Getting something out of nothing

被引：0
|
作者：
Lo, HK
机构：
[1] Univ Toronto, Ctr Quantum Informat & Quantum Control, Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada
[2] Univ Toronto, Dept Phys, Toronto, ON M5S 3G4, Canada
来源：
QUANTUM INFORMATION & COMPUTATION | 2005年 / 5卷 / 4-5期
关键词：
quantum cryptography; quantum key distribution; unconditional security;
D O I：
暂无
中图分类号：
TP301 [理论、方法];
学科分类号：
081202 ;
摘要：
We study quantum key distribution with standard weak coherent states and show, rather counter-intuitively, that the detection events originated from vacua can contribute to secure key generation rate, over and above the best previous result. Our proof is based on a communication complexity/quantum memory argument. The key observation is that Eve does not have to store anything, if Alice sends out a vacuum state.
引用
收藏
页码：413 / 418
页数：6
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