Verifying the analogy between transversely coupled spin-1/2 systems and inductively-coupled fluxoniums
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 unw...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/adb77b |
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| _version_ | 1850151177923067904 |
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| author | Wei-Ju Lin Hyunheung Cho Yinqi Chen Maxim G Vavilov Chen Wang Vladimir E Manucharyan |
| author_facet | Wei-Ju Lin Hyunheung Cho Yinqi Chen Maxim G Vavilov Chen Wang Vladimir E Manucharyan |
| author_sort | Wei-Ju Lin |
| collection | DOAJ |
| description | 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 circuit. Such a mode has a minor effect on the present device, but it must be carefully considered for optimizing future multi-qubit designs. |
| format | Article |
| id | doaj-art-baa034accdfd408eb393c742fcc2ef99 |
| institution | OA Journals |
| issn | 1367-2630 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj-art-baa034accdfd408eb393c742fcc2ef992025-08-20T02:26:20ZengIOP PublishingNew Journal of Physics1367-26302025-01-0127303301210.1088/1367-2630/adb77bVerifying the analogy between transversely coupled spin-1/2 systems and inductively-coupled fluxoniumsWei-Ju Lin0https://orcid.org/0009-0008-0021-2042Hyunheung Cho1Yinqi Chen2Maxim G Vavilov3Chen Wang4Vladimir E Manucharyan5Department of Physics, University of Maryland , College Park, MD, United States of AmericaDepartment of Physics, University of Maryland , College Park, MD, United States of AmericaDepartment of Physics, University of Wisconsin-Madison , Madison, WI, United States of AmericaDepartment of Physics, University of Wisconsin-Madison , Madison, WI, United States of AmericaDepartment of Physics, University of Massachusetts-Amherst , Amherst, MA, United States of AmericaDepartment of Physics, University of Maryland , College Park, MD, United States of America; Institute of Physics , Ecole Polytechnique Federale de Lausanne, Lausanne, SwitzerlandWe 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 circuit. Such a mode has a minor effect on the present device, but it must be carefully considered for optimizing future multi-qubit designs.https://doi.org/10.1088/1367-2630/adb77bsuperconducting qubitsfluxoniumquantum computation |
| spellingShingle | Wei-Ju Lin Hyunheung Cho Yinqi Chen Maxim G Vavilov Chen Wang Vladimir E Manucharyan Verifying the analogy between transversely coupled spin-1/2 systems and inductively-coupled fluxoniums New Journal of Physics superconducting qubits fluxonium quantum computation |
| title | Verifying the analogy between transversely coupled spin-1/2 systems and inductively-coupled fluxoniums |
| title_full | Verifying the analogy between transversely coupled spin-1/2 systems and inductively-coupled fluxoniums |
| title_fullStr | Verifying the analogy between transversely coupled spin-1/2 systems and inductively-coupled fluxoniums |
| title_full_unstemmed | Verifying the analogy between transversely coupled spin-1/2 systems and inductively-coupled fluxoniums |
| title_short | Verifying the analogy between transversely coupled spin-1/2 systems and inductively-coupled fluxoniums |
| title_sort | verifying the analogy between transversely coupled spin 1 2 systems and inductively coupled fluxoniums |
| topic | superconducting qubits fluxonium quantum computation |
| url | https://doi.org/10.1088/1367-2630/adb77b |
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