Quantum equation of motion and two-loop cutoff renormalization for $\phi^3$ model

A. V. Ivanov; N. V. Kharuk

Quantum equation of motion and two-loop cutoff renormalization for $\phi^3$ model

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arxiv 2203.04562 v1 pith:6N3DMD65 submitted 2022-03-09 hep-th

A. V. Ivanov , N. V. Kharuk This is my paper · ORCID

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keywords renormalizationcutoffequationmodelmotionquantumtwo-loopaction

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abstract

We present two-loop renormalization of $\phi^3$-model effective action by using the background field method and cutoff momentum regularization. In this paper, we also study a derivation of the quantum equation of motion and its application to the renormalization.

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The three-loop divergent structure of the two-dimensional non-linear sigma model is computed in a coordinate-space cutoff scheme, including the new countervertices and the squared-logarithm part of the renormalization...

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