发表机构
Guangdong University of Technology; Sun Yat-Sen University（广东工业大学; 中山大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出路径互补机制，在混合腔极化激元中实现定向量子光，兼顾不对称光子统计与路径相干性，并展示可切换的定向光子阻塞及强路径纠缠。
AI 中文摘要
定向量子光要求在不牺牲传播路径之间相干性的前提下实现不对称的光子统计，这一组合在单一量子光学平台内仍然难以实现。在此，我们在混合腔极化激元中识别出一种微观路径互补机制，该机制调和了这两个要求。在塞曼分裂的环形腔量子电动力学系统中，腔背向散射使反向传播模式发生杂化，而塞曼分裂则产生光谱不对称的激发通道。在弱驱动下，它们的相互作用产生了与强单光子路径纠缠共存的定向光子阻塞：一个输入方向表现出反聚束，而相反方向则呈聚束。值得注意的是，在两个单光子极化激元共振之间切换会逆转光子统计和强度不对称性，同时在广泛的参数范围内几乎保持路径并发性不变。我们的结果确立了路径互补性作为具有保留量子相干性的定向非经典光的一般设计原则。
英文摘要
Directional quantum light requires asymmetric photon statistics without sacrificing coherence between propagation paths, a combination that remains difficult to achieve within a single quantum-optical platform. Here we identify a microscopic path-complementarity mechanism in hybridized cavity polaritons that reconciles these two requirements. In a Zeeman-split ring-cavity QED system, cavity backscattering hybridizes the counterpropagating modes, whereas the Zeeman splitting creates spectrally asymmetric excitation channels. Their interplay gives rise, under weak driving, to directional photon blockade coexisting with strong single-photon path entanglement: one input direction exhibits antibunching while the opposite direction is bunched. Remarkably, switching between the two one-photon polariton resonances reverses both the photon-statistical and intensity asymmetries while nearly preserving the path concurrence over a broad parameter regime. Our results establish path complementarity as a general design principle for directional nonclassical light with retained quantum coherence.
Comments10 pages, 4 figures
