. . "In quantum mechanics, and especially quantum information and the study of open quantum systems, the trace distance T is a metric on the space of density matrices and gives a measure of the distinguishability between two states. It is the quantum generalization of the Kolmogorov distance for classical probability distributions."@en . . . . . . . . . . . "In quantum mechanics, and especially quantum information and the study of open quantum systems, the trace distance T is a metric on the space of density matrices and gives a measure of the distinguishability between two states. It is the quantum generalization of the Kolmogorov distance for classical probability distributions."@en . . . . . "5494"^^ . . . . . . . . "28096792"^^ . . . . . . . . "Trace distance"@en . . "1101075724"^^ .