Baden, Markus

Date: Tuesday August 26, 2014
Time: 11:00
Place: ETH Zurich, Hönggerberg, HPF G 6
Host: Tobias Donner / Tilman Esslinger

Tailoring atom-photon interactions using cavity-assisted Raman transitions

Markus Baden
Centre for Quantum Technologies, Singapore

Two-photon transitions between hyperfine groundstates that involve the strong coupling to a high-finesse cavity are a flexible way to create effective atom-light interactions. We use one cavity-assisted Raman transition to create a situation described the Tavis-Cummings model. We reach strong coupling in the effective model and observe a normal mode splitting in the cavity transmission around the dispersively shifted cavity. Adding a second cavity-assisted Raman transition the situation is described by the Dicke model. We observe the onset of superradiant scattering into the cavity above critical coupling. We also demonstrate control over all model parameters.  Both experiments highlight the flexibility provided by cavity-assisted Raman transitions for simulating quantum-optical models.