Berlin 2005 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 8: Posters Transport

TT 8.38: Poster

Freitag, 4. März 2005, 14:00–18:00, Poster TU C

Driven two-level system in a photonic crystal — •Geesche Boedecker and Carsten Henkel — Institut für Physik, Universität Potsdam, Am Neuen Palais 10, 14469 Potsdam

We discuss a specific system-reservoir model with strong coupling and long-range temporal memory in the bath. The model can be physically realized with a coherently driven two-level system embedded in a photonic crystal. The problem differs from the usual spin-boson setting in several respects: the bath is essentially at zero temperature, its spectral density is zero in some finite frequency interval (photonic bandgap), and the two-level system is only coupled to near-resonant bath modes (rotating wave approximation). Its emission spectrum has been characterized only in the weak coupling limit in the quantum optics literature. We discuss here numerically exact simulation schemes for this non-Markovian problem and compare them to approximations based on the path integral formulation.