Isotope-Selective Laser Ablation Ion-Trap Loading of ${}^{137}{\mathrm{Ba}}^{+}$ using a ${\mathrm{BaCl}}_2$ Target

Abstract

The ${}^{133}{\mathrm{Ba}}^{+}$ ion is a promising candidate as a high-fidelity qubit, and the ${}^{137}{\mathrm{Ba}}^{+}$ isotope is promising as a high-fidelity qudit ($d>2$). Barium metal is very reactive, and ${}^{133}{\mathrm{Ba}}^{+}$ is radioactive and can only be sourced in small quantities, so the most commonly used loading method, oven heating, is less suited for barium, and is currently not possible for ${}^{133}{\mathrm{Ba}}^{+}$.Pulsed laser ablation solves both of these problems by utilizing compound barium sources, while also giving some distinct advantages, such as fast loading, less displaced material, and lower heat load near the ion trap. Because of the relatively low abundances of the isotopes of interest, a two-step photoionization technique is used, which gives us the ability to selectively load isotopes. Characterization of the ablation process for our ${\mathrm{BaCl}}_2$ targets are presented, including observation of neutral and ion ablation-fluence regimes, preparation/conditioning and lifetimes of ablation spots, and plume velocity distributions.We show that using laser ablation on ${\mathrm{BaCl}}_2$ salt targets with a two-step photoionization method, we can produce and trap barium ions reliably. Further, we demonstrate that with our photoionization method, we can trap ${}^{137}{\mathrm{Ba}}^{+}$ with an enhanced selectivity compared to its natural abundance.

arXiv comment24 pages, 21 figures

References in corpus (32)

• Trapped-Ion Quantum Computing: Progress and Challenges
• High-fidelity two-qubit quantum logic gates using trapped calcium-43 ions
• High-fidelity quantum logic gates using trapped-ion hyperfine qubits
• High-Fidelity Universal Gate Set for ${}^9$Be${}^{+}$ Ion Qubits
• Microwave quantum logic gates for trapped ions
• Multi-Element Logic Gates for Trapped-Ion Qubits
• Isotope-selective photo-ionization for calcium ion trapping
• Practical trapped-ion protocols for universal qudit-based quantum computing
• Robust entanglement gates for trapped-ion qubits
• Hybrid quantum logic and a test of Bell's inequality using two different atomic isotopes
• High fidelity manipulation of a qubit built from a synthetic nucleus
• Resilient entanglement gates for trapped ions
• Electrodynamically trapped Yb+ ions for quantum information processing
• Laser ablation loading of a surface-electrode ion trap
• Electron impact ionization loading of a surface electrode ion trap
• Benchmarking a high-fidelity mixed-species entangling gate
• Bright Source of Cold Ions for Surface-Electrode Traps
• Laser ablation loading of a radiofrequency ion trap
• An all-optical ion-loading technique for scalable microtrap architectures
• Photoionization and Photoelectric Loading of Barium Ion Traps
• Isotope shifts of the 4s2 1S0 -> 4s5p 1P1 transition and hyperfine splitting of the 4s5p 1P1 state in calcium
• Dual-Species, Multi-Qubit Logic Primitives for Ca+/Sr+ Trapped-Ion Crystals
• Spectroscopy of a synthetic trapped ion qubit
• Sympathetic cooling and detection of a hot trapped ion by a cold one
• Hyperfine and Optical Barium Ion Qubits
• Efficient photoionization for barium ion trapping using a dipole-allowed resonant two-photon transition
• Cryogenic ${}^9$Be${}^{+}$ Penning trap for precision measurements with (anti-)protons
• Resonance enhanced isotope-selective photoionization of YbI for ion trap loading
• All-optical ion generation for ion trap loading
• Laser ablation production of Ba, Ca, Dy, Er, La, Lu, and Yb ions
• A short response-time atomic source for trapped ion experiments
• Two-color photoionization of calcium using SHG and LED light

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• Absorption Spectroscopy of ${}^{40}$Ca Atomic Beams Produced via Pulsed Laser Ablation: A Quantitative Comparison of Ca and CaTiO${}_3$ Targets
• Preparing pure ${}^{43}$Ca${}^{+}$ samples in an ion trap with photoionization and parametric excitations
• Direct measurement of isotope shifts in the barium 6s${}^2$ ${}^1$S${}_0$-5d6p ${}^3$D${}_1^{\text{o}}$ transition