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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2604.05693 |
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| _version_ | 1866913010210045952 |
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| author | Liu, Kuang Wang, Zhiyuan He, Xiaoliang Li, Siqi Wu, Hao Ren, Xiangyu Niu, Zhengqi Gao, Wangpeng Zhang, Chenluo Huang, Pei Wu, Yu Ying, Liliang Peng, Wei Tsai, Jaw-Shen Lin, Zhirong |
| author_facet | Liu, Kuang Wang, Zhiyuan He, Xiaoliang Li, Siqi Wu, Hao Ren, Xiangyu Niu, Zhengqi Gao, Wangpeng Zhang, Chenluo Huang, Pei Wu, Yu Ying, Liliang Peng, Wei Tsai, Jaw-Shen Lin, Zhirong |
| contents | The development of large-scale superconducting quantum computing requires efficient in-situ control methods that allow high-fidelity operations at millikelvin temperatures. Superconducting circuits based on Josephson junctions offer a promising solution due to their high speed, low power dissipation, and cryogenic nature. Here, we report a superconducting quantum controller that enables direct chip-to-chip interconnection with qubits at 10 mK and high-fidelity, all-digital manipulation. Randomized benchmarking reveals a uniformly high average Clifford fidelity of 99.9% with leakage to high energy levels on the order of $10^{-4}$, and an estimated average gate operation energy of 0.121 fJ, demonstrating the potential to resolve the control bottleneck in superconducting quantum computing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_05693 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | A plug-and-play superconducting quantum controller at millikelvin temperatures enables exceeding 99.9% average gate fidelity Liu, Kuang Wang, Zhiyuan He, Xiaoliang Li, Siqi Wu, Hao Ren, Xiangyu Niu, Zhengqi Gao, Wangpeng Zhang, Chenluo Huang, Pei Wu, Yu Ying, Liliang Peng, Wei Tsai, Jaw-Shen Lin, Zhirong Quantum Physics The development of large-scale superconducting quantum computing requires efficient in-situ control methods that allow high-fidelity operations at millikelvin temperatures. Superconducting circuits based on Josephson junctions offer a promising solution due to their high speed, low power dissipation, and cryogenic nature. Here, we report a superconducting quantum controller that enables direct chip-to-chip interconnection with qubits at 10 mK and high-fidelity, all-digital manipulation. Randomized benchmarking reveals a uniformly high average Clifford fidelity of 99.9% with leakage to high energy levels on the order of $10^{-4}$, and an estimated average gate operation energy of 0.121 fJ, demonstrating the potential to resolve the control bottleneck in superconducting quantum computing. |
| title | A plug-and-play superconducting quantum controller at millikelvin temperatures enables exceeding 99.9% average gate fidelity |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2604.05693 |