泡沫覆盖不规则海面的非均匀空-水信道量子密钥分发

王潋; 周媛媛; 周学军; 陈霄

doi:10.3788/CO.20191206.1362

Volume 12 Issue 6

Dec. 2019

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Chinese Optics > 2019 > 12(6): 1362-1375.

WANG Lian, ZHOU Yuan-yuan, ZHOU Xue-jun, CHEN Xiao. Quantum key distribution based on heterogeneous air-water channels with foam-covered irregular sea surfaces[J]. Chinese Optics, 2019, 12(6): 1362-1375. doi: 10.3788/CO.20191206.1362

Citation:

WANG Lian, ZHOU Yuan-yuan, ZHOU Xue-jun, CHEN Xiao. Quantum key distribution based on heterogeneous air-water channels with foam-covered irregular sea surfaces[J]. Chinese Optics, 2019, 12(6): 1362-1375. doi: 10.3788/CO.20191206.1362

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Quantum key distribution based on heterogeneous air-water channels with foam-covered irregular sea surfaces

doi: 10.3788/CO.20191206.1362

1.
Department of Electronic Engineering, PLA Naval University of Engineering, Wuhan 430000, China
2.
Institute of War Studies, PLA Academy of Military Sciences, Beijing 100091, China

Funds:

National Natural Science Foundation of China 61302099

More Information

Corresponding author: ZHOU Yuan-yuan, E-mail:yyzhou516@163.com
Received Date: 18 Jan 2019
Rev Recd Date: 18 Feb 2019
Publish Date: 01 Dec 2019

Abstract

Abstract

For air-water Quantum Key Distribution(QKD), considering the effects of sea breeze, irregular sea surfaces with foam, the complicacy and variety of air-water channels and multiple scattering processes of the polarized quantum state, a heterogeneous air-water channel composite model is established. Based on this, the theoretical model of the error rate of air-water QKD systems is improved. Then, through a polarization vector Monte Carlo simulation, the transmission characteristics of photons in heterogeneous air-water channels and the overall transmission performance of air-water QKDs under different marine environments are analyzed in detail. The results show that heterogeneous air-water channels under clear seawater conditions can achieve a key distribution of 100 meters underwater, but the increase of wind speed and transmission distance will lead to an increase in the photon depolarization ratio and a decrease in fidelity, thereby increasing the polarization error rate. Meanwhile, the rise of wind speed and foam layer thickness adds the quantum error rate of air-water QKD systems and decreases the key generation rate and transmission distance. Both of these factors increase with an increase in signal wavelength. When the wavelength is 532 nm and the channel changes from best(no wind and foam) to worst(storm and foam layer thickness of 6 cm) conditions, the underwater transmission distance is shortened from 120.8 m to 85 m. It can guarantee a 100 m safety depth in underwater vehicles and alternate contingencies such as dragging the buoy can further increase the safety distance of air-water QKD. Therefore, this paper verifies the feasibility of a decoy QKD in a heterogeneous air-water channel with a foam-irregular sea surface and acts as a significant reference for future technologies in air-water integrated quantum communication links.
- quantum key distribution,
- heterogeneous air-water channel,
- foam-covered irregular sea surface,
- scattering,
- Monte carlo,
- error rate

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References(34)

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