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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2022
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| Accès en ligne: | https://arxiv.org/abs/2211.05660 |
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| _version_ | 1866911743651872768 |
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| author | Vakhtel, Tereza van Heck, Bernard |
| author_facet | Vakhtel, Tereza van Heck, Bernard |
| contents | We investigate the consequences of resonant tunneling of Cooper pairs on the quantum phase slips occurring in a Josephson junction. The amplitude for quantum tunneling under the Josephson potential barrier is modified by the Landau-Zener amplitude of adiabatic passage through an Andreev level crossing, resulting in the suppression of $2π$ phase slips. As a consequence, close to resonance, $4π$ phase slips become the dominant tunneling process. We illustrate this crossover by determining the energy spectrum of a transmon circuit, showing that a residual charge dispersion persists even at perfect transparency. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2211_05660 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Quantum phase slips in a resonant Josephson junction Vakhtel, Tereza van Heck, Bernard Mesoscale and Nanoscale Physics Superconductivity We investigate the consequences of resonant tunneling of Cooper pairs on the quantum phase slips occurring in a Josephson junction. The amplitude for quantum tunneling under the Josephson potential barrier is modified by the Landau-Zener amplitude of adiabatic passage through an Andreev level crossing, resulting in the suppression of $2π$ phase slips. As a consequence, close to resonance, $4π$ phase slips become the dominant tunneling process. We illustrate this crossover by determining the energy spectrum of a transmon circuit, showing that a residual charge dispersion persists even at perfect transparency. |
| title | Quantum phase slips in a resonant Josephson junction |
| topic | Mesoscale and Nanoscale Physics Superconductivity |
| url | https://arxiv.org/abs/2211.05660 |