Zheng Zhou

TL;DR: A wide area quantum key distribution (QKD) network deployed on communication infrastructures provided by China Mobile Ltd. is demonstrated and the effective integration between point-to-point QKD techniques and networking schemes is realized.

TL;DR: A demonstration of quantum key distribution (QKD) over a standard telecom fiber exceeding 50 dB in loss and 250 km in length is reported, with careful optimization of the 1 bit delayed Faraday-Michelson interferometer and the use of the superconducting single photon detector (SSPD).

TL;DR: In this article, the authors proposed a wavelength-dependent attacking protocol, which can be applied to all practical QKD systems with passive state modulation, and experimentally attack a practical polarization encoding Q-KD system to obtain all the secret key information at the cost of only increasing the quantum bit error rate from 1.3$ to 1.4%.

TL;DR: In this article, a new protocol for distributing keys in a quantum network overcomes theoretical bounds for key transmission rates, potentially enabling the implementation of secure communication in large networks in large quantum networks.

TL;DR: The first active implementation of the round-robin differential phase shift protocol is presented, in which monitoring of the signal disturbance is unnecessary, and the feasibility of the RRDPS protocol is confirmed, particularly in high-error situations.