使用带有混沌半导体激光器的快速物理随机比特发生器进行的差分相移量子密钥分发实验。

Differential-phase-shift quantum key distribution experiment using fast physical random bit generator with chaotic semiconductor lasers.

作者信息

Honjo Toshimori, Uchida Atsushi, Amano Kazuya, Hirano Kunihito, Someya Hiroyuki, Okumura Haruka, Yoshimura Kazuyuki, Davis Peter, Tokura Yasuhiro

机构信息

NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato Wakamiya, Atsugi-shi,Kanagawa, 243-0198, Japan.

出版信息

Opt Express. 2009 May 25;17(11):9053-61. doi: 10.1364/oe.17.009053.

DOI:10.1364/oe.17.009053

PMID:19466155

Abstract

A high speed physical random bit generator is applied for the first time to a gigahertz clocked quantum key distribution system. Random phase-modulation in a differential-phase-shift quantum key distribution (DPS-QKD) system is performed using a 1-Gbps random bit signal which is generated by a physical random bit generator with chaotic semiconductor lasers. Stable operation is demonstrated for over one hour, and sifted keys are successfully generated at a rate of 9.0 kbps with a quantum bit error rate of 3.2% after 25-km fiber transmission.

摘要

一种高速物理随机比特发生器首次应用于千兆赫兹时钟的量子密钥分发系统。在差分相移量子密钥分发（DPS-QKD）系统中，利用由具有混沌半导体激光器的物理随机比特发生器产生的1 Gbps随机比特信号进行随机相位调制。演示了超过一小时的稳定运行，并且在25公里光纤传输后，以9.0 kbps的速率成功生成了筛选密钥，量子误码率为3.2%。