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Bolometric detection of Josephson inductance in a highly resistive environment

Author

Listed:
  • Diego Subero

    (Aalto University School of Science)

  • Olivier Maillet

    (Aalto University School of Science
    Université Paris-Saclay, CEA, CNRS, SPEC)

  • Dmitry S. Golubev

    (Aalto University School of Science)

  • George Thomas

    (Aalto University School of Science)

  • Joonas T. Peltonen

    (Aalto University School of Science)

  • Bayan Karimi

    (Aalto University School of Science
    University of Helsinki)

  • Marco Marín-Suárez

    (Aalto University School of Science)

  • Alfredo Levy Yeyati

    (Universidad Autonoma de Madrid)

  • Rafael Sánchez

    (Universidad Autonoma de Madrid)

  • Sunghun Park

    (Universidad Autonoma de Madrid)

  • Jukka P. Pekola

    (Aalto University School of Science)

Abstract

The Josephson junction is a building block of quantum circuits. Its behavior, well understood when treated as an isolated entity, is strongly affected by coupling to an electromagnetic environment. In 1983, Schmid predicted that a Josephson junction shunted by a resistance exceeding the resistance quantum RQ = h/4e2 ≈ 6.45 kΩ for Cooper pairs would become insulating since the phase fluctuations would destroy the coherent Josephson coupling. However, recent microwave measurements have questioned this interpretation. Here, we insert a small Josephson junction in a Johnson-Nyquist-type setup where it is driven by weak current noise arising from thermal fluctuations. Our heat probe minimally perturbs the junction’s equilibrium, shedding light on features not visible in charge transport. We find that the Josephson critical current completely vanishes in DC charge transport measurement, and the junction demonstrates Coulomb blockade in agreement with the theory. Surprisingly, thermal transport measurements show that the Josephson junction acts as an inductor at high frequencies, unambiguously demonstrating that a supercurrent survives despite the Coulomb blockade observed in DC measurements.

Suggested Citation

  • Diego Subero & Olivier Maillet & Dmitry S. Golubev & George Thomas & Joonas T. Peltonen & Bayan Karimi & Marco Marín-Suárez & Alfredo Levy Yeyati & Rafael Sánchez & Sunghun Park & Jukka P. Pekola, 2023. "Bolometric detection of Josephson inductance in a highly resistive environment," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-43668-3
    DOI: 10.1038/s41467-023-43668-3
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    References listed on IDEAS

    as
    1. Ivan V. Pechenezhskiy & Raymond A. Mencia & Long B. Nguyen & Yen-Hsiang Lin & Vladimir E. Manucharyan, 2020. "The superconducting quasicharge qubit," Nature, Nature, vol. 585(7825), pages 368-371, September.
    2. Olivier Maillet & Diego Subero & Joonas T. Peltonen & Dmitry S. Golubev & Jukka P. Pekola, 2020. "Electric field control of radiative heat transfer in a superconducting circuit," Nature Communications, Nature, vol. 11(1), pages 1-6, December.
    3. Matthias Meschke & Wiebke Guichard & Jukka P. Pekola, 2006. "Single-mode heat conduction by photons," Nature, Nature, vol. 444(7116), pages 187-190, November.
    4. Francesco Giazotto & María José Martínez-Pérez, 2012. "The Josephson heat interferometer," Nature, Nature, vol. 492(7429), pages 401-405, December.
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