Experimental quantum key distribution with uncharacterized sources and projective measurements
| Autor: | Liang Ji, Qin Wang, Chun-Mei Zhang, Jian-Rong Zhu, Wen-Zhe Wu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Quantum optics
business.industry Computer science 02 engineering and technology Quantum channel Quantum key distribution 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics 010309 optics Optics Computer engineering Secure communication Transmission (telecommunications) Encoding (memory) 0103 physical sciences Photon polarization 0210 nano-technology business Quantum information science |
| Zdroj: | Optics Letters. 44:5703 |
| ISSN: | 1539-4794 0146-9592 |
| DOI: | 10.1364/ol.44.005703 |
| Popis: | In theory, quantum key distribution (QKD) can offer information-theoretic secure communication based on the laws of quantum mechanics. However, the vast majority of practical QKD implementations assume the perfect state preparation to ensure security, which is a demanding requirement with current technology. Here, by incorporating the mismatched-basis data, we report an experimental decoy-state QKD demonstration with uncharacterized encoding sources, which only requires that the encoding states are two-dimensional. Furthermore, the measurement operation of the receiver is loosened to be projective measurements. With a rigorous statistical fluctuation analysis, we can distribute secret keys when the transmission distances of the standard fiber link are 101 and 202 km. Our experimental demonstration represents a significant step toward realizing long-distance quantum communication, even with uncharacterized sources and projective measurements. |
| Databáze: | OpenAIRE |
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