Logical Operations with a Dynamical Qubit in Floquet-Bacon-Shor Code
文献类型：期刊论文
| 作者 | Sun, Xuandong2,3,4; Li, Longcheng5,6; Wu, Zhiyi3,7; Guo, Zechen2,3,4; Huang, Peisheng3,8; Huang, Wenhui2,3,4; Li, Qixian2,3,4; Liang, Yongqi2,3,4; Liu, Yiting2,3,4; Sun, Daxiong2,3,4 |
| 刊名 | PHYSICAL REVIEW LETTERS
 |
| 出版日期 | 2025-11-25 |
| 卷号 | 135期号:22页码:7 |
| ISSN号 | 0031-9007 |
| DOI | 10.1103/425n-6k9s |
| 英文摘要 | 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. |
| 资助项目 | Science, Technology and Innovation Commission of Shenzhen Municipality[KQTD20210811090049034] ; Innovation Program for Quantum Science and Technology[2021ZD0301703] ; National Natural Science Foundation of China[62325210] ; National Natural Science Foundation of China[12174178] ; National Natural Science Foundation of China[12374474] ; National Natural Science Foundation of China[123b2071] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001629376700004 |
| 出版者 | AMER PHYSICAL SOC |
| 源URL | [http://119.78.100.204/handle/2XEOYT63/42971]  |
| 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.Hefei Natl Lab, Shenzhen Branch, Shenzhen 518048, Peoples R China 2.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China 3.Int Quantum Acad, Shenzhen 518048, Peoples R China 4.Southern Univ Sci & Technol, Guangdong Prov Key Lab Quantum Sci & Engn, Shenzhen 518055, Peoples R China 5.Chinese Acad Sci, Inst Comp Technol, State Key Lab Processors, Beijing 100190, Peoples R China 6.Univ Chinese Acad Sci, Sch Comp Sci & Technol, Beijing 100049, Peoples R China 7.Peking Univ, Sch Phys, Beijing 100871, Peoples R China 8.Ningxia Univ, Sch Phys, Yinchuan 750021, 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. |
入库方式： OAI收割
来源：计算技术研究所
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