Hannover 2016 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 11: Poster: Quantum Optics and Photonics I

Q 11.42: Poster

Monday, February 29, 2016, 16:30–19:00, Empore Lichthof

The dynamical Stark effect in the Markovian dynamics of the driven Dicke model — •Daniel Pagel, Andreas Alvermann, and Holger Fehske — Institut für Physik, Ernst-Moritz-Arndt-Universität, 17487 Greifswald, Germany

The proper description of light-matter interaction in the strong coupling regime is one fundamental topic in quantum optics. Here, we study the Dicke model of driven two-level emitters strongly interacting with a single mode of a cavity beyond the rotating wave approximation. Its dissipative dynamics for weak coupling to an environment can be studied with Markovian master equations. We point out that the usually employed quantum optical master equation is invalid at strong emitter-cavity coupling and describe how exact diagonalization and the Floquet approach can be combined in a solution strategy for the master equation that is applicable also for periodically driven systems. Using this master equation we study the emission of light from the Dicke model and analyze its nonclassical properties. As an indicator of the dynamical Stark effect the peaks in the emission spectra are shifted in dependence on the external driving strength. Depending on the emitter-cavity coupling strength and the bath temperatures we find strong bunching or antibunching and characterize the statistics of the emitted radiation.