Katrin Dulitz

Abstract Tailored light–matter interactions in the strong coupling regime enable the manipulation and control of quantum systems with up to unit efficiency1,2, with applications ranging from quantum information to photochemistry3,4,5,6,7.

Abstract Femtosecond coherent multidimensional spectroscopy is demonstrated for an ultracold gas. A setup for phase modulation spectroscopy is used to probe the 32S1/2–22P1/2,3/2 transition in an $800\,\mathrm{\mu}$K-cold sample of 7Li atoms confined in a magneto-optical trap. The observation of a double quantum coherence response, a signature of interparticle interactions, paves the way for detailed investigations of few- and many-body effects in ultracold gases using this technique.

Being the element with the highest electronegativity, fluorine is reactive with a wide range of chemical compounds. Due to its high reactivity, atomic fluorine is often used in reaction-dynamics studies of fast radical reactions. For instance, recent studies show its significance in revealing dynamical resonances and resonance-induced quantum tunneling in the reaction F + H2.1,21. X. Yang and D. H. Zhang, Acc. Chem. Res. 41, 981 (2008). https://doi.org/10.1021/ar700258g2. T. Yang, L. Huang, C. Xiao, J.