A short introduction is given on the functional renormalization group method, putting
emphasis on its nonperturbative aspects. The method enables to find nontrivial fixed points …

We study 3 d O (N) symmetric scalar field theories using Polchinski's renormalization group.
In the infinite N limit the model is solved exactly including at strong coupling. At short …

The scheme dependence of the renormalization group (RG) flow has been investigated in
the local potential approximation for two-dimensional periodic, sine-Gordon type field …

Renormalization-group (RG) flow equations have been derived for the generalized sine-
Gordon model (GSGM) and the Coulomb gas (CG) in d>~ 3 of dimensions by means of the …

Approximated functional renormalization group (FRG) equations lead to regulator-
dependent beta-functions, in analogy to the scheme-dependence of the perturbative …

We aim to optimize the functional form of the compactly supported smooth (CSS) regulator
within the functional renormalization group (RG), in the framework of bosonized two …

The ground state of the multiflavor two-dimensional quantum electrodynamics is determined
in the presence of finite baryon density, and it is shown that the model possesses two …

The phase structure of the bosonized multi-flavor Schwinger model is investigated by means
of the differential renormalization group (RG) method. In the limit of small fermion mass the …

We analyze the phase structure and the renormalization group (RG) flow of the generalized
sine-Gordon models with nonvanishing mass terms, using the Wegner–Houghton RG …

The broken symmetric phase of scalar models exhibits an infrared fixed point which is
induced by the degenerate effective potential. The definition of the correlation length in the …