Deterministic Time-Bin Entanglement between a Single Photon and an Atomic Ensemble.
Deterministic Time-Bin Entanglement between a Single Photon and an Atomic Ensemble.
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DOI：
10.1103/physrevlett.128.060502
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发表时间：
2021-08
影响因子：
8.6
通讯作者：
Peng-Fei Sun;Yong Yu;Z. An;Jun Li;Chao-Wei Yang;Xiao-Hui Bao;Jian-Wei Pan
中科院分区：
文献类型：
--
作者：
Peng-Fei Sun;Yong Yu;Z. An;Jun Li;Chao-Wei Yang;Xiao-Hui Bao;Jian-Wei Pan
物质-光子混合纠缠是量子网络的基石。如果纠缠能以很高的概率制备出来，这是非常有利的。在这封信中，我们报道了利用里德堡封锁在原子系综和单光子之间创造确定性的纠缠。我们设计了一种方案，利用循环恢复和修补过程，在单个光子的时间模和承载集体激发的里德堡能级之间创建纠缠。通过将原子激发恢复为第二个光子并进行关联测量来测试混合纠缠，结果表明纠缠保真度为87.8%。我们的物质-光子纠缠源将以更高的效率实现远程量子存储器的纠缠。
Hybrid matter-photon entanglement is the building block for quantum networks. It is very favorable if the entanglement can be prepared with a high probability. In this Letter, we report the deterministic creation of entanglement between an atomic ensemble and a single photon by harnessing the Rydberg blockade. We design a scheme that creates entanglement between a single photon's temporal modes and the Rydberg levels that host a collective excitation, using a process of cyclical retrieving and patching. The hybrid entanglement is tested via retrieving the atomic excitation as a second photon and performing correlation measurements, which suggest an entanglement fidelity of 87.8%. Our source of matter-photon entanglement will enable the entangling of remote quantum memories with much higher efficiency.