The DPG Spring Meeting in Hannover had to be cancelled! Read more ...
Parts | Days | Selection | Search | Updates | Downloads | Help
A: Fachverband Atomphysik
A 28: Poster Session - Atomic Physics IV
A 28.6: Poster
Thursday, March 12, 2020, 16:00–18:00, Empore Lichthof
Shaping and Isotope-Purification of Ba+ Ion Coulomb Crystals — •Daniel Hönig1, Fabian Thielemann1, Pascal Weckesser1, Kai Lok Lam1, Julian Schmidt2, Leon Karpa1, and Tobias Schätz1 — 1Albert-Ludwigs Universität Freiburg — 2Laboratoire-Kastler-Brossel, Paris, Frankreich
Trapped ion Coulomb crystals are an interesting platform for quantum simulations. In order to study the dynamics of these crystals e.g. during structural phase transitions, robust methods for isotope-selective preparation as well as control over the ion number are needed.
We present two different methods for reliable ion removal: For isotope selectivity we use parametric excitation of the ions in a Paul trap. Here we achieve a mass resolution high enough to separate 137Ba+ and 138Ba+, reliably removing the unwanted isotope from the trap. The second method uses state-selective potentials within a 532nm single beam optical dipole trap. By preparing single ions of an ion Coulomb crystal in the 6S1/2 electronic ground state or the metastable 5D5/2 state, the dipole trap is attractive or repulsive, respectively. By pumping individual ions into the metastable state we can deterministically remove a single ion of choice.
On the poster we will present our experimental setup. Both theoretical simulations, as well as experimental data concerning the performance will be presented.