标题： 通过相干运动的捕获离子状态检测 显示英文标题

标题： Trapped-Ion State Detection through Coherent Motion

摘要： 量子限制实验中，被捕获的原子离子依赖于检测离子状态的敏感方法。 当前的检测技术仅适用于相对简单的系统，这排除了大多数原子和分子种类。 在此，我们展示了一种可以应用于更大类别的离子系统的技术。 我们将一个“光谱”离子（Al+）与同一陷阱中的一个“控制”离子（Mg+）耦合，并通过非共振激光激发光谱离子来实现状态检测，这种激发诱导了相干运动。 运动振幅取决于光谱离子的状态，可以通过时间分辨光子计数或分辨边带激发来测量。 第一种方法提供了一种简化的方法来区分Al+中的“钟”态，避免了基态冷却和边带跃迁。 第二种方法减少了光谱离子的自发辐射和光学抽运，我们通过非破坏性地区分Al+的1S0基态中的Zeeman子能级来证明这一点。 显示英文摘要

摘要： Quantum-limited experiments with trapped atomic ions rely on sensitive methods of detecting an ion's state. Current detection techniques are applicable only to relatively simple systems, which precludes most atomic and molecular species. Here, we demonstrate a technique that can be applied to a larger class of ion systems. We couple a "spectroscopy" ion (Al+) to a "control" ion (Mg+) in the same trap and perform state detection through off-resonant laser excitation of the spectroscopy ion that induces coherent motion. The motional amplitude, dependent on the spectroscopy ion state, is measured either by time-resolved photon counting, or by resolved sideband excitations. The first method provides a simplified way to distinguish "clock" states in Al+, which avoids ground state cooling and sideband transitions. The second method reduces spontaneous emission and optical pumping on the spectroscopy ion, which we demonstrate by nondestructively distinguishing Zeeman sublevels in the 1S0 ground state of Al+.