In this chapter, we shall see how it is possible to obtain a perturbation expansion of the Green functions that allows us to evaluate them, in principle, at times far from the noninteracting initial state. This perturbation expansion may be formulated in terms Feynman diagrams.
CITATION STYLE
Jacoboni, C. (2010). Perturbation Expansion of Green Functions: Feynman Diagrams and Dyson Equation. In Springer Series in Solid-State Sciences (Vol. 165, pp. 477–496). Springer Science and Business Media Deutschland GmbH. https://doi.org/10.1007/978-3-642-10586-9_26
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