发表机构
Technical University of Munich; MQSC GmbH; Software Competence Center Hagenberg GmbH (SCCH)（慕尼黑工业大学; MQSC有限公司; 哈根贝格软件能力中心有限公司）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
针对量子电荷耦合器件架构中离子穿梭导致传统动力学去耦失效的问题，提出穿梭感知动力学去耦编译器，可提高退相位主导下的量子计算最终态保真度。
AI 中文摘要
动力学去耦（DD）通过精心定时的重聚焦脉冲抑制退相位噪声，有助于维持高保真度量子计算。然而在量子电荷耦合器件（QCCD）架构中，离子会在器件中穿梭，这一输运过程会限制脉冲的施加时机，并影响离子积累的相位。传统DD方法未考虑穿梭过程，因此可能会安排必须在输运调度后省略或移位的脉冲，削弱对退相位的保护。为此，我们提出了穿梭感知动力学去耦（SADD），这是一种离线编译器 passes，可在保留逻辑门定时和总调度长度的同时，联合选择重聚焦脉冲和局部离子重新路由。在基准模拟中，当退相位主导控制和输运误差，且变化足够缓慢以适配DD时，SADD相比原始调度和简单的最近可行哈恩回波基线，提高了平均最终态保真度。重新路由可实现原本不可行的脉冲定时，而噪声的空间信息还能带来进一步增益。不过，当额外的输运引入过多误差时，这些优势会消失。总体而言，我们的结果表明，将DD与离子输运协同是减少QCCD处理器中退相位的有效编译器策略。
英文摘要
Dynamical decoupling (DD) helps maintain high-fidelity quantum computations by suppressing dephasing noise through carefully timed refocusing pulses. In quantum charge-coupled device (QCCD) architectures, however, where ions are shuttled throughout the device, transport constrains when pulses can be applied and affects the phase accumulated by an ion. Conventional DD methods do not account for shuttling and may therefore schedule pulses that must be omitted or shifted after transport scheduling, weakening the protection from dephasing. We therefore introduce shuttling-aware dynamical decoupling (SADD), an offline compiler pass that jointly selects refocusing pulses and local ion rerouting while preserving logical-gate timings and the total schedule length. In benchmark simulations, SADD improves average final-state fidelity over both the original schedules and a simple nearest-feasible Hahn-echo baseline when dephasing dominates control and transport errors and varies slowly enough for DD. Rerouting enables otherwise infeasible pulse timings, while spatial information about the noise can provide further gains. These benefits disappear, however, when the added transport introduces too much error. Overall, our results show that coordinating DD with ion transport is an effective compiler strategy for reducing dephasing in QCCD processors.
Comments14 pages, 6 figures, 1 table (Appendix 5 pages, 1 figure, 1 table)
