17 citations · 31 across the 7 of their papers we have counts for
7 papers
Scalar Field Assisted Gravity Inflation
K. Kleidis, V. K. Oikonomou
In this paper we investigate the inflationary dynamics of an gravity in the presence of a canonical scalar field. We specifically choose the cosmological evolution to be a q…
Generating Solutions to the Einstein - Maxwell Equations
I. G. Contopoulos, F. P. Esposito, K. Kleidis +2
The Einstein-Maxwell (E-M) equations in a curved spacetime that admits at least one Killing vector are derived, from a Lagrangian density adapted to symmetries. In this context, an…
Imprints of cosmic strings on the cosmological gravitational wave background
Kostas Kleidis, Demetros B Papadopoulos, Enric Verdaguer +1
The equation which governs the temporal evolution of a gravitational wave (GW) in curved space-time can be treated as the Schrodinger equation for a particle moving in the presence…
Kinetic description of particle interaction with a gravitational wave
A. Anastasiadis, K. Kleidis, H. Varvoglis
The interaction of charged particles, moving in a uniform magnetic field, with a plane-polarized gravitational wave is considered using the Fokker-Planck- Kolmogorov (FPK) approach…
On the adiabatic expansion of the visible space in a higher-dimensional Cosmology
K. Kleidis, D. B. Papadopoulos
In the context of higher-dimensional cosmologies with isotropic visible and internal space and multi-perfect fluid matter, we study the conditions under which adiabatic expansion o…
Particle creation, renormalizability conditions and the mass-energy spectrum in gravity theories of quadratic Lagrangians
K. Kleidis, D. B. Papadopoulos
Massive scalar particle production, due to the anisotropic evolution of a five-dimensional spacetime, is considered in the context of a quadratic Lagrangian theory of gravity. Thos…