Realization of high-fidelity perfect entangler between remote superconducting quantum processors
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arXiv
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| Auteurs principaux: | , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866914961721131008 |
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| author | Song, Juan Yang, Shuang Liu, Pei Zhang, Hui-Li Xue, Guang-Ming Mi, Zhen-Yu Zhang, Wen-Gang Yan, Fei Jin, Yi-Rong Yu, Hai-Feng |
| author_facet | Song, Juan Yang, Shuang Liu, Pei Zhang, Hui-Li Xue, Guang-Ming Mi, Zhen-Yu Zhang, Wen-Gang Yan, Fei Jin, Yi-Rong Yu, Hai-Feng |
| contents | Superconducting qubits, a promising candidate for universal quantum computing, currently face limitations in chip size due to reproducibility, wiring complexity, and packaging modes. Distributed quantum modules offer a viable strategy for constructing larger quantum information processing systems, though universal quantum gate operations between remote qubits have yet to be realized. Here, we demonstrate high-fidelity perfect entanglers between two remote superconducting quantum devices over 30 cm distance, leveraging the standing-wave modes in the coaxial cable connecting them. We achieve cross-entropy benchmarking (XEB) fidelities of $(99.15 \pm 0.02)\%$ and $(98.04 \pm 0.04)\%$ for CNOT and CZ gates, respectively, which are more efficient and universal than existing state transfer or feedback-based protocols. This advancement significantly enhances the feasibility of universal distributed quantum information processing, essential for the future development of large-scale quantum systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_20338 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Realization of high-fidelity perfect entangler between remote superconducting quantum processors Song, Juan Yang, Shuang Liu, Pei Zhang, Hui-Li Xue, Guang-Ming Mi, Zhen-Yu Zhang, Wen-Gang Yan, Fei Jin, Yi-Rong Yu, Hai-Feng Quantum Physics Superconducting qubits, a promising candidate for universal quantum computing, currently face limitations in chip size due to reproducibility, wiring complexity, and packaging modes. Distributed quantum modules offer a viable strategy for constructing larger quantum information processing systems, though universal quantum gate operations between remote qubits have yet to be realized. Here, we demonstrate high-fidelity perfect entanglers between two remote superconducting quantum devices over 30 cm distance, leveraging the standing-wave modes in the coaxial cable connecting them. We achieve cross-entropy benchmarking (XEB) fidelities of $(99.15 \pm 0.02)\%$ and $(98.04 \pm 0.04)\%$ for CNOT and CZ gates, respectively, which are more efficient and universal than existing state transfer or feedback-based protocols. This advancement significantly enhances the feasibility of universal distributed quantum information processing, essential for the future development of large-scale quantum systems. |
| title | Realization of high-fidelity perfect entangler between remote superconducting quantum processors |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2407.20338 |