We study the correlated transport of photons through a chain of three-level emitters that are coupled chirally to a photonic mode of a waveguide. It is found that this system can transfer a weak classical input into a strongly correlated state of light in a unitary manner. Our analysis reveals two-photon scattering eigenstates, that are akin to Fano resonances or shape resonances in particle collisions and facilitate the emergence of antibunched light with long-range correlations upon crossing a critical length of the chain. By operating close to conditions of electromagnetically induced transparency of the three-level medium, a high degree of antibunching and photon transmission can be maintained in the presence of moderate losses. These features suggest a promising mechanism for single-photon generation and may open the door to exploring correlated quantum many-body states of light with repulsively interacting photons.

中文翻译：

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三能级量子发射体的手性链中光与斥力光子的强相关状态。

我们研究了通过三级发射器链与光子耦合到波导的光子模式相关的光子的相关传输。发现该系统可以以统一的方式将弱的经典输入转换为光的强相关状态。我们的分析揭示了两个光子散射的本征态，类似于粒子碰撞中的Fano共振或形状共振，并在穿过链的关键长度时促进了具有远距离相关性的反聚束光的出现。通过在三级介质的电磁感应透明性条件附近操作，可以在存在中等损耗的情况下保持高度的反聚束和光子传输。