论文标题
探测Rydberg Atomic合奏产生的单光子的不可区分性
Probing the indistinguishability of single photons generated by Rydberg atomic ensembles
论文作者
论文摘要
我们研究了从冷原子团中的集体rydberg激发中获取的单个光子的不可区分性。 Rydberg自旋波是通过对Rydberg状态的谐振两光激发或Rydberg电磁诱导的透明度创建的。为了评估产生的单个光子的不可区分性，我们在光子和弱相干状态之间进行hong-ou-mandel实验。我们分析了单个光子作为检测窗口的函数的不可区分性，对于非谐振激发产生的光子，我们推断出高的不可区分性值从全波形的89％到小型检测窗口的98％。以同样的方式，我们还首次研究了Rydberg EIT生成的单个光子的不可区分性，显示的值低于与异位激发产生的单个光子相对应的值。这些结果与将Rydberg原子作为量子网络节点的使用有关。
We investigate the indistinguishability of single photons retrieved from collective Rydberg excitations in cold atomic ensembles. The Rydberg spin waves are created either by off resonant two-photon excitation to the Rydberg state or by Rydberg electromagnetically induced transparency. To assess the indistinguishability of the generated single photons, we perform Hong-Ou-Mandel experiments between the single photons and weak coherent states of light. We analyze the indistinguishability of the single photons as a function of the detection window and for photons generated by off-resonant excitation we infer high value of indistinguishability going from 89% for the full waveform to 98% for small detection windows. In the same way, we also investigate for the first time the indistinguishability of single photons generated by Rydberg EIT, showing values lower than those corresponding to single photons generated by off-resonant excitation. These results are relevant for the use of Rydberg atoms as quantum network nodes.
