Experimental Quantum Secret Sharing and Third-Man Quantum Cryptography
Yu-Ao Chen, An‐Ning Zhang, Zhi Zhao, Xiaoqi Zhou, Chao‐Yang Lu, Cheng-Zhi Peng, Tao Yang, Jian-Wei Pan · Physical Review Letters · 2005
Quantum secret sharing (QSS) and third-man quantum cryptography (TQC) are essential for advanced quantum communication; however, the low intensity and fragility of the multiphoton entanglement source in previous experiments have made their realization an extreme experimental challenge. Here, we develop and exploit an ultrastable high intensity source of four-photon entanglement to report an experimental realization of QSS and TQC. The technology developed in our experiment will be important for future multiparty quantum communication.