Simple and efficient quantum key distribution with parametric down-conversion

被引：144

作者：

Adachi, Yoritoshi ^{[1
]}

Yamamoto, Takashi

Koashi, Masato

Imoto, Nobuyuki

机构：

[1] Osaka Univ, Grad Sch Engn Sci, Dept Mat Engn Sci, Div Mat Phys, Osaka 5608531, Japan

[2] CREST Res Team Photon Quantum Informat, Kawaguchi, Saitama 3310012, Japan

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.99.180503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose an efficient quantum key distribution protocol based on the photon-pair generation from parametric down-conversion (PDC). It uses the same experimental setup as the conventional protocol, but a refined data analysis enables detection of photon-number splitting attacks by utilizing information from a built-in decoy state. Assuming the use of practical detectors, we analyze the unconditional security of the new scheme and show that it improves the secure key generation rate by several orders of magnitude at long distances, using a high intensity PDC source.

引用

页数：4

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