Experimental quantum secure direct communication with single photons  

作　　者：Jian-Yong Hu Bo Yu Ming-Yong Jing Lian-Tuan Xiao Suo-Tang Jia Guo-Qing Qin Gui-Lu Long 

机构地区：[1]State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Laser Spectroscopy,Shanxi University,Taiyuan,Shanxi 030006,China [2]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China [3]State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics,Tsinghua University,Beijing 100084,China [4]Collaborative Innovation Center of Quantum Matter,Beijing 100084,China [5]Tsinghua National Laboratory for Information Science and Technology,Tsinghua University,Beijing 100084,China

出　　处：《Light(Science & Applications)》2016年第1期487-491,共5页光（科学与应用)（英文版）

基　　金：sponsored by the 973 Program(No.2012CB921603);863 Program(No.2011AA010801);the Natural Science Foundation of China(Nos.61527824,11374196,10934004 and 11204166);PCSIRT(No.IRT 13076);supported by the Natural Science Foundation of China(Nos.11175094 and 91221205);the National Basic Research Program of China(No.2015CB921001).

摘　　要：Quantum secure direct communication is an important mode of quantum communication in which secret messages are securely communicated directly over a quantum channel.Quantum secure direct communication is also a basic cryptographic primitive for constructing other quantum communication tasks,such as quantum authentication and quantum dialog.Here,we report the first experimental demonstration of quantum secure direct communication based on the DL04 protocol and equipped with single-photon frequency coding that explicitly demonstrated block transmission.In our experiment,we provided 16 different frequency channels,equivalent to a nibble of four-bit binary numbers for direct information transmission.The experiment firmly demonstrated the feasibility of quantum secure direct communication in the presence of noise and loss.

关 键 词：block transmission channel loss and noise DL04 protocol quantum secure direct communication single-photon frequency coding 

分 类 号：O41[理学—理论物理]