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Article Dans Une Revue Physical Review A : Atomic, molecular, and optical physics [1990-2015] Année : 2006

Characterization of multiqubit pure-state entanglement

Résumé

A necessary and sufficient entanglement criterion based on variances of Mermin-Klyshko's Bell operators is proved for multiqubit pure states. Contrary to Bell's inequalities, entangled pure states strictly satisfy a quadratic inequality but product ones can attain the equality under some local unitary transformations, which can be obtained by solving a quadratic maximum problem. This presents a characterization of multiqubit pure-state entanglement.

Dates et versions

hal-00477055 , version 1 (27-04-2010)

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Zeqian Chen, Quanhua Xu. Characterization of multiqubit pure-state entanglement. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2006, 73(034306), pp.1-3. ⟨hal-00477055⟩
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