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乒乓直传协议是一种新颖的量子直传通信协议。基于量子纠缠特性,乒乓协议允许绝对安全地进行明文直接通信和渐进地进行密钥安全分发,是一种绝对安全的即时通信协议。该量子直传协议将来有望成为安全稳定的光量子通信的主流方式。然而,目前还没有该协议的物理实现方案。分析了乒乓直传协议的工作原理,给出了该协议的流程图,进而分析了协议的物理实现机制,结合纠缠光子源、自由空间单光子路由控制和单光子检测技术,提出了在自由空间中实现乒乓直传协议的实验技术方案,并设计出了乒乓直传协议的实验装置。此实验技术方案为从实验角度进一步研究乒乓协议,以及未来此协议的商业化应用提供了参考。
Ping Pong direct pass protocol is a novel quantum direct communication protocol. Based on the characteristics of quantum entanglement, Ping-pong protocol allows for explicit and explicit direct communication and gradual secure key distribution. It is an absolutely secure instant messaging protocol. The quantum direct transfer protocol in the future is expected to become a safe and stable way of the mainstream of optical quantum communication. However, there is currently no physical implementation of this protocol. The working principle of the ping-pong direct pass protocol is analyzed. The flow chart of this protocol is given, and then the physical realization mechanism of the protocol is analyzed. Combined with entangled photon source, free-space single-photon routing control and single-photon detection technology, In the agreement to achieve ping-pong direct experimental protocol, and designed a ping-pong direct pass protocol experimental device. This experimental scheme provides a reference for further study of the ping-pong protocol from an experimental perspective and for the commercial application of this protocol in the future.