8 research outputs found
On the Sufficient Optimality Condition for Quantum Information Processing
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.Comment: 6 pages. An addition to quant-ph/051104