Vacuum-gap-based lumped element Josephson parametric amplifier  

作　　者：Sishi Wu Dengke Zhang Rui Wang Yulong Liu Shuai-Peng Wang Qichun Liu J S Tsai Tiefu Li 吴思诗;张登科;王锐;刘玉龙;王帅鹏;刘其春;蔡兆申;李铁夫(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)

机构地区：[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

出　　处：《Chinese Physics B》2022年第1期159-164,共6页中国物理B（英文版）

基　　金：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).

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.

关 键 词：Josephson parametric amplifier vacuum gap quantum-limit noise 

分 类 号：TN722[电子电信—电路与系统]