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

• URL: http://arxiv.org/abs/2203.14062v3
• Date: Sun, 20 Nov 2022 06:04:56 GMT
• Title: A high-fidelity quantum matter-link between ion-trap microchip modules
• Authors: M. Akhtar, F. Bonus, F. R. Lebrun-Gallagher, N. I. Johnson, M. Siegele-Brown, S. Hong, S. J. Hile, S. A. Kulmiya, S. Weidt and W. K. Hensinger
• Abstract summary: We present a quantum matter-link in which ion qubits are transferred between adjacent quantum computing modules. We show that the link does not measurably impact the phase coherence of the qubit. Our work will facilitate the implementation of QCs capable of fault-tolerant utility-scale quantum computation.
• Score: 0.10835042482545287
• License: http://creativecommons.org/licenses/by/4.0/
• 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 $7\times10^{-8}$. 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.

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