Chin. Phys. Lett.  2012, Vol. 29 Issue (7): 070306    DOI: 10.1088/0256-307X/29/7/070306
GENERAL |
Testing Quantum Entanglement with Local Measurement
XIE Qing1,2, WU Xian-Xin2, DING Xiang-Mao3, YANG Wen-Li4, YUE Rui-Hong1, FAN Heng2**
1Faculty of Science, Ningbo University, Ningbo 315211
2Institute of Physics, Chinese Academy of Sciences, Beijing 100190
3Institute of Applied Mathematics, Academy of Mathematics and System Science, Chinese Academy of Sciences, Beijing 100190
4Institute of Modern Physics, Northwest University, Xi'an 710069
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XIE Qing, WU Xian-Xin, DING Xiang-Mao et al  2012 Chin. Phys. Lett. 29 070306
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Abstract We propose to detect quantum entanglement by a condition of local measurements. We find that this condition can efficiently detect 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.
Received: 19 April 2012      Published: 29 July 2012
PACS:  03.65.Ud (Entanglement and quantum nonlocality)  
  03.65.Ta (Foundations of quantum mechanics; measurement theory)  
  42.50.Dv (Quantum state engineering and measurements)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/29/7/070306       OR      https://cpl.iphy.ac.cn/Y2012/V29/I7/070306
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XIE Qing
WU Xian-Xin
DING Xiang-Mao
YANG Wen-Li
YUE Rui-Hong
FAN Heng
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