Deterministic quantum key distribution based on Gaussian-modulated EPR correlations
He Guang-Qiang (何广强), Zeng Gui-Hua (曾贵华)
The State Key Laboratory of Fibre-Optic Local Area Networks and Advanced Optical Communication Systems Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030, China
Abstract 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 $\Delta I=I(\alpha,\beta)-I(\alpha,\epsilon)$ is calculated in view of Shannon information theory. Finally the security analysis is presented.
Received: 05 October 2005
Revised: 25 February 2006
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China (Grant No 60472018).
Cite this article:
He Guang-Qiang (何广强), Zeng Gui-Hua (曾贵华) Deterministic quantum key distribution based on Gaussian-modulated EPR correlations 2006 Chinese Physics 15 1284
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