Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/9424
Title: Perturbation theory for classical thermodynamic Green's functions
Author: Enz, Charles P. (Charles Paul), 1925-
Garrido Beltrán, Lluís
Keywords: Pertorbació (Dinàmica quàntica)
Funcions de Green
Perturbation (Quantum dynamics)
Green's functions
Issue Date: 1976
Publisher: The American Physical Society
Abstract: A systematic time-dependent perturbation scheme for classical canonical systems is developed based on a Wick's theorem for thermal averages of time-ordered products. The occurrence of the derivatives with respect to the canonical variables noted by Martin, Siggia, and Rose implies that two types of Green's functions have to be considered, the propagator and the response function. The diagrams resulting from Wick's theorem are "double graphs" analogous to those introduced by Dyson and also by Kawasaki, in which the response-function lines form a "tree structure" completed by propagator lines. The implication of a fluctuation-dissipation theorem on the self-energies is analyzed and compared with recent results by Deker and Haake.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i http.//dx.doi.org/10.1103/PhysRevA.14.1258
It is part of: Physical Review A, 1976, vol. 14, núm. 3, p. 1258-1268.
URI: http://hdl.handle.net/2445/9424
ISSN: 1050-2947
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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