Nonadditive generalization of the quantum Kullback-Leibler divergence for measuring the degree of purification
Nonadditive generalization of the quantum Kullback-Leibler divergence for measuring the degree of purification
The Kullback-Leibler divergence offers an information-theoretic basis for measuring the difference between two given distributions. Its quantum analog, however, fails to play a corresponding role for comparing two density matrices, if the reference states are pure states. Here it is shown that nonadditive quantum information theory inspired by nonextensive statistical …