通过超快原子 - 离子纠缠门实现确定性原子穿梭互连
Deterministic atom-shuttle interconnects via ultrafast atom-ion entangling gate
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中文总结 AI 辅助
研究中性原子阵列和捕获离子晶体缺乏快速确定性相互作用问题，提出利用电荷诱导偶极矩力等产生受控$Z$门的方法，实现约5kHz原子穿梭，加速链路并实现混合存储器，混合架构在固定条件下比单一架构支持更多操作。
中文摘要 AI 辅助
中性原子阵列和捕获离子晶体在容错量子计算方面具有互补优势，但缺乏确定性快速相互作用的方法。本文提出一种由里德堡激发原子与捕获离子之间的电荷诱导偶极矩（$C_4$）力产生的受控$Z$门，通过离子上的自旋相关光学马格努斯力平衡，在几微秒内闭合相空间轨迹。切换里德堡态可将该方案扩展到多离子晶体，开销可忽略不计。由此产生的约5kHz原子穿梭加速了短距离QCCD链路，并实现了混合qLDPC存储器，其中原子逻辑量子比特被写入视为被动存储区的离子块。我们进行了电路级蒙特卡罗模拟，发现在固定码距和逻辑错误率下，混合架构比仅原子或仅离子架构支持多数量级的操作。
英文摘要
Neutral-atom arrays and trapped-ion crystals offer complementary strengths for fault-tolerant quantum computing but lack a fast way to deterministically interact. Here we propose a controlled-$Z$ gate generated by the charge-induced-dipole ($C_4$) force between a Rydberg-excited atom and a trapped ion, balanced by a spin-dependent optical Magnus force on the ion that closes phase-space trajectories within a few microseconds. Toggling the Rydberg state extends the scheme to multi-ion crystals at negligible overhead. The resulting ${\sim}5\,$kHz atom shuttle accelerates short-distance QCCD links and enables hybrid qLDPC memories in which atom logical qubits are written onto an ion block treated as a passive storage zone. We perform circuit-level Monte Carlo simulations and find that the hybrid architecture supports orders of magnitude more operations than atom-only or ion-only architectures at fixed code distance and logical error rate.
