We argue that long optical storage times are required to establish entanglement at high rates over large distances using memory-based quantum repeaters. Triggered by this conclusion, we investigate the $795.325{\mathrm{nm}}^3$ ${\mathrm{H}}_6\leftrightarrow {{}^3\mathrm{H}}_4$ transition of $\mathrm{Tm}:{\mathrm{Y}}_3{\text{Ga}}_5{\mathrm{O}}_{12}$ (Tm:YGG). Most importantly, we find that the optical coherence time can reach 1.1 ms, and, using laser pulses, we demonstrate optical storage based on the atomic frequency comb protocol during up to $100\mu \mathrm{s}$ as well as a memory decay time $T_m$ of $13.1\mu \mathrm{s}$. Possibilities of how to narrow the gap between the measured value of $T_m$ and its maximum of $275\mu \mathrm{s}$ are discussed. In addition, we demonstrate multiplexed storage, including with feed-forward selection, shifting and filtering of spectral modes, as well as quantum state storage using members of nonclassical photon pairs. Our results show the potential of Tm:YGG for creating multiplexed quantum memories with long optical storage times, and open the path to repeater-based quantum networks with high entanglement distribution rates.

中文翻译：

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用于高速量子中继器的长寿命固态光存储器

我们认为，使用基于存储器的量子中继器在远距离上以高速率建立纠缠需要较长的光学存储时间。受此结论的触发，我们调查了$795.325{\mathrm{纳米}}^3$ ${\mathrm{H}}_6\leftrightarrow {{}^3\mathrm{H}}_4$ 的过渡 $\mathrm{Tm值}：{\mathrm{是}}_3{\text{嘎}}_5{\mathrm{哦}}_{12}$(Tm:YGG)。最重要的是，我们发现光学相干时间可以达到 1.1 ms，并且使用激光脉冲，我们展示了基于原子频率梳协议的光学存储在长达$100\mu \mathrm{秒}$ 以及记忆衰退时间 ${吨}_{米}$ 的 $13.1\mu \mathrm{秒}$. 如何缩小测量值之间的差距的可能性${吨}_{米}$ 及其最大值 $275\mu \mathrm{秒}$进行了讨论。此外，我们展示了多路存储，包括光谱模式的前馈选择、移位和过滤，以及使用非经典光子对成员的量子状态存储。我们的结果显示了 Tm:YGG 在创建具有长光学存储时间的多路复用量子存储器方面的潜力，并为具有高纠缠分布率的基于中继器的量子网络开辟了道路。