Coherent nuclear motion in a condensed-phase environment: Wave-packet approach and pump-probe spectroscopy
Abstract
A quantum-mechanical Gaussian wave-packet approach to the theoretical description of nuclear motions in a condensed-phase environment is developed. General expressions for the time-dependent reduced density matrix are given for a harmonic potential surface, and the exact quantum dynamics is found for a microscopic system-plus-bath model. Particular attention is devoted to the influence of initial correlations between system and bath for the outcome of a pump-probe experiment. We show that the standard factorized preparation, compared to a more realistic correlated preparation, leads to significantly different stimulated emission spectra at high temperatures. Recent experiments for the reaction center are analyzed using this formalism.
Keywords
Cite
@article{arxiv.physics/9901015,
title = {Coherent nuclear motion in a condensed-phase environment: Wave-packet approach and pump-probe spectroscopy},
author = {L. Muhlbacher and A. Lucke and R. Egger},
journal= {arXiv preprint arXiv:physics/9901015},
year = {2009}
}
Comments
12 page, 13 figures