Hybrid rf SQUID qubit based on high kinetic inductance

J. T. Peltonen*, P. C.J.J. Coumou, Z. H. Peng, T. M. Klapwijk, J. S. Tsai, O. V. Astafiev

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    22 Citations (Scopus)
    45 Downloads (Pure)


    We report development and microwave characterization of rf SQUID (Superconducting QUantum Interference Device) qubits, consisting of an aluminium-based Josephson junction embedded in a superconducting loop patterned from a thin film of TiN with high kinetic inductance. Here we demonstrate that the systems can offer small physical size, high anharmonicity, and small scatter of device parameters. The work constitutes a non-tunable prototype realization of an rf SQUID qubit built on the kinetic inductance of a superconducting nanowire, proposed in Phys. Rev. Lett. 104, 027002 (2010). The hybrid devices can be utilized as tools to shed further light onto the origin of film dissipation and decoherence in phase-slip nanowire qubits, patterned entirely from disordered superconducting films.

    Original languageEnglish
    Article number10033
    Number of pages8
    JournalScientific Reports
    Issue number1
    Publication statusPublished - 2018


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