5 papers
Analysis of regulator and cutoff artifacts in the phase diagram of the quark-meson model
Jonas Stoll, Niklas Zorbach, Lutz Kiefer +3
We study regulator and cutoff artifacts in the quark-meson model at finite temperature and quark chemical potential within the functional renormalization-group approach using the l…
Nonperturbative fluctuation effects of charged bosonic fields: A quark-diquark model study at nonzero density
Jonas Stoll, Niklas Zorbach, Jens Braun
We study the renormalization group flow of the scale-dependent effective potential of a quark-diquark model with full field dependence at nonzero chemical potential. This includes…
Lattice Monte Carlo meets lattice functional Renormalization Group: A quantitative comparison
Niklas Zorbach, Jan Philipp Klinger, Owe Philipsen +1
Lattice Monte Carlo (MC) simulations and the functional Renormalization Group (RG) are powerful approaches that allow for quantitative studies of non-perturbative phenomena such as…
Functional Renormalization Group meets Computational Fluid Dynamics: RG flows in a multi-dimensional field space
Niklas Zorbach, Adrian Koenigstein, Jens Braun
Within the Functional Renormalisation Group (FRG) approach, we present a fluid-dynamical approach to solving flow equations for models living in a multi-dimensional field space. To…
Optimization and Stabilization of Functional Renormalization Group Flows
Niklas Zorbach, Jonas Stoll, Jens Braun
We revisit optimization of functional renormalization group flows by analyzing regularized loop integrals. This leads us to a principle, the Principle of Strongest Singularity, and…