Cold hybrid ion-atom systems

M Tomza, K Jachymski, R Gerritsma, A Negretti… - Reviews of modern …, 2019 - APS
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 …

High-fidelity entanglement and detection of alkaline-earth Rydberg atoms

IS Madjarov, JP Covey, AL Shaw, J Choi, A Kale… - Nature Physics, 2020 - nature.com
Trapped neutral atoms have become a prominent platform for quantum science, where
entanglement fidelity records have been set using highly excited Rydberg states. However …

Trapping ions and atoms optically

T Schaetz - Journal of Physics B: Atomic, Molecular and Optical …, 2017 - iopscience.iop.org
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 …

Ionic impurity in a bose-einstein condensate at submicrokelvin temperatures

KS Kleinbach, F Engel, T Dieterle, R Löw, T Pfau… - Physical review …, 2018 - APS
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 …

Controlling systematic frequency uncertainties at the level in linear Coulomb crystals

J Keller, T Burgermeister, D Kalincev, A Didier… - Physical Review A, 2019 - APS
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 …

Optical traps for sympathetic cooling of ions with ultracold neutral atoms

J Schmidt, P Weckesser, F Thielemann, T Schaetz… - Physical review …, 2020 - APS
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 …

Observation of Rydberg blockade induced by a single ion

F Engel, T Dieterle, T Schmid, C Tomschitz, C Veit… - Physical Review Letters, 2018 - APS
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 …

Optical trapping of ion coulomb crystals

J Schmidt, A Lambrecht, P Weckesser, M Debatin… - Physical review X, 2018 - APS
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 lifetimes and effective isolation of ions in optical and electrostatic traps

A Lambrecht, J Schmidt, P Weckesser, M Debatin… - Nature …, 2017 - nature.com
Long trapping times, as well as low heating and decoherence rates, essentially isolating
individual particles from the environment, are crucial ingredients for controlling these …

Rydberg molecules for ion-atom scattering in the ultracold regime

T Schmid, C Veit, N Zuber, R Löw, T Pfau, M Tarana… - Physical review …, 2018 - APS
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 …