24 citations · 36 across the 5 of their papers we have counts for
5 papers
From negative to positive cosmological constant through decreasing temperature of the Universe: connection with string theory and spacetime foliation results
E. N. Nyergesy, I. G. Márián, A. Trombettoni +1
String theories naturally predict a negative, while observations on the exponential expansion of the present Universe require a positive value for the cosmological constant. Soluti…
Thermal and Quantum Phase Transitions of the Model
István Gábor Márián, Andrea Trombettoni, István Nándori
In this paper we discuss and revisit the finite temperature extension of the renormalization group (RG) treatment of field theories, focusing as a case study on the mod…
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…
Pseudo-Periodic Natural Higgs Inflation
I. G. Marian, N. Defenu, U. D. Jentschura +2
Inflationary cosmology represents a well-studied framework to describe the expansion of space in the early universe, as it explains the origin of the large-scale structure of the c…
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…