The theory of quantum information, that is, of the transmission, storage, and processing of information using quantum-mechanical systems, is now well developed. It has been constructed largely by the generalization to this context of elements of traditional information theory, which have been designed to explain the transmission, storage, and processing information using classical means. The mathematical description of quantum systems differs fundamentally from that of classical states, as we saw in Chapter 1.1 This difference lends quantum information a significantly different character from that of classical information.
KeywordsQuantum Entropy Tsallis Entropy Strong Subadditivity Quantum Mutual Information Coherent Information
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