We discuss a model of quantum photosynthesis with degeneracy in the light-harvesting system. We consider interaction of excitons in chromophores with light and phonons (vibrations of environment). These interactions have dipole form but are different (are related to non-parallel vectors of "bright" states). We show that this leads to excitation of non-decaying "dark" states. We discuss relation of this model to the known from spectroscopical experiments phenomenon of existence of photonic echo in quantum photosynthesis.
@article{arxiv.1603.07182,
title = {Dark states in quantum photosynthesis},
author = {S. V. Kozyrev and I. V. Volovich},
journal= {arXiv preprint arXiv:1603.07182},
year = {2016}
}