论文标题
通过状态选择的光电位捕获，塑形和分离离子库仑晶体
Trapping, Shaping and Isolating of Ion Coulomb Crystals via State-selective Optical Potentials
论文作者
论文摘要
对于传统的离子陷阱，捕获电位与电子状态无关，从而为离子提供了限制，主要取决于其电荷与质量比$ q/m $。相反，将离子储存在光学偶极子陷阱中会导致状态依赖性限制。在这里，我们在实验中研究了$^{138} \ Mathrm {ba}^+$ ions的光学偶极电位，存储在532 nm和1064 nm处的两个独特的陷阱中。我们在$ 6 \ mathrm {s} _ {\ Mathrm {1/2}} $电子地面或$ 5 \ Mathrm {d} _ {\ Mathrm {3/2}} $ 5 \/$ 5 \ MATHRM {D} $ ative and Mather and Mather and Mathrm antim ant implention和Mathip antir中和潜力的极性。一方面，尽管所有离子共享相同的$ Q/m $，但我们将发现结果选择性地从库仑晶体中删除离子。另一方面，我们确定性地净化了高能轨道中寄生离子的捕获体积，从而使库仑晶体可靠地分离到射频陷阱内的单个离子。
For conventional ion traps, the trapping potential is close to independent of the electronic state, providing confinement for ions dependent primarily on their charge-to-mass ratio $Q/m$. In contrast, storing ions within an optical dipole trap results in state-dependent confinement. Here we experimentally study optical dipole potentials for $^{138}\mathrm{Ba}^+$ ions stored within two distinctive traps operating at 532 nm and 1064 nm. We prepare the ions in either the $6\mathrm{S}_{\mathrm{1/2}}$ electronic ground or the $5\mathrm{D}_{\mathrm{3/2}}$/ $5\mathrm{D}_{\mathrm{5/2}}$ metastable excited state and probe the relative strength and polarity of the potential. On the one hand, we apply our findings to selectively remove ions from a Coulomb crystal, despite all ions sharing the same $Q/m$. On the other hand, we deterministically purify the trapping volume from parasitic ions in higher-energy orbits, resulting in reliable isolation of Coulomb crystals down to a single ion within a radio-frequency trap.
