We describe an opto-electronic structure in which charge and spin degrees of freedom in electrical gate-defined quantum dots can be coherently coupled to light. This is achieved via electron-electron interaction or via electron tunneling into a proximal self-assembled quantum dot. We illustrate potential applications of this approach by considering several quantum control techniques, including optical read-out of gate-controlled semiconductor quantum bits and controlled generation of entangled photon-spin pairs.
@article{arxiv.cond-mat/0612700,
title = {Quantum optical interface for gate-controlled spintronic devices},
author = {Hans-Andreas Engel and Jacob M. Taylor and Mikhail D. Lukin and Atac Imamoglu},
journal= {arXiv preprint arXiv:cond-mat/0612700},
year = {2007}
}