Verifying the analogy between transversely coupled spin-1/2 systems and inductively-coupled fluxoniums
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arXiv
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| Hauptverfasser: | , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866917956378689536 |
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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 | We report a detailed characterization of two inductively coupled superconducting fluxonium qubits for implementing high-fidelity cross-resonance gates. Our circuit stands out because it behaves very closely to the case of two transversely coupled spin-1/2 systems. In particular, the generally unwanted static ZZ-term due to the non-computational transitions is nearly absent despite a strong qubit-qubit hybridization. Spectroscopy of the non-computational transitions reveals a spurious LC-mode arising from the combination of the coupling inductance and the capacitive links between the terminals of the two qubit circuits. Such a mode has a minor effect on our specific device, but it must be carefully considered for optimizing future designs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_15450 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Verifying the analogy between transversely coupled spin-1/2 systems and inductively-coupled fluxoniums Lin, Wei-Ju Cho, Hyunheung Chen, Yinqi Vavilov, Maxim G. Wang, Chen Manucharyan, Vladimir E. Quantum Physics Mesoscale and Nanoscale Physics We report a detailed characterization of two inductively coupled superconducting fluxonium qubits for implementing high-fidelity cross-resonance gates. Our circuit stands out because it behaves very closely to the case of two transversely coupled spin-1/2 systems. In particular, the generally unwanted static ZZ-term due to the non-computational transitions is nearly absent despite a strong qubit-qubit hybridization. Spectroscopy of the non-computational transitions reveals a spurious LC-mode arising from the combination of the coupling inductance and the capacitive links between the terminals of the two qubit circuits. Such a mode has a minor effect on our specific device, but it must be carefully considered for optimizing future designs. |
| title | Verifying the analogy between transversely coupled spin-1/2 systems and inductively-coupled fluxoniums |
| topic | Quantum Physics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2407.15450 |