Wolf Fabian
Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany.
Phys Rev Lett. 2024 Feb 23;132(8):083202. doi: 10.1103/PhysRevLett.132.083202.
Optical atomic clocks based on trapped ions suffer from systematic frequency shifts of the clock transition due to interaction with blackbody radiation from the environment. These shifts can be compensated if the blackbody radiation spectrum and the differential dynamic polarizability is known to a sufficient precision. Here, we present a new measurement scheme, based on quantum logic that allows a direct transfer of precision for polarizability measurements from one species to the other. This measurement circumvents the necessity of calibrating laser power below the percent level, which is the limitation for state-of-the-art polarizability measurements in trapped ions. Furthermore, the presented technique allows one to reference the polarizability transfer to hydrogenlike ions for which the polarizability can be calculated with high precision.
基于囚禁离子的光原子钟会因与环境黑体辐射相互作用而遭受时钟跃迁的系统频率偏移。如果黑体辐射光谱和微分动态极化率已知精度足够高，这些偏移是可以补偿的。在此，我们提出一种基于量子逻辑的新测量方案，该方案允许将极化率测量的精度直接从一个物种转移到另一个物种。这种测量避免了校准低于百分之一水平激光功率的必要性，而这是囚禁离子中现有极化率测量的限制。此外，所提出的技术允许将极化率转移参考到类氢离子，其极化率可以高精度计算。
