Towards a silicon-based eight-qubit cloud quantum computer

ORAL

Abstract

Quantum Inspire is a cloud platform giving public access to quantum computers based on superconducting and semiconducting qubits. The semiconductor quantum processor is an eight-qubit device based on electron spins in silicon. We electrostatically define a linear array of eight quantum dots on low-disorder 28Si/SiGe heterostructures (1-3). We utilize a Pauli spin blockade (PSB)-readout using two additional charge sensors, a micromagnet-enabled electric-dipole spin resonance (EDSR) for single-qubit gates, and a two-qubit controlled-phase (CZ) gate. We perform automated calibrations ranging from tuning the charge sensor to compensating for qubit crosstalk—necessary for keeping our spin-qubit processor online. We present the latest results on the functionality and the performance of our system which will be made freely accessible to everyone.

(1) S. G. J. Philips et al. Universal control of a six-qubit quantum processor in silicon. Nature 609, 919 (2022)

(2) M. De Smet et al. High-fidelity single-spin shuttling in silicon. arXiv:2406.07267 (2024)

(3) D. D. Esposti et al. Low disorder and high valley splitting in silicon. npj Quantum Inf 10, 32 (2024)

*This work was supported by the Dutch National Growth Fund (NGF), aspart of the Quantum Delta NL programme and by the European Union’sHorizon 2020 research and innovation programme under the GrantAgreement No.951852 (QLSI project).

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Presenters

  • Tumi Makinwa

    • TNO and Qutech

Authors

  • Tumi Makinwa

    • TNO and Qutech

  • Pieter T Eendebak

    • TNO and Qutech

  • Jasper Franse

    • TNO and Qutech

  • Önder Gül

    • TNO and Qutech

  • Carles E Boncompte

    • TNO and Qutech

  • Nienke Ten Haaf

    • TNO and Qutech

  • Jacob Dalle

    • TNO and Qutech

  • Rick N. M Wasserman

    • TNO and Qutech

  • Gertjan Eenink

    • TNO and Qutech

  • David J Michalak

    • TNO

  • Harold B Meerwaldt

    • TNO and Qutech

  • Daniël van der Velde

    • Qutech and TU Delft

  • Michiel Haye

    • TNO and Qutech

  • Napoleon C Bolanos

    • TNO and Qutech

  • Fabien Rortais

    • TNO and Qutech

  • Karim Elkholy

    • TNO

  • Daniel Naron

    • TNO

  • Andres S Saavedra

    • TNO and Qutech

  • Luca Mazzarella

    • TNO and Qutech

  • Sander de Snoo

    • QuTech
    • QuTech, TU Delft
    • Qutech and TU delft

  • Giordano Scappucci

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

  • Jasper Winters

    • TNO and Qutech

  • Lieven M Vandersypen

    • Delft University of Technology

  • Richard Versluis

    • QuTech and Netherlands Organization for Applied Scientific Research (TNO)