Spectral functions from the functional renormalization group

20 May 2014, 15:40
20m
helium (darmstadtium)

helium

darmstadtium

Schlossgraben 1 64283 Darmstadt Germany
Contributed Talk QCD Phase Diagram QCD phase diagram

Speaker

Ralf-Arno Tripolt (TU Darmstadt)

Description

We present a new method to obtain real-time quantities such as spectral functions and transport coefficients at finite temperature and density using a non-perturbative Functional Renormalization Group approach [1]. 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. We demonstrate the feasibility of our method by calculating the mesonic spectral functions in the quark-meson model at different temperatures and values of the quark chemical potential, in particular near the critical endpoint of the corresponding phase diagram. [1] Tripolt, Strodthoff, von Smekal, Wambach, Phys. Rev. D 89, 034010 (2014)
On behalf of collaboration: None

Primary author

Ralf-Arno Tripolt (TU Darmstadt)

Co-authors

Prof. Jochen Wambach (TU Darmstadt and GSI) Prof. Lorenz von Smekal (Justus-Liebig-Universität Giessen and TU Darmstadt) Dr Nils Strodthoff (Ruprecht-Karls-Universität Heidelberg)

Presentation Materials