Direct Measurement of the van der Waals Interaction between Two Rydberg Atoms
Direct Measurement of the van der Waals Interaction between Two Rydberg Atoms
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DOI：
10.1103/physrevlett.110.263201
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发表时间：
2013-06-24
影响因子：
8.6
通讯作者：
Browaeys, A.
中科院分区：
文献类型：
--
作者：
Beguin, L.;Vernier, A.;Browaeys, A.
我们报道了两个孤立的，单个里德伯原子之间的货车德瓦耳斯相互作用的直接测量，由几微米的控制距离分开。工作在一个制度，其中的单原子拉比频率激发的里德伯态是可比的相互作用，我们观察到部分里德伯封锁，从而不同的两个原子状态的时间依赖的人口表现出几个频率的相干振荡。定量比较的数据与一个简单的模型的基础上的光学布洛赫方程，使我们能够提取的货车的德瓦尔斯能量，并观察其特征的C-6/R-6的依赖性。测得的C-6系数符合从头计算，我们观察到它们的显着增加与里德堡态的主量子数n。
We report the direct measurement of the van der Waals interaction between two isolated, single Rydberg atoms separated by a controlled distance of a few micrometers. Working in a regime where the single-atom Rabi frequency for excitation to the Rydberg state is comparable to the interaction, we observe partial Rydberg blockade, whereby the time-dependent populations of the various two-atom states exhibit coherent oscillations with several frequencies. Quantitative comparison of the data with a simple model based on the optical Bloch equations allows us to extract the van der Waals energy, and observe its characteristic C-6/R-6 dependence. The measured C-6 coefficients agree well with ab initio calculations, and we observe their dramatic increase with the principal quantum number n of the Rydberg state.