2 citations · 2 across the 1 of their papers we have counts for
3 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…
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…
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 gr…