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Efficient Entanglement Concentration for Arbitrary Less-Entangled N-Atom GHZ State

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Abstract

In this paper, we put forward an effective ECP for arbitrary less-entangled N-atom GHZ state with the help of the photonic Faraday rotation. In our protocol, we only require one pair of less-entangled atom state, one auxiliary atom and one auxiliary photon, and can complete the concentration task with relatively high success probability. Moreover, our ECP can be used repeatedly to further increase the success probability. Especially, if consider the practical operation and imperfect detection, our protocol is more efficient. This ECP may be useful in current quantum information processing.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China under Grant Nos. 11104159, 11347110, the Scientific Research Foundation of Nanjing University of Posts and Telecommunications (Grant No. NY213054), and the Priority Academic Program Development of Jiangsu Higher Education Institutions.

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Authors and Affiliations

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

    Lan Zhou & Xing-Fu Wang

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

    Lan Zhou & Yu-Bo Sheng

  3. Institute of Signal Processing Transmission, Nanjing University of Posts and Telecommunications, Nanjing, 210003, China

    Yu-Bo Sheng

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  1. Lan Zhou
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Correspondence to Yu-Bo Sheng.

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Zhou, L., Wang, XF. & Sheng, YB. Efficient Entanglement Concentration for Arbitrary Less-Entangled N-Atom GHZ State. Int J Theor Phys 53, 1752–1766 (2014). https://doi.org/10.1007/s10773-013-1974-8

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  • DOI: https://doi.org/10.1007/s10773-013-1974-8

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