چكيده به لاتين
Abstract: The manner in which states of some quantum systems become effectively
classical is of great significance for the foundations of quantum physics, as well as for
problems of practical interest such as building quantum gates or quantum computers. In
this study, we investigate the matrix trace inequality due to Ando, Hiai, Ando, and Okubo.
We introduce a skew information of Lieb’s type Sf,g(A, X) = T rf(A)Xg(A)X −
T rf(A)g(A)X2
for selfadjoint matrices A, X. We give conditions for f and g so that
Sf,g is positive or negative. As another important application, we settle the problem posed
by Yanagi, Furuichi and Kuriyama from quantum information theory..