Abstract
There are two basic approaches to the approximate calculation of Green’s functions. One is based upon the differential equation obeyed by g. In the other a perturbation expansion is employed where g is expressed as a series, the terms of which involve the unperturbed go and the interaction potential v(r − r’).
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© 1983 Springer-Verlag Berlin Heidelberg
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Economou, E.N. (1983). Calculational Methods for g. In: Green’s Functions in Quantum Physics. Springer Series in Solid-State Sciences, vol 7. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-02369-3_10
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DOI: https://doi.org/10.1007/978-3-662-02369-3_10
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-12266-1
Online ISBN: 978-3-662-02369-3
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