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Coherent coupling between a quantum dot and a donor in silicon

Author

Listed:
  • Patrick Harvey-Collard

    (Université de Sherbrooke
    Sandia National Laboratories)

  • N. Tobias Jacobson

    (Center for Computing Research, Sandia National Laboratories)

  • Martin Rudolph

    (Sandia National Laboratories)

  • Jason Dominguez

    (Sandia National Laboratories)

  • Gregory A. Ten Eyck

    (Sandia National Laboratories)

  • Joel R. Wendt

    (Sandia National Laboratories)

  • Tammy Pluym

    (Sandia National Laboratories)

  • John King Gamble

    (Center for Computing Research, Sandia National Laboratories)

  • Michael P. Lilly

    (Center for Integrated Nanotechnologies, Sandia National Laboratories)

  • Michel Pioro-Ladrière

    (Université de Sherbrooke
    Quantum Information Science Program, Canadian Institute for Advanced Research)

  • Malcolm S. Carroll

    (Sandia National Laboratories)

Abstract

Individual donors in silicon chips are used as quantum bits with extremely low error rates. However, physical realizations have been limited to one donor because their atomic size causes fabrication challenges. Quantum dot qubits, in contrast, are highly adjustable using electrical gate voltages. This adjustability could be leveraged to deterministically couple donors to quantum dots in arrays of qubits. In this work, we demonstrate the coherent interaction of a 31P donor electron with the electron of a metal-oxide-semiconductor quantum dot. We form a logical qubit encoded in the spin singlet and triplet states of the two-electron system. We show that the donor nuclear spin drives coherent rotations between the electronic qubit states through the contact hyperfine interaction. This provides every key element for compact two-electron spin qubits requiring only a single dot and no additional magnetic field gradients, as well as a means to interact with the nuclear spin qubit.

Suggested Citation

  • Patrick Harvey-Collard & N. Tobias Jacobson & Martin Rudolph & Jason Dominguez & Gregory A. Ten Eyck & Joel R. Wendt & Tammy Pluym & John King Gamble & Michael P. Lilly & Michel Pioro-Ladrière & Malco, 2017. "Coherent coupling between a quantum dot and a donor in silicon," Nature Communications, Nature, vol. 8(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-01113-2
    DOI: 10.1038/s41467-017-01113-2
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    Cited by:

    1. Holly G. Stemp & Serwan Asaad & Mark R. van Blankenstein & Arjen Vaartjes & Mark A. I. Johnson & Mateusz T. Mądzik & Amber J. A. Heskes & Hannes R. Firgau & Rocky Y. Su & Chih Hwan Yang & Arne Laucht , 2024. "Tomography of entangling two-qubit logic operations in exchange-coupled donor electron spin qubits," Nature Communications, Nature, vol. 15(1), pages 1-10, 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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