Regensburg 2010 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 6: Poster Session I

DY 6.49: Poster

Montag, 22. März 2010, 16:00–18:00, Poster B2

Quantum Monte Carlo simulations for the dynamics of the spin-boson model with a structured environment — •Charlotte Escher and Joachim Ankerhold — Institut für Theoretische Physik, Universität Ulm, 89069 Ulm

Based on a numerically exact path integral Monte Carlo approach we investigate the real-time dynamics of the dissipative quantum mechanical two-state system. The dissipation in our case is due to the interaction with an environment whose spectral density is not purely Ohmic, but instead shows additional resonances at characteristic frequencies. Models with this kind of structured environment are of relevance for qubit devices in condensed matter systems and quantum optics (dissipative Jaynes-Cummings model).