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Coherent multiqubit operations in a six quantum dot linear array

ORAL

Abstract

Spin qubits are one of the promising candidates to build a large-scale solid-state quantum computer. These qubits are given by the spin state of a single electron confined in a quantum dot. Spin qubits are attractive because they can be operated with relatively high fidelity [1,2] and are compatible with the current CMOS industry standards [3]. In this presentation we will show the first silicon qubit system that achieves universal control beyond 2 qubits [4,5]. We will also discuss the challenges of operating a multi-qubit system, including crosstalk phenomena when driving multiple qubits at the same time, novel ways of entangling qubits and the engineering efforts involved.

[1] Yoneda, Jun, et al., Nature nanotechnology (2018)
[2] Huang, W., et al. , Nature (2019)
[3] Vandersypen, L. M. K., et al., NPJ Quantum Information (2017)
[4] Watson, T. F., et al., Nature (2018)
[5] Zajac, D. M., et al., Science (2018)

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Presenters

  • Stephan Philips

    Delft University of Technology, Qutech, Delft University of Technology

Authors

  • Stephan Philips

    Delft University of Technology, Qutech, Delft University of Technology

  • Mateusz T Madzik

    Delft University of Technology, QuTech, Delft University of Technology, Univ of New South Wales

  • Maximilian Russ

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

  • Sergei Amitonov

    Delft University of Technology, QuTech, Delft University of Technology

  • Delphine Brousse

    TNO, QuTech, Delft University of Technology

  • Amir Sammak

    QuTech and Netherlands Organisation for Applied Scientific Research (TNO), TNO, QuTech, Delft University of Technology, Netherlands Organization for Applied Scientific Research (TNO), Delft University of Technology

  • Giordano Scappucci

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

  • Lieven Vandersypen

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