We propose a simple stochastic model which successfully explains the long coherence effects observed in photosynthetic Excitation Energy Transport (EET) by 2D photon echo experiments of G. S. Engel et. al. (Nature, {\bf 446} 782, (2007)). Our Two-Component Phonon Spectrum (TCPS) model is based upon the division of phonon degrees of freedom into a systematic component which is treated through polaron transformation and a stochastic component which is treated through dynamical disorder. This model successfully explains the observed long coherence upto ∼600fsec in EET experiments.
@article{arxiv.1106.5854,
title = {Explaining the observed long coherence effects by 2D photon echo experiments in photosynthetic EET : Two-Component Phonon Spectrum model},
author = {Navinder Singh and V. M. Kenkre and R. E. Amritkar},
journal= {arXiv preprint arXiv:1106.5854},
year = {2011}
}
Comments
5 pages and 14 figures; This paper has been withdrawn by the authors