4.4 Article

Necessary and Sufficient Condition for Greenberger-Horne-Zeilinger Diagonal States to Be Full N-partite Entangled

Journal

INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
Volume 48, Issue 12, Pages 3358-3364

Publisher

SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10773-009-0139-2

Keywords

Entanglement; Quantum information theory

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We show that any N-qubit state which is diagonal in the Greenberger-Horne-Zeilinger basis is full N-qubit entangled state if and only if no partial transpose of the multiqubit state is positive with respect to any partition.

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