Little-Parks effect in a semiconducting nanowire-based superconducting qubit with in-situ switching between transport and cQED

ORAL

Abstract

Proximitized semiconducting nanowires serve as a promising platform for both superconducting qubits [1] and topological qubits based on Majorana zero modes (MZM) [2,3]. Here we demonstrate in-situ switching between coherent cQED measurements and transport measurements based on a full-shell nanowire using a Josephson junction as a gate tuneable switch. These field-compatible devices show flux-dependent lobe spectra in both transport and cQED measurements associated with the Little-Parks effect. Coherent operations are performed both around zero applied field and around 90 mT, corresponding to one flux quantum being threaded through the wire, with a destructive regime in between.
This opens the possibility of detecting the presence of MZMs in one-flux-quantum regime by cQED measurements.

[1] Larsen et. al. Phys. Rev. Lett. 115, 127001 (2015)
[2] Lutchyn et. al. arXiv:1809.05512 (2018)
[3] Vaitiekenas et. al. arXiv:1809.05513 (2018)

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Presenters

  • Anders Kringhøj

    Niels Bohr Institute, Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark

Authors

  • Anders Kringhøj

    Niels Bohr Institute, Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark

  • Thorvald W Larsen

    Niels Bohr Insitute, Univ of Copenhagen, Niels Bohr Institute, Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark

  • Oscar Erlandsson

    Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark

  • Deividas Sabonis

    Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark, University of Copenhagen

  • Bernard Van Heck

    Microsoft, Microsoft Station Q, UCSB, Microsoft Station Q, Microsoft Quantum, Station Q, Microsoft Corp, Microsoft Station Q Santa Barbara, Station Q, Microsoft Research, Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark and Microsoft Quantum, Microsoft Sta, Station Q, Microsoft

  • Ivana Petkovic

    Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark

  • Robert P. G. McNeil

    Niels Bohr Institute, University of Copenhagen, Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark

  • Marina Hesselberg

    Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark

  • Agnieszka Telecka

    Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark

  • Sachin Yadav

    Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark

  • Karolis Parfeniukas

    Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark

  • Karthik Jambunathan

    Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark

  • Peter Krogstrup

    Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark, Station Q Lyngby, Microsoft, Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Center For Quantum Devices and Microsoft Quantum Materials Lab - Copenhagen, Niels Bohr Institute, University of Copenhagen

  • Lucas Casparis

    Microsoft, Niels Bohr Institute, Univ of Copenhagen, Niels Bohr Institute, Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark, Microsoft Quantum Research, Copenhagen

  • Charles M Marcus

    Microsoft, Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen, Center for Quantum Devices, University of Copenhagen, Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark, Center for Quantum Devices and Microsoft Quantum Lab--Copenhagen, Niels Bohr Institute, University of Copenhagen, Niels Bohr Institute, University of Copenhagen, Niels Bohr Institute, Center for Quantum Devices, Niels Bohr Institute, Center for Quantum Devices, Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen, Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark, University of Copenhagen, Center for Quantum Devices and Station Q Copenhagen, University of Copenhagen

  • Karl D Petersson

    Niels Bohr Institute, Center for Quantum Devices, Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen, Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark, University of Copenhagen, Microsoft Corp, Microsoft Quantum Research, Copenhagen