Sergio del Campo
Valparaiso University
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Featured researches published by Sergio del Campo.
Physics Letters B | 2001
Mauricio Cataldo; Norman Cruz; Sergio del Campo; Samuel Lepe
Abstract In this Letter we study adiabatic anisotropic matter filled Bianchi type I models of the Kasner form together with the cosmological holographic bound. We find that the dominant energy condition and the holographic bound give precisely the same constraint on the scale factor parameters that appear in the metric.
Physics Letters B | 2000
Mauricio Cataldo; Norman Cruz; Sergio del Campo; Alberto García
Abstract A (2+1)-static black hole solution with a nonlinear electric field is derived. The source to the Einstein equations is a nonlinear electrodynamics, satisfying the weak energy conditions, and it is such that the energy momentum tensor is traceless. The obtained solution is singular at the origin of coordinates. The derived electric field E ( r ) is given by E ( r )= q / r 2 , thus it has the Coulomb form of a point charge in the Minkowski spacetime. This solution describes charged (anti)-de Sitter spaces. An interesting asymptotically flat solution arises for Λ =0.
Physical Review D | 2003
Sergio del Campo; Ramon Herrera
In this paper we study a type of one-field model for open inflationary universe models in the context of the Jordan-Brans-Dicke theory. In the scenario of a one-bubble universe model we determine and characterize the existence of the Coleman-De Lucia instanton, together with the period of inflation after tunnelling has occurred. Our results are analogous to those found in the Einstein General Relativity models.
General Relativity and Gravitation | 2001
Mauricio Cataldo; Sergio del Campo; Alberto García
We propose an approach for constructing spatial slices of (3+1) spacetimes with cosmological constant but without a matter content, which yields (2+1) vacuum with Λ solutions. The reduction mechanism from (3+1) to (2+1) gravity is supported on a criterion in which the Weyl tensor components are required to vanish together with a dimensional reduction via an appropriate foliation. By using an adequate reduction mechanism from the Plebański–Carter[A] solution in (3+1) gravity, the (2+1) BTZ solution can be obtained.
Physical Review D | 2002
Sergio del Campo
The flatness of an accelerating universe model (characterized by a dark energy scalar field
Monthly Notices of the Royal Astronomical Society | 2003
Sergio del Campo
ensuremath{chi})
Physical Review D | 2001
Mauricio Cataldo; Sergio del Campo; Patricio Salgado
is mimicked from a curved model that is filled with, apart from the cold dark matter component, a quintessencelike scalar field Q. In this process, we characterize the original scalar potential
Monthly Notices of the Royal Astronomical Society | 2000
Sergio del Campo; Norman Cruz
V(Q)
Journal of Physics: Conference Series | 2010
Sergio del Campo; Ramon Herrera; Diego Pavon
and the mimicked scalar potential
Physics Letters B | 1991
Sergio del Campo
V(ensuremath{chi})