| 地磁场对星地量子密钥分配的影响 |
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| 引用本文： | 张光宇,郑凯,周思甜,王美霞.地磁场对星地量子密钥分配的影响[J].哈尔滨理工大学学报,2009,14(4):76-78. |
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| 作者姓名： | 张光宇 郑凯 周思甜 王美霞 |
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| 作者单位： | 哈尔滨理工大学,应用科学学院,黑龙江,哈尔滨,150080 |
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| 基金项目： | 黑龙江省自然科学基金项目 |
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| 摘 要： | 偏振跟踪技术是自由空间量子密钥分配中的关键技术之一．本文建立了星地量子密钥分配链路模型，研究了地磁场对光子偏振态大气传输的影响．理论分析和数值计算结果表明，光子在大气传输过程中，光振动平面会发生旋转，旋转角度的量级为10^-3tad．
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| 关 键 词： | 量子密钥分配 偏振跟踪 地磁场 |
Influence of Geomagnetic Field in Satellite-ground Quantum Key Distribution |
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| ZHANG Guang-yu,ZHENG Kai,ZHOU Si-tian,WANG Mei-xia.Influence of Geomagnetic Field in Satellite-ground Quantum Key Distribution[J].Journal of Harbin University of Science and Technology,2009,14(4):76-78. |
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| Authors: | ZHANG Guang-yu ZHENG Kai ZHOU Si-tian WANG Mei-xia |
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| Affiliation: | ( School of Applied Science, Harbin University of Science and Technology, Harbin 150080, China) |
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| Abstract: | Polarization tracking technique is one of key techniques in free-space quantum key distribution （QKD）. In this paper, satellite-ground QKD link model is established and influence of geomagnetic field on transmission of photon polarization is analyzed. Theoretical analysis and numerical simulation show that optical vibration plane can rotate in the process of transmission of photon polarization and rotation angle is on the order of 10^-3red. |
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| Keywords: | quantum key distribution polarization tracking geomagnetic field |
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