Nonlinear quantum optics mediated by Rydberg interactions
Nonlinear quantum optics mediated by Rydberg interactions
By mapping the strong interaction between Rydberg excitations in ultra-cold atomic ensembles onto single photons via electromagnetically induced transparency, it is now possible to realize a medium which exhibits a strong optical nonlinearity at the level of individual photons. We review the theoretical concepts and the experimental state-of-the-art of this …