Physical Information Theory Part Ii: Quantum Systems
Lev B. Levitin · 2005
The concept of information (by Shannon) is generalized for quantum statistical ensembles, and the consistent quantum-theoretical form of the entropy defect principle is obtained. The efect of the irreversiblility of quantummechanical measurements on information transmission is analyzed. For the ensemble of two pure quantum states, the optimal measurement procedure is found in the explicit form.