Quantum secure communication using continuous variable Einstein-Podolsky-Rosen correlations

Guangqiang He, Jun Zhu, and Guihua Zeng

Phys. Rev. A 73, 012314 – Published 11 January 2006

Abstract

A quantum secure communication protocol using correlations of continuous variable Einstein-Podolsky-Rosen (EPR) pairs is proposed. The proposed protocol may implement both quantum key distribution and quantum message encryption by using a nondegenerate optical parametric amplifier (NOPA). The general Gaussian-cloner attack strategy is investigated in detail by employing Shannon information theory. Results show that the proposed scheme is secure, which is guaranteed physically by the correlations of the continuous variable EPR entanglement pairs generated by the NOPA.

Received 9 October 2005

DOI:https://doi.org/10.1103/PhysRevA.73.012314

Authors & Affiliations

Guangqiang He^*, Jun Zhu^†, and Guihua Zeng^‡

State Key Lab of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030, China

^*Electronic address: gqhe@sjtu.edu.cn
^†Electronic address: bierhoff̱24@126.com
^‡Electronic address: ghzeng@sjtu.edu.cn

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Vol. 73, Iss. 1 — January 2006

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Physical Review A

covering atomic, molecular, and optical physics and quantum information