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Production of Information and Entropy in Measurement of Entangled States
Constantin V. Usenko
89 - 98
NATO Science for Peace and Security Series - D: Information and Communication Security
Volume 11: Quantum Communication and Security
Abstract

Problem of classification of the set of all entangled states is considered. Invariance of entangled states relative to the transformations from a group of symmetry of qubit space leads to classification of all states of the system through irreducible representations from that group. Excess of entropy the of a subsystem over the entropy of the whole system indicates the presence of entaglement in the system.

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