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Finite-Temperature Spectral Functions from the Functional Renormalization Group

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arxiv 1311.4304 v1 pith:L4XGNCRK submitted 2013-11-18 hep-lat hep-phhep-th

Finite-Temperature Spectral Functions from the Functional Renormalization Group

Ralf-Arno Tripolt , Nils Strodthoff , Lorenz von Smekal , Jochen Wambach This is my paper
classification hep-lat hep-phhep-th
keywords functionsspectralfinitefunctionalgroupmethodrenormalizationtemperature
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We present a method to obtain spectral functions at finite temperature from the Functional Renormalization Group. Our method is based on a thermodynamically consistent truncation of the flow equations for 2-point functions with analytically continued frequency components in the originally Euclidean external momenta. For the uniqueness of this continuation at finite temperature we furthermore implement the physical Baym-Mermin boundary conditions. Results are presented for mesonic spectral functions obtained from a two-flavor quark-meson model.

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