中国物理B ›› 2006, Vol. 15 ›› Issue (6): 1284-1289.doi: 10.1088/1009-1963/15/6/025

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Deterministic quantum key distribution based on Gaussian-modulated EPR correlations

何广强, 曾贵华   

  1. 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
  • 收稿日期:2005-10-05 修回日期:2006-02-25 出版日期:2006-06-20 发布日期:2006-06-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 60472018).

Deterministic quantum key distribution based on Gaussian-modulated EPR correlations

He Guang-Qiang (何广强), Zeng Gui-Hua (曾贵华)   

  1. 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
  • Received:2005-10-05 Revised:2006-02-25 Online:2006-06-20 Published:2006-06-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 60472018).

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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 $\Delta I=I(\alpha,\beta)-I(\alpha,\epsilon)$ 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

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.

Key words: quantum key distribution, continuous variable EPR correlation, Gaussian modulation

中图分类号:  (Quantum communication)

  • 03.67.Hk
03.67.Mn (Entanglement measures, witnesses, and other characterizations) 42.50.-p (Quantum optics)