APS Logo

Time-resolved measurement of quaiparticle tunneling between two Andreev levels in quantum dots

ORAL

Abstract

We investigate a triple-quantum-dot InAs nanowire device. The central dot is proximitized by a superconducting aluminum shell. The superconducting proximity effect indirectly leads to a formation of Andreev levels in the two normal end dots, located 2 μm apart. By means of radio-frequency dispersive sensing we measure individual quasiparticle jumps between those two Andreev levels separated by a hard-gapped superconducting island. We discuss whether the quasiparticle jumps originate from coherent tunneling or from quasiparticle poisoning, and the implications for the qubits based on hybrid super-semiconducting nanowires.

–

Presenters

  • Filip Malinowski

    Delft University of Technology, QuTech and Kavli Institute of Nanoscience, Delft University of Technology, QuTech, Delft University of Technology

Authors

  • Filip Malinowski

    Delft University of Technology, QuTech and Kavli Institute of Nanoscience, Delft University of Technology, QuTech, Delft University of Technology

  • Damaz De Jong

    Delft University of Technology, QuTech and Kavli Institute of Nanoscience, Delft University of Technology, QuTech, Delft University of Technology

  • Lin Han

    Delft University of Technology, Drexel University, School of biomedical Engineering, QuTech and Kavli Institute of Nanoscience, Delft University of Technology, QuTech, Delft University of Technology

  • Christian Prosko

    Delft University of Technology, QuTech and Kavli Institute of Nanoscience, Delft University of Technology, QuTech, Delft University of Technology

  • Yu Liu

    Niels Bohr Institute, University of Copenhagen, Microsoft Quantum Materials Lab, University of Copenhagen, Niels Bohr Institute

  • Peter Krogstrup

    Center for Quantum Devices and Microsoft Quantum Lab Copenhagen, Niels Bohr Institute, University of Copenhagen, Microsoft Quantum Materials Lab and Center for Quantum Devices, Niels Bohr Institute,8University of Copenhagen, Kanalvej 7, 2800 Kongens Lyngby, Denmark, Niels Bohr Institute, University of Copenhagen, Quantum Materials Lab Copenhagen, Microsoft, University of Copenhagen, Center for Quantum Devices and Microsoft Quantum Lab Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark, Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Microsoft Quantum Materials Lab, University of Copenhagen, Niels Bohr Institute, Copenhagen, Niels Bohr Institute

  • Leo Kouwenhoven

    Microsoft Quantum Lab Delft, Delft University of Technology, Delft University of Technology, Quantum Labs Delft, Microsoft, Microsoft Quantum Lab Delft, Quantum Lab Delft, Microsoft, Microsoft Corp

  • Jonne Koski

    Microsoft Quantum Lab Delft