Hybrid systems of laser-cooled trapped ions and ultracold atoms combined in a single
experimental setup have recently emerged as a new platform for fundamental research in …

Trapped neutral atoms have become a prominent platform for quantum science, where
entanglement fidelity records have been set using highly excited Rydberg states. However …

Isolating neutral and charged particles from the environment is essential in precision
experiments. For decades, this has been achieved by trapping ions with radio-frequency …

Rydberg atoms immersed in a Bose-Einstein condensate interact with the quantum gas via
electron-atom and ion-atom interaction. To suppress the typically dominant electron-neutral …

Trapped ions are ideally suited for precision spectroscopy, as is evident from the remarkably
low systematic uncertainties of single-ion clocks. The major weakness of these clocks is the …

We report the trapping of ultracold neutral Rb atoms and Ba+ ions in a common optical
potential in absence of any radio frequency (rf) fields. We prepare Ba+ at 370 μ K and …

We study the long-range interaction of a single ion with a highly excited ultracold Rydberg
atom and report on the direct observation of an ion-induced Rydberg excitation blockade …

The electronic and motional degrees of freedom of trapped ions can be controlled and
coherently coupled on the level of individual quanta. Assembling complex quantum systems …

Long trapping times, as well as low heating and decoherence rates, essentially isolating
individual particles from the environment, are crucial ingredients for controlling these …

We propose a novel experimental method to extend the investigation of ion-atom collisions
from the so far studied cold, essentially classical regime to the ultracold, quantum regime …