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On green's functions and their applications
Author(s) -
Cederbaum L. S.
Publication year - 1990
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/qua.560382439
Subject(s) - propagator , green s , function (biology) , particle (ecology) , component (thermodynamics) , physics , green's function , statistical physics , quantum mechanics , mathematics , mathematical analysis , oceanography , evolutionary biology , biology , geology
The theory of Green's functions is briefly reviewed. It is discussed which properties of a quantum system and which physical processes can be described by Green's functions. A general approximation scheme to evaluate Green's functions and propagators is presented. Particular attention is paid to the one‐particle Green's function and to the particle–particle propagator which is a relevant component of the two‐particle Green's function. Several illustrative applications are presented and related to experiment.