Ming-Jing Zhao, Shao-Ming Fei, Xianqing Li-Jost
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.
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http://arxiv.org/abs/1205.0771
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