Bonn 2025 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 27: Ultra-cold Plasmas and Rydberg Systems I (joint session A/Q)
A 27.2: Vortrag
Donnerstag, 13. März 2025, 11:30–11:45, HS PC
Impact of micromotion on the excitation of Rydberg states of ions in a Paul trap — Wilson Santana Martins1, •Joseph William Peter Wilkinson1, Markus Hennrich2, and Igor Lesanovsky1,3 — 1Institut für Theoretische Physik, Universität Tübingen, Auf der Morgenstelle 14, 72076 Tübingen, Germany — 2Department of Physics, Stockholm University, SE-106 91 Stockholm, Sweden — 3School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
Trapped ions are among the most advanced platforms for quantum simulation and computation. Their capabilities can be further enhanced by making use of electronically highly excited Rydberg states. So far, most experimental and theoretical studies focus on the Rydberg excitation of ions in Paul traps. These generate confinement by a combination of static and oscillating electric fields, which need to be carefully aligned to minimize micromotion. In this talk, we briefly discuss the results in Ref. [1], which aim to understand the impact of micromotion on the Rydberg excitation spectrum when the symmetry axes of the electric fields do not coincide. This is important in the case of field misalignment and is inevitable for Rydberg excitations in 2D and 3D ion crystals. We developed a model describing a trapped Rydberg ion, which we solved using Floquet and perturbation theory. We calculated the excitation spectra and analyzed in which parameter regimes energetically isolated Rydberg lines persist, which are an important requirement for conducting coherent manipulations.
[1] W. S. Martins et al., arXiv:2410.24047 (2024)
Keywords: Rydberg physics; Trapped ions; Micromotion; Spin-phonon coupling; Quantum Rabi model