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Vina del Mar, Chile

The Adolfo Ibáñez University is a private university in Chile pertaining to the Adolfo Ibáñez Foundation. In 1988, according with the new educational legislation, a new university was founded on the base of the Valparaiso Business School , an old institution for the professional teaching in business administration founded in 1953 thanks to the contribution of Adolfo Ibáñez Boggiano. The new university would take its name some decades later.In the Chilean higher educational scheme, UAI is a private university accredited in the country by CNAP and internationally by AACSB and AMBA.The Adolfo Ibañez University is ranked 1° Private University in Chile according to América Economía, and the CSIC Wikipedia.

Anabalon A.,Adolfo Ibanez University | Anabalon A.,CNRS Physics Laboratory | Astefanesei D.,Pontifical Catholic University of Valparaiso
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2013

We construct a general family of exact non-extremal 4-dimensional black holes in AdS gravity with U(1) gauge fields non-minimally coupled to a dilaton and a non-trivial dilaton potential. These black holes can have spherical, toroidal, and hyperbolic horizon topologies. We use the entropy function formalism to obtain the near horizon data in the extremal limit. Due to the non-trivial self-interaction of the scalar field, the zero temperature black holes can have a finite horizon area even if only the electric field is turned on. © 2013 Elsevier B.V.

Chandia O.,Adolfo Ibanez University
Journal of High Energy Physics | Year: 2014

We study the non-minimal pure spinor string in a curved background. We find that the minimal BRST invariance implies the existence of a non-trivial stress-energy tensor for the minimal and non-minimal variables in the heterotic curved background. We find constraint equations for the b ghost. We construct the b ghost as a solution of these constraints. Open Access, © 2014 The Authors.

Anabalon A.,Adolfo Ibanez University | Anabalon A.,CNRS Physics Laboratory | Astefanesei D.,Pontifical Catholic University of Valparaiso
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2014

Motivated by the recently found 4-dimensional ω-deformed gauged supergravity, we investigate the black hole solutions within the single scalar field consistent truncations of this theory. We construct black hole solutions that have spherical, toroidal, and hyperbolic horizon topologies. The scalar field is regular everywhere outside the curvature singularity and the stress-energy tensor satisfies the null energy condition. When the parameter ω does not vanish, there is a degeneracy in the spectrum of black hole solutions for boundary conditions that preserve the asymptotic Anti-de Sitter symmetries. These boundary conditions correspond to multi-trace deformations in the dual field theory. © 2014 The Authors.

Anabalon A.,Adolfo Ibanez University
Journal of High Energy Physics | Year: 2012

The aim of this paper is to construct accelerated, stationary and axisymmetric exact solutions of the Einstein theory with self interacting scalar fields in (A)dS4. To warm up, the backreaction of the (non)-minimally coupled scalar field is solved, the scalar field equations are integrated and all the potentials compatible with the metric ansatz and Einstein gravity are found. With these results at hand the non-linear sigma model is tackled. The scalar field Lagrangian is generic; neither the coupling to the curvature, neither the metric in the scalar manifold nor the potential, are fixed ab initio. The unique assumption in the analysis is the metric ansatz: it has the form of the most general Petrov type D vacuum solution of general relativity; it is a a cohomogeneity two Weyl rescaling of the Carter metric and therefore it has the typical Plebanski-Demianski form with two arbitrary functions of one variable and one arbitrary function of two variables. It is shown, by an straightforward manipulation of the field equations, that the metric is completely integrable without necessity of specifiying anything in the scalar Lagrangian. This results is that the backreaction of the scalar fields, within this class of metrics, is universal. The metric functions generically show an explicit dependence on a dynamical exponent that allows to smoothly connect this new family of solutions with the actual Plebanski-Demianski spacetime. The remaining field equations imply that the scalar fields follow geodesics in the scalar manifold with an affine parameter given by a non-linear function of the spacetime coordinates and define the on-shell form of the potential plus a functional equation that it has to satisfy. To further find the exact form of the potential the simplest case associated to a flat scalar manifold is taken. The most general potential compatible with the Einstein theory and the metric ansatz is constructed in this case and it is shown that it has less symmetry than the maximal compact subgroup of the coset construction. Finally, the most general family of (A)dS4 static hairy black holes is explicitly constructed and its properties are outlined. © 2012 SISSA.

Anabalon A.,Adolfo Ibanez University | Oliva J.,Austral University of Chile
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2012

In this paper two things are done. First, it is pointed out the existence of exact asymptotically flat, spherically symmetric black holes when a self-interacting, minimally coupled scalar field is the source of the Einstein equations in four dimensions. The scalar field potential is recently found to be compatible with the hairy generalization of the Plebanski-Demianski solution of general relativity. This paper describes the spherically symmetric solutions that smoothly connect the Schwarzschild black hole with its hairy counterpart. The geometry and scalar field are everywhere regular except at the usual Schwarzschild-like singularity inside the black hole. The scalar field energy momentum tensor satisfies the null-energy condition in the static region of spacetime. The first law holds when the parameters of the scalar field potential are fixed under thermodynamical variation. Second, it is shown that an extra, dimensionless parameter, present in the hairy solution, allows to modify the gravitational field of a spherically symmetric black hole in a remarkable way. When the dimensionless parameter is increased, the scalar field generates a flat gravitational potential that, however, asymptotically matches the Schwarzschild gravitational field. Finally, it is shown that a positive cosmological constant can render the scalar field potential convex if the parameters are within a specific rank. © 2012 American Physical Society.

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