Minimizing rf-induced excess micromotion of a trapped ion with the help of ultracold atoms

Abstract

We report on the compensation of excess micromotion due to parasitic rf-electric fields in a Paul trap. The parasitic rf-electric fields stem from the Paul trap drive but cause excess micromotion, e.g. due to imperfections in the setup of the Paul trap. We compensate these fields by applying rf-voltages of the same frequency but adequate phases and amplitudes to Paul trap electrodes. The magnitude of micromotion is probed by studying elastic collision rates of the trapped ion with a gas of ultracold neutral atoms. Furthermore, we demonstrate that also reactive collisions can be used to quantify micromotion. We achieve compensation efficiencies of about 1${\text{Vm}}^{-1}$, which is comparable to other conventional methods.

arXiv comment8 pages, 6 figures

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Cited by in corpus (5)

• Cold hybrid ion-atom systems
• Scalable and Parallel Tweezer Gates for Quantum Computing with Long Ion Strings
• Life and death of a cold BaRb${}^{+}$ molecule inside an ultracold cloud of Rb atoms
• Ultracold ion-atom experiments: cooling, chemistry, and quantum effects
• Micromotion minimization using Ramsey interferometry