SAMOP 2023 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 27: Poster III

A 27.7: Poster

Donnerstag, 9. März 2023, 16:30–19:00, Empore Lichthof

A 1d-optical lattice for a crystal of cold ions — •Amir Mohammadi¹, Daniel Hoenig¹, Leon Karpa², and Tobias Schaetz¹ — ¹Albert-Ludwigs Universität, Freiburg, Germany — ²Leibniz Universität, Hannover, Germany

Crystals of ions are a promising tool for implementing quantum simulation e.g., spin interaction in a solid. For decades rf-traps and Penning traps have confined Coulomb crystals using a ponderomotive force acting on charged particles. Despite stability and reasonable control over charged particles in these traps, they are driven into inherent energetic motion known as excess micromotion that heats up the ions and limits the applications of the system. As an alternative, it has been shown [1] that a chain of ions can also be trapped in a single optical beam that is spatially focused, similar to neutral atoms in an optical dipole trap, and can be seen as a platform for realizing a quantum simulation without any micromotion. As a next step in confining and localizing cold ions with light fields, we introduce the first successful trapping of a 138Ba ion Columb crystal up to three ions in a 1d-optical lattice featured by two counter-propagating 532nm laser beams of parallel polarization. We observe orders of magnitude enhancement in the axial trapping frequencies revealing single-site confinement for each individual trapped ion.

[1] Schmidt, J., et al., Phys. Rev. X 8, 021028 (2018)