The coherent coupling of flying photonic qubits to stationary matter-based qubits is an essential building block for quantum communication networks. We show how such a quantum interface can be realized between a traveling-wave optical field and the polarized nuclear spins in a singly charged quantum dot strongly coupled to a high-finesse optical cavity. By adiabatically eliminating the electron a direct effective coupling is achieved. Depending on the laser field applied, interactions that enable either write-in or read-out are obtained.
@article{arxiv.0810.4488,
title = {A quantum interface between light and nuclear spins in quantum dots},
author = {Heike Schwager and J. Ignacio Cirac and Géza Giedke},
journal= {arXiv preprint arXiv:0810.4488},
year = {2013}
}