Experimental realization of fast ion separation in segmented Paul traps
Experimental realization of fast ion separation in segmented Paul traps
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DOI：
10.1103/physreva.90.033410
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发表时间：
2014-05
影响因子：
2.9
通讯作者：
T. Ruster;C. Warschburger;H. Kaufmann;C. Schmiegelow;A. Walther;M. Hettrich;A. Pfister;V. Kaushal;F. Schmidt-Kaler;U. Poschinger
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文献类型：
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作者：
T. Ruster;C. Warschburger;H. Kaufmann;C. Schmiegelow;A. Walther;M. Hettrich;A. Pfister;V. Kaushal;F. Schmidt-Kaler;U. Poschinger
我们的实验证明快速分离的两个离子晶体中的微结构分段保罗陷阱。通过使用光谱校准例程的静电阱电位，我们实现了所需的精确控制的离子轨迹附近的\textit{临界点}，其中的谐波约束由外部电位消失。分离过程可以由三个参数控制：静态电位倾斜、临界点处的电压偏移和过程的总持续时间。我们展示了如何通过测量离子距离、陷阱频率和最终的运动激发来优化控制参数。在80 μ s的分离持续时间，我们实现了最小的平均激发$\bar{n} = 4.16（0.16）$振动量子每离子，这是一致的绝热极限给出我们的特定陷阱。我们表明，快速分离时间，振荡运动被激发，而一个主要的热状态得到很长一段时间。所提出的技术不依赖于特定的圈闭几何参数，因此可用于不同的分段圈闭。
We experimentally demonstrate fast separation of a two-ion crystal in a microstructured segmented Paul trap. By the use of spectroscopic calibration routines for the electrostatic trap potentials, we achieve the required precise control of the ion trajectories near the \textit{critical point}, where the harmonic confinement by the external potential vanishes. The separation procedure can be controlled by three parameters: A static potential tilt, a voltage offset at the critical point, and the total duration of the process. We show how to optimize the control parameters by measurements of ion distances, trap frequencies and the final motional excitation. At a separation duration of $80 \mu$s, we achieve a minimum mean excitation of $\bar{n} = 4.16(0.16)$ vibrational quanta per ion, which is consistent with the adiabatic limit given by our particular trap. We show that for fast separation times, oscillatory motion is excited, while a predominantly thermal state is obtained for long times. The presented technique does not rely on specific trap geometry parameters and can therefore be adopted for different segmented traps.