Quantum 2025 – scientific programme
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MON: Monday Contributed Sessions
MON 14: QIP Implementations: Solid-State Devices I
MON 14.8: Talk
Monday, September 8, 2025, 18:15–18:30, ZHG002
Characterization of Impedance-Matched Broadband Josephson Parametric Amplifier — •Maria-Teresa Handschuh1,2, Kedar E. Honasoge1,2, Florian Fesquet1,2, Simon Gandorfer1,2, Achim Marx1,2, Rudolf Gross1,2,3, and Kirill G. Fedorov1,2,3 — 1Walther-Meissner-Institute, 85748 Garching, Germany — 2School of Natural Sciences, Technische Universität München, 85748 Garching, Germany — 3Munich Center for Quantum Science and Technology, 80799 Munich, Germany
Josephson parametric amplifiers (JPAs) are essential tools in experiments involving superconducting quantum circuits due to their near quantum-limited performance. However, traditional JPAs suffer from narrow bandwidths and limited compression powers, which restricts their applicability in systems requiring broader frequency range and higher signal powers. In this talk, we present the design and characterization measurements of a broadband JPA that integrates an on-chip impedance-matching circuit based on two coupled resonators. Gain measurements reveal a spectral bandwidth enhancement of nearly two orders of magnitude, as compared to conventional JPAs. In addition, we present the noise performance across a wider frequency range, highlighting the amplifier’s suitability for advanced quantum applications.
Keywords: Superconducting Electronics