Information capacity of quantum observable

Details Information capacity of quantum observable Information capacity of quantum observable

2011-03-14

arxiv.org/abs/1103.2615v3

Problems of Information Transmission, vol. 48 (2012), 1-10

Physics

Quantum Physics

13 pages. New section and references are added concerning the ensemble-observable duality

Scientific paper

10.1134/S0032946012010012

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 the formulas for unassisted and entanglement-assisted classical capacities $C,C_{ea}$ and consider some explicitly solvable cases which give simple examples of entanglement-breaking channels with $C

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