Continuous variable quantum key distribution based on optical entangled states without signal modulation

被引：47

作者：

Su, Xiaolong ^{[1
]}

Wang, Wenzhe ^{[1
]}

Wang, Yu ^{[1
]}

Jia, Xiaojun ^{[1
]}

Xie, Changde ^{[1
]}

Peng, Kunchi ^{[1
]}

机构：

[1] Shanxi Univ, State Key Lab Quantum Opt & Quantum Opt Devices, Inst Optoelect, Taiyuan 030006, Peoples R China

来源：

EPL | 2009年 / 87卷 / 02期

基金：

山西省青年科学基金;

关键词：

RECONCILIATION; CRYPTOGRAPHY;

D O I：

10.1209/0295-5075/87/20005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this paper, we present the first experimental demonstration on continuous variable quantum key distribution using determinant Einstein-Podolsky-Rosen entangled states of optical field. By means of the instantaneous measurements of the quantum fluctuations of optical modes, respectively, distributed at sender and receiver, the random bits of secret key are obtained without the need for signal modulation. The post-selection boundaries for the presented entanglement-based scheme against both Gaussian collective and individual attacks are theoretically concluded. The final secret key rates of 84 kbits/s and 3 kbits/s are completed under the collective attack for the transmission efficiency of 80% and 40%, respectively. Copyright (C) EPLA, 2009

引用

页数：6

共 36 条

[1] Quantum key distribution with continuous variables [J].