Feynman graphs for non-Gaussian measures

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dc.creatorDjah, S. H.
dc.creatorGottschalk, H.
dc.creatorOuerdiane, H.
dc.date2005-01-12
dc.date2006-11-30
dc.date.accessioned2026-07-07T06:38:34Z
dc.date.available2026-07-07T06:38:34Z
dc.descriptionPartition- and moment functions for a general (not necessarily Gaussian) functional measure that is perturbed by a Gibbs factor are calculated using generalized Feynman graphs. From the graphical calculus, a new notion of Wick ordering arises, that coincides with orthogonal decompositions of Wiener-Itô type only if the measure is Gaussian. Proving a generalized linked cluster theorem, we show that the logarithm of the partition function can be expanded in terms of connected Feynman graphs ("linked cluster theorem").
dc.description14 pages, 6 figures, further typos fixed, more details added on graph theoretic notions using the theory of species
dc.identifierhttps://arxiv.org/abs/math-ph/0501030
dc.identifierhttp://arxiv.org/abs/math-ph/0501030
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/100783
dc.subjectMathematical Physics
dc.subject81T18, 82B28
dc.titleFeynman graphs for non-Gaussian measures
dc.typetext

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