Quickly Tunable Refrigerator for Superconducting Quantum Circuits

ORAL

Abstract

In the past decade, the research on superconducting quantum circuits has provided a great number of superior microwave components such as superconducting qubits, amplifiers, and sensors. Especially in the opertation of qubits, it is of utmost importance to be able to quickly remove any unwanted qubit excitations on demand for fast and accurate initialization. Furthermore, a reduction of excess photon population in qubit-coupled resonators is important in tackling shot-noise-induced dephasing. To this end, we recently introduced a device referred to as a quantum-circuit rerigerator [K. Y. Tan, et al., Nat. Commun. 8, 15189 (2017)]. It is a stand-alone component that can be integrated with most superconducting quantum electric devices without major compromises in their other design criteria. In our experiments, we show how we can tune the dissipation of a superconducting resonator by orders of magnitude just by applying a bias voltage on the refrigerator. The time scale for switching the dissipation on and off is in the nanosecond range. We also observe a tunable Lamb shift owing to the dissipation induced by the refrigirator.

*We acknowledge financial support by European Research Council under Grant No. 681311 (QUESS) and by the Academy of Finland.

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Presenters

  • Mikko Möttönen

    • QCD Labs, Department of Applied Physics, Aalto University

Authors

  • 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

  • Jan Goetz

    • Walther-Meißner-Institut & TU München
    • QCD Labs, Aalto University
    • QCD Labs, Department of Applied Physics, Aalto University

  • Matti Partanen

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

  • Dibyendu Hazra

    • PHELIQS, CEA Grenoble
    • QCD Labs, Aalto University
    • QCD Labs, Department of Applied Physics, Aalto University

  • Eric Hyyppä

    • 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

  • Visa Vesterinen

    • VTT Technical Research Centre of Finland Ltd

  • 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

  • Marton Gunyho

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

  • Aarne Keränen

    • QCD Labs, Department of Applied Physics, Aalto University

  • Jani Tuorila

    • QCD Labs, Department of Applied Physics, Aalto University

  • Tapio Ala-Nissila

    • Departments of Mathematical Sciences and Physics, Loughborough University

  • Matti Silveri

    • Research Unit of Nano and Molecular Systems, University of Oulu
    • QCD Labs, Department of Applied Physics, Aalto University

  • Hermann Grabert

    • Department of Physics, University of Freiburg

  • Mikko Möttönen

    • QCD Labs, Department of Applied Physics, Aalto University