The spatial degrees of freedom of MIMO quantum channels

被引：7
|
作者：
Xiao Hai-Lin [1 ,2 ]
Shan, Ouyang [2 ]
Nie Zai-Ping [1 ]
机构：
[1] Univ Elect Sci & Technol China, Sch Elect Engn, Chengdu 610054, Peoples R China
[2] Guilin Univ Elect Technol, Sch Informat & Commun, Guilin 541004, Peoples R China
来源：
ACTA PHYSICA SINICA | 2009年 / 58卷 / 06期
基金：
中国国家自然科学基金;
关键词：
multiple input multiple output(MIMO); quantum key distribution; Schrodinger equation; quantumization of the photon field;
D O I：
10.7498/aps.58.3685
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Quantum communication is a process of quantum key distribution (QKD). Current QKD technology restricts communication to a low bit rate. To improve the QKD bit rate and develop high rate and capacity, we propose a multiple-input-multiple-output quantum key distribution system. However, quantum field itself inevitably involves quantum noise (Which is determined by the quantum mechanics), which restrains the increase of capacity, and limits space resource utilization, that is, the problem of spatial degrees of freedom arises. The quantumization of the photon field and the electromagnetic wave equation satisfying the Schrodinger equation condition are adopted to investigate the upper bound of the spatial degrees of freedom for MIMO quantum channels, which will provide theoretical support and technical basis for developing robust space time processing algorithm for MIMO quantum communication and designing high performance systems.
引用
收藏
页码：3685 / 3691
页数：7
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