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)

*This work was supported by Microsoft, the U.S. Army Research Office, and the Danish National Research Foundation.

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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