415 citations
- National Technical University of AthensGR169 papers
- National and Kapodistrian University of AthensGR159 papers
- European Organization for Nuclear ResearchCH158 papers
- Argonne National LaboratoryUS157 papers
- Columbia UniversityUS157 papers
- McGill UniversityCA157 papers
- Rutherford Appleton LaboratoryGB157 papers
- Tel Aviv UniversityIL157 papers
- The Ohio State UniversityUS157 papers
- The University of TokyoJP157 papers
- Universidad Autónoma de MadridES157 papers
- University College LondonGB157 papers
25 papers · 1 filter
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…
Sudden Shock Waves in modified gravity
Ignatios Antoniadis, Spiros Cotsakis, Dimitrios Trachilis
We construct a generic asymptotic solution for modified gravity near a sudden singularity. This solution contains a fluid source with no equation of state and is function-counting…
Dispersive Friedmann universes and synchronization
Spiros Cotsakis
We introduce consideration of dispersive aspects of standard perfect fluid Friedmann cosmology and study the new qualitative behaviours of cosmological solutions that emerge as the…
IR quantum gravity solves naturally cosmic acceleration and its coincidence problem
Fotios K. Anagnostopoulos, Georgios Kofinas, Vasilios Zarikas
The novel idea is that the undergoing accelerated expansion of the universe happens due to infrared quantum gravity modifications at intermediate astrophysical scales of galaxies o…
The radiation instability in modified gravity
Spiros Cotsakis, Dimitrios Trachilis
We study the problem of the instability of inhomogeneous radiation universes in quadratic lagrangian theories of gravity written as a system of evolution equations with constraints…
Singularities and Phenomenological aspects of Asymptotic Safe Gravity
Vasilios Zarikas, Georgios Kofinas
Asymptotic Safety (AS) Program for quantum gravity keeps the same fields and symmetries with General Relativity and studies the associated gravitational action as a fundamental par…