论文标题

带电的Ultrang-Range Rydberg Trimers

Charged ultralong-range Rydberg trimers

论文作者

Bosworth, Daniel J., Hummel, Frederic, Schmelcher, Peter

论文摘要

我们表明,最近观察到的远距离离子 - rydberg分子可以分为两个状态家族,它们的特征是它们由离子诱导的量子缺陷rydbit rydberg $ n $ n $ p个州的离子诱导的混合物产生的独特的电子结构,具有不同的低田间寻求高型号高$ l $ $ $ $。我们预测,在这两种情况下,这些双重分子状态都可以结合位于rydberg电子轨道内的其他基态原子,从而形成带有类似于常规非极性ULRM的结合能的带电的超范围Rydberg分子(ULRM)。为了证明这一点,我们考虑了一个与单个基态原子和离子相互作用的rydberg原子。额外的原子打破了系统的圆柱形对称性,这导致在否则将脱钩的状态之间的混合。电子结构是在有限的基础上使用精确的对角线化获得的,并使用多配置时间依赖的Hartree方法确定振动结构。由于电子密度的叶状结构,可能是三个核的线性和非线性几何构型的结合三聚体。预测的三聚体结合能和激发序列与使用当前的实验技术观察到的离子 - rydberg二聚体相差足够不同。

We show that the recently observed class of long-range ion-Rydberg molecules can be divided into two families of states, which are characterised by their unique electronic structures resulting from the ion-induced admixture of quantum defect-split Rydberg $n$P states with different low-field seeking high-$l$ states. We predict that in both cases these diatomic molecular states can bind additional ground state atoms lying within the orbit of the Rydberg electron, thereby forming charged ultralong-range Rydberg molecules (ULRM) with binding energies similar to that of conventional non-polar ULRM. To demonstrate this, we consider a Rydberg atom interacting with a single ground state atom and an ion. The additional atom breaks the system's cylindrical symmetry, which leads to mixing between states that would otherwise be decoupled. The electronic structure is obtained using exact diagonalisation over a finite basis and the vibrational structure is determined using the Multi-Configuration Time-Dependent Hartree method. Due to the lobe-like structure of the electronic density, bound trimers with both linear and nonlinear geometrical configurations of the three nuclei are possible. The predicted trimer binding energies and excitation series are distinct enough from those of the ion-Rydberg dimer to be observed using current experimental techniques.

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