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Single-electron operations in a foundry-fabricated array of quantum dots

Author

Listed:
  • Fabio Ansaloni

    (University of Copenhagen)

  • Anasua Chatterjee

    (University of Copenhagen)

  • Heorhii Bohuslavskyi

    (University of Copenhagen)

  • Benoit Bertrand

    (LETI)

  • Louis Hutin

    (LETI)

  • Maud Vinet

    (LETI)

  • Ferdinand Kuemmeth

    (University of Copenhagen)

Abstract

Silicon quantum dots are attractive for the implementation of large spin-based quantum processors in part due to prospects of industrial foundry fabrication. However, the large effective mass associated with electrons in silicon traditionally limits single-electron operations to devices fabricated in customized academic clean rooms. Here, we demonstrate single-electron occupations in all four quantum dots of a 2 x 2 split-gate silicon device fabricated entirely by 300-mm-wafer foundry processes. By applying gate-voltage pulses while performing high-frequency reflectometry off one gate electrode, we perform single-electron operations within the array that demonstrate single-shot detection of electron tunneling and an overall adjustability of tunneling times by a global top gate electrode. Lastly, we use the two-dimensional aspect of the quantum dot array to exchange two electrons by spatial permutation, which may find applications in permutation-based quantum algorithms.

Suggested Citation

  • Fabio Ansaloni & Anasua Chatterjee & Heorhii Bohuslavskyi & Benoit Bertrand & Louis Hutin & Maud Vinet & Ferdinand Kuemmeth, 2020. "Single-electron operations in a foundry-fabricated array of quantum dots," Nature Communications, Nature, vol. 11(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-20280-3
    DOI: 10.1038/s41467-020-20280-3
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    Cited by:

    1. W. I. L. Lawrie & M. Rimbach-Russ & F. van Riggelen & N. W. Hendrickx & S. L. de Snoo & A. Sammak & G. Scappucci & J. Helsen & M. Veldhorst, 2023. "Simultaneous single-qubit driving of semiconductor spin qubits at the fault-tolerant threshold," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    2. Elliot J. Connors & J. Nelson & Lisa F. Edge & John M. Nichol, 2022. "Charge-noise spectroscopy of Si/SiGe quantum dots via dynamically-decoupled exchange oscillations," Nature Communications, Nature, vol. 13(1), pages 1-9, December.

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