Telecommunication wavelength quantum repeater

这是一个对长距离量子通信的主力--量子中继器的实现进行实验和理论研究的项目。中继器将由作为存储元件的超冷原子系综组成。量子中继器基于将光子通信通道与信息存储元件接口。拟议活动的基石是：(I)通过原子级联跃迁合成远程通信波长光子和长寿命原子存储，以及(Ii)原子存储元件的多路复用，以显著改善对存储寿命的依赖。这些创新解决了早期量子中继器架构的关键困难。量子网络的通信速率在很大程度上取决于存储元件的存储时间。在较短的存储时间内，多路传输可以将这些速率提高许多个数量级。拟议的多路复用量子中继器将使量子通信能够极大地减少对存储器寿命的需求。这些目标提出了根本的挑战，并将对量子信息领域的未来发展产生重大影响。除了提供从根本上更安全的通信方式外，量子网络还可能为分布式量子计算提供结构。该项目的完成将导致在电信光纤上开发新的长途通信工具。该项目将涉及广泛的学生培训和参与，包括本科生和少数群体。

This is a project is of experimental and theoretical research towards the realization of the quantum repeater, the workhorse of long-distance quantum communication. The repeater will consist of ultracold atomic ensembles as memory elements. The quantum repeater is based on interfacing photonic communication channels with information storage elements. The cornerstones of the proposed activity are: (I) the synthesis of telecommunication wavelength photons and long-lived atomic storage, via atomic cascade transitions, and (II) the multiplexing of atomic memory elements to drastically ameliorate the dependence on storage lifetime. These innovations address key difficulties of earlier quantum repeater architectures. The communication rate of a quantum network depends critically on the storage time of the memory elements. Multiplexing can increase these rates by many orders of magnitude for short memory times. The proposed multiplexed quantum repeater will enable quantum telecommunication with very significantly reduced memory lifetime demands. The goals present essential challenges and will have a significant influence on the future development of the field of quantum information. Besides offering fundamentally more secure ways to communicate, quantum networks may provide the structure for distributed quantum computation. The completion of this program will result in the development of new tools for long-distance communication over telecommunication fiber. The project will involve extensive student training and participation, including undergraduate students and minority groups.