Complete Entanglement Witness for Quantum Teleportation
Ming-Jing Zhao, Shao-Ming Fei, and Xianqing Li-Jost
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Submission date: 17. Aug. 2012
published in: Physical review / A, 85 (2012) 5, art-no. 054301
DOI number (of the published article): 10.1103/PhysRevA.85.054301
PACS-Numbers: 03.65.Ud, 03.67.Mn
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We propose a set of linear quantum entanglement witnesses constituted by local quantum-mechanical observables with each two possible measurement outcomes. These witnesses detect all the entangled resources which give rise to a better fidelity than separable states in quantum teleportation and present both sufficient and necessary conditions in experimentally detecting the useful resources for quantum teleportation.