On-chip single-photon nonreciprocal devices with high isolation and low insertion loss become a key element in quantum information processing. Based on electromagnetically induced transparency in chiral quantum systems, a single-photon isolator and a single-photon circulator are obtained without requiring unbalanced coupling. These devices have high isolation and low insertion loss. Moreover, their bandwidths are significantly broadened with the assistance of electromagnetically induced transparency.

中文翻译：

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基于手征量子光学系统中电磁感应透明的量子非互易性

具有高隔离度和低插入损耗的片上单光子非互易器件成为量子信息处理的关键要素。基于手性量子系统中的电磁感应透明性，无需不平衡耦合即可获得单光子隔离器和单光子环行器。这些器件具有高隔离度和低插入损耗。此外，在电磁感应透明度的帮助下，它们的带宽显着扩大。