Leonard Fister

Landau gauge Yang-Mills correlation functions

We investigate Landau gauge

Gluon spectral functions and transport coefficients in Yang-Mills theory

SU(3)

From Quarks and Gluons to Hadrons: Chiral Symmetry Breaking in Dynamical QCD

Yang-Mills theory in a systematic vertex expansion scheme for the effective action with the functional renormalisation group. Particular focus is put on the dynamical creation of the gluon mass gap at non-perturbative momenta and the consistent treatment of quadratic divergences. The non-perturbative ghost and transverse gluon propagators as well as the momentum-dependent ghost-gluon, three-gluon and four-gluon vertices are calculated self-consistently with the classical action as only input. The apparent convergence of the expansion scheme is discussed and within the errors, our numerical results are in quantitative agreement with available lattice results.

On the Infrared Behaviour of Landau Gauge Yang‐Mills Theory with Differently Charged Scalar Fields

We compute non-perturbative gluon spectral functions at finite temperature in quenched QCD with the maximum entropy method. We also provide a closed loop equation for the spectral function of the energy-momentum tensor in terms of the gluon spectral function. This setup is then used for computing the shear viscosity over entropy ratio

Exploratory study of the temperature dependence of magnetic vertices in SU(2) Landau gauge Yang--Mills theory

\eta/s

Critical Point and Deconfinement from Dyson-Schwinger Equations

in a temperature range from about

Yang-Mills correlation functions at finite temperature

0.4\, T_c

Functional renormalization group in a finite volume

to

Quark Confinement from Correlation Functions

4.5\, T_c

Confinement from Correlation Functions

. The ratio