We demonstrate a fully-tunable multi-state Fano system in which remotely-implemented quantum states interfere with each other through their coupling to a mutual continuum. On tuning these resonances near coincidence a robust avoided crossing is observed, with a distinctive character that confirms the continuum as the source of the coupling. While the continuum often serves as a source of decoherence, our work therefore shows how its presence can instead also be essential to mediate the interaction of quantum states, a result that could allow new approaches to engineer the collective states of nanostructures.
@article{arxiv.0911.2742,
title = {Coupling Remote States through the Continuum: Multi-State Fano Resonances},
author = {Y. Yoon and M. -G. Kang and T. Morimoto and M. Kida and N. Aoki and J. L. Reno and Y. Ochiai and L. Mourokh and J. P. Bird},
journal= {arXiv preprint arXiv:0911.2742},
year = {2013}
}