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arXiv · 2303.02143

Ablation loading of barium ions into a surface electrode trap

X. Shi·S. L. Todaro·G. L. Mintzer·C. D. Bruzewicz·J. Chiaverini·I. L. Chuang
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Abstract

Trapped-ion quantum information processing may benefit from qubits encoded in isotopes that are practically available in only small quantities, e.g. due to low natural abundance or radioactivity. Laser ablation provides a method of controllably liberating neutral atoms or ions from low-volume targets, but energetic ablation products can be difficult to confine in the small ion-electrode distance, micron-scale, microfabricated traps amenable to high-speed, high-fidelity manipulation of ion arrays. Here we investigate ablation-based ion loading into surface-electrode traps of different sizes to test a model describing ion loading probability as a function of effective trap volume and other trap parameters. We demonstrate loading of ablated and photoionized barium in two cryogenic surface-electrode traps with 730 $\mu$m and 50 $\mu$m ion-electrode distances. Our loading success probability agrees with a predictive analytical model, providing insight for the confinement of limited-quantity species of interest for quantum computing, simulation, and sensing.

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X. Shi, S. L. Todaro, G. L. Mintzer, C. D. Bruzewicz, J. Chiaverini, I. L. Chuang. 2023-03-03. Ablation loading of barium ions into a surface electrode trap. https://doi.org/10.1063/5.0149778

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