Superconducting gatemon qubits based on selective-area-grown semiconductor materials

ORAL

Abstract

Semiconductor-superconductor hybrid gatemon qubits offer a promising path to large scale quantum processors. In contrast to conventional transmon qubits that are controlled using currents, gatemons allow complete control using only gate voltages [1], potentially alleviating challenges to scaling superconducting qubits [2]. Here, we present a novel approach to building gatemons utilizing selective-area-grown InAs structures on an InP substrate [3,4]. This approach allows deterministic placement and straightforward fabrication of the gatemon qubits. We characterize the material and perform first proof-of-principle measurements to demonstrate coherent qubit oscillations. Further work is needed to understand the dominant loss mechanisms and improve coherence times.

[1] Larsen et al., Phys. Rev. Lett. 115, 127001 (2015)
[2] Casparis et al., Nature Nanotechnology 13, 915–919 (2018)
[3] Krizek et al., Phys. Rev. Materials 2, 093401 (2018)
[4] Vaitiekenas et al., Phys. Rev. Lett. 121, 147701 (2018)

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Presenters

  • Albert Hertel

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

Authors

  • Albert Hertel

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

  • Laurits Orheim Andersen

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

  • Natalie Pearson

    Department of Physics, ETH Zurich, Theoretical Physics, ETH Zurich, Theoretische Physik, ETH Zürich, Zürich, Switzerland

  • Malcolm R Connolly

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

  • Valentina Zannier

    NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Pisa, Italy

  • Lucia Sorba

    NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Pisa, Italy

  • Liu Yu

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

  • Peter Krogstrup

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

  • Geoffrey C. Gardner

    Microsoft, Microsoft Quantum at Station Q Purdue, Purdue University, Microsoft Quantum at Station Q Purdue, Purdue University, West Lafayette, Indiana 47907, USA, Microsoft Station Q Purdue, Birck Nanotechnology Center, Purdue University, Department of Physics and Astronomy, Purdue University, Microsoft Quantum at Station Q Purdue, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA, Purdue University, Station Q Purdue

  • Michael Manfra

    Purdue University, Microsoft, Department of Physics and Astronomy and Station Q Purdue, Purdue University, Department of Physics and Astronomy, Purdue University, Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907 USA, Microsoft Station Q Purdue, Physics and Astronomy, Purdue University, Department of Physics and Astronomy, School of Materials Engineering and School of Electrical and Computer Engineering, Purdue University, Station Q Purdue and Department of Physics and Astronomy, Purdue University, Dept. of Physics, Purdue University, Department of Physics and Astronomy and Station Q Purdue, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA, Dept. of Physics and Astronomy, Purdue, Purdue University, Station Q Purdue, Department of Physics and Astronomy, Station Q Purdue, and Birck Nanotechnology Center, Purdue University

  • 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

  • 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