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Bosonic Loop Diagrams as Perturbative Solutions of the Classical Field Equations in ϕ4-Theory

URN to cite this document:
urn:nbn:de:bvb:355-epub-264970
Finster, Felix ; Tolksdorf, Jürgen
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Date of publication of this fulltext: 23 Oct 2012 06:33



Abstract

Solutions of the classical ϕ4-theory in Minkowski space-time are analyzed in a perturbation expansion in the nonlinearity. Using the language of Feynman diagrams, the solution of the Cauchy problem is expressed in terms of tree diagrams which involve the retarded Green's function and have one outgoing leg. In order to obtain general tree diagrams, we set up a “classical measurement process” in ...

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