Experimental and theoretical investigation of a multi-mode cooling scheme using multiple EIT resonances
Abstract
We introduce and demonstrate double-bright electromagnetically induced transparency (D-EIT) cooling as a novel approach to EIT cooling. By involving an additional ground state, two bright states can be shifted individually into resonance for cooling of motional modes of frequencies that may be separated by more than the width of a single EIT cooling resonance. This allows three-dimensional ground state cooling of a Ca ion trapped in a linear Paul trap with a single cooling pulse. Measured cooling rates and steady-state mean motional quantum numbers for this D-EIT cooling are compared with those of standard EIT cooling as well as concatenated standard EIT cooling pulses for multi-mode cooling. Experimental results are compared to full density matrix calculations. We observe a failure of the theoretical description within the Lamb-Dicke regime that can be overcome by a time-dependent rate theory. Limitations of the different cooling techniques and possible extensions to multi-ion crystals are discussed.
Keywords
Cite
@article{arxiv.1711.00732,
title = {Experimental and theoretical investigation of a multi-mode cooling scheme using multiple EIT resonances},
author = {Nils Scharnhorst and Javier Cerrillo and Johannes Kramer and Ian D. Leroux and Jannes B. Wübbena and Alex Retzker and Piet O. Schmidt},
journal= {arXiv preprint arXiv:1711.00732},
year = {2018}
}
Comments
18 pages, 13 figures. We have decided to merge the contents of our submission arXiv:1711.00738 with this paper into one comprehensive work. New title