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arXiv · 2002.09602

Cesium $nD_{J}$+$6S_{1/2}$ Rydberg molecules and their permanent electric dipole moments

Suying Bai·Xiaoxuan Han·Jingxu Bai·Yuechun Jiao·Jianming Zhao·Suotang Jia·Georg Raithel
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Abstract

Cs$_2$ Rydberg-ground molecules consisting of a Rydberg, $nD_{J}$ (33 $\leq$ $n$ $\leq$ 39), and a ground state atom, 6$S_{1/2} (F=$3 or 4$)$, are investigated by photo-association spectroscopy in a cold atomic gas. We observe vibrational spectra that correspond to triplet $^T\Sigma$ and mixed $^{S,T}\Sigma$ molecular states. We establish scaling laws for the energies of the lowest vibrational states vs principal quantum number and obtain zero-energy singlet and triplet $s$-wave scattering lengths from experimental data and a Fermi model. Line broadening in electric fields reveals the permanent molecular electric-dipole moments; measured values agree well with calculations. We discuss the negative polarity of the dipole moments, which differs from previously reported cases.

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Suying Bai, Xiaoxuan Han, Jingxu Bai, Yuechun Jiao, Jianming Zhao, Suotang Jia, Georg Raithel. 2020-02-22. Cesium $nD_{J}$+$6S_{1/2}$ Rydberg molecules and their permanent electric dipole moments. https://doi.org/10.1103/physrevresearch.2.033525

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