COMPUTATION OF MUTUAL ENTROPY IN QUANTUM AMPLIFIER PROCESSES

摘要

The mathematical concept "lifting" which stems from "compound state" and "transition expectation" could have been applied to optical communication processes and quantum Markov chains. In the latest study of lifting for the optical communication processes it was succesful to rigorously derive the error probability and SNR for quantum amplifier processes.rnIn this paper the mutual entropy for quantum amplifier processes which is one of the most important efficiencies concerning the channel capacity is rigorously derived from the concept of "lifting" and its computational results of the mutual entropy are discussed.