24 days-stable CNOT-gate on fluxonium qubits with over 99.9% fidelity
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arXiv
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866929573472501760 |
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| author | Lin, Wei-Ju Cho, Hyunheung Chen, Yinqi Vavilov, Maxim G. Wang, Chen Manucharyan, Vladimir E. |
| author_facet | Lin, Wei-Ju Cho, Hyunheung Chen, Yinqi Vavilov, Maxim G. Wang, Chen Manucharyan, Vladimir E. |
| contents | Fluxonium qubit is a promising building block for quantum information processing due to its long coherence time and strong anharmonicity. In this paper, we realize a 60 ns direct CNOT-gate on two inductively-coupled fluxonium qubits using selective darkening approach, resulting in a gate fidelity as high as 99.94%. The fidelity remains above 99.9% for 24 days without any recalibration between randomized benchmarking measurements. Compared with the 99.96% fidelity of a 60 ns identity gate, our data brings the investigation of the non-decoherence-related errors during gate operations down to $2 \times 10^{-4}$. The present result adds a simple and robust two-qubit gate into the still relatively small family of "the beyond three nines" demonstrations on superconducting qubits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_15783 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | 24 days-stable CNOT-gate on fluxonium qubits with over 99.9% fidelity Lin, Wei-Ju Cho, Hyunheung Chen, Yinqi Vavilov, Maxim G. Wang, Chen Manucharyan, Vladimir E. Quantum Physics Mesoscale and Nanoscale Physics Fluxonium qubit is a promising building block for quantum information processing due to its long coherence time and strong anharmonicity. In this paper, we realize a 60 ns direct CNOT-gate on two inductively-coupled fluxonium qubits using selective darkening approach, resulting in a gate fidelity as high as 99.94%. The fidelity remains above 99.9% for 24 days without any recalibration between randomized benchmarking measurements. Compared with the 99.96% fidelity of a 60 ns identity gate, our data brings the investigation of the non-decoherence-related errors during gate operations down to $2 \times 10^{-4}$. The present result adds a simple and robust two-qubit gate into the still relatively small family of "the beyond three nines" demonstrations on superconducting qubits. |
| title | 24 days-stable CNOT-gate on fluxonium qubits with over 99.9% fidelity |
| topic | Quantum Physics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2407.15783 |