FerBo: a noise resilient qubit hybridizing Andreev and fluxonium states
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arXiv
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| Autori principali: | , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866914437562105856 |
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| author | Caceres, J. J. Marco, D. Sanz Ortuzar, J. Flurin, E. Urbina, C. Pothier, H. Goffman, M. F. Matute-Cañadas, F. J. Yeyati, A. Levy |
| author_facet | Caceres, J. J. Marco, D. Sanz Ortuzar, J. Flurin, E. Urbina, C. Pothier, H. Goffman, M. F. Matute-Cañadas, F. J. Yeyati, A. Levy |
| contents | We propose a novel superconducting quantum circuit that should be robust against both relaxation and dephasing over a wide and experimentally accessible parameter range. The circuit consists of a parallel arrangement of a large inductance, a small capacitor, and a well-transmitting Josephson weak link. Protection against relaxation arises from the hybridization between the fermionic degree of freedom associated with Andreev levels in the weak link and the bosonic electromagnetic mode of the LC circuit, hence its name: FerBo. Furthermore, as in the fluxonium qubit, delocalization of the wavefunctions in phase space provides resilience against dephasing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_01145 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | FerBo: a noise resilient qubit hybridizing Andreev and fluxonium states Caceres, J. J. Marco, D. Sanz Ortuzar, J. Flurin, E. Urbina, C. Pothier, H. Goffman, M. F. Matute-Cañadas, F. J. Yeyati, A. Levy Mesoscale and Nanoscale Physics Superconductivity Quantum Physics We propose a novel superconducting quantum circuit that should be robust against both relaxation and dephasing over a wide and experimentally accessible parameter range. The circuit consists of a parallel arrangement of a large inductance, a small capacitor, and a well-transmitting Josephson weak link. Protection against relaxation arises from the hybridization between the fermionic degree of freedom associated with Andreev levels in the weak link and the bosonic electromagnetic mode of the LC circuit, hence its name: FerBo. Furthermore, as in the fluxonium qubit, delocalization of the wavefunctions in phase space provides resilience against dephasing. |
| title | FerBo: a noise resilient qubit hybridizing Andreev and fluxonium states |
| topic | Mesoscale and Nanoscale Physics Superconductivity Quantum Physics |
| url | https://arxiv.org/abs/2604.01145 |