Feynman diagrams with the effective action

L.L. Salcedo; M.J. de la Plata

Feynman diagrams with the effective action

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arxiv hep-th/9609103 v2 pith:7CGNJS5I submitted 1996-09-12 hep-th

M.J. de la Plata , L.L. Salcedo This is my paper · ORCID

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keywords actionfeynmanapplicationscomputationderivationdiagramsdiscussedeffective

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A derivation is given of the Feynman rules to be used in the perturbative computation of the Green's functions of a generic quantum many-body theory when the action which is being perturbed is not necessarily quadratic. Some applications are discussed.

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Linearized renormalization
hep-th 2025-05 conditional novelty 6.0 of 10

For super-renormalizable scalar theories, the first-order change of the renormalized effective action under parameter variations is written with finitely many graphs built from full propagators and vertices, with no r...

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