Field-theoretic methods

dc.contributor.authorTäuber, Uwe C.en
dc.contributor.departmentPhysicsen
dc.date.accessioned2016-09-30T13:15:12Zen
dc.date.available2016-09-30T13:15:12Zen
dc.date.issued2007-07en
dc.description.abstractMany complex systems are characterized by intriguing spatio-temporal structures. Their mathematical description relies on the analysis of appropriate correlation functions. Functional integral techniques provide a unifying formalism that facilitates the computation of such correlation functions and moments, and furthermore allows a systematic development of perturbation expansions and other useful approximative schemes. It is explained how nonlinear stochastic processes may be mapped onto exponential probability distributions, whose weights are determined by continuum field theory actions. Such mappings are madeexplicit for (1) stochastic interacting particle systems whose kinetics is defined through a microscopic master equation; and (2) nonlinear Langevin stochastic differential equations which provide a mesoscopic description wherein a separation of time scales between the relevant degrees of freedom and background statistical noise is assumed. Several well-studied examples are introduced to illustrate the general methodology.en
dc.description.notesArticle for the Encyclopedia of Complexity and System Science, B. Meyers (Ed.), Springer-Verlag Berlin, 2008en
dc.identifier.doihttps://doi.org/10.1007/978-0-387-30440-3_200en
dc.identifier.urihttp://hdl.handle.net/10919/73122en
dc.relation.urihttp://arxiv.org/abs/0707.0794v1en
dc.relation.urihttp://dx.doi.org/10.1007/978-0-387-30440-3_200en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectcond-mat.stat-mechen
dc.titleField-theoretic methodsen
dc.title.serialEncyclopedia of Complexity and Systems Science, Robert A. Meyers (ed.), Springer; New York, 2009; pp. 3360-3374en
dc.typeArticleen
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Scienceen
pubs.organisational-group/Virginia Tech/Science/COS T&R Facultyen
pubs.organisational-group/Virginia Tech/Science/Physicsen
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