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Convexity of the effective action from functional flows
We show that convexity of the effective action follows from its functional flow equation. Our analysis is based on a new, spectral representation. The results are relevant for the study of physical instabilities. We also derive constraints for convexity-preserving regulators within general truncatio...
| Autores principales: | , , |
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| Lenguaje: | eng |
| Publicado: |
2006
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| Materias: | |
| Acceso en línea: | http://cds.cern.ch/record/929763 |
| Sumario: | We show that convexity of the effective action follows from its functional flow equation. Our analysis is based on a new, spectral representation. The results are relevant for the study of physical instabilities. We also derive constraints for convexity-preserving regulators within general truncation schemes including proper-time flows, and bounds for infrared anomalous dimensions of propagators. |
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