Quantum coherence and population trapping in three-photon processes
Quantum Physics
2014-04-16 v2
Abstract
The spectroscopic properties of a single, tightly trapped atom are studied, when the electronic levels are coupled by three laser fields in an -shaped configuration of levels, whereby a -type level system is weakly coupled to a metastable state. We show that depending on the laser frequencies the response can be tuned from coherent population trapping at two-photon resonance to novel behaviour at three photon resonance, where the metastable state can get almost unit occupation in a wide range of parameters. For certain parameter regimes the system switches spontaneously between dissipative and coherent dynamics over long time scales.
Cite
@article{arxiv.quant-ph/0607218,
title = {Quantum coherence and population trapping in three-photon processes},
author = {Caroline Champenois and Giovanna Morigi and Juergen Eschner},
journal= {arXiv preprint arXiv:quant-ph/0607218},
year = {2014}
}