On the effective action of local composite fields
S.A.Garnov
TL;DR
This paper proposes a gauge invariant method for calculating the effective action of local composite fields in quantum field theory, demonstrating its application in QED up to two loops and deriving relevant graph rules.
Contribution
It introduces a gauge invariant approach for effective actions of local composite fields and derives graph rules, advancing calculations in quantum field theory.
Findings
Effective action in QED computed up to 2-loop level.
Derived graph rules for local composite fields.
Discussed one-particle irreducibility issues.
Abstract
The gauge invariant method for calculation of the effective action of the local composite fields in QFT is proposed. The effective action of the local composite fields in QED is studied up to 2-loop level. The graph rules for the local composite fields are derived. On the basis of these rules the problem of one-particle irreducibility is discussed.
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Taxonomy
TopicsAdvanced Theoretical and Applied Studies in Material Sciences and Geometry · Algebraic and Geometric Analysis · Advanced Numerical Analysis Techniques