Storage of multiple single-photon pulses emitted from a quantum dot in a solid-state quantum memory.
Storage of multiple single-photon pulses emitted from a quantum dot in a solid-state quantum memory.
复制标题
固态量子存储器中量子点发射的多个单光子脉冲的存储
DOI：
10.1038/ncomms9652
复制
发表时间：
2015-10-15
影响因子：
16.6
通讯作者：
Guo GC
中科院分区：
文献类型：
--
作者：
Tang JS;Zhou ZQ;Wang YT;Li YL;Liu X;Hua YL;Zou Y;Wang S;He DY;Chen G;Sun YN;Yu Y;Li MF;Zha GW;Ni HQ;Niu ZC;Li CF;Guo GC
量子中继器是在传输过程中不可避免地存在光学损耗的情况下远距离分配纠缠的关键部件。受Duan-Lukin-Cirac-Zoller协议的启发，人们提出了许多改进的基于量子存储的量子中继器协议，它们通常关注纠缠分配率。在这些协议中，消除多个光子(或多个光子对)和使用多模量子存储器被证明有能力极大地提高纠缠分配率。在这里，我们演示了从量子点发出的确定性单光子在保偏固态量子存储器中的存储；此外，还展示了具有1、20和100个窄单光子脉冲的多时相模式存储器。消除了多个光子，每个脉冲中最多包含一个光子。此外，这两个子系统的固态属性使这种配置更稳定，更易于扩展。我们的工作将有助于构建基于全固态器件的高效量子中继器。量子中继器是长距离分配纠缠的关键部件，可以通过消除多光子对事件来改进量子中继器。在这里，作者演示了在偏振保持的固态存储器中存储由量子点发出的单光子。
Quantum repeaters are critical components for distributing entanglement over long distances in presence of unavoidable optical losses during transmission. Stimulated by the Duan–Lukin–Cirac–Zoller protocol, many improved quantum repeater protocols based on quantum memories have been proposed, which commonly focus on the entanglement-distribution rate. Among these protocols, the elimination of multiple photons (or multiple photon-pairs) and the use of multimode quantum memory are demonstrated to have the ability to greatly improve the entanglement-distribution rate. Here, we demonstrate the storage of deterministic single photons emitted from a quantum dot in a polarization-maintaining solid-state quantum memory; in addition, multi-temporal-mode memory with 1, 20 and 100 narrow single-photon pulses is also demonstrated. Multi-photons are eliminated, and only one photon at most is contained in each pulse. Moreover, the solid-state properties of both sub-systems make this configuration more stable and easier to be scalable. Our work will be helpful in the construction of efficient quantum repeaters based on all-solid-state devices. Quantum repeaters are critical components for distributing entanglement over long distances, and they can be improved by the elimination of multi-photon-pair events. Here, the authors demonstrate the storage of single photons emitted by a quantum dot in a polarization maintaining solid-state memory.