论文标题
MGH $^+$ $离子与He原子所困的内部旋转的碰撞冷却：量子建模符合库仑晶体的实验
Collisional cooling of internal rotation in MgH$^+$ ions trapped with He atoms: Quantum modeling meets experiments in Coulomb crystals
论文作者
论文摘要
使用AB ITIOL计算的势能表面（PES）与He（$^1 $ S）原子的MGH $^+$（$^1σ$）离子的电子相互作用，我们计算了来自多通道散射问题的量子处理的相关状态变化的旋转旋转弹性碰撞截面。我们专注于在较早的冷离子陷阱实验中讨论的当前合作伙伴（见下文）的量子动力学，我们希望详细建模。分子离子下部旋转状态之间计算的相应变化率被用来描述时间进化动力学，然后在库仑结晶的MGH $^+$（$^1σ$）上进行了最新的实验，在该实验中，将离子旋转通过在上升到He as a Bufferers As a Bufferers As a Bufferers as a Buffererages of Bufferers of Buffererage。实验中最终离子旋转温度的当前计算模型证明，它们的观察值和点在离子的旋转温度和热温度之间的快速平衡上非常吻合。
Using the ab initio computed Potential Energy Surface (PES) for the electronic interaction of the MgH$^+$ ($^1Σ$) ion with the He($^1$S) atom, we calculate the relevant state-changing rotationally inelastic collision cross sections from a quantum treatment of the multichannel scattering problem. We focus on the quantum dynamics at the translationally low energies for the present partners discussed in the earlier, cold ion trap experiments (see below) which we wish to model in detail. The corresponding state-changing rates computed between the lower rotational states of the molecular ion are employed to describe the time-evolution kinetics followed by recent experiments on Coulomb-crystalized MgH$^+$ ($^1Σ$), where the ions are rotationally cooled by micromotion tuning after the uploading into the trap of He as a buffer gas. The present computational modeling of the final ions' rotational temperatures in the experiments turns out to agree very well with their observations and points at a fast equilibration between rotational and thermal temperatures of the ions.
