中国物理B ›› 2022, Vol. 31 ›› Issue (4): 40305-040305.doi: 10.1088/1674-1056/ac3817

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Low-overhead fault-tolerant error correction scheme based on quantum stabilizer codes

Xiu-Bo Chen(陈秀波)1,†, Li-Yun Zhao(赵立云)1, Gang Xu(徐刚)2,3, Xing-Bo Pan(潘兴博)1, Si-Yi Chen(陈思怡)1, Zhen-Wen Cheng(程振文)1, and Yi-Xian Yang(杨义先)1   

  1. 1 Information Security Center, State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China;
    2 School of Information Science and Technology, North China University of Technology, Beijing 100144, China;
    3 Advanced Cryptography and System Security Key Laboratory of Sichuan Province, Chengdu 610025, China
  • 收稿日期:2021-10-21 修回日期:2021-11-08 接受日期:2021-11-10 出版日期:2022-03-16 发布日期:2022-03-25
  • 通讯作者: Xiu-Bo Chen E-mail:flyover100@163.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61671087 and 61962009), the Fundamental Research Funds for the Central Universities, China (Grant No. 2019XD-A02), Huawei Technologies Co. Ltd (Grant No. YBN2020085019), the Open Foundation of Guizhou Provincial Key Laboratory of Public Big Data (Grant No. 2018BDKFJJ018).

Low-overhead fault-tolerant error correction scheme based on quantum stabilizer codes

Xiu-Bo Chen(陈秀波)1,†, Li-Yun Zhao(赵立云)1, Gang Xu(徐刚)2,3, Xing-Bo Pan(潘兴博)1, Si-Yi Chen(陈思怡)1, Zhen-Wen Cheng(程振文)1, and Yi-Xian Yang(杨义先)1   

  1. 1 Information Security Center, State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China;
    2 School of Information Science and Technology, North China University of Technology, Beijing 100144, China;
    3 Advanced Cryptography and System Security Key Laboratory of Sichuan Province, Chengdu 610025, China
  • Received:2021-10-21 Revised:2021-11-08 Accepted:2021-11-10 Online:2022-03-16 Published:2022-03-25
  • Contact: Xiu-Bo Chen E-mail:flyover100@163.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61671087 and 61962009), the Fundamental Research Funds for the Central Universities, China (Grant No. 2019XD-A02), Huawei Technologies Co. Ltd (Grant No. YBN2020085019), the Open Foundation of Guizhou Provincial Key Laboratory of Public Big Data (Grant No. 2018BDKFJJ018).

摘要: Fault-tolerant error-correction (FTEC) circuit is the foundation for achieving reliable quantum computation and remote communication. However, designing a fault-tolerant error correction scheme with a solid error-correction ability and low overhead remains a significant challenge. In this paper, a low-overhead fault-tolerant error correction scheme is proposed for quantum communication systems. Firstly, syndrome ancillas are prepared into Bell states to detect errors caused by channel noise. We propose a detection approach that reduces the propagation path of quantum gate fault and reduces the circuit depth by splitting the stabilizer generator into X-type and Z-type. Additionally, a syndrome extraction circuit is equipped with two flag qubits to detect quantum gate faults, which may also introduce errors into the code block during the error detection process. Finally, analytical results are provided to demonstrate the fault-tolerant performance of the proposed FTEC scheme with the lower overhead of the ancillary qubits and circuit depth.

关键词: fault-tolerant error correction, quantum stabilizer code, gate fault, quantum circuit

Abstract: Fault-tolerant error-correction (FTEC) circuit is the foundation for achieving reliable quantum computation and remote communication. However, designing a fault-tolerant error correction scheme with a solid error-correction ability and low overhead remains a significant challenge. In this paper, a low-overhead fault-tolerant error correction scheme is proposed for quantum communication systems. Firstly, syndrome ancillas are prepared into Bell states to detect errors caused by channel noise. We propose a detection approach that reduces the propagation path of quantum gate fault and reduces the circuit depth by splitting the stabilizer generator into X-type and Z-type. Additionally, a syndrome extraction circuit is equipped with two flag qubits to detect quantum gate faults, which may also introduce errors into the code block during the error detection process. Finally, analytical results are provided to demonstrate the fault-tolerant performance of the proposed FTEC scheme with the lower overhead of the ancillary qubits and circuit depth.

Key words: fault-tolerant error correction, quantum stabilizer code, gate fault, quantum circuit

中图分类号:  (Quantum error correction and other methods for protection against decoherence)

  • 03.67.Pp
03.67.-a (Quantum information) 03.67.Hk (Quantum communication)