On the Sufficient Optimality Condition for Quantum Information Processing

Details On the Sufficient Optimality Condition for Quantum Information Processing On the Sufficient Optimality Condition for Quantum Information Processing

2005-11-04

arxiv.org/abs/quant-ph/0511043v1

Radio Eng. Electron. Phys., 19 (7), p. 39, 1974. [trans. from Radiotekhnika i Electronika, 1974, 19, 7, 1391--1395]

Physics

Quantum Physics

6 pages. An addition to quant-ph/0511042

Scientific paper

The necessary and sufficient conditions of optimality of the decoding of quantum signals minimizing the Bayesian risk are generalized for the Shannon mutual information criteria. It is shown that for a linear channel with Gaussian boson noise these conditions are satisfied by coherent quasi-measurement of the canonical annihilation amplitudes in the received superposition.

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