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A high-fidelity quantum matter-link between ion-trap microchip modules

Author

Listed:
  • M. Akhtar

    (University of Sussex
    Universal Quantum Ltd)

  • F. Bonus

    (Universal Quantum Ltd
    University College London)

  • F. R. Lebrun-Gallagher

    (University of Sussex
    Universal Quantum Ltd)

  • N. I. Johnson

    (University of Sussex)

  • M. Siegele-Brown

    (University of Sussex)

  • S. Hong

    (University of Sussex)

  • S. J. Hile

    (University of Sussex)

  • S. A. Kulmiya

    (University of Sussex
    University of Bristol)

  • S. Weidt

    (University of Sussex
    Universal Quantum Ltd)

  • W. K. Hensinger

    (University of Sussex
    Universal Quantum Ltd)

Abstract

System scalability is fundamental for large-scale quantum computers (QCs) and is being pursued over a variety of hardware platforms. For QCs based on trapped ions, architectures such as the quantum charge-coupled device (QCCD) are used to scale the number of qubits on a single device. However, the number of ions that can be hosted on a single quantum computing module is limited by the size of the chip being used. Therefore, a modular approach is of critical importance and requires quantum connections between individual modules. Here, we present the demonstration of a quantum matter-link in which ion qubits are transferred between adjacent QC modules. Ion transport between adjacent modules is realised at a rate of 2424 s−1 and with an infidelity associated with ion loss during transport below 7 × 10−8. Furthermore, we show that the link does not measurably impact the phase coherence of the qubit. The quantum matter-link constitutes a practical mechanism for the interconnection of QCCD devices. Our work will facilitate the implementation of modular QCs capable of fault-tolerant utility-scale quantum computation.

Suggested Citation

  • M. Akhtar & F. Bonus & F. R. Lebrun-Gallagher & N. I. Johnson & M. Siegele-Brown & S. Hong & S. J. Hile & S. A. Kulmiya & S. Weidt & W. K. Hensinger, 2023. "A high-fidelity quantum matter-link between ion-trap microchip modules," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-022-35285-3
    DOI: 10.1038/s41467-022-35285-3
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