Fabrication and characterization of all-Nb lumped-element Josephson parametric amplifiers

doi:10.1088/1674-1056/abeee6

中国物理B ›› 2021, Vol. 30 ›› Issue (6): 68503-068503.doi: 10.1088/1674-1056/abeee6

所属专题： SPECIAL TOPIC — Quantum computation and quantum simulation

Fabrication and characterization of all-Nb lumped-element Josephson parametric amplifiers

Hang Xue(薛航)^1,2,3, Zhirong Lin(林志荣)^1,2,3,†, Wenbing Jiang(江文兵)^1,3, Zhengqi Niu(牛铮琦)^1,2,3,4, Kuang Liu(刘匡)^1,2,3, Wei Peng(彭炜)^1,2,3, and Zhen Wang(王镇)^1,2,3,4

1 State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology(SIMIT), Chinese Academy of Sciences, Shanghai 200050, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 CAS Center for Excellence in Superconducting Electronics(CENSE), Shanghai 200050, China;
4 ShanghaiTech University, Shanghai 201210, China

收稿日期:2021-01-13 修回日期:2021-02-25 接受日期:2021-03-16 出版日期:2021-05-18 发布日期:2021-06-05
通讯作者: Zhirong Lin E-mail:zrlin@mail.sim.ac.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 92065116), Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA18000000), and the Key-Area Research and Development Program of Guangdong Province, China (Grant No. 2020B0303030002).

Fabrication and characterization of all-Nb lumped-element Josephson parametric amplifiers

Hang Xue(薛航)^1,2,3, Zhirong Lin(林志荣)^1,2,3,†, Wenbing Jiang(江文兵)^1,3, Zhengqi Niu(牛铮琦)^1,2,3,4, Kuang Liu(刘匡)^1,2,3, Wei Peng(彭炜)^1,2,3, and Zhen Wang(王镇)^1,2,3,4

1 State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology(SIMIT), Chinese Academy of Sciences, Shanghai 200050, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 CAS Center for Excellence in Superconducting Electronics(CENSE), Shanghai 200050, China;
4 ShanghaiTech University, Shanghai 201210, China

Received:2021-01-13 Revised:2021-02-25 Accepted:2021-03-16 Online:2021-05-18 Published:2021-06-05
Contact: Zhirong Lin E-mail:zrlin@mail.sim.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 92065116), Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA18000000), and the Key-Area Research and Development Program of Guangdong Province, China (Grant No. 2020B0303030002).

摘要/Abstract

摘要： Josephson parametric amplifiers (JPAs) with nearly quantum-limited noise performance have become indispensable devices for the measurements of superconducting quantum information. We have developed an all-Nb lumped-element flux-driven JPA operating in the three-wave mixing mode. Our Nb-based JPA comprises Nb/Al-AlO_x/Nb Josephson junctions, a parallel-plate capacitor with SiO₂ dielectric sandwiched between two Nb layers, a bottom coplanar waveguides layer, and a top Nb wiring layer. We experimentally demonstrate a 20 dB gain over a 190 MHz bandwidth, a mean 1 dB compression of -123 dBm, and near quantum-limited noise performance. This fabrication process can be further used to design impedance transformed parametric amplifiers for multiple-qubit readout.

关键词: Josephson parametric amplifier, Nb/Al-AlO_x/Nb Josephson junctions, lumped-element resonator

Abstract: Josephson parametric amplifiers (JPAs) with nearly quantum-limited noise performance have become indispensable devices for the measurements of superconducting quantum information. We have developed an all-Nb lumped-element flux-driven JPA operating in the three-wave mixing mode. Our Nb-based JPA comprises Nb/Al-AlO_x/Nb Josephson junctions, a parallel-plate capacitor with SiO₂ dielectric sandwiched between two Nb layers, a bottom coplanar waveguides layer, and a top Nb wiring layer. We experimentally demonstrate a 20 dB gain over a 190 MHz bandwidth, a mean 1 dB compression of -123 dBm, and near quantum-limited noise performance. This fabrication process can be further used to design impedance transformed parametric amplifiers for multiple-qubit readout.

Key words: Josephson parametric amplifier, Nb/Al-AlO_x/Nb Josephson junctions, lumped-element resonator

中图分类号: (Josephson devices)

85.25.Cp

85.25.Am (Superconducting device characterization, design, and modeling) 85.25.Dq (Superconducting quantum interference devices (SQUIDs))

Hang Xue(薛航), Zhirong Lin(林志荣), Wenbing Jiang(江文兵), Zhengqi Niu(牛铮琦), Kuang Liu(刘匡), Wei Peng(彭炜), and Zhen Wang(王镇). Fabrication and characterization of all-Nb lumped-element Josephson parametric amplifiers[J]. 中国物理B, 2021, 30(6): 68503-068503.

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Fabrication and characterization of all-Nb lumped-element Josephson parametric amplifiers

Fabrication and characterization of all-Nb lumped-element Josephson parametric amplifiers

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