Characterization of multiqubit pure-state entanglement

Zeqian Chen; Quanhua Xu

doi:10.1103/PhysRevA.73.034306

Characterization of multiqubit pure-state entanglement

Zeqian Chen^*
, Quanhua Xu

^*Corresponding author for this work

CAS - Innovation Academy for Precision Measurement Science and Technology
CNRS

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

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.

Original language	English
Article number	034306
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	73
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevA.73.034306
State	Published - 2006
Externally published	Yes

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10.1103/PhysRevA.73.034306

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AB - 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.

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M3 - 文章

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JO - Physical Review A - Atomic, Molecular, and Optical Physics

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Characterization of multiqubit pure-state entanglement

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