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Publications Influence

Boundary term in metric f (R) gravity: field equations in the metric formalism

- Alejandro Guarnizo, L. Castañeda, J. Tejeiro
- Physics
- 3 February 2010

The main goal of this paper is to get in a straightforward form the field equations in metric f (R) gravity, using elementary variational principles and adding a boundary term in the action, instead… Expand

64 3- PDF

Entanglement Entropy of Black Shells

- J. R. Arenas, J. Tejeiro
- Physics
- 18 August 2011

We present a coherent account of how the entanglement interpretation, thermofield dynamical description and the brick wall formulations (with the ground state correctly identified) fit into a… Expand

3 2- PDF

Can Interplanetary Measures Bound the Cosmological Constant

- J. Cardona, J. Tejeiro
- Physics
- 20 January 1998

Introducing the cosmological constant into Einstein's field equations, we determine a bound for this constant using the values observed from Mercury's perihelion shift. The bound that we find is… Expand

33 2

Noncommutative geometry-inspired rotating black hole in three dimensions

- J. Tejeiro, A. Larrañaga
- Physics
- 7 April 2010

We find a new rotating black hole in three-dimensional anti-de Sitter space using an anisotropic perfect fluid inspired by the noncommutative black hole. We deduce the thermodynamical quantities of… Expand

11 1- PDF

Evolution of magnetic fields through cosmological perturbation theory

- H. Hortúa, L. Castañeda, J. Tejeiro
- Physics
- 4 April 2011

The origin of galactic and extra-galactic magnetic fields is an unsolved problem in modern cosmology. A possible scenario comes from the idea of these fields emerged from a small field, a seed, which… Expand

12 1- PDF

Geodesic deviation equation in Bianchi cosmologies

- D. Cáceres, L. Castañeda, J. Tejeiro
- Physics, Mathematics
- 21 December 2009

We present the Geodesic Deviation Equation (GDE) for the Friedmann Robertson Walker(FRW) universe and we compare it with the equation for Bianchi type I model. We justify consider this cosmological… Expand

8 1- PDF

Gravitational Lensing by Wormholes

- J. Tejeiro, A. Larrañaga
- Physics
- 2005

Natural wormholes and its astrophysical signatures have been suggested in various opportunities. By applying the strong field limit of gravitational lensing theory, we calculate the deflection angle… Expand

17- PDF

Effect of the Rotation of the Universe on the Energy Levels of Hydrogen Atoms

- R. Cortes-Huerto, J. Tejeiro
- Physics
- 2007

Cosmological simulations: a tool for understanding the formation of large scale structure and connection with the Newtonian cosmology

- J. G. Farieta, L. Castañeda, J. Tejeiro
- Physics
- 3 September 2014

In this work we study the cosmological simulations as a tool to understand the formation of large-scale structure of the universe, for this, we show the equivalence of Newtonian cosmology with… Expand

Shear Dynamics in Bianchi I Cosmology

- D. Cáceres, L. Castañeda, J. Tejeiro
- Physics
- 17 March 2010

We present the exact equation for evolution of Bianchi I cosmological model, considering a non-tilted perfect fluid in a matter dominated universe. We use the definition of shear tensor and later we… Expand

4- PDF

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