Fast thermometry for trapped ions using dark resonances
Abstract
We experimentally demonstrate a method to determine the temperature of trapped ions which is suitable for monitoring fast thermalization processes. We show that observing and analyzing the lineshape of dark resonances in the fluorescence spectrum provides a temperature measurement which accurate over a large dynamic range, applied to single ions and small ion crystals. Laser induced fluorescence is detected over a time of only s allowing for rapid determination of the ion temperature. In the measurement range of mK we reach better than accuracy. Tuning the cooling laser to selected resonance features allows for controlling the ion temperatures between mK and more than mK. Experimental work is supported by a solution of the 8-level optical Bloch equations when including the ions classical motion. This technique paves the way for many experiments comprising heat transport in ion strings, heat engines, non-equilibrium thermodynamics or thermometry of large ion crystals.
Cite
@article{arxiv.1412.5014,
title = {Fast thermometry for trapped ions using dark resonances},
author = {Johannes Roßnagel and Karl Nicolas Tolazzi and Ferdinand Schmidt-Kaler and Kilian Singer},
journal= {arXiv preprint arXiv:1412.5014},
year = {2015}
}