Quadrupole imaging and cooling paper

We demonstrated background-free imaging and single-photon sideband cooling for a single Cs atom trapped in an optical tweezer. This is a significant advancement in neutral-alkali atoms, as previously there weren't any narrow lines used for imaging/cooling. This paper also discusses how one can drive quadrupole transitions transferring two units of angular momentum using a single photon by either a focused Gaussian beam or a vortex beam generated via an SLM. Here's the link to the arXiv article: https://arxiv.org/abs/2505.10540v1