Fibre Wavelength Quantum Networks (FQNet)

量子通信可以保证数据传输的安全性。虽然实现这一点的技术已经在专用的点对点链路上得到了证明，但只有多用户量子网络才能实现全部潜力。量子中继提供了一个可以实现这一点的平台，允许量子密钥在光纤网络上传送。商业应用需要在1550 nm左右的最佳电信波长波段内运行的实用纠缠光源，由于InnovateUK资助的一个既定项目，这种来源首次出现。我们的愿景是构建和运行这样的量子中继，使实用的量子网络成为现实的机会。通过将合作伙伴的成熟专业知识和经验与具有挑战性的工作计划相结合，我们将创造出一代改进的纠缠光子对光源，用于与激光相互作用。外延材料将在谢菲尔德大学生长，并在剑桥大学加工成一系列新颖的器件结构。一个原型量子中继器将由TREL提供，它将利用我们独特的纠缠光源，传送编码在激光束上的量子信息，作为实用量子网络的演示。

Quantum communications can guarantee the security of data transmission. Although the technology to achieve this isproven over dedicated point-to-point links, the full potential will only be realised with multi-user quantum networks.Quantum relays offer a platform which can provide this, allowing quantum keys to be teleported across fibre-optic networks.Commercial uptake requires practical entangled light sources operating within the optimum telecom wavelength bandaround 1550 nm, and thanks to an established InnovateUK funded project, such sources are emerging for the first time.Our vision is to construct and operate such a quantum relay, making practical quantum networks a realistic opportunity. Bycombining the proven expertise and experience of the partners together with a challenging workplan, we will create animproved generation of entangled photon-pair light sources engineered to interact with laser light. Epitaxial material will begrown at the University of Sheffield and processed into a range of novel device structures at the University of Cambridge. Aprototype quantum relay will be delivered by TREL, which will leverage our unique entangled light sources, to teleportquantum information encoded on laser beams, as demonstration of a practical quantum network.