期刊
EUROPHYSICS LETTERS
卷 73, 期 6, 页码 913-919出版社
EDP SCIENCES S A
DOI: 10.1209/epl/i2005-10479-1
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We investigate electron transfer processes in donor-acceptor systems with a coupling of the electronic degrees of freedom to a common bosonic bath. The model allows to study many-particle effects and the influence of the local Coulomb interaction U between electrons on donor and acceptor sites. Using the non-perturbative numerical renormalization group approach we find distinct differences between the electron transfer characteristics in the single-and two-particle subspaces. We calculate the critical electron-boson coupling alpha(c) as a function of U and show results for density-density correlation functions in the whole parameter space. The possibility of many-particle (bipolaronic) and Coulomb-assisted transfer is discussed.
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