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Laser & Optoelectronics Progress

Influence of Rainfall on Performance of Satellite-Ground Quantum Links and Teleportation

刘琦 Liu Qi, 杨光 Yang Guang, 聂敏 Nie Min, 张美玲 Zhang Meiling

Published Jan 1, 2021• 3 citations
Publisher
DOI
10.3788/lop202158.0727001

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Abstract Soot aerosol is an important part of atmospheric aerosol, which has important influence on the propagation of quantum signal. In order to study the influence of soot aerosol on satellite-ground quantum communication, according to the size distribution parameter and extinction coefficient of the soot aerosol, the influence of the concentration of the soot aerosol particles and the transmission distance on the attenuation of the link is analyzed. The simulation experiments of channel capacity, channel fidelity and channel bit error rate (Ber) are carried out with amplitude-damped channel. The simulation results show that the soot aerosol concentration increases from 2.1×10 6 / m 3 to 3.2 10× 6 / m 3 , the link attenuation factor increases from 0.3dB/ km to 0.46dB/ km, the fidelity decreases from 0.98 to 0.97, and the bit error rate increases from 0.0087 to 0.0122 at a transmission distance of 3km . hhen the transmission distance is 6km and the particle concentration is 2.1×10 6 / m 3 , 2.7 10× 6 / m 3 and 3.9×10 6 / m 3 , the channel capacity increases from 1.078 to 1.0809, and then decreases to 1.0804. Therefore, the soot aerosol has influence on the performance of satellite-ground quantum communication, and the degree of influence is different. In order to ensure the reliability of quantum communication between satellite and ground, the parameters can be adjusted to ensure the normal transmission of quantum signal.

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Link duration is one of the most important parameters which influence the quantum bit rate of the satellite-ground quantum key distribution.The factors that may influence the link duration are analyzed,and the simulation shows that with the increasing of the orbital altitude and the decreasing of the minimum elevation angle,the link duration is improved greatly;meanwhile,the distance between ground track of satellite and ground station is very important to the link duration of single photons link,so is the distance between two ground stations to entangled photons link;in the end,the link duration of entangled photons link is more complex than single photons link for its influencing factors,it is eventually determined by the relation of the ground track of satellite and the location of two ground stations.

Acta Sinica Quantum Optica•Jan 1, 2009•0 citations
Abstract Soot aerosol is an important part of atmospheric aerosol, which has important influence on the propagation of quantum signal. In order to study the influence of soot aerosol on satellite-ground quantum communication, according to the size distribution parameter and extinction coefficient of the soot aerosol, the influence of the concentration of the soot aerosol particles and the transmission distance on the attenuation of the link is analyzed. The simulation experiments of channel capacity, channel fidelity and channel bit error rate (Ber) are carried out with amplitude-damped channel. The simulation results show that the soot aerosol concentration increases from 2.1×10 6 / m 3 to 3.2 10× 6 / m 3 , the link attenuation factor increases from 0.3dB/ km to 0.46dB/ km, the fidelity decreases from 0.98 to 0.97, and the bit error rate increases from 0.0087 to 0.0122 at a transmission distance of 3km . hhen the transmission distance is 6km and the particle concentration is 2.1×10 6 / m 3 , 2.7 10× 6 / m 3 and 3.9×10 6 / m 3 , the channel capacity increases from 1.078 to 1.0809, and then decreases to 1.0804. Therefore, the soot aerosol has influence on the performance of satellite-ground quantum communication, and the degree of influence is different. In order to ensure the reliability of quantum communication between satellite and ground, the parameters can be adjusted to ensure the normal transmission of quantum signal.
Abstract The reference-frame-independent (RFI) quantum key distribution (QKD) is suitable for satellite-based links by removing the active alignment on the reference frames. However, how the beam wandering influences the performance of RFI-QKD remains a pending issue in satellite-to-ground links. In this paper, based on the mathematical model for characterizing beam wandering, we present the security analysis for satellite-to-ground RFI-QKD and analytically derive formulas for calculating the secret key rate with beam wandering. Our simulation results show that the performance of RFI-QKD is better than the Bennett–Brassard 1984 (BB84) QKD with beam wandering in asymptotic case. Furthermore, the degree of influences of beam wandering is specifically presented for satellite-to-ground RFI-QKD when statistical fluctuations are taken into account. Our work can provide theoretical support for the realization of RFI-QKD using satellite-to-ground links and have implications for the construction of large-scale satellite-based quantum networks.
Link duration is one of the most important parameters which influence the quantum bit rate of the satellite-ground quantum key distribution.The factors that may influence the link duration are analyzed,and the simulation shows that with the increasing of the orbital altitude and the decreasing of the minimum elevation angle,the link duration is improved greatly;meanwhile,the distance between ground track of satellite and ground station is very important to the link duration of single photons link,so is the distance between two ground stations to entangled photons link;in the end,the link duration of entangled photons link is more complex than single photons link for its influencing factors,it is eventually determined by the relation of the ground track of satellite and the location of two ground stations.