发表机构
Indian Institute of Technology Tirupati; Center for Atomic, Molecular, and Optical Sciences and Technologies, Indian Institute of Technology Tirupati（印度理工学院提鲁帕蒂分校; 印度理工学院提鲁帕蒂分校原子、分子与光学科学与技术中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过数值模拟比较了离子阱腔QED系统中三种基于腔EIT的全光开关方案，揭示了开关速度与对比度间的权衡，并提供了优化指导。
AI 中文摘要
我们通过数值模拟研究了与光学腔耦合的俘获离子系统中基于腔EIT的全光开关的瞬态动力学。与稳态分析不同，时间相关响应直接提供了对开关速度、瞬态动力学和可实现开关对比度的洞察。我们考虑了三种不同的开关方案，并系统地比较了它们作为相关系统参数函数的性能。开关对比度根据时间相关的腔输出来评估，并用于表征每种方案的性能。对于四能级N型系统，我们发现通过抑制腔EIT信号进行开关与通过共振位移进行开关之间存在明显的权衡，前者表现出更快的时间响应。相应的三能级方案可以实现接近统一的开关对比度，且开关脉冲显著更短，尽管它不提供独立的开关控制场。这些结果确立了不同基于腔EIT的开关方案的性能限制和权衡，并为优化其操作提供了指导，适用于高速光门控、频率选择性光子路由、频分复用量子通信等应用。
英文摘要
We investigate the transient dynamics of cavity-EIT-based all-optical switching in a system of trapped ions coupled to an optical cavity through numerical simulations. In contrast to steady-state analysis, the time-dependent response provides direct insight into the switching speed, transient dynamics, and achievable switching contrast. We consider three distinct switching schemes and systematically compare their performance as a function of the relevant system parameters. The switching contrast is evaluated from the time-dependent cavity output and used to characterize the performance of each scheme. For the four-level N-type system, we find distinct trade-offs between switching through suppression of the cavity-EIT signal and switching through resonance shifting, with the former exhibiting a faster temporal response. The corresponding three-level scheme can achieve near-unity switching contrast with substantially shorter switching pulses, although it does not provide an independent switching control field. These results establish the performance limits and trade-offs of different cavity-EIT-based switching schemes and provide guidelines for optimizing their operation for applications such as high-speed optical gating, frequency-selective photon routing, frequency-multiplexed quantum communication, etc.
