Quantum entropy in terms of local quantum Bernoulli noises and related properties.

Localization of quantum Bernoulli noises (LQBNs) are the family of local annihilation and local creation operators acting on Bernoulli functionals. In this paper, we construct a density operator ρk represented by LQBNs, and define a new quantum entropy S (ρ k) based on LQBNs. Furthermore, we demonstrate that this quantum entropy S (ρ k) also has the basic properties of von Neumann entropy, such as concavity, subadditivity, and nonnegativity. In particular, we obtain the necessary and sufficient condition for S (ρ k) = k. [ABSTRACT FROM AUTHOR]