期刊
APL PHOTONICS
卷 5, 期 7, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/5.0002595
关键词
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资金
- National Key R&D Program of China [2017YFA0303704, 2018YFB2200400, 2017YFA0304000]
- National Natural Science Foundation of China (NSFC) [61875101, 91750206, 61575102]
- Beijing National Science Foundation (BNSF) [Z180012]
- Beijing Academy of Quantum Information Sciences [Y18G26]
- Tsinghua University Initiative Scientific Research Program
Quantum key distribution (QKD) is a crucial technology for information security in the future. Developing simple and efficient ways to establish QKD among multiple users is important to extend the applications of QKD in communication networks. Herein, we proposed a scheme of symmetric dispersive optics QKD and demonstrated an entanglement-based quantum network based on it. In the experiment, a broadband entangled photon pair source was shared by end users via wavelength and space division multiplexing. The wide spectrum of generated entangled photon pairs was divided into 16 combinations of frequency-conjugate channels. Photon pairs in each channel combination supported a fully connected subnet with eight users by a passive beam splitter. Eventually, it showed that an entanglement-based QKD network over 100 users could be supported by one entangled photon pair source in this architecture. It has great potential on applications of local quantum networks with large user number.
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