R. Seoane Souto, A. Levy Yeyati, A. Martín-Rodero, R. C. Monreal
In this work, a new theoretical approach to study the non-equilibrium transport properties of nanoscale systems coupled to metallic electrodes with strong electron-phonon interactions is presented. The proposed approach consists in a resummation of the dominant Feynman diagrams from the exact preturbative expansion. This scheme is compared with methods that can be found in the literature. It shows a good agreement with these methods in the range where they are known to provide good results, for a wide range of parameters. Also, it is compared with path-integral Monte Carlo calculations giving a relatively good agreement for polaronic and non polaronic regimes. Some preliminary results for the current noise obtained with our method are presented.
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http://arxiv.org/abs/1307.8008
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