Global entanglement for multipartite quantum states

Journal Article · Wed Feb 15 04:00:00 EST 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.73.022325· OSTI ID:20974541

Changshui, Yu; Heshan, Song ^[1]

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1. Department of Physics, Dalian University of Technology, Dalian 116024 (China)

Based on the residual entanglement [Phys. Rev. A 71, 042331 (2005)], we present the global entanglement for a multipartite quantum state. The measure is shown to be also obtained by the bipartite partitions of the multipartite state. The distinct characteristic of the global entanglement is that it consists of the sum of different entanglement contributions. The measure can provide sufficient and necessary condition of fully separability for pure states and be conveniently extended to mixed states by minimizing the convex hull. To test the sufficiency of the measure for mixed states, we evaluate the global entanglement of bound entangled states. The properties of the measure discussed finally show the global entanglement is an entanglement monotone.

• OSTI ID: 20974541
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 73; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOUND STATE
INFORMATION THEORY
MIXED STATE
QUANTUM ENTANGLEMENT
QUANTUM INFORMATION
QUANTUM MECHANICS