Experimental Determination of Entanglement for Arbitrary Pure States
Shao-Ming Fei, Ming-Jing Zhao, Kai Chen,and Zhi-Xi Wang
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Submission date: 17. Aug. 2009
published in: Physical review / A, 80 (2009) 3, art-no. 032320
DOI number (of the published article): 10.1103/PhysRevA.80.032320
PACS-Numbers: 03.65.Ud, 03.67.Mn, 42.50.-p
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We present a way of experimental determination of concurrence in terms of the expectation value of local observables for arbitrary multipartite pure states. In stead of joint measurements on two-copy states needed in the experiment [Nature 440, 20(2006)] for two-qubit systems, we need only measurements on one-copy state in every single measurement for any arbitrary dimensional multipartite states, which avoids the preparation of twin states or the imperfect copy of pure states.