Continuous operation of high bit rate quantum key distribution

被引：146
|
作者：
Dixon, A. R. [1 ,2 ]
Yuan, Z. L. [1 ]
Dynes, J. F. [1 ]
Sharpe, A. W. [1 ]
Shields, A. J. [1 ]
机构：
[1] Toshiba Res Europe Ltd, Cambridge Res Lab, Cambridge CB4 0GZ, England
[2] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
来源：
APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 16期
关键词：
CRYPTOGRAPHY; SECURITY;
D O I：
10.1063/1.3385293
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We demonstrate a quantum key distribution with a secure bit rate exceeding 1 Mbit/s over 50 km fiber averaged over a continuous 36 h period. Continuous operation of high bit rates is achieved using feedback systems to control path length difference and polarization in the interferometer and the timing of the detection windows. High bit rates and continuous operation allows finite key size effects to be strongly reduced, achieving a key extraction efficiency of 96% compared to keys of infinite lengths. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3385293]
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页数：3
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