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Complete four-photon cluster-state analyzer based on cross-Kerr nonlinearity |
| Wang Zhi-Hui (王志会)a, Zhu Long (朱龙)a, Su Shi-Lei (苏石磊)a, Guo Qi (郭奇)b, Cheng Liu-Yong (程留永)b, Zhu Ai-Dong (朱爱东)a, Zhang Shou (张寿)a |
a Department of Physics, College of Science, Yanbian University, Yanji 133002, China;
b Center for the Condensed-Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China |
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Abstract We propose a method to construct an optical cluster-state analyzer based on cross-Kerr nonlinearity combined with linear optics elements. In the scheme, we employ two four-qubit parity gates and the controlled phase gate (CPG) from only the cross-Kerr nonlinearity and show that all the orthogonal four-qubit cluster states can be completely identified. The scheme is significant for the large-scale quantum communication and quantum information processing networks. In addition, the scheme is feasible and deterministic under current experimental conditions.
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Received: 25 December 2012
Revised: 17 April 2013
Accepted manuscript online:
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PACS:
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03.67.-a
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(Quantum information)
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42.50.Ex
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(Optical implementations of quantum information processing and transfer)
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42.65.-k
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(Nonlinear optics)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 60667001 and 11165015). |
Corresponding Authors:
Zhang Shou
E-mail: szhang@ybu.edu.cn
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Cite this article:
Wang Zhi-Hui (王志会), Zhu Long (朱龙), Su Shi-Lei (苏石磊), Guo Qi (郭奇), Cheng Liu-Yong (程留永), Zhu Ai-Dong (朱爱东), Zhang Shou (张寿) Complete four-photon cluster-state analyzer based on cross-Kerr nonlinearity 2013 Chin. Phys. B 22 090309
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