Identify and Quantify Various Dissipation Mechanisms of Josephson Junction in Superconducting Circuits
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866914159584608256 |
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| author | Deng, Hao Zhan, Huijuan Hu, Lijuan Zhao, Hui-Hai Gao, Ran Lu, Kannan Ma, Xizheng Song, Zhijun Wang, Fei Wang, Tenghui Wu, Feng Xia, Tian Zhang, Gengyan Zhang, Xiaohang Deng, Chunqing |
| author_facet | Deng, Hao Zhan, Huijuan Hu, Lijuan Zhao, Hui-Hai Gao, Ran Lu, Kannan Ma, Xizheng Song, Zhijun Wang, Fei Wang, Tenghui Wu, Feng Xia, Tian Zhang, Gengyan Zhang, Xiaohang Deng, Chunqing |
| contents | Pinpointing the dissipation mechanisms and evaluating their impacts to the performance of Josephson junction (JJ) are crucial for its application in superconducting circuits. In this work, we demonstrate the junction-embedded resonator (JER) as a platform which enables us to identify and quantify various dissipation mechanisms of JJ. JER is constructed by embedding JJ in the middle of an open-circuit, 1/2 λ transmission-line resonator. When the 1st and 2nd harmonics of JER are excited, JJ experiences different boundary conditions, and is dominated by internal and external dissipations, respectively. We systematically study these 2 dissipation mechanisms of JJ by varying the JJ area and number. Our results unveil the completely different behaviors of these 2 dissipation mechanisms, and quantitatively characterize their contributions, shedding a light on the direction of JJ optimization in various applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_15174 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Identify and Quantify Various Dissipation Mechanisms of Josephson Junction in Superconducting Circuits Deng, Hao Zhan, Huijuan Hu, Lijuan Zhao, Hui-Hai Gao, Ran Lu, Kannan Ma, Xizheng Song, Zhijun Wang, Fei Wang, Tenghui Wu, Feng Xia, Tian Zhang, Gengyan Zhang, Xiaohang Deng, Chunqing Quantum Physics Superconductivity Pinpointing the dissipation mechanisms and evaluating their impacts to the performance of Josephson junction (JJ) are crucial for its application in superconducting circuits. In this work, we demonstrate the junction-embedded resonator (JER) as a platform which enables us to identify and quantify various dissipation mechanisms of JJ. JER is constructed by embedding JJ in the middle of an open-circuit, 1/2 λ transmission-line resonator. When the 1st and 2nd harmonics of JER are excited, JJ experiences different boundary conditions, and is dominated by internal and external dissipations, respectively. We systematically study these 2 dissipation mechanisms of JJ by varying the JJ area and number. Our results unveil the completely different behaviors of these 2 dissipation mechanisms, and quantitatively characterize their contributions, shedding a light on the direction of JJ optimization in various applications. |
| title | Identify and Quantify Various Dissipation Mechanisms of Josephson Junction in Superconducting Circuits |
| topic | Quantum Physics Superconductivity |
| url | https://arxiv.org/abs/2508.15174 |