Decoherence-Assisted Spectroscopy of a Single Mg+ Ion
Decoherence-Assisted Spectroscopy of a Single Mg+ Ion
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DOI：
10.1103/physrevlett.112.113003
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发表时间：
2014-03-17
影响因子：
8.6
通讯作者：
Schaetz, T.
中科院分区：
文献类型：
--
作者：
Clos, G.;Enderlein, M.;Schaetz, T.
我们描述了一种高分辨率的光谱方法，其中检测的单激发事件是增强了两个基态的叠加的相干性的完全丧失。因此，几乎静止的单个孤立原子的跃迁以高信噪比被有效地记录。光谱显示对称的线形，没有来自光谱探针的杂散光背景。我们采用这种方法对Mg-25（+）离子分别测量了从3S基态到3 P、3D和4P激发态的单光子、双光子和三光子跃迁频率。我们的结果是相关的天体物理学和搜索的漂移的基本常数。此外，该方法可以扩展到其他过渡，同位素和物种。目前达到的分数频率不确定度为5 × 10（-9），不受该方法的限制。
We describe a high-resolution spectroscopy method in which the detection of single excitation events is enhanced by a complete loss of coherence of a superposition of two ground states. Thereby, transitions of a single isolated atom nearly at rest are recorded efficiently with high signal-to-noise ratios. Spectra display symmetric line shapes without stray-light background from spectroscopy probes. We employ this method on a Mg-25(+) ion to measure one-, two-, and three-photon transition frequencies from the 3S ground state to the 3P, 3D, and 4P excited states, respectively. Our results are relevant for astrophysics and searches for drifts of fundamental constants. Furthermore, the method can be extended to other transitions, isotopes, and species. The currently achieved fractional frequency uncertainty of 5 x 10(-9) is not limited by the method.