In this work, we study the effects of non-Condon vibronic coupling on the quantum coherence of excitation energy transfer, via the exact dissipaton-equation-of-motion (DEOM) evaluations on excitonic model systems. Field-triggered excitation energy transfer dynamics and two dimensional coherent spectroscopy are simulated for both Condon and non-Condon vibronic couplings. Our results clearly demonstrate that the non-Condon vibronic coupling intensifies the dynamical electronic-vibrational energy transfer and enhances the total system-and-bath quantum coherence. Moreover, the hybrid bath dynamics for non-Condon effects enriches the theoretical calculation, and further sheds light on the interpretation of the experimental nonlinear spectroscopy.
@article{arxiv.1609.03685,
title = {Effects of Herzberg--Teller vibronic coupling on coherent excitation energy transfer},
author = {Hou-Dao Zhang and Qin Qiao and Rui-Xue Xu and YiJing Yan},
journal= {arXiv preprint arXiv:1609.03685},
year = {2016}
}