Incoherent repumping scheme in the $^{88}$Sr$^{+}$ five-level manifold
Abstract
Laser-cooled trapped ions are at the heart of modern quantum technologies and their cooling dynamics often deviate from the simplified two-level atom model. Doppler cooling of the Sr ion involves several electronic levels and repumping channels that strongly influence fluorescence. In this work, we study a repumping scheme for the Sr ion by combining precision single-ion spectroscopy with comprehensive numerical modeling based on optical Bloch equations including 18 Zeeman sublevels. We show that, although the observed fluorescence spectra retain a Lorentzian lineshape, their width and amplitude cannot be explained by a two-level atom description. Moreover, we find the optimal repumping conditions for maximizing the photon scattering rate.
Keywords
Cite
@article{arxiv.2512.08710,
title = {Incoherent repumping scheme in the $^{88}$Sr$^{+}$ five-level manifold},
author = {Valentin Martimort and Sacha Guesne and Derwell Drapier and Vincent Tugaye and Lilay Gros-Desormeaux and Valentin Cambier and Albane Douillet and Luca Guidoni and Jean-Pierre Likforman},
journal= {arXiv preprint arXiv:2512.08710},
year = {2025}
}
Comments
11 pages, 12 figures