中国物理B ›› 2020, Vol. 29 ›› Issue (1): 10305-010305.doi: 10.1088/1674-1056/ab5939

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Heralded entanglement purification protocol using high-fidelity parity-check gate based on nitrogen-vacancy center in optical cavity

Lu-Cong Lu(陆路聪), Guan-Yu Wang(王冠玉), Bao-Cang Ren(任宝藏), Mei Zhang(章梅), Fu-Guo Deng(邓富国)   

  1. 1 Department of Physics, Applied Optics Beijing Area Major Laboratory, Beijing Normal University, Beijing 100875, China;
    2 Department of Physics, Capital Normal University, Beijing 100048, China;
    3 College of Mathematics and Physics, Beijing University of Chemical Technology, Beijing 100029, China;
    4 NAAM-Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
  • 收稿日期:2019-08-28 修回日期:2019-11-04 出版日期:2020-01-05 发布日期:2020-01-05
  • 通讯作者: Bao-Cang Ren E-mail:renbaocang@cnu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grants Nos. 11674033, 11474026, 11604226, and 11475021) and Science and Technology Program Foundation of the Beijing Municipal Commission of Education of China (Grant Nos. KM201710028005 and CIT&TCD201904080).

Heralded entanglement purification protocol using high-fidelity parity-check gate based on nitrogen-vacancy center in optical cavity

Lu-Cong Lu(陆路聪)1,2, Guan-Yu Wang(王冠玉)3, Bao-Cang Ren(任宝藏)2, Mei Zhang(章梅)1, Fu-Guo Deng(邓富国)1,4   

  1. 1 Department of Physics, Applied Optics Beijing Area Major Laboratory, Beijing Normal University, Beijing 100875, China;
    2 Department of Physics, Capital Normal University, Beijing 100048, China;
    3 College of Mathematics and Physics, Beijing University of Chemical Technology, Beijing 100029, China;
    4 NAAM-Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
  • Received:2019-08-28 Revised:2019-11-04 Online:2020-01-05 Published:2020-01-05
  • Contact: Bao-Cang Ren E-mail:renbaocang@cnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grants Nos. 11674033, 11474026, 11604226, and 11475021) and Science and Technology Program Foundation of the Beijing Municipal Commission of Education of China (Grant Nos. KM201710028005 and CIT&TCD201904080).

摘要: The decoherence of entangled states caused by the noisy channel is a salient problem for reducing the fidelity of quantum communication. Here we present a heralded two-photon entanglement purification protocol (EPP) using heralded high-fidelity parity-check gate (HH-PCG), which can increase the entanglement of nonlocal two-photon polarization mixed state. The HH-PCG is constructed by the input-output process of nitrogen-vacancy (NV) center in diamond embedded in a single-sided optical cavity, where the errors caused by the imperfect interaction between the NV center-cavity system and the photon can be heralded by the photon detector. As the unwanted components can be filtrated due to the heralded function, the fidelity of the EPP scheme can be enhanced considerably, which will increase the fidelity of quantum communication processing.

关键词: quantum communication, heralded entanglement purification, heralded parity-check gate

Abstract: The decoherence of entangled states caused by the noisy channel is a salient problem for reducing the fidelity of quantum communication. Here we present a heralded two-photon entanglement purification protocol (EPP) using heralded high-fidelity parity-check gate (HH-PCG), which can increase the entanglement of nonlocal two-photon polarization mixed state. The HH-PCG is constructed by the input-output process of nitrogen-vacancy (NV) center in diamond embedded in a single-sided optical cavity, where the errors caused by the imperfect interaction between the NV center-cavity system and the photon can be heralded by the photon detector. As the unwanted components can be filtrated due to the heralded function, the fidelity of the EPP scheme can be enhanced considerably, which will increase the fidelity of quantum communication processing.

Key words: quantum communication, heralded entanglement purification, heralded parity-check gate

中图分类号:  (Quantum information)

  • 03.67.-a
03.67.Hk (Quantum communication) 03.67.Pp (Quantum error correction and other methods for protection against decoherence)