35 citations · 279 across the 30 of their papers we have counts for
30 papers
Viable Cosmological Solutions from Hybrid Potentials
Koralia Tzanni, John Miritzis
We study flat Friedmann-Lema\^ıtre-Robertson-Walker (FLRW) models with a perfect fluid matter source and a scalar field minimally coupled to matter with power-law-exponential \text…
Legendre scalarization in gravity and cosmology
Spiros Cotsakis, Jose P. Mimoso, John Miritzis
We propose a new formulation of gravity, dubbed scalarized gravity, in which the Legendre transform is included as a dynamical term. This leads to a theory with secon…
The cosmological frame principle and cosmic acceleration
Spiros Cotsakis, Jose P. Mimoso, John Miritzis
We discuss implications of the cosmological frame principle which states that cosmological effects of modified gravity must be stable as solutions of each of the corresponding sets…
Trans-Planckian censorship and spacetime singularities
Spiros Cotsakis, John Miritzis
We study the effects of trans-planckian censorship conjecture (TCC) bounds on geodesic completeness of spacetime and the associated existence for an infinite proper time. Using Gro…
Localizing branes with bifurcating bulks
Ignatios Antoniadis, Spiros Cotsakis, John Miritzis
We study the problem of evolution of bulk 5-fluids having an embedded braneworld with a flat, de Sitter, or anti-de Sitter geometry. We introduce new variables to express the Einst…
The conformal cosmological potential
Spiros Cotsakis, Ifigeneia Klaoudatou, Georgios Kolionis +2
We discuss qualitative features of the conformal relation between certain classes of gravity theories and general relativity, common to different themes such as , Brans-Dicke…