论文标题
热原子气中的单光子兼容电信-C波段量子记忆
A Single-Photon-compatible Telecom-C-Band Quantum Memory in a Hot Atomic Gas
论文作者
论文摘要
与电信C波段兼容的量子光学状态的有效存储和按需检索是对将来基于陆地的量子光学网络的要求。 C波段中的频谱可以最大程度地减少光纤渗透损失，并且宽阔的光学带宽有助于高速网络协议。在这里，我们报告电信波长和带宽兼容量子内存。使用热$^{87} $ rb Vapor中的非谐振级联吸收协议，我们证明了总存储效率为$ 20.90（1）\，\％$，多普勒限制的存储时间为$ 1.10（2）\，$ ns。我们以弱相干状态表征内存性能，证明了高于$ 4.5（6）\ times10^{ - 6} $的平均光子数输入的信噪比大于统一性。
The efficient storage and on-demand retrieval of quantum optical states that are compatible with the telecommunications C-band is a requirement for future terrestrial-based quantum optical networking. Spectrum in the C-band minimises optical fiber-propagation losses, and broad optical bandwidth facilitates high-speed networking protocols. Here we report on a telecommunication wavelength and bandwidth compatible quantum memory. Using the Off-Resonant Cascaded Absorption protocol in hot $^{87}$Rb vapour, we demonstrate a total memory efficiency of $20.90(1)\,\%$ with a Doppler-limited storage time of $1.10(2)\,$ns. We characterise the memory performance with weak coherent states, demonstrating signal-to-noise ratios greater than unity for mean photon number inputs above $4.5(6)\times10^{-6}$ per pulse.
