期刊
PROBLEMS OF INFORMATION TRANSMISSION
卷 48, 期 1, 页码 1-10出版社
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0032946012010012
关键词
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资金
- Russian Foundation for Basic Research [09-01-00424]
- Russian Academy of Sciences
In this paper we consider the classical capacities of quantum-classical channels corresponding to measurement of observables. Special attention is paid to the case of continuous observables. We give formulas for unassisted and entanglement-assisted classical capacities C and C (ea) and consider some explicitly solvable cases, which give simple examples of entanglement-breaking channels with C < C (ea). We also elaborate on the ensemble-observable duality to show that C (ea) for the measurement channel is related to the chi-quantity for the dual ensemble in the same way as C is related to the accessible information. This provides both accessible information and the chi-quantity for quantum ensembles dual to our examples.
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