论文标题
电信光子与$^{171} $ yb $^{3+} $之间的1250模式之间的非古典相关性的远程分布：y $ _2 $ _2 $ sio $ _ {5} $ crystal
Remote distribution of non-classical correlations over 1250 modes between a telecom photon and a $^{171}$Yb$^{3+}$:Y$_2$SiO$_{5}$ crystal
论文作者
论文摘要
基于预言纠缠的量子中继器需要能够在记忆和电信光子之间产生多模量子相关的量子节点。通信速率与模式数量线性缩放，但是高度多模量子存储仍然具有挑战性。在这项工作中，我们展示了一个原子频率梳量子存储器，据我们所知，量子域模式的时域模式容量为1250模式，带宽为100 MHz，据我们所知，量子制度中存储的最多数量的模式。内存基于$ y_ {2} sio_ {5} $ Crystal用$^{171} yb^{3+} $ ions掺杂，内存波长为979 nm。内存与979和1550 nm的非分类光子对源连接，带宽与量子存储器匹配。我们在所有模式上都获得了强大的非古典二阶跨相关性，用于$ 25 $ $μs$的存储时间。电信光子在释放记忆光子之前通过5 km的纤维传播，这是基于预示的纠缠和前馈操作的量子中继器的关键能力。在此实验的基础上，应允许在远程量子节点之间分布纠缠，并由于高模具容量而提高了速率。
Quantum repeaters based on heralded entanglement require quantum nodes that are able to generate multimode quantum correlations between memories and telecommunication photons. The communication rate scales linearly with the number of modes, yet highly multimode quantum storage remains challenging. In this work, we demonstrate an atomic frequency comb quantum memory with a time-domain mode capacity of 1250 modes and a bandwidth of 100 MHz, to our knowledge the largest number of modes stored in the quantum regime. The memory is based on a $Y_{2}SiO_{5}$ crystal doped with $^{171}Yb^{3+}$ ions, with a memory wavelength of 979 nm. The memory is interfaced with a source of non-degenerate photon pairs at 979 and 1550 nm, bandwidth-matched to the quantum memory. We obtain strong non-classical second-order cross correlations over all modes, for storage times of up to $25$ $μs$. The telecommunication photons propagated through 5 km of fiber before the release of the memory photons, a key capability for quantum repeaters based on heralded entanglement and feed-forward operations. Building on this experiment should allow distribution of entanglement between remote quantum nodes, with enhanced rates owing to the high multimode capacity.
