Towards hybrid quantum information in weak-coupling solid-state cavity QED systems*

Quantum dots in oxide-apertured micropillar cavities are robust high-Q structures to implement solid-state cavity quantum electrodynamics (QED) and quantum information schemes involving single photons and the spin of a single confined electron. The electron spin interacts with the optical field through the trion state (two electrons-one hole). We discuss spin-selective photon reflection in the weak coupling cavity-QED regime and hybrid photon-electron spin schemes for implementing quantum gates. We discuss the practical implementation of the proposed schemes. In particular we show experimentally that the oxide-apertured micropillar cavities exhibit high-quality Hermite-Gaussian modes and that such modes can be permanently tuned, up to 150GHz, by introducing strain via optically induced surface deformations.