SAMOP 2023 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 23: Ultra-cold Atoms, Ions and BEC IV (joint session A/Q)
A 23.1: Hauptvortrag
Donnerstag, 9. März 2023, 11:00–11:30, F303
Trapping Ions and Ion Coulomb Crystals in a 1D Optical Lattice — •Daniel Hoenig1, Fabian Thielemann1, Joachim Welz1, Wei Wu1, Thomas Walker1, Leon Karpa2, Amir Mohammadi1, and Tobias Schaetz1 — 1Albert-Ludwigs Universität, Freiburg, Germany — 2Leibniz Universität, Hannover, Germany
The long-range Coulomb interaction between ions and the dependence of the trapping potential on the internal electronic state of the ions make optically trapped ion Coulomb crystals an interesting platform for quantum simulations. Optical lattices further extend this platform by providing arrays of individual microtraps for the ions.
In the past, we reported the successful trapping of a single ion in a one-dimensional optical lattice as well as of ion Coulomb crystals in a single-beam optical dipole trap. In this talk, we present recent advancements in trapping 138Ba+ ions in a one-dimensional optical lattice at a wavelength of 532nm and the first successful trapping of linear ion Coulomb crystals (N ≤ 3) in such a trap array. The observed eigenfrequencies of the ions in the lattice and the increased robustness against axial electric fields provide evidence for the single-site confinement of the ions at individual lattice sites.
As optical lattices are extendable in size and dimension, they might allow for the realization of ion-microtrap structures in 2D and 3D. Additionally, the absence of micromotion in optical traps could give them an edge over rf-traps in applications, where heating and decoherence induced by micromotion become limiting factors, as for example, the study of atom-ion interactions at ultracold temperatures.