发表机构
IonQ, Inc.（IonQ公司）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究在异质量子系统中实现了囚禁$^{138}$Ba$^{+}$离子与金刚石纳米光子腔SiV$^{-}$中心的纠缠，速率达1.03(1)kHz，是现有最快同类型光子链路的4倍，匹配囚禁离子处理器周期时间，满足分布式量子计算需求。
AI 中文摘要
分布式量子计算需要不同处理器模块中量子比特间快速、高保真的纠缠。单原子量子比特间的光子链路可提供可切换的长程连接，但光子损耗限制了其纠缠速率。本研究将囚禁的$^{138}$Ba$^{+}$离子与金刚石纳米光子腔中的硅空位（SiV$^{-}$）中心纠缠，离子发射的光子经波长与编码转换后，从SiV$^{-}$-腔系统反射并被探测，单个被探测光子可预示纠缠。计入所有转换损耗后，生成离子-SiV$^{-}$贝尔对的平均速率为1.03(1)kHz，保真度为87.9(7)%，该速率是两个囚禁离子间最快光子链路的4倍，对应每毫秒生成一个贝尔对，与计划的囚禁离子处理器的周期时间匹配。
英文摘要
Distributed quantum computing requires rapid, high-fidelity entanglement between qubits in separate processor modules. Photonic links between single-atom qubits provide switchable, long-range connections, but photon loss limits their entanglement rate. Here we entangle a trapped $^{138}$Ba$^{+}$ ion with a silicon-vacancy (SiV$^{-}$) center in a diamond nanophotonic cavity. A photon emitted by the ion is converted in wavelength and encoding, reflected from the SiV$^{-}$--cavity system and detected, so that a single detected photon heralds entanglement. Including all conversion losses, we generate ion--SiV$^{-}$ Bell pairs at an average rate of 1.03(1)\,kHz with a fidelity of 87.9(7)\%. This is four times the rate of the fastest photonic link between two trapped ions and corresponds to one Bell pair per millisecond, matching the cycle time of planned trapped-ion processors.
