Experimental quantum secure direct communication with single photons
By Jianyong Hu, Bo Yu, Mingyong Jing, Liantuan Xiao, Suotang Jia, Guo-qing Qin, G. Long. Light: Science & Applications, 2015
406 citations recorded by the source corpus.
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. A new protocol for quantum communication that works in the presence of channel noise and loss has been experimentally demonstrated. Quantum secure direct communication (QSDC) involves sending messages securely and directly over a quantum channel. Now, Jianyong Hu and co-workers from Shanxi University and Tsinghua University have developed a single-photon frequency coding scheme for QSDC. The protocol operates by encoding information into the frequency spectrum of a block of single photons rather than into the individual photons themselves. Analysis suggests that the scheme is more robust against channel noise and loss, which usually severely degrade quantum communication. It also eliminates the need for quantum error correction. Experiments implementing the frequency coding scheme with 16 frequency channels (to represent binary numbers 0000 to 1111) achieved a transmission rate of 4 kilobytes per second.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/9bb2efd9e69fd353316a220d271c453dfec8390c
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Citations in the corpus
- One-step quantum secure direct communication. (2021, methodology): “In the experimental aspect, in 2016, Hu et al. [26] experimentally demonstrated the QSDC with single photons in a noisy environment using frequency coding.”
- A Survey on Green 6G Network: Architecture and Technologies (2019, background): “The fundamental difference between quantum communication and classical binary based communication is whether eavesdropping can be detected on-site [65].”