Local content of bipartite qubit correlations

Journal Article · Mon Feb 15 00:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.022103· OSTI ID:21413252

Branciard, Cyril; Gisin, Nicolas ^[1]; Scarani, Valerio ^[2]

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1. Group of Applied Physics, University of Geneva, 1211 Geneva (Switzerland)
2. Centre for Quantum Technologies and Department of Physics, National University of Singapore, 117543 Singapore (Singapore)

One of the last open problems concerning two qubits in a pure state is to find the exact local content of their correlation, in the sense of Elitzur, Popescu, and Rohrlich (EPR2) [A. C. Elitzur, S. Popescu, and D. Rohrlich, Phys. Lett. A162, 25 (1992)]. We propose an EPR2 decomposition that allows us to prove, for a wide range of states |{psi}({theta})>=cos{theta}|00>+sin{theta}|11>, that their local content is p{sub L}({theta})=cos2{theta}. We also share reflections on how to possibly extend this result to all two-qubit pure states.

• OSTI ID: 21413252
• Journal Information: Physical Review. A, Vol. 81, Issue 2; Other Information: DOI: 10.1103/PhysRevA.81.022103; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CORRELATIONS
DECOMPOSITION
QUBITS
REFLECTION
CHEMICAL REACTIONS
INFORMATION
QUANTUM INFORMATION