Theory of long-range interactions for Rydberg states attached to hyperfine-split cores
Theory of long-range interactions for Rydberg states attached to hyperfine-split cores
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DOI：
10.1103/physreva.97.022508
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发表时间：
2017-11
影响因子：
2.9
通讯作者：
Francis Robicheaux;Francis Robicheaux;Donald Booth;M. Saffman
中科院分区：
文献类型：
--
作者：
Francis Robicheaux;Francis Robicheaux;Donald Booth;M. Saffman
当原子有一个里德堡电子连接到超精细分裂核态时，该理论被发展为单原子和双原子相互作用。这种情况与一些被提议用于里德堡-里德堡相互作用实验的稀土和碱土原子有关。对于稀土原子，核心电子可以具有非常大的总角动量$J$和非零的核自旋$I$。在碱土原子中，有一个单一的，$S的核心电子，它的自旋可以耦合到奇数同位素的非零核自旋。由此产生的核心态的超精细分裂可能导致附加到不同阈值的里德堡级数之间的实质性混合。与未受扰动的碱原子Rydberg级数相比，不同宇宙态的级数扰动和近似简并可能导致单原子Rydberg性质(极化率、塞曼混合和分裂等)以及Rydberg-Rydberg相互作用($C5$和$C6$矩阵)的性质不同。
The theory is developed for one and two atom interactions when the atom has a Rydberg electron attached to a hyperfine split core state. This situation is relevant for some of the rare earth and alkaline earth atoms that have been proposed for experiments on Rydberg-Rydberg interactions. For the rare earth atoms, the core electrons can have a very substantial total angular momentum, $J$, and a non-zero nuclear spin, $I$. In the alkaline earth atoms there is a single, $s$, core electron whose spin can couple to a non-zero nuclear spin for odd isotopes. The resulting hyperfine splitting of the core state can lead to substantial mixing between the Rydberg series attached to different thresholds. Compared to the unperturbed Rydberg series of the alkali atoms, the series perturbations and near degeneracies from the different parity states could lead to qualitatively different behavior for single atom Rydberg properties (polarizability, Zeeman mixing and splitting, etc) as well as Rydberg-Rydberg interactions ($C_5$ and $C_6$ matrices).