A deterministic quantum secure direct communication network based on time-energy entanglement and sum-frequency generation

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A 15-user quantum secure direct communication network

We explore a deterministic quantum secure direct communication (qsdc) network based on time-energy entanglement and sum-frequency generation.

The results show that when any two users are performing qsdc over 40 kilometers of optical fiber, the fidelity of the entangled state shared by them is still greater than 95%, and the rate of informationtransmission can be maintained above 1kbp/s.

Authors

Zhantong Qi, Yuanhua Li, Yiwen Huang, Juan Feng, Yuanlin Zheng, Xianfeng Chen

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