Quantum Optics with Cavity-assisted Raman Transitions

Abstract

We demonstrate that cavity-assisted Raman transitions between hyperfine ground states are a flexible way to create effective atom-photon interactions. We use them to create an effective Tavis-Cummings model and an effective Dicke model. In both situation we have full control over all model parameters. In the Tavis-Cummings model we reach strong coupling and observe a normal mode splitting in the cavity transmission around the dispersively shifted cavity resonance. In the Dicke model we reach the regime of the phase transition and observe the onset of superradiant scattering into the cavity above critical coupling.