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Vacuum-gap-based lumped element Josephson parametric amplifier |
| Sishi Wu(吴思诗)1, Dengke Zhang(张登科)2,3, Rui Wang(王锐)2,3, Yulong Liu(刘玉龙)4,†, Shuai-Peng Wang(王帅鹏)1, Qichun Liu(刘其春)4, J S Tsai(蔡兆申)2,3, and Tiefu Li(李铁夫)4,5,‡ |
1 Quantum Physics and Quantum Information Division, Beijing Computational Science Research Center, Beijing 100193, China;
2 Department of Physics, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan;
3 RIKEN Center for Quantum Computing(RQC), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan;
4 Beijing Academy of Quantum Information Sciences, Beijing 100193, China;
5 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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Received: 08 June 2021
Revised: 19 August 2021
Accepted manuscript online: 18 September 2021
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PACS:
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03.67.Lx
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(Quantum computation architectures and implementations)
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85.25.Cp
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(Josephson devices)
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74.50.+r
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(Tunneling phenomena; Josephson effects)
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| Fund: Project supported by 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), and Japan Science and Technology Agency (Moonshot R&D, Grant No. JPMJMS2067 and CREST, Grant No. JPMJCR1676). |
Corresponding Authors:
Yulong Liu, Tiefu Li
E-mail: liuyl@baqis.ac.cn;litf@tsinghua.edu.cn
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Cite this article:
Sishi Wu(吴思诗), Dengke Zhang(张登科), Rui Wang(王锐), Yulong Liu(刘玉龙), Shuai-Peng Wang(王帅鹏), Qichun Liu(刘其春), J S Tsai(蔡兆申), and Tiefu Li(李铁夫) Vacuum-gap-based lumped element Josephson parametric amplifier 2022 Chin. Phys. B 31 010306
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