Physics – Quantum Physics
Scientific paper
2011-10-14
Physics
Quantum Physics
5 pages
Scientific paper
We propose to detect quantum entanglement by a condition of local measurments. We find that this condition can detect efficiently the pure entangled states for both discrete and continuous variable systems. It does not depend on interference of decoherence from noise and detection loss in some systems, which allows a loophole-free test in real experiments. In particular, it is a necessary condition for the violation of some generalized Bell inequalities.
Ding Xiang-Mao
Fan Haifeng
Wu Xiaolin
Xie Qing
Yang Wen-Li
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