远距离量子通信实验中的高维纠缠源  

High-dimensional entanglement for long distance quantum communication

作　　者：印娟[1] 钱勇[1] 李晓强[1] 包小辉[1] 彭承志[1] 杨涛[1] 潘阁生[1] 

机构地区：[1]中国科学技术大学近代物理系,合肥微尺度物质科学国家实验室,合肥230026

出　　处：《物理学报》2011年第6期58-62,共5页Acta Physica Sinica

摘　　要：设计了适用于远距离量子通信实验的高维纠缠源.利用连续激光器抽运产生了极化-时间两体四维纠缠光子对,在抽运功率20mW下测到每秒700对符合,保真度为89%±3%.相比已有的高维纠缠源,在本文中发展的源具有传输便利、相位稳定性好等优点,适用于未来远距离高维量子通信实验和量子力学基本问题实验检验,如远距离高维量子密码实验、两粒子Greenberger-Horne-Zeilinger定理检验、两粒子量子赝"心灵感应"(quantum pseudo telepathy)实验演示等.In this paper, we provide a scheme to generate a high-dimensional entanglement source for long distance quantum communication. We utilize a continuous wave pump laser to produce polarization-time two-body four-dimensional entangled photon pairs. Under 20 mW of pump power, we achieve 700 entangled photon pairs per second with a fidelity of 89%±3%. Compared with other known high dimension entangled sources, the developed source in the paper is easy to transmit over a long distance and its phase stability is easy to achieve. Therefore, the source is more suited for the future long distance high-dimensional quantum communication tasks and testing the quantum nonlocality, for example, long distance high dimensional quantum key distribution, experimental testing two-particle Greenberger-Horne-Zeilinger theorem, implementation of two-particle quantum pseudo telepathy, etc.

关 键 词：高维纠缠 极化纠缠 时间箱纠缠 量子通信 

分 类 号：O431.2[机械工程—光学工程] TN911[理学—光学]