Observation of singlet-scattering channels in long-range Rydberg dimers

29th International Conference on Photonic, Electronic, and Atomic Collisions

Deiglmayr, Johannes^1 ; Saßmannshausen, Heiner^1 ; Merkt, Frédéric^1

Laboratory of Physical Chemistry, ETH Zrich, Zurich

CH-8093, Switzerland^1

关键词: Effective Hamiltonian;    Ground-state atoms;    Hyperfine interactions;    Rydberg molecules;    S-wave scattering;    S-wave scattering lengths;    Scattering channels;    Spin orbit interactions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/2/022075/pdf
DOI  :  10.1088/1742-6596/635/2/022075

来源: IOP

【 摘 要 】

We report on the observation of long-range Cs2Rydberg molecules consisting of a p-state Rydberg atom and a ground-state atom. Two types of molecular states are visible in the photoassociation spectra: states bound purely by triplet s-wave scattering and states bound by mixed singlet-triplet s-wave scattering. An effective Hamiltonian including s-wave scattering pseudopotentials, the hyperfine interaction of the ground-state atom, and the spin-orbit interaction of the Rydberg atom reproduces the experimental observations. The detailed analysis reveals the important role of singlet scattering in long-range Rydberg molecules and yields an effective singlet s-wave scattering length for low-energy e--Cs collisions.