67 citations · 195 across the 15 of their papers we have counts for
10 papers · 1 filter
Automation in quantum logic experiments with cold molecular ions
Richard Karl, Meissa Diouf, Aleksandr Shlykov +2
Modern experiments with cold molecular ions have reached a high degree of complexity requiring frequent sample preparation, state initialization and protocol execution while demand…
The role of spectator modes in the quantum-logic spectroscopy of single trapped molecular ions
Mikolaj Roguski, Aleksandr Shlykov, Ziv Meir +1
Quantum-logic spectroscopy has become an increasingly important tool for the state detection and readout of trapped atomic and molecular ions which do not possess easily accessible…
Ion counting and temperature determination of Coulomb-crystallized laser-cooled ions in traps using convolutional neural networks
Yanning Yin, Stefan Willitsch
Coulomb crystals -- ordered structures of cold ions confined in ion traps -- find applications in a variety of research fields. The number and temperature of the ions forming the C…
Coupling trapped ions to a nanomechanical oscillator
Moritz Weegen, Martino Poggio, Stefan Willitsch
Cold ions in traps are well-established, highly controllable quantum systems with a wide variety of applications in quantum information, precision spectroscopy, clocks and chemistr…
Cold trapped molecular ions and hybrid platforms for ions and neutral particles
Markus Deiß, Stefan Willitsch, Johannes Hecker Denschlag
We review recent progress in the field of cold trapped molecular ions. A new generation of collision and cold chemistry experiments between atoms and ions has emerged, where cold a…
Experimental implementation of laser cooling of trapped ions in strongly inhomogeneous magnetic fields
Christian Mangeng, Yanning Yin, Richard Karl +1
We demonstrate the Doppler laser cooling of Ca ions confined in a segmented linear Paul trap in the presence of a strong quadrupolar magnetic field generated by two perm…
Optimized strategies for the quantum-state preparation of single trapped nitrogen molecular ions
Aleksandr Shlykov, Mikolaj Roguski, Stefan Willitsch
This work examines optimized strategies for the preparation of single molecular ions in well-defined rotational quantum states in an ion trap with the example of the molecular nitr…
Charge transfer of polyatomic molecules in ion-atom hybrid traps: Stereodynamics in the millikelvin regime
Alexandre Voute, Alexander Dörfler, Laurent Wiesenfeld +4
Rate constants for the charge transfer reaction between NH and Rb in the mK regime are measured in an ion-atom hybrid trap and are found to be lower than the Langev…
Superstatistical energy distributions of an ion in an ultracold buffer gas
I. Rouse, S. Willitsch
An ion in a radiofrequency ion trap interacting with a buffer gas of ultracold neutral atoms is a driven dynamical system which has been found to develop a non-thermal energy distr…
Optimised surface-electrode ion-trap junctions for experiments with cold molecular ions
Arezoo Mokhberi, Roman Schmied, Stefan Willitsch
We discuss the design and optimisation of two types of junctions between surface-electrode radiofrequency ion-trap arrays that enable the integration of experiments with sympatheti…