Broadband merged-element Josephson parametric amplifier

• URL: http://arxiv.org/abs/2506.14651v1
• Date: Tue, 17 Jun 2025 15:43:30 GMT
• Title: Broadband merged-element Josephson parametric amplifier
• Authors: Yuting Sun, Xianke Li, Qingyu Wang, Tairong Bai, Xudong Liao, Dong Lan, Jie Zhao, Yang Yu,
• Abstract summary: We introduce the broadband merged-element Josephson parametric amplifier.<n>Results show a gain of 15 dB over a 500 MHz bandwidth, a mean saturation power of -116 dBm, and near-quantum-limited noise performance.
• Score: 5.693098649995825
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Broadband quantum-limited amplifiers are essential for quantum information processing, yet challenges in design and fabrication continue to hinder their widespread applications. Here, we introduce the broadband merged-element Josephson parametric amplifier in which the discrete parallel capacitor is directly integrated with the Josephson junctions. This merged-element design eliminates the shortcomings of discrete capacitors, simplifying the fabrication process, reducing the need for high-precision lithography tools, and ensuring compatibility with standard superconducting qubit fabrication procedures. Experimental results demonstrate a gain of 15 dB over a 500 MHz bandwidth, a mean saturation power of -116 dBm and near-quantum-limited noise performance. This robust readily implemented parametric amplifier holds significant promise for broader applications in superconducting quantum information and the advancement of quantum computation.

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