论文标题
改进的光 - 物质相互作用，用于存储掺杂晶体的量子状量子状态
Improved Light-Matter Interaction for Storage of Quantum States of Light in a Thulium-Doped Crystal Cavity
论文作者
论文摘要
我们使用基于thulium掺杂的y $ _3 $ al $ _5 $ _5 $ o $ o $ _ {12} $（tm：yag）晶体的整体腔设计和实施793 nm波长光子的原子频率梳子量子内存。近似阻抗匹配导致在500 MHz带宽上吸收大约$ 90 \％$的输入光子和记忆效率（27.5 $ \ pm 2.7）％。使用量子记忆方案，腔增强可导致对TM掺杂晶体的先前效率的显着提高。反过来，这使我们首次在这种内存中存储和回忆量子状态。我们的结果表明，具有较大时间带宽产品的单个光子量子位和量子网络的多模式容量的有效和忠实存储的进展。
We design and implement an atomic frequency comb quantum memory for 793 nm wavelength photons using a monolithic cavity based on a thulium-doped Y$_3$Al$_5$O$_{12}$ (Tm:YAG) crystal. Approximate impedance matching results in the absorption of approximately $90\%$ of input photons and a memory efficiency of (27.5$\pm$ 2.7)% over a 500 MHz bandwidth. The cavity enhancement leads to a significant improvement over the previous efficiency in Tm-doped crystals using a quantum memory protocol. In turn, this allows us for the first time to store and recall quantum states of light in such a memory. Our results demonstrate progress toward efficient and faithful storage of single photon qubits with large time-bandwidth product and multi-mode capacity for quantum networking.
