Device-independent quantum key distribution over 100 km with single atoms · B.-W. Lu et al.
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Bo-Wei Lu1,2,3†, Chao-Wei Yang1,2,3†, Run-Qi Wang1,2,3†, Bo-Feng Gao4, Yi-Zheng Zhen1,2, Zhen-Gang Wang1,2,3, Jia-Kai Shi1,2,3, Zhong-Qi Ren1,2, Thomas A. Hahn5, Ernest Y.-Z. Tan6,7, Xiu-Ping Xie3,4, Ming-Yang Zheng3,4, Xiao Jiang1,2,3, Jun Zhang1,2,3, Feihu Xu1,2,3, Qiang Zhang1,2,3,4, Xiao-Hui Bao1,2,3*, Jian-Wei Pan1,2,3* We demonstrate DI-QKD by distributing high-fidelity heralded entanglement between two 87Rb atoms over spooled fibers up to 100 km. Remote entanglement is generated through the SPI scheme, which mitigates photon loss and enables efficient long-distance entanglement distribution. By using a tailored Rydberg-based single-photon emission process, the photon recoil effect in SPI is strongly suppressed without introducing noise. Fiber attenuation is further reduced by down-converting the emitted 780-nm photons to a 1.3-μm telecom wavelength. Together, these advances enable long-distance DI-QKD. …
摘自《科学》(Science)第391卷 第6785期 · 2026年2月5日,B.-W. Lu et al.。仅引用开头一小段供了解文章,版权归原刊所有,全文请阅读原刊。