Non universality of entanglement convertibility

Recently, it has been suggested that operational properties connected to quantum computation can be alternative indicators of quantum phase transitions. In this work we systematically study these operational properties in 1D systems that present phase transitions of different orders. For this purpose, we evaluate the local convertibility between bipartite ground states. Our results suggest that the operational properties, related to non-analyticities of the entanglement spectrum, are good detectors of explicit symmetries of the model, but not necessarily of phase transitions. We also show that thermodynamically equivalent phases, such as Luttinger liquids, may display different convertibility properties depending on the underlying microscopic model.Comment: 5 pages + references, 4 figures - improved versio

Equilibrium and Disorder-induced behavior in Quantum Light-Matter Systems

We analyze equilibrium properties of coupled-doped cavities described by the Jaynes-Cummings- Hubbard Hamiltonian. In particular, we characterize the entanglement of the system in relation to the insulating-superfluid phase transition. We point out the existence of a crossover inside the superfluid phase of the system when the excitations change from polaritonic to purely photonic. Using an ensemble statistical approach for small systems and stochastic-mean-field theory for large systems we analyze static disorder of the characteristic parameters of the system and explore the ground state induced statistics. We report on a variety of glassy phases deriving from the hybrid statistics of the system. On-site strong disorder induces insulating behavior through two different mechanisms. For disorder in the light-matter detuning, low energy cavities dominate the statistics allowing the excitations to localize and bunch in such cavities. In the case of disorder in the light- matter coupling, sites with strong coupling between light and matter become very significant, which enhances the Mott-like insulating behavior. Inter-site (hopping) disorder induces fluidity and the dominant sites are strongly coupled to each other.Comment: about 10 pages, 12 figure

Photonic superdiffusive motion in resonance radiation trapping

In this work we consider the relation between the jump length probability density function and the line shape function in resonance radiation trapping in atomic vapors. The two-sided jump length probability density function suitable for a unidimensional formulation of radiative transfer is also derived. As a side result, a procedure to obtain the Maxwell distribution of velocities from the Maxwell-Boltzmann distribution of speeds was obtained. General relations that give the asymptotic jump length behavior and the Lévy flight parameter niu for any line shape are obtained. The results are applied to generalized Doppler, generalized Lorentz, and Voigt line shape functions. It is concluded that the lighter the tail of the line shape function, the less heavy the tail of the jump length probability density function, although this tail is always heavy, with niu <= 1

Métricas para la medición de las competencias generales y específicas para el Grado en Ingeniería Informática

El proceso de elaboración de las memorias de grado se ha basado en un conjunto de competencias generales y específicas que, en la mayoría de los casos, entrañan un alto nivel de abstracción y ambigüedad. Por otro lado, la aparición de las competencias no ha ayudado a los alumnos a entender mejor en qué medida alcanzan los objetivos de las diferentes asignaturas, ni a tomar mejores decisiones sobre los pasos a seguir en su carrera profesional. En este artículo se pretende mostrar los resultados obtenidos durante la investigación realizada, que ha tenido como objetivo desgranar las competencias generales y específicas del Grado en Ingeniería Informática, de modo que se ofrezca un acercamiento mucho más concreto y detallado con las asignaturas y, consecuentemente, que pueda justificarse adecuadamente la forma en que las asignaturas permiten alcanzar parcial o completamente las competencias para el grado. Este enfoque, y su orientación a obtener métricas sobre las que valorar el grado en que se han alcanzado los objetivos, también permitirá que los alumnos puedan tomar mejores decisiones a la hora de seleccionar las diferentes asignaturas del grado y conocer para qué competencias están mejor cualificados.SUMMARY -- The process of writing honours theses is based on a set of general and specific competences which, in the majority of cases, entail a high level of abstraction and ambiguity. What is more, the apparition of these competences has not helped students towards a better understanding of the extent to which they attain the objectives of their various subjects, or to make better decisions as regards the steps to follow in their professional careers. The intention of this paper is to show the results obtained during research whose objective was to separate the general and specific competences involved in the Computer Engineering Degree in order to provide a much more concrete and detailed approach to the subjects, which will consequently allow the way in which the subjects permit the partial or total attainment of the competences for the degree to be justified. This approach, and its orientation towards obtaining metrics with which to evaluate the degree to which the objectives have been attained, will also allow students to make better decisions when selecting various degree subjects and to discover for which competences they are best qualified.Peer Reviewe

Key role of anions in the 2D-3D electrochemical deposition of Rh on Ag electrodes

We have studied the electrochemical deposition of Rh on polycrystalline Ag substrates from electrolytes containing chloride and sulphate anions. Chronoamperometry and cyclic voltammetry have been employed in order to elucidate the growth mechanism. Anions play a key role in the growth mechanism and the resulting structures. In the presence of sulphate anions Rh deposition follows a 3D nucleation - growth mechanism, while a 2D nucleation - growth is obeyed in the case of electrolytes containing chloride anions. Ab initio thermodynamics studies support the hypothesis that chloride anions stabilize the Rh deposition favouring a 2D mechanism at low overpotentials in good agreements with the experimental data.Fil: Schulz, Eduardo Nicolás. Universitat Ulm; AlemaniaFil: Ruderman, Andres. Universitat Ulm; AlemaniaFil: Soldano, Germán. Universitat Ulm; Alemania. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; ArgentinaFil: García, Silvana G.. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; ArgentinaFil: Santos, Elizabeth del Carmen. Universitat Ulm; Alemania. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentin

Derechos económicos, sociales y culturales como límites a las políticas públicas: el caso del derecho a la educación en Chile

Concerning to the democratic legitimacy of a government it has become a common place to hold that the election by the citizens of a particular conglomerate to assume the government (democratic principle) gives it the legitimacy necessary and sufficient to implement public policies that its program or political contingency go demanding. The issue in discussion is whether public policy has or has not limit in human rights. Specifically, it will try to answer the question of whether it is legitimate and accordance with the law a public policy of a democratic government even though it threatens or injures social, economic and cultural rights. Specifically, we attempt to answer the issue whether it is legitimate and accordance with the law a public policy which does not fund the higher education state university and neither does not establish free the higher education in Chile, which is one of the most important social demands in recent years.Respecto de la legitimidad democrática de un gobierno se ha convertido en un lugar común sostener que la elección por los ciudadanos de un determinado conglomerado para que asuma el gobierno (principio democrático) dota a este de la legitimidad necesaria y suficiente para implementar políticas públicas que su programa o la contingencia política vayan exigiendo. La cuestión que se aborda es si la política pública tiene o no límite en los derechos humanos. En concreto, se intenta responder a la pregunta de si resulta legítima y ajustada a derecho una política pública de un gobierno democrático aunque amenace o lesione derechos sociales, económicos y culturales. Específicamente, se intenta responder a la cuestión de si es legítima y ajustada a derecho una política pública que no financie la educación superior estatal universitaria y no establezca la gratuidad de la educación superior en Chile, siendo esta una de las demandas sociales más importante en los últimos años

Endoscopic submucosal dissection for the treatment of early esophageal and gastric cancer - initial experience of a western center

BACKGROUND: Endoscopic submucosal dissection is a new Japanese technique characterized by en-bloc resection of the entire lesion irrespective of size, with lower local recurrence when compared to endoscopic mucosal resection. OBJECTIVE: To evaluate the feasibility, early results and complications of the endoscopic submucosal dissection technique for treating early gastric and esophageal cancer at the Endoscopic Unit of Clinics Hospital and Cancer Institute of the São Paulo University. MATERIALS AND METHODS: Twenty patients underwent endoscopic resection using the endoscopic submucosal dissection technique for early gastric or esophageal cancer. The patients were evaluated prospectively as to the executability of the technique, the short-term results of the procedure and complications. RESULTS: Sixteen gastric adenocarcinoma lesions and six esophageal squamous carcinoma lesions were resected. In the stomach, the mean diameter of the lesions was 16.2 mm (0.6-3.5 mm). Eight lesions were type IIa + IIc, four were type IIa and four IIc, with thirteen being well differentiated and three undifferentiated. Regarding the degree of invasion, five were M2, seven were M3, two were Sm1 and one was Sm2. The mean duration of the procedures was 85 min (20-160 min). In the esophagus, all of the lesions were type IIb, with a mean diameter of 17.8 mm (6-30 mm). Regarding the degree of invasion, three were M1, one was M2, one was M3 and one was Sm1. All had free lateral and deep margins. The mean time of the procedure was 78 min (20-150 min). CONCLUSION: The endoscopic submucosal dissection technique was feasible in our service with a high success rate

A randomised trial of the bone formation after maxillary sinus floor augmentation with bovine hydroxyapatite (Cerabone®) and Photobiomodulation: histomorphometric and immunohistochemical analysis

The use of non-autogenous biomaterial to increase bone height in the maxillary sinus has been shown to be effective, but the results are still inconclusive.Eight participants were selected and included in the research. After surgical access with osteotomy on the lateral wall of both maxillary sinuses, these were filled with Cerabone®. Then, by blind randomization, they received one of the following treatments: Filling with Cerabone® (Control group); treatment with Photobiomodulation (PBM), filling with Cerabone® and treatment with low-power laser (PBM group). Biopsies were obtained 30 days after the surgery, using a 2.8 mm internal diameter trephine bur. Qualitative and quantitative histological analyzes were performed and immunohistochemical analyzes of osteocalcin (OCN) and tartrate-resistant acid phosphatase (TRAP) were performed with scores for each of the biological events.The Cerabone® biomaterial demonstrated a high degree of biocompatibility. New bone formation was observed in both groups. In the PBM group, there was greater bone formation and newly formed tissue in an advanced state of bone maturation. The immunostaining of OCN was greater at 30 days in the PBM group than in the control. There was no significant difference in TRAP immunostaining at 30 days between the groups.Low-power laser-mediated by PBM promoted greater bone formation; the newly formed tissue showed a more advanced state of bone maturation in maxillary sinuses filled with Cerabone® biomaterial and treatment with PBM, within the 30-day evaluation period

Statistics of Stellar Populations of Star Clusters and Surrounding Fields in the Outer Disk of the Large Magellanic Cloud

A comparative analysis of Washington color-magnitude diagrams (CMDs) for 14 star clusters and respective surrounding fields in the Large Magellanic Cloud (LMC) outer disk is presented. Each CCD frame including field and respective cluster covers an area of 185 arcmin^2. The stellar population sampled is of intermediate age and metallicity. CMD radial analysis involving star count ratios, morphology and integrated light properties are carried out. Luminosity functions (LFs) are also presented. Two main results are: (i) Within the range 4<R(kpc)<8, the distance from the LMC center is well correlated with the average age in the sense that inner fields are younger and; (ii) Beyond approximately 8kpc the outer fields do not show evidence of a significant intermediate-age component in their stellar populations, as inferred from red giant clump star counts.Comment: 27 pages, 4 tables, 11 figures; accepted by the A