Universal antigravitation, a new physical phenomenon discovered astronomically at
distances of 5 to 8 billion light years, manifests itself as cosmic repulsion that acts between …

We study a gravitational model with curvature-squared R 2 and curvature-quartic R 4
nonlinearities. The effective scalar degree of freedom ϕ (the scalaron) has a multivalued …

Generation of primordial magnetic fields during inflation typically requires the breaking of
conformal invariance of the electromagnetic action. In this paper this has been achieved …

We study multi-dimensional gravitational models with scalar curvature nonlinearities of types
R− 1 and R 4. It is assumed that the corresponding higher dimensional spacetime manifolds …

The book elucidates the current state of the dark energy problem and presents the results of
the authors, who work in this area. It describes the observational evidence for the existence …

In Kaluza-Klein models with toroidal compactification of the extra dimensions, we investigate
soliton solutions of Einstein equation. The nonrelativistic gravitational potential of these …

We consider an effective model of photon interaction with a scalar field corresponding to
conformal excitations of the internal space (geometrical moduli/gravexcitons). We …

We consider higher-dimensional massive Brans-Dicke theory with Ricci-flat internal space.
The background model is perturbed by a massive gravitating source which is pressureless …

We investigate time dependent solutions (S-brane solutions) for product manifolds
consisting of factor spaces where only one of them is non-Ricci-flat. Our model contains a …

We investigate a possibility for construction of the conventional Friedmann cosmology for
our observable Universe if underlying theory is multidimensional Kaluza-Klein model …