Hybrid rf SQUID qubit based on high kinetic inductance

Research output: Contribution to journalArticle


  • Joonas Peltonen

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

Research units

  • Delft University of Technology
  • Hunan Normal University
  • Moscow State Pedagogical University
  • Tokyo University of Science
  • Royal Holloway University of London
  • National Physical Laboratory
  • Moscow Institute of Physics and Technology


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
Pages (from-to)1-8
JournalScientific Reports
Issue number1
Publication statusPublished - 1 Dec 2018
MoE publication typeA1 Journal article-refereed

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