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一个基于纠的波长多重化量子通信网络
Sören Wengerowsky1,2, Siddarth Koduru Joshi3,4,5, Fabian Steinlechner3,4,6,7
1Institute for Quantum Optics and Quantum Information-Vienna, Austrian Academy of Sciences, Vienna, Austria. Soeren.Wengerowsky@oeaw.ac.at.
Nature
|December 14, 2018
概括
我们开发了一种新的量子网络架构, 这种被动,可扩展的设计可以最大限度地减少资源使用,并提高更广泛的量子网络应用的通信速度.
科学领域:
- 量子通信
- 网络安全
- 纠分布
背景情况:
- 量子密钥分布 (QKD) 已经成熟,
- 目前QKD仅限于双方通信.
- 将QKD扩展到多个用户是一个重大挑战.
研究的目的:
- 提供可扩展的多用户量子网络架构.
- 从一个单一来源向许多用户提供安全的量子密钥.
- 在不影响安全的情况下,尽量减少每个用户的资源需求.
主要方法:
- 一个全新的,完全连接的量子网络架构被设计出来.
- 使用单一的双极化纠源.
- 纠的光子被多重化成12个波长通道, 分发给四个用户.
主要成果:
- 通过使用单个纠源来证明一个具有四个用户的完全连接网络.
- 该系统使用波长复合和被动光学组件.
- 网络架构在不修改源代码的情况下可扩展,增强安全性并减少信任要求.
结论:
- 提出的架构展示了可扩展的多用户量子网络的可行方法.
- 这种被动,资源高效的设计为高速量子通信提供了潜力.
- 这种方法克服了以前多用户QKD系统的局限性.


