Flux-Tunable Dissipation for Superconducting Quantum Circuits

ORAL

Abstract

Circuit quantum electrodynamics is one of the most promising approaches for building a large-scale quantum computer. Despite the intensive research in the field, further development steps are still required to obtain this goal. Especially, fast initialization of qubits is beneficial for various error correction codes. Here, we experimentally demonstrate a flux-tunable environment that can potentially be used for qubit initialization [J. Tuorila, et al., npj Quantum Information 3, 27 (2017)]. Our system consists of two coupled resonators: one with a high quality factor, and the other with a low quality factor and a tunable resonance frequency achieved with a superconducting quantum interference device. We can tune the loaded quality factor of the system from above 105 down to a few thousand.

*We acknowledge financial support by European Research Council under Grant No. 681311 (QUESS), by the Academy of Finland, and by the Vilho, Yrjö and Kalle Väisälä Foundation.

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Presenters

  • Matti Partanen

    • QCD Labs, Department of Applied Physics, Aalto University
    • QCD Labs, Aalto University

Authors

  • Matti Partanen

    • QCD Labs, Department of Applied Physics, Aalto University
    • QCD Labs, Aalto University

  • Kuan Tan

    • QCD Labs, Department of Applied Physics, Aalto University
    • Department of applied physics, Aalto University

  • Shumpei Masuda

    • QCD Labs, Department of Applied Physics, Aalto University

  • Joonas Govenius

    • QCD Labs, Department of Applied Physics, Aalto University

  • Russell Lake

    • National Institute of Standards and Technology
    • NIST - Boulder
    • NIST
    • QCD Labs, Department of Applied Physics, Aalto University

  • Leif Grönberg

    • VTT Technical Research Centre of Finland Ltd

  • Juha Hassel

    • VTT Technical Research Centre of Finland Ltd

  • Slavomir Simbierowicz

    • VTT Technical Research Centre of Finland Ltd

  • Visa Vesterinen

    • VTT Technical Research Centre of Finland Ltd

  • Jani Tuorila

    • QCD Labs, Department of Applied Physics, Aalto University

  • Tapio Ala-Nissila

    • Departments of Mathematical Sciences and Physics, Loughborough University

  • Mikko Möttönen

    • QCD Labs, Department of Applied Physics, Aalto University
    • QCD Labs, Aalto University
    • Department of applied physics, Aalto University