Genuine multipartite nonlocality of entangled thermal states

Journal Article · Sun Aug 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.022315· OSTI ID:21448462

McKeown, G; Paternostro, M ^[1]; Semiao, F L ^[2]; Jeong, H ^[3]

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1. School of Mathematics and Physics, The Queen's University, Belfast BT7 1NN (United Kingdom)
2. Departamento de Fisica, Universidade Estadual de Ponta Grossa-Campus Uvaranas, 84030-900 Ponta Grossa, Parana (Brazil)
3. Department of Physics and Astronomy, Seoul National University, Seoul 151-742 (Korea, Republic of)

We assess quantum nonlocality of multiparty entangled thermal states by studying, quantitatively, both tripartite and quadripartite states belonging to the Greenberger-Horne-Zeilinger, W, and linear cluster-state classes and showing violation of relevant Bell-like inequalities. We discuss the conditions for maximizing the degree of violation against the local thermal character of the states and the inefficiency of the detection apparatuses. We demonstrate that such classes of multipartite entangled states can be made to last quite significantly, notwithstanding adverse operating conditions. This opens up the possibility for coherent exploitation of multipartite quantum channels made out of entangled thermal states. Our study is accompanied by a detailed description of possible generation schemes for the states analyzed.

• OSTI ID: 21448462
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BELL THEOREM
DETECTION
LOCALITY
MECHANICS
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS
QUANTUM STATES