Realizing an Entanglement-Based Multiuser Quantum Network with Integrated Photonics
Wenjun Wen, Zhiyu Chen, Liangliang Lu, Wenhan Yan, Wenyi Xue, Peiyu Zhang, Yanqing Lu, Shining Zhu, Xiao‐Song Ma
Abstract
Fully connected quantum networks have been realized with bulk nonlinear crystals and passive filters, but this traditional optical platform limits a network's scalability in terms of photon-pair number and brightness, compatibility with quantum memory, and cost effectiveness. The authors address all of those challenges by employing an integrated SiN microring resonator to generate energy-time-entangled quantum frequency microcombs with a wide frequency span and narrow bandwidth modes. Photon pairs are selected and distributed to form a fully and simultaneously connected multiuser quantum network, paving the way to turnkey solutions for large entanglement-based quantum networks.