Non-perturbative thermal flows and resummations
Daniel F. Litim, Jan M. Pawlowski
TL;DR
This paper develops a functional renormalisation group approach for thermal fluctuations, effectively managing infrared issues and enabling gauge-invariant analysis in gauge theories, with applications demonstrated in scalar field theories.
Contribution
It introduces a non-perturbative thermal renormalisation group framework that incorporates thermal resummations and maintains gauge invariance in gauge theories.
Findings
Infrared problems of thermal fluctuations are effectively controlled.
Thermal resummations are naturally integrated into the renormalisation group.
The approach is successfully applied to thermal scalar field theories.
Abstract
We construct a functional renormalisation group for thermal fluctuations. Thermal resummations are naturally built in, and the infrared problem of thermal fluctuations is well under control. The viability of the approach is exemplified for thermal scalar field theories. In gauge theories the present setting allows for the construction of a gauge-invariant thermal renormalisation group.
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