Remarks on the classical capacity of quantum channel
classification
🪐 quant-ph
keywords
capacityclassicalchannelscovariantproofquantumchanneldescribed
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A direct proof of the relation between the one-shot classical capacity and the minimal output entropy for covariant quantum channels is suggested. The structure of covariant channels is described in some detail. A simple proof of a general inequality for entanglement-assisted classical capacity is given.
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