Logical Operations with a Dynamical Qubit in Floquet-Bacon-Shor Code

doi:10.1103/425n-6k9s

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	Logical Operations with a Dynamical Qubit in Floquet-Bacon-Shor Code
	Sun, Xuandong 1,2,3; Li, Longcheng 4,5; Wu, Zhiyi 2,6; Guo, Zechen 1,2,3; Huang, Peisheng 2,7; Huang, Wenhui 1,2,3; Li, Qixian 1,2,3; Liang, Yongqi 1,2,3; Liu, Yiting 1,2,3; Sun, Daxiong 1,2,3; Wang, Zilin 2,7; Xie, Changrong 1,2,3; Xiong, Yuzhe 1,2,3; Yang, Xiaohan 1,2,3; Zhang, Jiajian 1,2,3; Zhang, Jiawei 1,2,3; Zhang, Libo 1,2,3; Zhang, Zihao 1,2,3; Guo, Weijie 2; Jiang, Ji 1,2,3; Liu, Song 1,2,3,8; Linpeng, Xiayu 2; Niu, Jingjing 2,8; Qiu, Jiawei 2; Ren, Wenhui 2; Tao, Ziyu 2; Yuan, Yuefeng 2; Zhou, Yuxuan 2; Chu, Ji 2; Zhong, Youpeng 1,2,8; Sun, Xiaoming 4,5; Yu, Dapeng 2,8
	2025-11-25
发表期刊	PHYSICAL REVIEW LETTERS
ISSN	0031-9007
卷号	135 期号:22 页码:7
摘要	Quantum error correction (QEC) protects quantum systems against inevitable noises and control inaccuracies, providing a pathway toward fault-tolerant (FT) quantum computation. Stabilizer codes, including surface code and color code, have long been the focus of research and have seen significant experimental progress in recent years. Recently proposed time-dynamical QEC, including Floquet codes and generalized time-dynamical code implementations, opens up new opportunities for FT quantum computation. By employing a periodic schedule of low-weight parity checks, Floquet codes can generate additional dynamical logical qubits, offering enhanced error correction capabilities and, potentially, higher code performance. Here, we experimentally implement the Floquet-Bacon-Shor code on a superconducting quantum processor. We encode a dynamical logical qubit within a 3 x 3 lattice of data qubits alongside a conventional static logical qubit. We demonstrate FT encoding and measurement of the two-qubit logical states and stabilize these states using repeated error detection. We showcase universal single-qubit logical gates on the dynamical qubit. Furthermore, by implementing a logical controlled-NOT (CNOT) gate, we entangle the dynamical and static logical qubits, generating an error-detected logical Bell state with a fidelity of 75.9%. Our results highlight the potential of Floquet codes for resource-efficient FT quantum computation.
DOI	10.1103/425n-6k9s
收录类别	SCI
语种	英语
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
WOS记录号	WOS:001629376700004
出版者	AMER PHYSICAL SOC
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.204/handle/2XEOYT63/42972
专题	中国科学院计算技术研究所
通讯作者	Chu, Ji; Zhong, Youpeng; Sun, Xiaoming; Yu, Dapeng
作者单位	1.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China 2.Int Quantum Acad, Shenzhen 518048, Peoples R China 3.Southern Univ Sci & Technol, Guangdong Prov Key Lab Quantum Sci & Engn, Shenzhen 518055, Peoples R China 4.Chinese Acad Sci, Inst Comp Technol, State Key Lab Processors, Beijing 100190, Peoples R China 5.Univ Chinese Acad Sci, Sch Comp Sci & Technol, Beijing 100049, Peoples R China 6.Peking Univ, Sch Phys, Beijing 100871, Peoples R China 7.Ningxia Univ, Sch Phys, Yinchuan 750021, Peoples R China 8.Hefei Natl Lab, Shenzhen Branch, Shenzhen 518048, Peoples R China
推荐引用方式 GB/T 7714	Sun, Xuandong,Li, Longcheng,Wu, Zhiyi,et al. Logical Operations with a Dynamical Qubit in Floquet-Bacon-Shor Code[J]. PHYSICAL REVIEW LETTERS,2025,135(22):7.
APA	Sun, Xuandong.,Li, Longcheng.,Wu, Zhiyi.,Guo, Zechen.,Huang, Peisheng.,...&Yu, Dapeng.(2025).Logical Operations with a Dynamical Qubit in Floquet-Bacon-Shor Code.PHYSICAL REVIEW LETTERS,135(22),7.
MLA	Sun, Xuandong,et al."Logical Operations with a Dynamical Qubit in Floquet-Bacon-Shor Code".PHYSICAL REVIEW LETTERS 135.22(2025):7.