Feasibility of satellite quantum key distribution

被引：186

作者：

Bonato, C. ^{[1
]}

Tomaello, A. ^{[1
]}

Da Deppo, V. ^{[1
]}

Naletto, G. ^{[1
]}

Villoresi, P. ^{[1
]}

机构：

[1] Univ Padua, INFM, CNR, Dept Informat Engn,LUXOR, I-35131 Padua, Italy

来源：

NEW JOURNAL OF PHYSICS | 2009年 / 11卷

关键词：

ELECTROMAGNETIC BEAM-PROPAGATION; SPLITTING ATTACK; COMMUNICATION; CRYPTOGRAPHY; INFORMATION;

D O I：

10.1088/1367-2630/11/4/045017

中图分类号：

O4 [物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

In this paper, we present a novel analysis of the feasibility of quantum key distribution between a LEO satellite and a ground station. First of all, we study signal propagation through a turbulent atmosphere for uplinks and downlinks, discussing the contribution of beam spreading and beam wandering. Then we introduce a model for the background noise of the channel during night-time and day-time, calculating the signal-to-noise ratio for different configurations. We also discuss the expected error-rate due to imperfect polarization compensation in the channel. Finally, we calculate the expected key generation rate of a secure key for different configurations (uplink, downlink) and for different protocols (BB84 with and without decoy states, entanglement-based Ekert91 protocol).

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