Experimental Demonstration of Free-Space Decoy-State Quantum Key Distribution over 144 km

FPGA-based Digital Quantum Coprocessor

“…One example of a QKD protocol is the BB84 protocol [BB84], which was the first protocol proposed for quantum key distribution and remains one of the most widely implemented protocols inside of commercial products and used within research labs. QKD based on the BB84 protocol has been demonstrated over distances over 100 km in length in both optical fibre and free space, reaching transmission speeds on the order of one megabit per second over shorter distances ( [SMA07,LUC13]). Optical fibre based QKD products have already been commercially deployed and are in use today to distribute quantum safe keys in real networks.…”

Observations on entanglement, non-locality and ultra-high dilutions

“…Quantitative results confirm that entanglement is indeed a physical property of quantum systems and can be achieved at rather macroscopic distances. 4,5 It is should be noted that the above schematic outline of entanglement has been simplified considerably to make the general concept more accessible and to make clear the basis on which practical entanglement works.…”

量子通信现状与展望

“…诱骗态方法的首个实验由清华大学和中国科技大学等单位的联合团队完成 [28] , 这也成为历史上 首次超过 100 km 的安全量子密钥分发. 同一时期的实验还有美国橡树岭国家实验室与美国国家标准 局团队的合作实验 [29] 、维也纳大学等单位的实验 [30] 等. 此后, 中国科技大学结合光开关技术, 把诱 骗态方法用于量子网络, 先后实现了 3 节点与 5 节点的量子网络安全通信 [4] .…”