How Single-Photon Switching is Quenched with Multiple Λ–Level Atoms,Physical Review Letters

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How Single-Photon Switching is Quenched with Multiple Λ–Level Atoms
Physical Review Letters ( IF 8.1 ) Pub Date : 2024-09-11 , DOI: 10.1103/physrevlett.133.113601
Alexander N. Poddubny ₁ , Serge Rosenblum ₁ , Barak Dayan _{1,

2}

Affiliation

Single-photon nonlinearity, namely, the change in the response of the system as the result of the interaction with a single photon, is generally considered an inherent property of a single quantum emitter. Although the dependence on the number of emitters is well understood for the case of two-level systems, deterministic operations such as single-photon switching or photon-atom gates inherently require more complex level structures. Here, we theoretically consider single-photon switching in ensembles of emitters with a

Λ

-level scheme and show that the switching efficiency vanishes with the number of emitters. Interestingly, the mechanism behind this behavior is the quantum Zeno effect, manifested in a slowdown of the photon-controlled dynamics of the atomic ground states.

中文翻译：

如何用多个 Λ 级原子猝灭单光子切换

单光子非线性，即由于与单个光子相互作用而引起的系统响应的变化，通常被认为是单量子发射器的固有属性。尽管对于两能级系统的情况，对发射器数量的依赖性是众所周知的，但诸如单光子切换或光子原子门之类的确定性操作本质上需要更复杂的能级结构。在这里，我们从理论上考虑发射器集合中的单光子切换