The low temperature spin dynamics of a Fe8 Single-Molecule Magnet was studied under circularly polarized electromagnetic radiation allowing us to establish clearly photon-assisted tunneling. This effect, while linear at low power, becomes highly non-linear above a relatively low power threshold. This non-linearity is attributed to the nature of the coupling of the sample to the thermostat.These results are of great importance if such systems are to be used as quantum computers.
@article{arxiv.cond-mat/0304274,
title = {Photon-assisted tunneling in a Fe8 Single-Molecule Magnet},
author = {L. Sorace and W. Wernsdorfer and C. Thirion and A. -L. Barra and M. Pacchioni and D. Mailly and B. Barbara},
journal= {arXiv preprint arXiv:cond-mat/0304274},
year = {2009}
}