Regensburg 2022 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 37: Superconducting Electronics: SQUIDs, Qubits, Circuit QED

TT 37.2: Vortrag

Freitag, 9. September 2022, 09:45–10:00, H22

Development of a three-wave-mixing Josephson traveling-wave parametric amplifier — •Victor Gaydamachenko¹, Christoph Kissling^1,2, Lukas Grünhaupt¹, Ralf Dolata¹, and Alexander B. Zorin¹ — ¹Physikalisch-Technische Bundesanstalt, Braunschweig, Germany — ²Technische Universität Ilmenau, Germany

Modern quantum experiments profit from wideband amplification of small microwave signals with noise approaching the quantum-limit. A promising approach to design an amplifier having a bandwidth of several GHz, power gain of 20 dB, and quantum-limited noise are traveling-wave parametric amplifiers (TWPAs). We develop a Josephson traveling-wave parametric amplifier (JTWPA), based on a series array of 1500 rf-SQUIDs, and utilising the three-wave mixing regime. One of the main challenges of TWPAs is power leakage to unwanted processes like the generation of higher harmonics and mixing products, which significantly limit the gain. To solve this obstacle, we apply a dispersion engineering technique. Here, we present numerically optimised parameter sets for practical realisation of our concept. Simulations of the device operation show a signal gain of 20 dB in the frequency range from 3 GHz to 9 GHz.