| Vacuum-gap-based lumped element Josephson parametric amplifier |
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| 作者姓名： | 吴思诗 张登科 王锐 刘玉龙 王帅鹏 刘其春 蔡兆申 李铁夫 |
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| 作者单位： | Quantum Physics and Quantum Information Division;Department of Physics;RIKEN Center for Quantum Computing（RQC）;Beijing Academy of Quantum Information Sciences;School of Integrated Circuits |
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| 基金项目： | the National Key Research and Development Program of China(Grant No.2016YFA0301200);the National Natural Science Foundation of China(Grant Nos.62074091,12004044,and U1930402);the Science Challenge Project(Grant No.TZ2018003);the Fund from the New Energy and Industrial Technology Development Organization(Grant No.JPNP16007);Japan Science and Technology Agency(Moonshot R&D,Grant No.JPMJMS2067 and CREST,Grant No.JPMJCR1676). |
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| 摘 要： | We propose a lumped element Josephson parametric amplifier with vacuum-gap-based capacitor.The capacitor is made of quasi-floating aluminum pad and on-chip ground.We take a fabrication process compatible with air-bridge technology,which makes our design adaptable for future on-chip integrated quantum computing system.Further engineering the input impedance,we obtain a gain above 20 dB over 162-MHz bandwidth,along with a quasi quantum-limit noise performance.This work should facilitate the development of quantum information processing and integrated superconducting circuit design.
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| 关 键 词： | Josephson parametric amplifier vacuum gap quantum-limit noise |
| 收稿时间： | 2021-06-08 |
Vacuum-gap-based lumped element Josephson parametric amplifier |
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| Sishi Wu,Dengke Zhang,Rui Wang,Yulong Liu,Shuai-Peng Wang,Qichun Liu,J S Tsai,Tiefu Li.Vacuum-gap-based lumped element Josephson parametric amplifier[J].Chinese Physics B,2022,31(1):10306-010306. |
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| Authors: | Sishi Wu Dengke Zhang Rui Wang Yulong Liu Shuai-Peng Wang Qichun Liu J S Tsai Tiefu Li |
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| Institution: | (Quantum Physics and Quantum Information Division,Beijing Computational Science Research Center,Beijing 100193,China;Department of Physics,Tokyo University of Science,Kagurazaka,Shinjuku-ku,Tokyo 162-8601,Japan;RIKEN Center for Quantum Computing(RQC),2-1 Hirosawa,Wako,Saitama 351-0198,Japan;Beijing Academy of Quantum Information Sciences,Beijing 100193,China;School of Integrated Circuits,and Frontier Science Center for Quantum Information,Tsinghua University,Beijing 100084,China) |
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| Abstract: | We propose a lumped element Josephson parametric amplifier with vacuum-gap-based capacitor. The capacitor is made of quasi-floating aluminum pad and on-chip ground. We take a fabrication process compatible with air-bridge technology, which makes our design adaptable for future on-chip integrated quantum computing system. Further engineering the input impedance, we obtain a gain above 20 dB over 162-MHz bandwidth, along with a quasi quantum-limit noise performance. This work should facilitate the development of quantum information processing and integrated superconducting circuit design. |
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| Keywords: | Josephson parametric amplifier vacuum gap quantum-limit noise |
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