Quantum error-correcting codes are essential for fault-tolerant quantum computing,as they effectively detect and correct noise-induced errors by distributing information across multiple physical qubits.The subsystem s...Quantum error-correcting codes are essential for fault-tolerant quantum computing,as they effectively detect and correct noise-induced errors by distributing information across multiple physical qubits.The subsystem surface code with three-qubit check operators demonstrates significant application potential due to its simplified measurement operations and low logical error rates.However,the existing minimum-weight perfect matching(MWPM)algorithm exhibits high computational complexity and lacks flexibility in large-scale systems.Therefore,this paper proposes a decoder based on a graph attention network(GAT),representing error syndromes as undirected graphs with edge weights,and employing a multihead attention mechanism to efficiently aggregate node features and enable parallel computation.Compared to MWPM,the GAT decoder exhibits linear growth in computational complexity,adapts to different quantum code structures,and demonstrates stronger robustness under high physical error rates.The experimental results demonstrate that the proposed decoder achieves an overall accuracy of 89.95%under various small code lattice sizes(L=2,3,4,5),with the logical error rate threshold increasing to 0.0078,representing an improvement of approximately 13.04%compared to the MWPM decoder.This result significantly outperforms traditional methods,showcasing superior performance under small code lattice sizes and providing a more efficient decoding solution for large-scale quantum error correction.展开更多
In this paper,we construct three classes of Clifford subsystem maximum distance separable(MDS)codes based on Reed-Solomon codes and extended generalized Reed-Solomon codes over finite fields Fq for specific code lengt...In this paper,we construct three classes of Clifford subsystem maximum distance separable(MDS)codes based on Reed-Solomon codes and extended generalized Reed-Solomon codes over finite fields Fq for specific code lengths.Moreover,our Clifford subsystem MDS codes are new because their parameters differ from the previously known ones.展开更多
从蓄电池、电源调控器、太阳电池阵及地面供配电测试设备(power supply subsystem special checkoutequipment,PSS SCOE)接口4个方面论述了小卫星电源分系统综合测试方法的发展现状.分析了基于镉镍或锂离子蓄电池,基于S3R,S4R或S3R与S4...从蓄电池、电源调控器、太阳电池阵及地面供配电测试设备(power supply subsystem special checkoutequipment,PSS SCOE)接口4个方面论述了小卫星电源分系统综合测试方法的发展现状.分析了基于镉镍或锂离子蓄电池,基于S3R,S4R或S3R与S4R组合的电源调控系统、双母线系统及太阳电池阵在总装、集成和测试(assembly,integration and test,AIT),大型试验及发射场等全流程中的综合测试方法与特点,以及锂离子蓄电池通断控制引起的PSS SCOE接口变化.指出了未来小卫星电源综合测试的发展趋势,旨在为该领域的发展提供参考,并为提高后续大规模小卫星星座批生产测试效率奠定基础.展开更多
基金Project supported by the Natural Science Foundation of Shandong Province,China(Grant No.ZR2021MF049)the Joint Fund of the Natural Science Foundation of Shandong Province,China(Grant Nos.ZR2022LLZ012 and ZR2021LLZ001)the Key Research and Development Program of Shandong Province,China(Grant No.2023CXGC010901)。
文摘Quantum error-correcting codes are essential for fault-tolerant quantum computing,as they effectively detect and correct noise-induced errors by distributing information across multiple physical qubits.The subsystem surface code with three-qubit check operators demonstrates significant application potential due to its simplified measurement operations and low logical error rates.However,the existing minimum-weight perfect matching(MWPM)algorithm exhibits high computational complexity and lacks flexibility in large-scale systems.Therefore,this paper proposes a decoder based on a graph attention network(GAT),representing error syndromes as undirected graphs with edge weights,and employing a multihead attention mechanism to efficiently aggregate node features and enable parallel computation.Compared to MWPM,the GAT decoder exhibits linear growth in computational complexity,adapts to different quantum code structures,and demonstrates stronger robustness under high physical error rates.The experimental results demonstrate that the proposed decoder achieves an overall accuracy of 89.95%under various small code lattice sizes(L=2,3,4,5),with the logical error rate threshold increasing to 0.0078,representing an improvement of approximately 13.04%compared to the MWPM decoder.This result significantly outperforms traditional methods,showcasing superior performance under small code lattice sizes and providing a more efficient decoding solution for large-scale quantum error correction.
基金Supported by Research Funds of Hubei Province(D20144401 and Q20174503)。
文摘In this paper,we construct three classes of Clifford subsystem maximum distance separable(MDS)codes based on Reed-Solomon codes and extended generalized Reed-Solomon codes over finite fields Fq for specific code lengths.Moreover,our Clifford subsystem MDS codes are new because their parameters differ from the previously known ones.
文摘从蓄电池、电源调控器、太阳电池阵及地面供配电测试设备(power supply subsystem special checkoutequipment,PSS SCOE)接口4个方面论述了小卫星电源分系统综合测试方法的发展现状.分析了基于镉镍或锂离子蓄电池,基于S3R,S4R或S3R与S4R组合的电源调控系统、双母线系统及太阳电池阵在总装、集成和测试(assembly,integration and test,AIT),大型试验及发射场等全流程中的综合测试方法与特点,以及锂离子蓄电池通断控制引起的PSS SCOE接口变化.指出了未来小卫星电源综合测试的发展趋势,旨在为该领域的发展提供参考,并为提高后续大规模小卫星星座批生产测试效率奠定基础.
