Dynamical pictures and causality in finite temperature Green's functions |
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Authors: | L. Garrido M. San Miguel |
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Affiliation: | Departamento de Física Teórica, Universidad de Barcelona, Barcelona, Spain |
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Abstract: | Real-time finite temperature Green's functions are discussed on the basis of the definition of new dynamical pictures. Causality appears explicitly. Feynman diagrams are formally identical to the ones of zero temperature. The vanishing of disconnected diagrams follows naturally. |
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