Výsledky vyhledávání - "Denk, Stefan"

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Consistent Construction of Perturbation Theory on Noncommutative Spaces

Autor: Denk, Stefan, Putz, Volkmar, Wohlgenannt, Michael

Publikováno v: Eur.Phys.J.C45:263-272,2006

We examine the effect of non-local deformations on the applicability of interaction point time ordered perturbation theory (IPTOPT) based on the free Hamiltonian of local theories. The usual argument for the case of quantum field theory (QFT) on a no

Externí odkaz: http://arxiv.org/abs/hep-th/0402229

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Towards UV Finite Quantum Field Theories from Non-Local Field Operators

Autor: Denk, Stefan, Putz, Volkmar, Schweda, Manfred, Wohlgenannt, Michael

Publikováno v: Eur.Phys.J. C35 (2004) 283-292

A non-local toy model whose interaction consists of smeared, non-local field operators is presented. We work out the Feynman rules and propose a power counting formula for arbitrary graphs. Explicit calculations for one loop graphs show that their co

Externí odkaz: http://arxiv.org/abs/hep-th/0401237

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Time ordered perturbation theory for non-local interactions; applications to NCQFT

Autor: Denk, Stefan, Schweda, Manfred

Publikováno v: JHEP 0309:032,2003

In the past decades, time ordered perturbation theory was very successful in describing relativistic scattering processes. It was developed for local quantum field theories. However, there are field theories which are governed by non-local interactio

Externí odkaz: http://arxiv.org/abs/hep-th/0306101

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