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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2024
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| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2401.12183 |
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| _version_ | 1866909397867823104 |
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| author | Liu, Bao-Jie Wang, Ying-Ying Sheffer, Tal Wang, Chen |
| author_facet | Liu, Bao-Jie Wang, Ying-Ying Sheffer, Tal Wang, Chen |
| contents | We report observations of discrete charge states of a coherent dielectric two-level system (TLS) that is strongly coupled to an offset-charge-sensitive superconducting transmon qubit. We measure an offset charge of 0.072$e$ associated with the two TLS eigenstates, which have a transition frequency of 2.9 GHz and a relaxation time exceeding 3 ms. Combining measurements in the strong dispersive and resonant regime, we quantify both transverse and longitudinal couplings of the TLS-qubit interaction. We further perform joint tracking of TLS transitions and quasiparticle tunneling dynamics but find no intrinsic correlations. This study demonstrates microwave-frequency TLS as a source of low-frequency charge noise. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_12183 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Observation of discrete charge states of a coherent two-level system in a superconducting qubit Liu, Bao-Jie Wang, Ying-Ying Sheffer, Tal Wang, Chen Quantum Physics We report observations of discrete charge states of a coherent dielectric two-level system (TLS) that is strongly coupled to an offset-charge-sensitive superconducting transmon qubit. We measure an offset charge of 0.072$e$ associated with the two TLS eigenstates, which have a transition frequency of 2.9 GHz and a relaxation time exceeding 3 ms. Combining measurements in the strong dispersive and resonant regime, we quantify both transverse and longitudinal couplings of the TLS-qubit interaction. We further perform joint tracking of TLS transitions and quasiparticle tunneling dynamics but find no intrinsic correlations. This study demonstrates microwave-frequency TLS as a source of low-frequency charge noise. |
| title | Observation of discrete charge states of a coherent two-level system in a superconducting qubit |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2401.12183 |