Telecommunication wavelength quantum repeater

这是一个实验和理论研究项目，旨在实现量子中继器，远程量子通信的主力。 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信道与信息存储元件连接。拟议活动的基石是：（I）通过原子级联跃迁合成电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，以大幅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难题。量子网络的通信速率关键取决于存储器元件的存储时间。 多路复用可以在短存储时间内将这些速率提高许多数量级。所提出的多路复用量子中继器将使量子通信具有非常显著降低的存储器寿命需求。 这些目标提出了重要的挑战，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，量子网络还可以为分布式量子计算提供结构。该计划的完成将导致通过电信光纤进行长距离通信的新工具的开发。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.