论文标题
库仑晶体中黑暗离子的数字分辨检测
Number-Resolved Detection of Dark Ions in Coulomb Crystals
论文作者
论文摘要
虽然通过荧光成像来计算激光冷却的离子，但要检测嵌入的暗离子的数量并在混合离子晶体中交感冷却的数量更具挑战性。我们演示了一种以单粒子灵敏度实时跟踪黑暗离子数量的方法。这是通过观察从冷却液离子发出的荧光量的同时观察到令人兴奋的黑暗离子的世俗运动共振的荧光量来实现的。通过计算荧光步骤的数量，我们可以在不校准的情况下识别黑离子的数量，而无需依赖任何运动激发的物理模型。我们通过检测H $ _2^+$和h $ _3^+$ ions嵌入在be $^+$ $ ion colomb Crystal中的H $ _2^+$和H $ _3^+$ ions来演示该方案。我们的方法允许同时观察不同类型离子的单个离子的产生和破坏。除了黑暗离子的高分辨率光谱外，另一种应用是用单粒子敏感性实时检测化学反应。这在这项工作中得到了证明。
While it is straightforward to count laser-cooled trapped ions by fluorescence imaging, detecting the number of dark ions embedded and sympathetically cooled in a mixed ion crystal is more challenging. We demonstrate a method to track the number of dark ions in real time with single-particle sensitivity. This is achieved by observing discrete steps in the amount of fluorescence emitted from the coolant ions while exciting secular motional resonances of dark ions. By counting the number of fluorescence steps, we can identify the number of dark ions without calibration and without relying on any physical model of the motional excitation. We demonstrate the scheme by detecting H$_2^+$ and H$_3^+$ ions embedded in a Be$^+$ ion Coulomb crystal in a linear radio frequency trap. Our method allows observing the generation and destruction of individual ions simultaneously for different types of ions. Besides high-resolution spectroscopy of dark ions, another application is the detection of chemical reactions in real time with single-particle sensitivity. This is demonstrated in this work.
