论文标题
高带宽腔内原子的拉曼成像
Raman Imaging of Atoms Inside a High-bandwidth Cavity
论文作者
论文摘要
高带宽，基于纤维的光腔是未来量子网络的有前途的构件。它们被用来共鸣固定量子位，例如单个或多个原子，并以高速率将光子将量子信息路由到光纤网络中。在高带宽腔中，由于percell效应强烈抑制全向荧光，因此在原子腔共振线上进行了用于控制原子位置的标准荧光成像受到损害。在这里，我们通过检测通过连续和三维拉曼侧带冷却产生的杂色荧光来恢复$^{87} $ rb原子与这种纤维Fabry-Pérot腔的强烈耦合。我们已经对影响拉曼共鸣的围绕降低光移位进行了详细的光谱研究，取决于强度和失调。我们的分析确定了成像信号噪声比与生存率之间的折衷方案，其中获得了对偶极力波动在捕获原子的加热动态中的作用的物理洞察力。
High-bandwidth, fiber-based optical cavities are a promising building block for future quantum networks. They are used to resonantly couple stationary qubits such as single or multiple atoms with photons routing quantum information into a fiber network at high rates. In high-bandwidth cavities, standard fluorescence imaging on the atom-cavity resonance line for controlling atom positions is impaired since the Purcell effect strongly suppresses all-directional fluorescence. Here, we restore imaging of $^{87}$Rb atoms strongly coupled to such a fiber Fabry-Pérot cavity by detecting the repumper fluorescence which is generated by continuous and three-dimensional Raman sideband cooling. We have carried out a detailed spectroscopic investigation of the repumper-induced differential light shifts affecting the Raman resonance, dependent on intensity and detuning. Our analysis identifies a compromise regime between imaging signal-to-noise ratio and survival rate, where physical insight into the role of dipole-force fluctuations in the heating dynamics of trapped atoms is gained.
