Quantum Diffusion in Polaron Model of poly(dG)-poly(dC) and poly(dA)-poly(dT) DNA polymers

摘要

We numerically investigate quantum diffusion of an electron in a model ofpoly(dG)-poly(dC) and poly(dA)-poly(dT) DNA polymers with fluctuation of theparameters due to the impact of colored noise. The randomness is introduced byfluctuations of distance between two consecutive bases along the stacked basepairs. We demonstrate that in the model the decay time of the correlation cancontrol the spread of the electronic wavepacket. Furthermore it is shown thatin a motional narrowing regime the averaging over fluctuation causes ballisticpropagation of the wavepacket, and in the adiabatic regime the electronicstates are affected by localization.