Electrical drive of a Josephson junction array using a cryogenic BiCMOS pulse generator

Abstract:We have combined a cryogenic BiCMOS integrated circuit with a superconducting Josephson junction array. The BiCMOS circuit serves as an on-chip pulse generator delivering return-to-zero pulses with pulse frequencies of up to 15 GHz. With this microwave drive, we observe wide and flat Shapiro steps in the voltage-versus-current characteristics of the Josephson junction array. To the best of our knowledge, this is the first integration of a Josephson junction array with a cryogenic BiCMOS chip. Our results pave the way to a hybrid and fully integrated Josephson arbitrary waveform synthesizer with possible applications in quantum electronics and quantum voltage metrology.

Superconductivity (cond-mat.supr-con); Quantum Physics (quant-ph)

arXiv:2512.20367 [cond-mat.supr-con]

(or arXiv:2512.20367v2 [cond-mat.supr-con] for this version)

https://doi.org/10.48550/arXiv.2512.20367 Focus to learn more arXiv-issued DOI via DataCite

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