022-09-14" @default.
- W4295698817 creator A5007697349 @default.
- W4295698817 date "2022-09-09" @default.
- W4295698817 modified "2023-09-28" @default.
- W4295698817 title "Data processing makes POVMs coarser and observational entropies larger" @default.
- W4295698817 doi "https://doi.org/10.48550/arxiv.2209.04549" @default.
- W4295698817 hasPublicationYear "2022" @default.
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