Telecom-band photonic quantum memories for networks

未来的量子互联网将需要能够有效地、按需地产生、存储和检索纠缠光子。该项目将研究量子光源，包括量子点单光子源和非线性双模压缩态光源，重点研究在电信波长发射的光源。该项目还将探索在电信波段运行的基于集成的原子存储器，该存储器可以存储和检索这些光的量子态。这两个组件代表了可扩展量子网络的关键构建块。在这个项目中，我们将解决几个关键挑战，包括光子源和存储器的工作波长和带宽的匹配；延长量子存储器的存储寿命；减少两个系统的过量噪音；提高整个系统的端到端效率。我们还将探索存储器的其他应用，例如作为相干滤波器来提高检索光子的质量，以及作为物理神经网络的一个元素。

The quantum internet of the future will require the capability to generate, store and retrieve entangled photons efficiently and on demand. This project will work on quantum light sources, including quantum dot single photon sources, and nonlinear two-mode squeezed state sources, with a focus on sources that emit at telecommunication wavelengths. This project will also explore ensemble-based atomic memories operating in the telecommunication band which can store and retrieve these quantum states of light. These two components represent the key building blocks of a scalable quantum network. There are several key challenges that we will address in this project, including matching of the operational wavelengths and bandwidths of the photon sources and memories; extending the lifetime of storage in the quantum memories; reducing excess noise in both systems; and improving the total system end-to-end efficiency. We will also explore other applications of the memory such as acting a coherent filter for improving the quality of the retrieved photons, and as an element of a physical neural network.