期刊
LIGHT-SCIENCE & APPLICATIONS
卷 5, 期 -, 页码 -出版社
CHINESE ACAD SCIENCES, CHANGCHUN INST OPTICS FINE MECHANICS AND PHYSICS
DOI: 10.1038/lsa.2016.144
关键词
block transmission; channel loss and noise; DL04 protocol; quantum secure direct communication; single-photon frequency coding
类别
资金
- 973 Program [2012CB921603]
- 863 Program [2011AA010801]
- Natural Science Foundation of China [61527824, 11374196, 10934004, 11204166, 11175094, 91221205]
- PCSIRT [IRT 13076]
- National Basic Research Program of China [2015CB921001]
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.
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