Institut für Quantenoptik und Quanteninformation (IQOQI), Österreichische Akademie der Wissenschaften, 6020 Innsbruck, Austria.
Institut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck, Austria.
Phys Rev Lett. 2018 Jun 1;120(22):223001. doi: 10.1103/PhysRevLett.120.223001.
We report a measurement of the dynamical polarizability of dysprosium atoms in their electronic ground state at the optical wavelength of 1064 nm, which is of particular interest for laser trapping experiments. Our method is based on collective oscillations in an optical dipole trap, and reaches unprecedented accuracy and precision by comparison with an alkali atom (potassium) as a reference species. We obtain values of 184.4(2.4) and 1.7(6) a.u. for the scalar and tensor polarizability, respectively. Our experiments have reached a level that permits meaningful tests of current theoretical descriptions and provides valuable information for future experiments utilizing the intriguing properties of heavy lanthanide atoms.
我们报告了在光学波长为 1064nm 的情况下，对基态镝原子的动态极化率的测量，这对于激光捕获实验特别感兴趣。我们的方法基于在光偶极阱中的集体振荡，并通过与碱金属原子（钾）作为参考物质进行比较，达到了前所未有的精度。我们分别得到了标量和张量极化率的数值为 184.4(2.4)和 1.7(6)a.u.。我们的实验已经达到了可以对当前理论描述进行有意义的测试的水平，并为未来利用重镧系原子的有趣性质的实验提供了有价值的信息。
