论文标题
电信波长的纯且难以区分的单光子源
A Pure and indistinguishable single-photon source at telecommunication wavelength
论文作者
论文摘要
在电信波长处发出纯净和难以区分的光子的按需单光子源是用于部署基于光纤量子网络的关键资产。实际上，单个光子可以用作飞行量子，从而可以在长距离内传达量子信息。嵌入GAA中的自组装INAS量子点构成了高质量单光子的绝佳确定性来源，但是绝大多数来源在900-950 nm波长范围内运行，排除了它们在量子网络中的采用。 Here, we present a quantum frequency conversion scheme for converting single photons from quantum dots to the telecommunication C band, around 1550 nm, achieving 40.8% end-to-end efficiency, while maintaining both high purity and a high degree of indistinguishability during conversion with measured values of $g^{(2)}(0)=2.4\%$ and $ v^{\ text {corr}} = 94.8 \％$。
On-demand single-photon sources emitting pure and indistinguishable photons at the telecommunication wavelength are a critical asset towards the deployment of fiber-based quantum networks. Indeed, single photons may serve as flying qubits, allowing communication of quantum information over long distances. Self-assembled InAs quantum dots embedded in GaAs constitute an excellent nearly deterministic source of high quality single photons, but the vast majority of sources operate in the 900-950 nm wavelength range, precluding their adoption in a quantum network. Here, we present a quantum frequency conversion scheme for converting single photons from quantum dots to the telecommunication C band, around 1550 nm, achieving 40.8% end-to-end efficiency, while maintaining both high purity and a high degree of indistinguishability during conversion with measured values of $g^{(2)}(0)=2.4\%$ and $V^{\text{corr}}=94.8\%$, respectively.
