30 citations · 80 across the 5 of their papers we have counts for
5 papers
Quark-Hadron Phase Transitions in Brane-World Cosmologies
Giuseppe De Risi, Tiberiu Harko, Francisco S. N. Lobo +1
When the universe was about 10 seconds old, a first order cosmological quark - hadron phase transition occurred at a critical temperature of around 200 MeV. In this work, we stu…
Non-singular Brane cosmology with a Kalb-Ramond field
G. De Risi
We present a model in which a 3-brane is embedded in a warped 5-dimensional background with a dilaton and a Kalb-Ramond 2-form. We show that it is possible to find static solutions…
Bouncing cosmology from Kalb-Ramond Braneworld
G. De Risi
We consider a 3-brane embedded in a warped 5-dimensional background with a dilaton and a Kalb-Ramond 2-form. We show that it is possible to find static solutions of the form of cha…
Graceful exit via polymerization of pre-big bang cosmology
Giuseppe De Risi, Roy Maartens, Parampreet Singh
We consider a phenomenological modification of the Pre Big Bang scenario using ideas from the resolution of curvature singularities in Loop Quantum Cosmology. We show that non-pert…
Massless and massive graviton spectra in anisotropic dilatonic braneworld cosmologies
G. De Risi
We consider a braneworld model in which an anisotropic brane is embedded in a dilatonic background. We solve the background solutions and study the behavior of the perturbations wh…