发表机构
The Ohio State University（俄亥俄州立大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究针对双物种中性原子系统中双光子激发引起的激光串扰问题，建立模型并设计门方案，在$^{85}$Rb/$^{87}$Rb系统中实现超过99.8%的保真度，并指出通过改进激发可进一步提升。
AI 中文摘要
近年来，中性原子阵列因其在量子信息处理中的巨大潜力而备受关注。高保真度的纠缠操作通常通过双光子过程将原子激发到高里德伯态来实现。为了在硬件层面提升这些系统的性能，双物种策略已被应用于增强中性原子系统中的读出、纠错和重新装载。然而，文献中对于双物种系统中双光子激发引起的激光串扰的影响在很大程度上尚未被探索。在此，我们开发了一个模型，该模型考虑了双光子驱动下物种间里德伯门中串扰的影响。我们证明，通过适当的门设计，这种串扰的影响可以被抑制到任意小的水平，在$^{85}$Rb/$^{87}$Rb系统的近失谐情况下，采用保守的实验参数即可实现大于$99.8\%$的门保真度。我们还概述了如何通过改进里德伯激发来进一步增强这一保真度。
英文摘要
Recently, neutral atom arrays have become known for their promising potential in quantum information processing. High-fidelity entangling operations are typically achieved by exciting atoms to high-lying Rydberg states through two-photon processes. To improve the performance of these systems at the hardware level, dual-species strategies have been applied to enhance readout, error correction, and reloading in neutral atom systems. However, the influence of laser crosstalk arising from two-photon excitation for dual-species systems has remained largely unexplored in the literature. Here, we develop a model that incorporates the influence of crosstalk in inter-species Rydberg gates with two-photon driving. We demonstrate that the influence of this crosstalk can be suppressed to arbitrarily small levels through appropriate gate design, with gate fidelities greater than $99.8\%$ achievable with conservative experimental parameters in the near-detuned case of an $^{85}$Rb/$^{87}$Rb system. We also outline how this fidelity can be further enhanced through improvements to the Rydberg excitation.
