Editing Renormalization (section)

== Renormalization schemes ==
{{Confusing|section|date=January 2022}}
In actual calculations, the counterterms introduced to cancel the divergences in Feynman diagram calculations beyond tree level must be ''fixed'' using a set of '' renormalisation conditions''.  The common renormalization schemes in use include:
* [[Minimal subtraction scheme|Minimal subtraction (MS) scheme]] and the related modified minimal subtraction (MS-bar) scheme
* [[On shell renormalization scheme|On-shell scheme]]
Besides, there exists a "natural" definition of the renormalized coupling (combined with the photon propagator) as a propagator of dual free bosons, which does not explicitly require introducing the counterterms.<ref>{{Cite journal | last1 = Makogon | first1 = D. | last2 = Morais Smith | first2 = C. | doi = 10.1103/PhysRevB.105.174505 | title = Median-point approximation and its application for the study of fermionic systems | journal = Phys. Rev. B | volume = 105 | pages = 174505 | year = 2022| issue = 17 | arxiv = 1909.12553 | bibcode = 2022PhRvB.105q4505M | s2cid = 203591796 }}</ref>