Development of Superconducting Qubit Circuits to Coherently Probe Majorana Zero Modes Part II: Experimental Results

ORAL

Abstract

A proximitized semiconducting nanowire (NW) with high spin-orbit coupling is one of the most promising candidate systems to achieve a topologically protected qubit. Several proposals for achieving such a qubit use proximitized superconducting islands connected via gate-tunable Josephson junctions [1,2]. When two such islands are tuned to the topological regime the hybridization of the Majorana zero modes at the junction give rise to the fractional Josephson coupling. This additional coupling shows as additional features in the transition spectrum.
Here we perform microwave spectroscopy of NW island-devices with low charging energy using a superconducting λ/2 coplanar waveguide resonator. We study microwave transitions in the presence of in-plane fields large enough to enter the topological regime.

References:
[1] E. Ginossar et al., Nat. Commun, 5, 4772 (2014)
[2] D. Aasen et al, Phys. Rev. X, 6, 031016 (2016)

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Presenters

  • Willemijn Uilhoorn

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

Authors

  • Willemijn Uilhoorn

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

  • Anders Kringhøj

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

  • James Kroll

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

  • Lucas Casparis

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

  • Thorvald Larsen

    Center for Quantum Devices, Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen, University of Copenhagen, Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute

  • Bernard Van Heck

    Station Q, Microsoft Research

  • Tim Stegwee

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

  • Robert McNeil

    Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute

  • Marina Hesselberg

    Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute, Center for Quantum Devices, Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen

  • Oscar Erlandsson

    Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute, Center for Quantum Devices, Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen

  • Jesper Nygard

    Center for quantum devices, Niels Bohr Institute, Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute, Center for Quantum Devices and Station-Q Copenhagen, Niels Bohr Institute, University of Copenhagen, Center for Quantum Devices, Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen, Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen, Center of Quantum Devices and Nano-Science Center, Niels Bohr Institute, University of Copenhagen

  • Peter Krogstrup

    Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute, Center for Quantum Devices and Station-Q Copenhagen, Niels Bohr Institute, University of Copenhagen, Center for Quantum Devices, Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen, University of Copenhagen

  • Karl Petersson

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

  • Gijs de Lange

    Station Q Delft, Microsoft

  • Charles Marcus

    Center for Quantum Devices and Microsoft Station Q Copenhagen, Niels Bohr Institute, Center for Quantum Devices, Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen, Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen, Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute, Niels Bohr Institute, Univ of Copenhagen, Univ of Copenhagen, University of Copenhagen

  • Leo Kouwenhoven

    Microsoft Station-Q Delft, Delft University of Technology, Delft Univ of Tech, Qutech and Kavli Institute of Nanoscience and Microsoft Station Q Delft, Delft University of Technology, QuTech, Kavli Institute of Nanoscience, Station Q at Delft University of Technology, Delft University of Technology, Microsoft Station-Q at Delft University of Technology, Delft Univ. of Technology, Microsoft Station Q, Station Q Delft, Microsoft, Microsoft Station Q