Long distance (1.4 micron) interaction of two different InAs/GaAs quantum dots in a photonic crystal microcavity is observed. Resonant optical excitation in the p-state of any of the quantum dots, results in an increase of the s-state emission of both quantum dots and the cavity mode. The cavity-mediated coupling can be controlled by varying the excitation intensity. These results represent an experimental step towards the realization of quantum logic operations using distant solid state qubits.
@article{arxiv.0908.1161,
title = {Microcavity-mediated Coupling of Two Distant Semiconductor Qubits},
author = {E. Gallardo and L. J. Martinez and A. K. Nowak and H. P. van der Meulen and J. M. Calleja and C. Tejedor and I. Prieto and D. Granados and A. G. Taboada and J. M. Garcia and P. A. Postigo},
journal= {arXiv preprint arXiv:0908.1161},
year = {2009}
}