Green functions and nonlinear systems: Short time expansion

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dc.creatorFrasca, Marco
dc.date2007-04-12
dc.date2007-10-02
dc.date.accessioned2026-07-07T11:56:33Z
dc.date.available2026-07-07T11:56:33Z
dc.descriptionWe show that Green function methods can be straightforwardly applied to nonlinear equations appearing as the leading order of a short time expansion. Higher order corrections can be then computed giving a satisfactory agreement with numerical results. The relevance of these results relies on the possibility of fully exploiting a gradient expansion in both classical and quantum field theory granting the existence of a strong coupling expansion. Having a Green function in this regime in quantum field theory amounts to obtain the corresponding spectrum of the theory.
dc.description7 pages, 3 figures. Version accepted for publication in International Journal of Modern Physics A
dc.identifierhttps://arxiv.org/abs/0704.1568
dc.identifierhttp://arxiv.org/abs/0704.1568
dc.identifierInt.J.Mod.Phys.A23:299-308,2008
dc.identifierdoi:10.1142/S0217751X08038160
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/205577
dc.subjectHigh Energy Physics - Theory
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectMathematical Physics
dc.titleGreen functions and nonlinear systems: Short time expansion
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