Resonance enhanced isotope-selective photoionization of YbI for ion trap loading

钡离子阱的光电离和光电负载

Photoionization and Photoelectric Loading of Barium Ion Traps

简单而有效的技术，用于加载钡离子到线性保罗陷阱证明。中性钡的两步光电离是使用一个弱的相互组合线（6s2 1S0 <->6s6p 3P1，791 nm），然后通过使用氮气体激光器（337 nm）的电离阈值以上的激发。同位素选择性是通过使用近多普勒自由几何激发的三重态6s6p 3P1状态。此外，我们报告了一个特别简单和有效的陷阱加载技术，采用昂贵的UV环氧固化灯产生光电子。

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

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 materia…

Efficient photoionization for barium ion trapping using a dipole-allowed resonant two-photon transition

Two efficient and isotope-selective resonant two-photon ionization techniques for loading barium ions into radio-frequency (RF)-traps are demonstrated. The scheme of using a strong dipole-allowed transition at λ=553 nm as a first step towards ionization is compared to the established technique of using a weak intercombination line (λ=413 nm). An increase of two orders of magnitude in the ionization efficiency is found favoring the transition at 553 nm. This technique can be implemented using commercial all-solid-state laser systems and is expected to be advantageous compared to other narrowban…

利用自电离共振实现七倍效率增强的 Ba⁺ 囚禁

Trapping $\mathbf{Ba}^+$ with Seven-fold Enhanced Efficiency Utilizing an Autoionizing Resonance

针对囚禁离子量子计算机中离子装载缓慢的问题，本文比较两种 ¹³⁸Ba⁺ 同位素选择性光电离方案，证明利用自电离跃迁的两步法可将装载率提高近一个数量级，且仅需增加商用二极管激光器。

表面电极阱冷离子亮源

Bright Source of Cold Ions for Surface-Electrode Traps

我们在表面电极的Paul阱中通过激光冷却原子的光电离产生大量低能离子。$4\times10^{5}$ Yb $^{+}$离子/s的同位素选择性陷阱加载速率超过通过原子束的光电离（电子碰撞电离）获得的速率四（六）个数量级。浅至0.13 eV的陷阱很容易用这种技术加载。离子被限制在与激光冷却原子相同的空间区域内，这将允许实验研究冷离子与冷原子或玻色-爱因斯坦凝聚体之间的相互作用。

从低温缓冲气体束加载的大型镉原子磁光阱

A large magneto-optical trap of cadmium atoms loaded from a cryogenic buffer gas beam

利用229 nm深紫外跃迁和低温氦缓冲气体束，克服光电离损耗实现了大型镉原子磁光阱，为极性AlF分子的激光冷却奠定了基础。