Quantum non-equilibrium approach for fast electron transport in open   systems: photosynthetic reaction centers
  Creation of electron or exciton by external fields in a system with initially statistically independent unrelaxed vibrational modes leads to an initial condition term. The contribution of this term in the time convolution generalized master equation approach is studied in second order of the perturbation theory in the path integral formalism. The developed approach, applied for analysis of dynamics in the photosynthetic reaction center, exhibits the key role of the initial condition terms at the primary stage of electron transfer. 
M. Pudlak, K. N. Pichugin, R. G. Nazmitdinov, R. Pincak
physics.bio-ph cond-mat.soft nucl-th physics.chem-ph