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Andreev Interferometers based on Quantum Point Contacts

ORAL

Abstract

Two dimensional systems proximitized with superconductors have been demonstrated to serve as versatile platform for studying Andreev physics. Here, we create several superconducting interferometers involving two planar Josephson junctions. We probe the limits of balancing such a circuit – that is minimizing the difference of their respective Andreev energies – in addition to demonstrating a dynamic and reversible superconducting diode effect. We compare these results to a simple model that highlights the contribution from high channel transparencies as well as its impact on the higher Josephson harmonics.

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Presenters

  • José Chávez-Garcia

    Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen

Authors

  • José Chávez-Garcia

    Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen

  • Smitha Nair

    Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen

  • Asbjørn Drachmann

    Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen

  • Sangeeth Kallatt

    Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen

  • Rasmus Christensen

    Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen

  • Sergei Gronin

    Department of Physics and Astronomy, Birck Nanotechnology Center, Purdue University

  • Geoff C Gardner

    Purdue University, Materials Engineering, Purdue University, Department of Physics and Astronomy, Birck Nanotechnology Center, Purdue University

  • Michael J Manfra

    Purdue University, Microsoft Quantum Purdue, Purdue University, Birck Nanotechnology Center, Purdue University, West Lafayette, IN, USA; Microsoft Quantum Lab, Purdue University, West Lafayette, IN, USA, Physics and Astronomy, Purdue University, Department of Physics and Astronomy, Birck Nanotechnology Center, School of Electrical and Computer Engineering and Microsoft Quantum Lab West Lafayette, Purdue University, Department of Physics and Astronomy and Nanotechnology Center Purdue University, Microsoft Quantum Lab West Lafayette, Department of Physics and Astronomy, Birck Nanotechnology Center, School of Materials Engineering and School of Electrical and Computer Engineering, Purdue University

  • Constantin Schrade

    Univ of Copenhagen, Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen

  • Charles Marcus

    Univ of Copenhagen, University of Copenhagen, Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen

  • Morten Kjaergaard

    University of Copenhagen, Massachusetts Institute of Technology MIT, Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen