Separable and entangled states of composite quantum systems; Rigorous description

Details Separable and entangled states of composite quantum systems; Rigorous description Separable and entangled states of composite quantum systems; Rigorous description

1997-11-21

arxiv.org/abs/quant-ph/9711051v1

Physics

Quantum Physics

latex with revtex

Scientific paper

We present a general description of separable states in Quantum Mechanics. In particular, our result gives an easy proof that inseparabitity (or entanglement) is a pure quantum (noncommutative) notion. This implies that distinction between separability and inseparabitity has sense only for composite systems consisting of pure quantum subsystems. Moreover, we provide the unified characterization of pure-state entanglement and mixed-state entanglement.

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