论文标题
控制feshbach Dimers浴中充电杂质的性质
Controlling the nature of a charged impurity in a bath of Feshbach dimers
论文作者
论文摘要
从理论上讲，我们研究了被困的离子的动力学，该动力学浸入了由Feshbach共振产生的弱结合原子二聚体的超速气体中。使用准古典模拟，我们发现，根据二聚体的结合能，从二聚体解离到分子离子的形成。交叉的位置在很大程度上取决于碰撞能量和保罗陷阱的时间依赖性场。深度绑定的二聚体会导致快速分子离子形成，速率接近langevin碰撞率$γ'_ \ text {l} \ act4.8 \ oft4.8 \ times10^{ - 9} \，$ cm $^3 $ s $ s $^{ - 1} $。所产生的分子离子的动能能量中位数低于$ 1 \ $ mk，因此它们将保持在离子陷阱中。我们得出的结论是，相互作用的离子和Feshbach分子可以为创建具有精确光谱和量子化学应用的超速分子离子提供新的方法。
We theoretically study the dynamics of a trapped ion that is immersed in an ultracold gas of weakly bound atomic dimers created by a Feshbach resonance. Using quasi-classical simulations, we find a crossover from dimer dissociation to molecular ion formation depending on the binding energy of the dimers. The location of the crossover strongly depends on the collision energy and the time-dependent fields of the Paul trap. Deeply bound dimers lead to fast molecular ion formation, with rates approaching the Langevin collision rate $Γ'_\text{L}\approx4.8\times10^{-9}\,$cm$^3$s$^{-1}$. The kinetic energies of the created molecular ions have a median below $1\,$mK, such that they will stay confined in the ion trap. We conclude that interacting ions and Feshbach molecules may provide a novel approach towards the creation of ultracold molecular ions with applications in precision spectroscopy and quantum chemistry.
