Experimental demonstration on the deterministic quantum key distribution based on entangled photons
Hua Chen, Zhi‐Yuan Zhou, Alaa Jabbar Jumaah, Zhen−Qiang Yin, Juan Wu, Yun-Guang Han, Shuang Wang, Hong-Wei Li, De‐Yong He, Shelan Khasro Tawfeeq, Bao‐Sen Shi, Guang‐Can Guo, Wei Chen, Zheng‐Fu Han · Scientific Reports · 2016
As an important resource, entanglement light source has been used in developing quantum information technologies, such as quantum key distribution(QKD). There are few experiments implementing entanglement-based deterministic QKD protocols since the security of existing protocols may be compromised in lossy channels. In this work, we report on a loss-tolerant deterministic QKD experiment which follows a modified "Ping-Pong"(PP) protocol. The experiment results demonstrate for the first time that a secure deterministic QKD session can be fulfilled in a channel with an optical loss of 9 dB, based on a telecom-band entangled photon source. This exhibits a conceivable prospect of ultilizing entanglement light source in real-life fiber-based quantum communications.