PHYSICAL INTERPRETATION OF OPTIMUM QUANTUM DETECTION OPERATORS

摘要

In this paper, it will be clarified why quantum detection theory may predict superior performance in comparison with semi-classical detection theory. The reason is based on the fact that in the quantum formulation the reduction of probabilities of the cross over regions among decision symbols is allowed by the quantum interference induced by quantum measurement processes. The superior performance for optimum and Kennedy's receivers is explained by the compression of probability amplitude of signal state by the projectors. Furthermore we show the general realization theorem of the optimum projectors.