Maximal violation of Clauser-Horne-Shimony-Holt inequality for four-level systems

Journal Article · Mon Mar 01 00:00:00 EST 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.69.034305· OSTI ID:20640913

Libin, Fu ^[1]; Jingling, Chen ^[2]; Shigang, Chen ^[1]

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1. Institute of Applied Physics and Computational Mathematics, P.O. Box 8009 (28), 100088 Beijing (China)
2. Department of Physics, Faculty of Science, University of Singapore, 10 Kent Ridge Crescent, Singapore 119260 (Singapore)

Clauser-Horne-Shimony-Holt inequality for bipartite systems of four dimensions is studied in detail by employing the unbiased eight-port beam splitters measurements. The uniform formulas for the maximum and minimum values of this inequality for such measurements are obtained. Based on these formulas, we show that an optimal nonmaximally entangled state is about 6% more resistant to noise than the maximally entangled one. We also give the optimal state and the optimal angles which are important for experimental realization.

• OSTI ID: 20640913
• Journal Information: Physical Review. A, Vol. 69, Issue 3; Other Information: DOI: 10.1103/PhysRevA.69.034305; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

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