Low-loss high-fidelity frequency beam splitter with tunable split ratio based on electromagnetically induced transparency
Kao-Fang Chang, Ta-Pang Wang, Chun-Yi Chen, Yi-Hsin Chen, Yu-Sheng Wang, Yong-Fan Chen, Ying-Cheng Chen, Ite A. Yu · Physical Review Research · 2021
The authors demonstrate a high efficiency and high fidelity frequency beam splitter using coherent-state single photons and show how it can be used for operations or devices in long-distance quantum communication.