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Two-step entanglement concentration for arbitrary electronic cluster state

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Abstract

We present an efficient protocol for concentrating an arbitrary four-electron less-entangled cluster state into a maximally entangled cluster state. As a two-step entanglement concentration protocol (ECP), it only needs one pair of less-entangled cluster state, which makes this ECP more economical. With the help of electronic polarization beam splitter (PBS) and the charge detection, the whole concentration process is essentially the quantum nondemolition (QND) measurement. Therefore, the concentrated maximally entangled state can be remained for further application. Moreover, the discarded terms in some traditional ECPs can be reused to obtain a high success probability. It is feasible and useful in current one-way quantum computation.

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Acknowledgments

This work is supported by the National Natural Science Foundation of China under Grant No. 11104159, University Natural Science Research Project of Jiangsu Province under Grant No. 13KJB140010, Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, the Open Research Fund Program of National Laboratory of Solid State Microstructures under Grant No. M25022, the open research fund of Key Lab of Broadband Wireless Communication and Sensor Network Technology, Nanjing University of Posts and Telecommunications, Ministry of Education (No. NYKL201303), and the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.

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Authors and Affiliations

  1. Key Lab of Broadband Wireless Communication and Sensor Network Technology, Nanjing University of Posts and Telecommunications, Ministry of Education, Nanjing, 210003, China

    Sheng-Yang Zhao, Jiong Liu, Lan Zhou & Yu-Bo Sheng

  2. Institute of Signal Processing Transmission, Nanjing, 210003, China

    Sheng-Yang Zhao, Jiong Liu & Yu-Bo Sheng

  3. College of Mathematics and Physics, Nanjing University of Posts and Telecommunications, Nanjing, 210003, China

    Lan Zhou

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  1. Sheng-Yang Zhao
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Correspondence to Yu-Bo Sheng.

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Zhao, SY., Liu, J., Zhou, L. et al. Two-step entanglement concentration for arbitrary electronic cluster state. Quantum Inf Process 12, 3633–3647 (2013). https://doi.org/10.1007/s11128-013-0623-8

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  • DOI: https://doi.org/10.1007/s11128-013-0623-8

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