发表机构
Novosibirsk State Technical University（新西伯利亚国立技术大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文理论研究了波导中三能级阶梯系统对单光子脉冲的散射，发现低非谐性下第三能级显著抑制受激发射，并可通过调节入射光子参数控制反射场中的光子聚束效应。
AI 中文摘要
本工作致力于研究量子三能级阶梯系统与一维开放波导中连续电磁场相互作用的理论。我们考虑一种与受激发射密切相关的场景——单光子指数脉冲被激发态三能级发射体散射。利用实空间形式，我们得到了系统波函数的解析表达式。我们表明，对于transmon（最常见的人造原子类型）固有的三能级系统低非谐性，第三能级的影响可以对系统行为产生显著作用。即，当相对非谐性低于$| \alpha_r | < 4\\%$时，第三能级的存在在很大程度上抑制了受激发射效应。然而，对于三能级系统，可以获得关联效应，如反射场中的光子聚束，这也可以通过调节入射光子参数来“关闭”。
英文摘要
This work is devoted to a theoretical study of the interaction of a quantum three-level ladder system with a continuous electromagnetic field in a one-dimensional open waveguide. We consider a situation closely resembling stimulated emission - the scattering of a single-photon exponential pulse by an excited three-level emitter. Using the real-space formalism, we obtain an analytical expression for the wavefunction of our system. We show that, for the low anharmonicity of a three-level system inherent to a transmon (the most common type of artificial atom), the influence of the third level can have a significant effect on the system's behavior. Namely, the presence of the third level largely suppresses the stimulated emission effect if the relative anharmonicity is lower than $| α_r | < 4\%$. However, for a three-level system, it is possible to obtain correlation effects such as photon bunching in the reflected field, which can also be 'switched off' by tuning the incident photon parameters.
Comments10 pages, 8 figures
