论文标题
线性保罗陷阱中被困离子的二阶多普勒频移
Second-order Doppler frequency shifts of trapped ions in a linear Paul trap
论文作者
论文摘要
已经研究了实验和分子动力学（MD）模拟的线性Paul陷阱中二阶多普勒频移（SODF）的准确评估。陷阱中捕获离子的运动具有三个贡献，我们专注于离子过量微功能，在评估SODFS时很少讨论。基于以下假设：离子密度在径向方向上均匀分布，我们提出了一个新模型，以准确评估离子微波钟的总SODF。该模型的有效性已在模拟和实验中得到验证，尤其是对于温度小于100 mk的离子集合。我们认为，我们的新模型在准确评估离子陷阱的SODF方面具有优势，尤其是基于大离子云的激光冷却离子微波钟的SODF。
The accurate evaluation of the second-order Doppler frequency shift (SODFS) of trapped ions in a linear Paul trap has been studied with experiments and molecular dynamics (MD) simulations. The motion of trapped ions in the trap has three contributions, and we focus on the ion excess micromotion, which is rarely discussed when evaluating the SODFS. Based on the hypothesis that the ion density is uniformly distributed in the radial direction, we propose a new model to accurately evaluate the total SODFS for ion microwave clocks. The effectiveness of the model has been verified both in simulation and experiment, especially for ion ensemble with temperature less than 100 mK. We believe that our new model offers advantages in accurately evaluating the SODFS for the ion trap, especially those of laser-cooled ion microwave clocks based on large ion clouds.
