title: Decoherence and dissipation in a molecular system coupled to an environment: an application of semiclassical hybrid dynamics.
abstract: Applying the recently developed semiclassical hybrid dynamics [Grossmann, J. Chem. Phys. 125, 014111 (2006)], we study the decay of interference patterns in the reduced density as well as of the purity in a Morse oscillator test system due to the interaction with a finite harmonic bath at zero temperature. In the case that the bath mimics a continuous Ohmic spectral density, in addition to the quantum classical transition induced by the interaction with the environment, we corroborate the existence of a blueshift due to the bath coupling, predicted by Pollak [Phys. Rev. A 33, 4244 (1986)]. Furthermore, the decoherence dynamics of cat states is confirmed to be faster than that of single coherent states and we show that for a resonant bath the dissipation leads to an increase in the decoherence rate as compared to the low frequency bath.
authors: Institut für Theoretische Physik, Technische Universität, Dresden 01062, Dresden, Germany. cgoletz@theory.phy.tu-dresden.de
authors: Christoph-Marian
authors: CM
authors: Goletz
authors: Frank
authors: F
authors: Grossmann