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Title: Probing photoisomerization processes by means of multi-dimensional electronic spectroscopy: The multi-state quantum hierarchal Fokker-Planck Equation approach
Authors: Ikeda, Tatsushi
Tanimura, Yoshitaka
Author's alias: 池田, 龍志
谷村, 吉隆
Issue Date: 7-Jul-2017
Publisher: AIP Publishing
Journal title: The Journal of Chemical Physics
Volume: 146
Issue: 1
Thesis number: 014102
Abstract: Photoisomerization in a system with multiple electronic states and anharmonic potential surfaces in a dissipative environment is investigated using a rigorous numerical method employing quantum hierarchical Fokker-Planck equations (QHFPEs) for multi-state systems. We have developed a computer code incorporating QHFPE for general-purpose computing on graphics processing units that can treat multi-state systems in phase space with any strength of diabatic coupling of electronic states under non-perturbative and non-Markovian system-bath interactions. This approach facilitates the calculation of both linear and nonlinear spectra. We computed Wigner distributions for excited, ground, and coherent states. We then investigated excited state dynamics involving transitions among these states by analyzing linear absorption and transient absorption processes and multi-dimensional electronic spectra with various values of heat bath parameters. Our results provide predictions for spectroscopic measurements of photoisomerization dynamics. The motion of excitation and ground state wavepackets and their coherence involved in the photoisomerization were observed as the profiles of positive and negative peaks of two-dimensional spectra.
Rights: The following article appeared in J. Chem. Phys. 147, 014102 (2017) and may be found at
DOI(Published Version): 10.1063/1.4989537
PubMed ID: 28688401
Appears in Collections:Journal Articles

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