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Special Issue:
SPECIAL TOPIC — Quantum computation and quantum simulation
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| SPECIAL TOPIC—Quantum computation and quantum simulation |
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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 |
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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-AlOx/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.
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Received: 13 January 2021
Revised: 25 February 2021
Accepted manuscript online: 16 March 2021
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PACS:
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85.25.Cp
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(Josephson devices)
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85.25.Am
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(Superconducting device characterization, design, and modeling)
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85.25.Dq
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(Superconducting quantum interference devices (SQUIDs))
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| Fund: 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). |
Corresponding Authors:
Zhirong Lin
E-mail: zrlin@mail.sim.ac.cn
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Cite this article:
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 2021 Chin. Phys. B 30 068503
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