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Title: Finite-temperature T matrix in a real-time formalism
Author: Canivell Cretchley, Víctor
Garrido Beltrán, Lluís
San Miguel Ruibal, Maximino
Seglar, P. (Pedro)
Keywords: Teoria quàntica
Quantum kinetics
Issue Date: 1978
Publisher: The American Physical Society
Abstract: A generalized off-shell unitarity relation for the two-body scattering T matrix in a many-body medium at finite temperature is derived, through a consistent real-time perturbation expansion by means of Feynman diagrams. We comment on perturbation schemes at finite temperature in connection with an erroneous formulation of the Dyson equation in a paper recently published.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review A, 1978, vol. 17, núm. 1, p. 480-485.
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ISSN: 1050-2947
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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