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18 papers · 1 filter
From geodesics of the multipole solutions to the perturbed Kepler problem
J. L. Hernandez-Pastora, J. Ospino
A static and axisymmetric solution of the Einstein vacuum equations with a finite number of Relativistic Multipole Moments (RMM) is written in MSA coordinates up to certain order o…
Dynamical variables in Gauge-Translational Gravity
J. Julve, A. Tiemblo
Assuming that the natural gauge group of gravity is given by the group of isometries of a given space, for a maximally symmetric space we derive a model in which gravity is essenti…
On interrelations between Sibgatullin's and Alekseev's approaches to the construction of exact solutions of the Einstein-Maxwell equations
F. J. Ernst, V. S. Manko, E. Ruiz
The integral equations involved in Alekseev's "monodromy transform" technique are shown to be simple combinations of Sibgatullin's integral equations and normalizing conditions. An…
Physical non-equivalence of the Jordan and Einstein frames
S. Capozziello, P. Martin-Moruno, C. Rubano
We show, considering a specific f(R)-gravity model, that the Jordan frame and the Einstein frame are physically non-equivalent, although they are connected by a conformal transform…
Interacting holographic tachyon model of dark energy
Alberto Rozas-Fernández, David Brizuela, Norman Cruz
We propose a holographic tachyon model of dark energy with interaction between the components of the dark sector. The correspondence between the tachyon field and the holographic d…
Multidimensional quantum cosmic models: New solutions and gravitational waves
Pedro F. Gonzalez-Diaz, Alberto Rozas-Fernandez
This paper contains a discussion on the quantum cosmic models, starting with the interpretation that all of the accelerating effects in the current universe are originated from the…