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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2401.01810 |
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| _version_ | 1866916300849152000 |
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| author | Yi, Kangyuan Hai, Yong-Ju Luo, Kai Chu, Ji Zhang, Libo Zhou, Yuxuan Song, Yao Liu, Song Yan, Tongxing Deng, Xiu-Hao Chen, Yuanzhen Yu, Dapeng |
| author_facet | Yi, Kangyuan Hai, Yong-Ju Luo, Kai Chu, Ji Zhang, Libo Zhou, Yuxuan Song, Yao Liu, Song Yan, Tongxing Deng, Xiu-Hao Chen, Yuanzhen Yu, Dapeng |
| contents | As quantum circuits become more integrated and complex, additional error sources that were previously insignificant start to emerge. Consequently, the fidelity of quantum gates benchmarked under pristine conditions falls short of predicting their performance in realistic circuits. To overcome this problem, we must improve their robustness against pertinent error models besides isolated fidelity. Here we report the experimental realization of robust quantum gates in superconducting quantum circuits based on a geometric framework for diagnosing and correcting various gate errors. Using quantum process tomography and randomized benchmarking, we demonstrate robust single-qubit gates against quasi-static noise and spatially-correlated noise in a broad range of strengths, which are common sources of coherent errors in large-scale quantum circuit. We also apply our method to non-static noises and to realize robust two-qubit gates. Our work provides a versatile toolbox for achieving noise-resilient complex quantum circuits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_01810 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Robust Quantum Gates against Correlated Noise in Integrated Quantum Chips Yi, Kangyuan Hai, Yong-Ju Luo, Kai Chu, Ji Zhang, Libo Zhou, Yuxuan Song, Yao Liu, Song Yan, Tongxing Deng, Xiu-Hao Chen, Yuanzhen Yu, Dapeng Quantum Physics As quantum circuits become more integrated and complex, additional error sources that were previously insignificant start to emerge. Consequently, the fidelity of quantum gates benchmarked under pristine conditions falls short of predicting their performance in realistic circuits. To overcome this problem, we must improve their robustness against pertinent error models besides isolated fidelity. Here we report the experimental realization of robust quantum gates in superconducting quantum circuits based on a geometric framework for diagnosing and correcting various gate errors. Using quantum process tomography and randomized benchmarking, we demonstrate robust single-qubit gates against quasi-static noise and spatially-correlated noise in a broad range of strengths, which are common sources of coherent errors in large-scale quantum circuit. We also apply our method to non-static noises and to realize robust two-qubit gates. Our work provides a versatile toolbox for achieving noise-resilient complex quantum circuits. |
| title | Robust Quantum Gates against Correlated Noise in Integrated Quantum Chips |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2401.01810 |