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- W1991505511 abstract "A short and elementary proof of the joint convexity of relative entropy is presented, using nothing beyond linear algebra. The key ingredients are an easily verified integral representation and the strategy used to prove the Cauchy-Schwarz inequality in elementary courses. Several consequences are proved in a way which allow an elementary proof of strong subadditivity in a few more lines. Some expository material on Schwarz inequalities for operators and the Holevo bound for partial measurements is also included." @default.
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- W1991505511 date "2007-08-01" @default.
- W1991505511 modified "2023-10-16" @default.
- W1991505511 title "Another short and elementary proof of strong subadditivity of quantum entropy" @default.
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- W1991505511 doi "https://doi.org/10.1016/s0034-4877(07)00019-5" @default.
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