We propose a fast optically induced two-qubit \textsc{c-phase} gate between two resident spins in a pair of coupled quantum dots. An excited bound state which extends over the two dots provides an effective electron-electron exchange interaction. The gate is made possible by the electron-hole exchange interaction, which isolates a single transition in the system. When combined with appropriate single qubit rotations, this gate generates an entangled state of the two spins.
@article{arxiv.0809.2110,
title = {Optically induced spin gates in coupled quantum dots using the electron-hole exchange interaction},
author = {Sophia E. Economou and T. L. Reinecke},
journal= {arXiv preprint arXiv:0809.2110},
year = {2008}
}