Yun-Guang Han

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A wide area quantum key distribution (QKD) network deployed on communication infrastructures provided by China Mobile Ltd. is demonstrated. Three cities and two metropolitan area QKD networks were linked up to form the Hefei-Chaohu-Wuhu wide area QKD network with over 150 kilometers coverage area, in which Hefei metropolitan area QKD network was a typical(More)
The "Ping-Pong" (PP) protocol is a two-way quantum key protocol based on entanglement. In this protocol, Bob prepares one maximally entangled pair of qubits, and sends one qubit to Alice. Then, Alice performs some necessary operations on this qubit and sends it back to Bob. Although this protocol was proposed in 2002, its security in the noisy and lossy(More)
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(More)
Chun-Mei Zhang, Mo Li, Hong-Wei Li, Zhen-Qiang Yin, Dong Wang, Jing-Zheng Huang, Yun-Guang Han, Man-Li Xu, Wei Chen, Shuang Wang, Patcharapong Treeviriyanupab, Guang-Can Guo, Zheng-Fu Han 1 Key Laboratory of Quantum Information, CAS, and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China,(More)
The random number is a paramount issue in modern science. How to estimate the genuine randomness of the data generated by a given device is a central problem. Lunghi et al. proposed a self-testing quantum random number generator from a prepare-and-measure scenario with independent devices. Based on this Letter, Han et al. proposed a more efficient method(More)
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