Convexity of the effective action from functional flows

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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.
4 pages, 3 figures

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High Energy Physics - Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/108761

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/hep-th/0602140
 http://arxiv.org/abs/hep-th/0602140

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arXiv