Regensburg 2004 – scientific programme
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DY: Dynamik und Statistische Physik
DY 46: Poster
DY 46.44: Poster
Thursday, March 11, 2004, 16:00–18:00, Poster D
Path integral approach to the dissipative curve-crossing dynamics — •Alexey Novikov1,2, Ulrich Kleinekathöfer1,2, and Michael Schreiber2 — 1International University Bremen, Bremen, Germany — 2Institut für Physik, Technische Universität Chemnitz, Chemnitz, Germany
The dynamics of a curve-crossing system is considered using path integrals in a combined phase space and coherent state representation. The relevant system consists of two one-dimensional potential energy surfaces, the dissipation is described by its interaction with the bath of non-interacting harmonic oscillators. The Lagrangian function of the electronic subsystem is written in the coherent state representation using mapping approach while the vibrational degrees of freedom are treated by the Feynman-Vernon path integral. The non-Gaussian part of the path integral is calculated by introducing the effective bias and hopping constants for the electronic states. Finally, the dynamics of a Gaussian wave packet and the population of electronic levels is analyzed within the presented method.