Experimental investigation of quantum key distribution over water channel
| Autor: | Maoqi Cai, Shi-Cheng Zhao, Ya Xiao, Xin-Hong Han, Hao Zeng, Yonghe Yu, Zhaoming Wang, Yong-Jian Gu, Shuo Wang, Yuan Shen, Wendong Li, Tian Qian |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Quantum Physics Photon business.industry Attenuation Monte Carlo method FOS: Physical sciences Quantum channel Quantum key distribution 01 natural sciences Atomic and Molecular Physics and Optics 010309 optics Optics 0103 physical sciences Photon polarization Mueller calculus Electrical and Electronic Engineering Quantum Physics (quant-ph) business Engineering (miscellaneous) BB84 Computer Science::Cryptography and Security |
| Popis: | Quantum key distribution (QKD) has undergone significant development in recent decades, particularly with respect to free-space (air) and optical fiber channels. Here, we report the first proof-of-principle experiment for the BB84 protocol QKD over a water channel. Firstly, we demonstrate again the polarization preservation properties of the water channel in optical transmission according to the measured Mueller matrix, which is close to the unit matrix. The reason for the polarization preservation, revealed by Monte Carlo simulation, is that almost all the received photons are unscattered.Then, we performed the first polarization encoding BB84 protocol QKD over a 2.37m water channel. The results show that QKD can be performed with a low quantum bit error rate (QBER), less than 3.5%, with different attenuation coefficients. 14 pages, 5 figures |
| Databáze: | OpenAIRE |
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