Abstract
The entropy and the mutual entropy for states and channels are totally studied in general quantum systems described byC*-algebras. In particular, we discuss the relations among theS-entropy and the mutual entropy introduced by Ohya and the Connes-Narnhofer-Thirring entropy.
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Muraki, N., Ohya, M. & Petz, D. Entropies of general quantum states. Open Syst Inf Dyn 1, 43–56 (1992). https://doi.org/10.1007/BF02228935
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DOI: https://doi.org/10.1007/BF02228935