Impedance matched Josephson parametric amplifier with a multisection λ/4 transmission line transformer

被引：0

作者：

Zhou, Tianshi ^{[1
,2
,3
]}

Xu, Wenqu ^{[1
,3
]}

Zuo, Quan ^{[1
,3
]}

Pan, Jiazheng ^{[1
,2
]}

Li, Zishuo ^{[1
,3
]}

Zhang, Kaixuan ^{[1
,3
]}

Guo, Tingting ^{[1
,3
]}

Sheng, Yifan ^{[1
,3
]}

Jing, Lingxiao ^{[1
,3
]}

Ma, Huashi ^{[1
,3
]}

Yu, Mingyuan ^{[1
,3
]}

Zhou, Shunhong ^{[1
,3
]}

Li, Binglin ^{[1
,3
]}

Yang, Shiyao ^{[1
,3
]}

Yu, Yongyang ^{[1
,3
]}

Zhu, Jiyuan ^{[1
,3
]}

Zhang, Junzhou ^{[1
,3
]}

Li, Jinpeng ^{[1
,2
]}

Cao, Chunhai ^{[1
,3
]}

Sun, Guozhu ^{[1
,2
,3
,4
]}

Wu, Peiheng ^{[1
,2
,3
]}

机构：

[1] Nanjing Univ, Res Inst Supercond Elect, Sch Elect Sci & Engn, Nanjing 210023, Peoples R China

[2] Purple Mt Labs, Nanjing 211111, Peoples R China

[3] Hefei Natl Lab, Hefei 230088, Peoples R China

[4] Nanjing Univ, Shishan Lab, Suzhou Campus, Suzhou 215163, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2025年 / 126卷 / 10期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

BAND; NOISE; QUBIT; READOUT;

D O I：

10.1063/5.0250918

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the fabrication and characterization of an impedance matched Josephson parametric amplifier (IMPA). A multisection lambda/4 transmission line transformer (TLT) is utilized, which can reduce the input impedance and provide a wide impedance matched bandwidth. In addition, the whole IMPA device is fabricated on a LaAlO3 substrate with a dielectric constant of 23.4, much larger compared to the commonly used intrinsic silicon substrate, to provide larger grounded capacitance, making the fabrication of the multisection lambda/4 TLT more precise and reliable. The experimental results show that by adjusting the working point, the amplifier has a bandwidth of 580 MHz with a gain of more than 15 dB. The average input saturation power is about -115 dBm within the bandwidth. Additionally, its noise performance is close to the quantum-limited level.

引用

页数：5

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