Quantum nonreciprocity based on electromagnetically induced transparency in chiral quantum-optical systems

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.

Automated summary

On-chip single-photon nonreciprocal devices with high isolation and low insertion loss are achieved by utilizing electromagnetically induced transparency in chiral quantum systems. These devices, including a single-photon isolator and a single-photon circulator, provide high isolation and low insertion loss, while significantly broadening their bandwidths with the assistance of electromagnetically induced transparency.