Testing quantum entanglement with contextuality
Qing Xie, Xingyao Wu, Xing Ding, Wen-Qiang Yang, R. H. Yue, Heng Fan · arXiv (Cornell University) · 2011
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.