Abstract
In this book section, we give a brief introduction to many-body perturbation theory for coupled fermion-boson systems using non-equilibrium Green’s functions . Using the language of modern many-body perturbation theory and the so-called contour-ordered correlators, a single consistent formalism arises which can be applied to a multitude of classes of systems.
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Acknowledgments
Several of the derivations in this work were based on the PhD thesis of Niko Säkkinen. D.K. acknowledges the Academy of Finland for funding under Project No. 308697.
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Karlsson, D., van Leeuwen, R. (2020). Non-equilibrium Green’s Functions for Coupled Fermion-Boson Systems. In: Andreoni, W., Yip, S. (eds) Handbook of Materials Modeling. Springer, Cham. https://doi.org/10.1007/978-3-319-44677-6_8
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