Deterministic quantum key distribution based on Gaussian-modulated EPR correlations  

作　　者：何广强 曾贵华 

机构地区：[1]The State Key Laboratory of Fibre-Optic Local Area Networks and Advanced Optlcal Gommunicatlon Systems Department of Electronic Englneering, Shanghal Jiaotong University, Shanghai 200030, China

出　　处：《Chinese Physics B》2006年第6期1284-1289,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （Grant No 60472018）.

摘　　要：This paper proposes a deterministic quantum key distribution scheme based on Gaussian-modulated continuous variable EPR correlations. This scheme can implement fast and efficient key distribution. The security is guaranteed by continuous variable EPR entanglement correlations produced by nondegenerate optical parametric amplifier. For general beam splitter eavesdropping strategy, the secret information rate ΔI = I（α, β）-I（α, ε） is calculated in view of Shannon information theory. Finally the security analysis is presented.This paper proposes a deterministic quantum key distribution scheme based on Gaussian-modulated continuous variable EPR correlations. This scheme can implement fast and efficient key distribution. The security is guaranteed by continuous variable EPR entanglement correlations produced by nondegenerate optical parametric amplifier. For general beam splitter eavesdropping strategy, the secret information rate ΔI = I（α, β）-I（α, ε） is calculated in view of Shannon information theory. Finally the security analysis is presented.

关 键 词：quantum key distribution continuous variable EPR correlation Gaussian modulation 

分 类 号：O413[理学—理论物理]