Tunable Josephson Generator for Qubit Excitation and Two‐Tone Spectroscopy

Khrenov, M.M.; Yusupov, R.D.; Gubochkin, G.I.; Vozhakov, V.A.; Nazhestkin, I.A.; Belanovsky, A.D.; Ionin, A.S.; Gladilovich, P.A.; Khismatullin, G.S.; Filippenko, L.V.; Fominskii, M.Y.; Koshelets, V.P.; Kupriyanov, M.Y.; Ryazanov, V.V.; Maleeva, N.; Klenov, N.V.; Soloviev, I.I.; Yakovlev, D.S.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 23 января 2026 г.

Авторы: Khrenov M.M., Yusupov R.D., Gubochkin G.I., Vozhakov V.A., Nazhestkin I.A., Belanovsky A.D., Ionin A.S., Gladilovich P.A., Khismatullin G.S., Filippenko L.V., Fominskii M.Y., Koshelets V.P., Kupriyanov M.Yu, Ryazanov V.V., Maleeva N., Klenov N.V., Soloviev I.I., Yakovlev D.S.
Журнал: Advanced Quantum Technologies
Год издания: 2025
Издательство: John Wiley & Sons, Inc.
Местоположение издательства: Hoboken, NJ, United States
Номер статьи: e00659
DOI: 10.1002/qute.202500659
Аннотация: We present a tunable Josephson generator that enables direct qubit excitation and two-tone spectroscopy while reducing cryogenic wiring complexity and thermal load. The device consists of a current-biased Josephson junction integrated with a superconducting spiral resonator, forming a microwave source that operates at cryogenic temperatures. Unlike conventional qubit drive setups that require coaxial microwave lines from room temperature to the base stage, our system requires only a single direct current (DC) bias line from room temperature. The generated microwave signal is delivered to the qubit via a short coaxial line between the 4 K and 20 mK stages, significantly reducing wiring complexity, thermal load in the cryostat and leveraging unused volume at the 4 K stage. We demonstrate continuous-wave excitation of a superconducting qubit and perform tunable two-tone spectroscopy using the Josephson generator as the drive source, resolving qubit spectra with performance comparable to a standard microwave source. Our generator is characterized by low phase noise and can be phase-locked to an external reference for enhanced stability. Operating at 4 K temperature, this self-contained source offers a low-noise, space-efficient solution for qubit control and spectroscopy, paving the way for scalable cryogenic quantum control architectures.
Добавил в систему: Нажесткин Иван Андреевич

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Tunable Josephson Generator for Qubit Excitation and Two‐Tone Spectroscopyстатья

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