Measurement of Dipole Matrix Elements with a Single Trapped Ion
Measurement of Dipole Matrix Elements with a Single Trapped Ion
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DOI：
10.1103/physrevlett.115.143003
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发表时间：
2015-10-02
影响因子：
8.6
通讯作者：
Poschinger, U. G.
中科院分区：
文献类型：
--
作者：
Hettrich, M.;Ruster, T.;Poschinger, U. G.
我们展示了一种通过比较色散和吸收光离子相互作用的测量来确定偶极矩阵元素的方法。我们测量了属于Ca II H线的矩阵元素，即Ca-40（+）的4(2)S(1/2) 4(2)P（1/2）跃迁，我们发现其值为2.8928(43)ea(0)。此外，该方法使我们能够推断出4(2)P（1/2）态的寿命为6.904(26)ns，这与最近的理论计算预测一致，并解决了计算值与实验结果之间长期存在的差异。
We demonstrate a method to determine dipole matrix elements by comparing measurements of dispersive and absorptive light ion interactions. We measure the matrix element pertaining to the Ca II H line, i.e., the 4(2)S(1/2) 4(2)P(1/2) transition of Ca-40(+), for which we find the value 2.8928(43) ea(0). Moreover, the method allows us to deduce the lifetime of the 4(2)P(1/2) state to be 6.904(26) ns, which is in agreement with predictions from recent theoretical calculations and resolves a long-standing discrepancy between calculated values and experimental results.