Information Geometry of Entanglement Renormalization for free Quantum Fields

We provide an explicit connection between the differential generation of entanglement entropy in a tensor network representation of the ground states of two field theories, and a geometric description of these states based on the Fisher information metric. We show how the geometrical description remains invariant despite there is an irreducible gauge freedom in the definition of the tensor network. The results might help to understand how spacetimes may emerge from distributions of quantum states, or more concretely, from the structure of the quantum entanglement concomitant to those distributions.Comment: 18 pages. 1 eps figure. References added. Some comments adde

Entanglement Renormalization and Two Dimensional String Theory

The entanglement renormalization flow of a (1+1) free boson is formulated as a path integral over some auxiliary scalar fields. The resulting effective theory for these fields amounts to the dilaton term of non-critical string theory in two spacetime dimensions. A connection between the scalar fields in the two theories is provided, allowing to acquire novel insights into how a theory of gravity emerges from the entanglement structure of another one without gravity.Comment: 20 pages. v3 minor corrections. Accepted for publication in Physics Letters

Modeling Sensor Knowledge of a National Hydrologic Information System

In this paper we describe our experience in modeling and using sensor knowledge of a national hydrologic information system in Spain. We developed a web application called VSAIH supported by a knowledge-based system to analyze sensor data and to generate explanations that help users to make decisions based on hydrologic behavior. In the paper, we describe the characteristics of the infrastructure of hydrologic sensors and the representa-tion we used to model sensor knowledge to provide support to the VSAIH application. We also describe semi-automatic procedures that we applied to construct the final model

Comparison of metrics obtained with analytic perturbation theory and a numerical code

We compare metrics obtained through analytic perturbation theory with their numerical counterparts. The analytic solutions are computed with the CMMR post-Minkowskian and slow rotation approximation due to Cabezas et al. (2007) for an asymptotically flat stationary spacetime containing a rotating perfect fluid compact source. The same spacetime is studied with the AKM numerical multi-domain spectral code (Ansorg et al., 2002,2003). We then study their differences inside the source, near the infinity and in the matching surface, or equivalently, the global character of the analytic perturbation scheme.Comment: 4 pages, 2 figures and 1 table. To appear in the proceedings of the 2011 Spanish Relativity Meeting ERE201

Technique to create and identify by landslide susceptibility map applications using gis

Los procesos de remoción de masas, son definidos como “procesos de transporte de material de movilización lenta o rápida de determinado volumen de suelo, roca o ambos, en diversas proporciones, generados por una serie de factores“ (Hauser, 1993 en Martínez, 2009) y constituyen una de las formas más recurrentes de la evolución del relieve terrestre, puesto que son uno de los procesos geológicos más frecuentes, por ende, una de las amenazas naturales más recurrentes, las cuales se originan entre otros casos por efecto de procesos meteorológicos, siendo considerados estos, uno de los factores detonantes tienen mayor incidencia en el aumento de probabilidad de inestabilidad del sistema, incluso una lluvia que no supere los 10 mm en 12 horas, puede resultar el detonante perfecto para la generación de flujos o deslizamientos si el terreno tiene características propias de su naturaleza tales como: una litología rica en arcillas expansivas, un grado de agrietamiento de la roca elevado, una pendiente sobre los 20° y densidad de vegetación con rangos de descubierto, dichos factores combinados condicionan para la generación de desplazamientos.Removal processes mass , are defined as " transport processes material slow or rapid mobilization of specific volume of soil, rock, or both , in varying ratios , generated by a number of factors " ( Hauser , 1993 Martinez, 2009 ) and are one of the most frequent forms of the evolution of terrestrial relief , since they are one of the most common geological processes , therefore , one of the most recurrent natural hazards , which originate from other cases the effect of meteorological processes , these being considered one of the trigger factors have the greatest impact on increasing probability of system instability, even a rain that does not exceed 10 mm in 12 hours , it may be the perfect trigger for the generation of flows or landslides if the soil nature has its own characteristics such as lithology rich in expansive clays, a degree of cracking of the high rock slope of 20° and vegetation density ranges discovered, these factors combined to determine trip generation