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Efficient entanglement purification for doubly entangled photon state

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Abstract

In this paper, we present an efficient purification scheme that improves the efficiency of entanglement purification of the recently proposed entanglement purification scheme for doubly entangled photon states (Phys. Rev. A, 2008, 77: 042315). This modified scheme contains the bit-flip error correction where all the photon pairs can be kept while all the bit-flip errors are corrected and the entanglement purification of phase-flip errors where a wavelength conversion process is used. This scheme has the advantage of high efficiency and a much lower minimum fidelity of the original state. It works under existing technology.

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Authors and Affiliations

  1. School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876, China

    Chuan Wang

  2. Institute of Low Energy, Nuclear Physics, and Department of Material Science and Engineering, Beijing Normal University, Beijing, 100875, China

    YuBo Sheng, XiHan Li & FuGuo Deng

  3. Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China

    Wei Zhang

  4. Department of Physics, Tsinghua University, Beijing, 100084, China

    GuiLu Long

  5. Tsinghua National Laboratory for Information Science and Technology, Tsinghua University, Beijing, 100084, China

    GuiLu Long

Authors
  1. Chuan Wang
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  2. YuBo Sheng
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  3. XiHan Li
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  4. FuGuo Deng
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  5. Wei Zhang
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  6. GuiLu Long
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Corresponding author

Correspondence to GuiLu Long.

Additional information

Supported by the National Natural Science Foundation of China (Grant Nos. 10604008, 10874098, 10775076), the National Fundamental Research Program of China (Grant No. 2006CB921106)

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Wang, C., Sheng, Y., Li, X. et al. Efficient entanglement purification for doubly entangled photon state. Sci. China Ser. E-Technol. Sci. 52, 3464–3467 (2009). https://doi.org/10.1007/s11431-009-0307-x

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  • DOI: https://doi.org/10.1007/s11431-009-0307-x

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