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arXiv 2102.01984quant-phcs.ITmath.IT
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量子数据伴随码的置信传播译码

Decoding of Quantum Data-Syndrome Codes via Belief Propagation

Kao-Yueh Kuo, I-Chun Chern, Ching-Yi Lai

摘要:

量子纠错是保护逻辑量子态和操作所必需的。然而,当伴随式提取由于错误的测量门而错误时,不能进行有意义的数据保护。量子数据伴随式(DS)码被设计为同时保护数据量子比特和伴随式比特。本文提出了一种有效的校验矩阵稀疏的量子DS码译码算法。基于稳定子码的改进置信传播(BP)译码,提出了一种DS-BP算法来处理四进制量子数据错误和二进制伴随式比特错误。此外,稀疏量子码可以固有地能够处理较小的校正子错误,使得需要较少的冗余校正子测量。我们证明了这一点与模拟的量子超图产品代码。

英文摘要:

Quantum error correction is necessary to protect logical quantum states and operations. However, no meaningful data protection can be made when the syndrome extraction is erroneous due to faulty measurement gates. Quantum data-syndrome (DS) codes are designed to protect the data qubits and syndrome bits concurrently. In this paper, we propose an efficient decoding algorithm for quantum DS codes with sparse check matrices. Based on a refined belief propagation (BP) decoding for stabilizer codes, we propose a DS-BP algorithm to handle the quaternary quantum data errors and binary syndrome bit errors. Moreover, a sparse quantum code may inherently be able to handle minor syndrome errors so that fewer redundant syndrome measurements are necessary. We demonstrate this with simulations on a quantum hypergraph-product code.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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