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TT: Fachverband Tiefe Temperaturen

TT 38: Superconducting Electronics: SQUIDs, Qubits, Circuit QED I

TT 38.5: Talk

Wednesday, March 19, 2025, 17:45–18:00, H32

Towards superconducting quantum-accurate arbitrary waveform generators for microwave frequencies — •Michael Haas, Abdulrahman Widaa, Oliver Kieler, Shekhar Priyadarshi, Marco Kraus, Ralf Behr, Johannes Kohlmann, and Mark Bieler — Physikalisch Technische Bundesanstalt, Braunschweig, Germany

The Josephson Arbitrary Waveform Synthesizer (JAWS) consists of an array of Josephson Junctions being driven by electrical pulses to produce quantum-accurate output signals with high spectral purity and low noise [1]. It has been subject of research for many years and is well established at output frequencies in the kHz and low MHz range. However, the extension to GHz frequencies, which could prove to be very important for quantum applications and metrology, has just recently started [2, 3]. This effort requires completely new circuit designs. Moreover, at high frequencies part of the input signal is fed through to the output signal and it is essential to accurately determine and minimize this so-called feedthrough error. We will present the status of the GHz-JAWS development at PTB, including new approaches to circuit design and feedthrough reduction.

[1] O. Kieler, Encyclopedia of Condensed Matter Physics, 2e 1 Oxford: Elsevier (2024). DOI: 10.1016/B978-0-323-90800-9.00001-9

[2] C. Donnelly et al., IEEE Trans. Appl. Supercond. 30 (2020). DOI: 10.1109/TASC.2019.2932342

[3] A. Babenko et al., IEEE Trans. Appl. Supercond. 32 (2022). DOI: 10.1109/TASC.2022.3201188

Keywords: Josephson Junction; JAWS; Microwave; Diplexer; Wafeform Generator