Hamburg 2009 – scientific programme
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MO: Fachverband Molekülphysik
MO 22: Theorie: Moleküldynamik
MO 22.1: Talk
Thursday, March 5, 2009, 15:15–15:30, VMP 6 HS-G
Trajectory based non-Markovian dissipative quantum dynamics — •Werner Koch1, Frank Grossmann1, and David Tannor2 — 1Institut fuer Theoretische Physik, Technische Univeristaet Dresden, 01062 Dresden, Germany — 2Department of Chemical Physics, The Weizmann Institute of Science, Rehovot 76100, Israel
The availability of an exact description of the full non-Markovian influence of a heat bath on a test system without terms explicitly non-local in time allows an efficient evaluation of system dynamics exhibiting effects of decoherence and dissipation[1]. Trajectory based methods have proven to be suitable to numerically evaluate the stochastic integrals which result from the unraveling of the path integrals of the influence functional formalism[2]. We consider oscillator test systems and scattering barriers. The coupling to the environment is bilinear in the pointer variable of the system and those of an ensemble of harmonic oscillators with a fixed temperature. We present effects of the influence of the environment on the test system quantum dynamics and discuss issues arising during such calculations.
[1] Stockburger, J. T. and Grabert, H., Phys. Rev. Lett., 88(17):170 407 (2002)
[2] Koch, W. , Grossmann, F., Stockburger, J. T., and Ankerhold, J., Phys. Rev. Lett., 100(23):230402 (2008)