44 citations
5 papers
AdS and stabilized extra dimensions in multidimensional gravitational models with nonlinear scalar curvature terms 1/R and R^4
Uwe Guenther, Alexander Zhuk, Valdir Bezerra +1
We study multidimensional gravitational models with scalar curvature nonlinearities of the type 1/R and R^4. It is assumed that the corresponding higher dimensional spacetime manif…
Squared-field amplitude modulus and radiation intensity nonequivalence within nonlinear slabs
Alberto Lencina, Pablo Vaveliuk
This paper presents a novel approach to wave propagation inside the Fabry-Perot framework. It states that the time-averaged Poynting vector modulus could be nonequivalent with the…
Massive scalar fields in the early Universe
Uwe Guenther, Alexander Zhuk
We discuss the role of gravitational excitons/radions in different cosmological scenarios. Gravitational excitons are massive moduli fields which describe conformal excitations of…
Structure of the Isovector Dipole Resonance in Neutron-Rich Nucleus and Direct Decay from Pygmy Resonance
T. N. Leite, N. Teruya
The structure of the isovector dipole resonance in neutron-rich calcium isotope, , has been investigated by implementing a careful treatment of the differences of neutron…
Remarks on some quantum effects in the spacetime of a cosmic string
Geusa de A. Marques, V. B. Bezerra
We study the behaviour of a non-relativistic quantum particle interacting with different potentials, in the background spacetime generated by a cosmic string. We find the energy sp…