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

Abstract

We numerically investigate quantum diffusion of an electron in a model of poly(dG)-poly(dC) and poly(dA)-poly(dT) DNA polymers with fluctuation of the parameters due to the impact of colored noise. The randomness is introduced by fluctuations of distance between two consecutive bases along the stacked base pairs. We demonstrate that in the model the decay time of the correlation can control the spread of the electronic wavepacket. Furthermore it is shown that in a motional narrowing regime the averaging over fluctuation causes ballistic propagation of the wavepacket, and in the adiabatic regime the electronic states are affected by localization.

17pages, 8figures

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Cited by in corpus (4)

• Charge transport through bio-molecular wires in a solvent: Bridging molecular dynamics and model Hamiltonian approaches
• Nonequilibrium dynamics of the Holstein polaron driven by external electric field
• Structural fluctuations and quantum transport through DNA molecular wires: a combined molecular dynamics and model Hamiltonian approach
• Ab initio study of electron transport in dry poly(G)-poly(C) A-DNA strands