24 citations · 99 across the 13 of their papers we have counts for
7 papers · 1 filter
Perturbative versus Non-Perturbative Renormalization
S. Hariharakrishnan, U. D. Jentschura, I. G. Marian +2
Approximated functional renormalization group (FRG) equations lead to regulator-dependent -functions, in analogy to the scheme-dependence of the perturbative renormalization gro…
Time Evolution and Thermal Renormalization Group Flow in Cosmology
Istvan Gabor Marian, Andrea Trombettoni, Istvan Nandori
Time-evolution of the Universe as described by the Friedmann equation can be coupled to equations of motion of matter fields. Quantum effects may be incorporated to improve these c…
Renormalisation of non-differentiable potentials
J. Alexandre, N. Defenu, G. Grigolia +5
Non-differentiable potentials, such as the V-shaped (linear) potential, appear in various areas of physics. For example, the effective action for branons in the framework of the br…
Vacuum Energy and Renormalization of the Field-Independent Term
I. G. Marian, U. D. Jentschura, N. Defenu +2
Due to its construction, the nonperturbative renormalization group (RG) evolution of the constant, field-independent term (which is constant with respect to field variations but de…
Truncation Effects in the Functional Renormalization Group Study of Spontaneous Symmetry Breaking
N. Defenu, P. Mati, I. G. Marian +2
We study the occurrence of spontaneous symmetry breaking (SSB) for O(N) models using functional renormalization group techniques. We show that even the local potential approximatio…
The Numerically Optimized Regulator and the Functional Renormalization Group
I. G. Marian, U. D. Jentschura, I. Nandori
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-dimensi…
Spontaneous symmetry breaking and optimization of functional renormalization group
I. Nandori, I. G. Marian, V. Bacso
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 equatio…