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Entanglement of Three-Qubit Greenberger-Horne-Zeilinger-Symmetric States

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Eltschka, Christopher ; Siewert, Jens
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Date of publication of this fulltext: 24 Apr 2015 08:20


The first characterization of mixed-state entanglement was achieved for two-qubit states in Werner's seminal work [Phys. Rev. A 40, 4277 (1989)]. A physically important extension concerns mixtures of a pure entangled state [such as the Greenberger-Horne-Zeilinger (GHZ) state] and the unpolarized state. These mixed states serve as benchmark for the robustness of multipartite entanglement. They ...


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