期刊
CHINESE PHYSICS B
卷 31, 期 1, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1674-1056/ac280c
关键词
Josephson parametric amplifier; vacuum gap; quantum-limit noise
资金
- National Key Research and Development Program of China [2016YFA0301200]
- National Natural Science Foundation of China [62074091, 12004044, U1930402]
- Science Challenge Project [TZ2018003]
- Fund from the New Energy and Industrial Technology Development Organization [JPNP16007]
- Japan Science and Technology Agency (Moonshot RD) [JPMJMS2067, JPMJCR1676]
A lumped element Josephson parametric amplifier with vacuum-gap-based capacitor is proposed. By engineering the input impedance, it achieves a high gain and quasi quantum-limit noise performance. This design is adaptable for future on-chip integrated quantum computing systems.
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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