Renormalization group methods and the 2PI effective action
We consider a symmetric scalar theory with quartic coupling in 4 dimensions and compare the standard 2PI calculation with a modified version which uses an exact renormalization group method. The set of integral differential equations that is obtained from the exact renormalization group method trunc...
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| Hauptverfasser: | , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
6 January 2015
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Physical review. D, Particles, fields, gravitation, and cosmology
Year: 2015, Jahrgang: 91, Heft: 2, Pages: 1-17 |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.91.025003 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.91.025003 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.91.025003 
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| Verfasserangaben: | M. E. Carrington, Wei-Jie Fu, D. Pickering, and J. W. Pulver |
| Zusammenfassung: | We consider a symmetric scalar theory with quartic coupling in 4 dimensions and compare the standard 2PI calculation with a modified version which uses an exact renormalization group method. The set of integral differential equations that is obtained from the exact renormalization group method truncates naturally, without the introduction of additional approximations. The results of the two methods agree well, which shows that the exact renormalization group can be used at the level of the 2PI effective action to obtain finite results without the use of counterterms. The method therefore offers a promising starting point to study the renormalization of higher order nPI theories. |
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| Beschreibung: | Gesehen am 04.11.2020 |
| Beschreibung: | Online Resource |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.91.025003 |