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Updated: Jun 28, 2025

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Microgram BaCl2 ablation targets for trapped ion experiments.

Noah Greenberg1, Akbar Jahangiri Jozani1, Collin J C Epstein1

  • 1Institute for Quantum Computing and Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.

The Review of Scientific Instruments
|April 18, 2024
PubMed
Summary
This summary is machine-generated.

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Researchers developed a new method for creating barium chloride ablation targets, improving neutral atom production for quantum computing. This technique enhances the reliable loading of radioactive 133Ba+ ions in trapped ion systems.

Area of Science:

  • Quantum information processing
  • Atomic physics
  • Materials science

Background:

  • Trapped ions are crucial for quantum information processing, with barium ions showing high fidelity operations.
  • The 133Ba+ isotope is ideal for quantum computing but is radioactive, requiring microgram quantities.
  • Existing methods for preparing 133Ba+ ablation targets have limitations in neutral atom production.

Purpose of the Study:

  • To develop and compare novel methods for fabricating microgram barium chloride (BaCl2) ablation targets.
  • To enhance the production of neutral barium atoms for isotope-selective loading in trapped ion experiments.
  • To improve the consistency and reliability of 133Ba+ ion loading for scalable quantum computing.

Main Methods:

  • Fabrication of BaCl2 ablation targets using two distinct recipes.

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  • Heat-treatment of ablation targets to optimize neutral atom yield.
  • Characterization of target uniformity using energy-dispersive X-ray spectroscopy and neutral fluorescence collection.

    • Main Results:

    • Demonstrated two recipes for creating BaCl2 ablation targets.
    • Showed that heat-treatment significantly increases the consistency of neutral atom production.
    • Characterized target uniformity using trap-independent methods, confirming material quality.

    Conclusions:

    • The developed fabrication methods provide a reliable pathway for producing neutral barium atoms.
    • Consistent neutral atom production is key for successful isotope-selective loading of 133Ba+ ions.
    • This work advances the potential for scalable quantum computing using the 133Ba+ isotope in surface traps.