Bolometer operating at the threshold for circuit quantum electrodynamics

ORAL

Abstract

Bolometers operating at low temperatures are promising for detection of itinerant microwave photons and qubit readout. They benefit from a broad detection bandwidth and low dissipation. However, single-microwave-photon sensitivity has not been achieved yet. To address this issue, we experimentally demonstrate an ultrafast bolometer based on a graphene Josephson junction and operating at the threshold of circuit quantum electrodynamics [1]. Graphene, with its unusual thermal properties, offers the opportunity to reach the single-microwave-photon regime. Our device yields a noise equivalent power of 30 zW/rtHz at a thermal time constant of 500 ns and an extracted energy resolution of h×30 GHz.

[1] R. Kokkoniemi et al., Bolometer operating at the threshold for circuit quantum electrodynamics, Nature, 586, 47-51 (2020)

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Presenters

  • Jean-Philippe Girard

    QCD Labs, Aalto University

Authors

  • Roope Kokkoniemi

    QCD Labs, Aalto University, IQM Finland Oy

  • Jean-Philippe Girard

    QCD Labs, Aalto University

  • Dibyendu Hazra

    QCD Labs, Aalto University

  • Antti Laitinen

    QCD Labs, Aalto University, Aalto University

  • Joonas Govenius

    QCD Labs, Aalto University, VTT Technical Research Centre of Finland Ltd, VTT Micro & Nanoelectronics

  • Russell Lake

    QCD Labs, Aalto University, Bluefors Oy

  • Iiro Sallinen

    QCD Labs, Aalto University

  • Visa Vesterinen

    VTT, VTT Micro & Nanoelectronics, VTT Techical Research Center of Finland Ltd., VTT Technical Research Centre of Finland Ltd

  • Matti Partanen

    QCD Labs, Aalto University, Walther-Meißner-Institut, Bavarian Academy of Sciences and Humanities, Walther-Meißner-Institut, Technische Universität München, Walther-Meißner-Institute, Bavarian Academy of Sciences and Humanities & Physik-Department, Technische Universität München, Germany, QCD Labs, Department of Applied Physics, Aalto University

  • J. Y. Tan

    National University of Singapore

  • Kok Wai Chan

    National University of Singapore, IQM Finland Oy

  • Kuan Yen Tan

    QCD Labs, Aalto University, IQM Quantum Computers, Quantum Engineer, IQM Finland Oy, IQM Finland Oy

  • Pertti Juhani Hakonen

    QCD Labs, Aalto University, Aalto University

  • Mikko Möttönen

    QCD Labs, Aalto University, QCD Labs, Department of Applied Physics, Aalto University, IQM Finland Oy