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Atomic entanglement purification using photonic Faraday rotation

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Abstract

We describe an entanglement purification protocol (EPP) for atomic entangled pair using photonic Faraday rotation. Through the two single-photon input–output process in cavity quantum electrodynamics (QED), it is shown that the high-quality entangled atomic states can be obtained from the low-quality mixed entangled atomic states. Different from other EPPs, the two pairs of mixed states do not need to intact directly. As the photonic Faraday rotation works on the low-Q cavities, this EPP is useful in both quantum communication and computation.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China under Grant No. 11104159, University Natural Science Research Project of Jiangsu Province under Grant Nos. 13KJB140010, 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. Institute of Signal Processing Transmission, Nanjing University of Posts and Telecommunications, Nanjing, 210003, China

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

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

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

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

    Lan Zhou

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

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Sheng, YB., Zhao, SY., Liu, J. et al. Atomic entanglement purification using photonic Faraday rotation. Quantum Inf Process 13, 881–893 (2014). https://doi.org/10.1007/s11128-013-0698-2

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