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 the full phase diagram of a non-Hermitian PT-symmetric generalization of the
paradigmatic two-dimensional massive Thirring model. Employing the nonperturbative …

We present the first self-consistent direct calculation of a spectral function in the framework
of the functional renormalization group. The study is carried out in the relativistic O (N) …

The requirement for the absence of spontaneous symmetry breaking in the d= 1 dimension
has been used to optimize the regulator dependence of functional renormalization group …

A bstract The functional renormalization group equation with a compactly supported smooth
(CSS) regulator function is considered. It is demonstrated that in an appropriate limit the …

A bstract We performed the renormalization group analysis of the quantum Einstein gravity
in the deep infrared regime for different types of extensions of the model. It is shown that an …

A bstract We study the occurrence of spontaneous symmetry breaking (SSB) for O (N)
models using functional renormalization group techniques. We show that even the local …

In this paper we will discuss the derivation of the so-called vanishing beta function curves
which can be used to explore the fixed point structure of the theory under consideration. This …

In this paper we study the c-function of the sine-Gordon model taking explicitly into account
the periodicity of the interaction potential. The integration of the c-function along trajectories …

The quantum Einstein gravity is treated by the functional renormalization group method
using the Einstein-Hilbert action. The ultraviolet non-Gaussian fixed point is determined and …