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Valparaiso, Chile

The Pontificial Catholic University of Valparaíso , is a university of approximately 13,000 students located in Valparaíso, Chile.It may also be called simply the Universidad Católica de Valparaíso . PUCV attracts students from different areas of Chile as well as hundreds of exchange students from Europe and North America. The University has a central campus in downtown Valparaiso, only a few blocks away from the Chilean Congress, the brand-new Metro, and the Pacific Ocean. One of the drawbacks of being an urban university is the difficulty of growing at the original site of its foundation—several PUCV buildings are on the historic palm-tree-lined Avenida Brasil, but most of its colleges are dispersed in throughout Valparaíso, Viña del Mar, Quilpué and Quillota. Wikipedia.

Muoz E.,Pontifical Catholic University of Valparaiso
Journal of Physics Condensed Matter

The effect of electronphonon scattering processes on the thermoelectric properties of extrinsic graphene was studied. Electrical and thermal resistivity, as well as the thermopower, were calculated within the Bloch theory approximations. Analytical expressions for the different transport coefficients were obtained from a variational solution of the Boltzmann equation. The phonon-limited electrical resistivity π e-ph shows a linear dependence at high temperatures and follows π e-ph∼T 4 at low temperatures, in agreement with experiments and theory previously reported in the literature. The phonon-limited thermal resistivity at low temperatures exhibits a ∼T dependence and achieves a nearly constant value at high temperatures. The predicted Seebeck coefficient at very low temperatures is Q(T) ∼ -π 2K 2 BT/(3eE f), which shows a n -1/2 dependence with the density of carriers, in agreement with experimental evidence. Our results suggest that thermoelectric properties can be controlled by adjusting the Bloch-Grüneisen temperature through its dependence on the extrinsic carrier density in graphene. © 2012 IOP Publishing Ltd. Source

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

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. Source

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

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. Source

Astorino M.,Pontifical Catholic University of Valparaiso
Journal of High Energy Physics

A C-metric type solution for general relativity with cosmological constant is presented in 2+1 dimensions. It is interpreted as a three-dimensional black hole accelerated by a strut. Positive values of the cosmological constant are admissible too. Some embeddings of this metric in the 3+1 space-time are considered: accelerating BTZ black string and a black ring where the gravitational force is sustained by the acceleration. © SISSA 2011. Source

Anabalon A.,Adolfo Ibanez University | Cisterna A.,Pontifical Catholic University of Valparaiso
Physical Review D - Particles, Fields, Gravitation and Cosmology

The aim of this paper is to report on the existence of a wide variety of exact solutions, ranging from black holes to wormholes, when a conformally coupled scalar field with a self-interacting potential containing a linear, a cubic and a quartic self interaction is taken as a source of the energy-momentum tensor, in the Einstein theory with a cosmological constant. Among all the solutions there are two particularly interesting. On the one hand, the spherically symmetric black holes when the cosmological constant is positive; they are shown to be everywhere regular, namely, there is no singularity neither inside nor outside the event horizon. On the other hand, there are spherically symmetric and topological wormholes that connect two asymptotically (anti) de Sitter regions with a different value for the cosmological constant. The regular black holes and the wormholes are supported by everywhere regular scalar field configurations. © 2012 American Physical Society. Source

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