Practical free-space quantum key distribution over 10 km in daylight and at night

被引：314

作者：

Hughes, RJ ^{[1
]}

Nordholt, JE ^{[1
]}

Derkacs, D ^{[1
]}

Peterson, CG ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA

来源：

NEW JOURNAL OF PHYSICS | 2002年 / 4卷

关键词：

D O I：

10.1088/1367-2630/4/1/343

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have demonstrated quantum key distribution (QKD) (Bennett C H and Brassard G 1984 Proc. IEEE Int. Conf. on Computers, Systems, and Signal Processing (Bangalore, India) p 175) over a 10 km, 1-airmass atmospheric range during daylight and at night. Secret random bit sequences of the quality required for the cryptographic keys used to initialize secure communications devices were transferred at practical rates with realistic security. By identifying the physical parameters that determine the system's secrecy efficiency, we infer that free-space QKD will be practical over much longer ranges under these and other atmospheric and instrumental conditions.

引用

页码：43.1 / 43.14

页数：14

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