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arXiv · 2603.12327

A Traveling-Wave Parametric Amplifier With Integrated Diplexers

C. Denney·K. Genter·K. Cicak·J. D. Teufel·J. Aumentado·F. Lecocq·M. Malnou
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Abstract

Traveling-Wave Parametric Amplifiers (TWPAs) are ubiquitous in superconducting circuit readout, providing high gain with near-quantum-limited noise performance across a wide bandwidth. Their operation, however, relies on a strong microwave pump tone that is typically delivered using off-chip passive components, such as directional couplers or diplexers. These external elements add loss, increase system complexity, and limit scalability. Here, we present a traveling-wave parametric amplifier that incorporates on-chip input and output diplexers for pump routing. This co-fabricated architecture offers a compact and scalable solution for superconducting-circuit readout.

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C. Denney, K. Genter, K. Cicak, J. D. Teufel, J. Aumentado, F. Lecocq, M. Malnou. 2026-03-12. A Traveling-Wave Parametric Amplifier With Integrated Diplexers. https://arxiv.org/abs/2603.12327

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