Holographic phase transitions from higgsed, non abelian charged black holes

We find solutions of a gravity-Yang-Mills-Higgs theory in four dimensions that represent asymptotic anti-de Sitter charged black holes with partial/full gauge symmetry breaking. We then apply the AdS/CFT correspondence to study the strong coupling regime of a $2+1$ quantum field theory at temperature $T$ and finite chemical potential, which undergoes transitions to phases exhibiting the condensation of a composite charged vector operator below a critical temperature $T_c$, presumably describing $p+ip/p$-wave superconductors. In the case of $p+ip$-wave superconductors the transitions are always of second order. But for $p$-wave superconductors we determine the existence of a critical value $\alpha_c$ of the gravitational coupling (for fixed Higgs v.e.v. parameter $\hat m_W$) beyond which the transitions become of first order. As a by-product, we show that the $p$-wave phase is energetically favored over the $p+ip$ one, for any values of the parameters. We also find the ground state solutions corresponding to zero temperature. Such states are described by domain wall geometries that interpolate between $AdS_4$ spaces with different light velocities, and for a given $\hat m_{W}$, they exist below a critical value of the coupling. The behavior of the order parameter as function of the gravitational coupling near the critical coupling suggests the presence of second order quantum phase transitions. We finally study the dependence of the solution on the Higgs coupling, and find the existence of a critical value beyond which no condensed solution is present.Comment: 29 pages, 43 figure

Strange metal crossover in the doped holographic superconductor

In a recent paper, Kiritsis and Li presented a holographic model to study the competition between different orders at finite doping in holographic superconductors. In the present work, we introduce fermions into such model and study the fermionic spectral functions in the normal phase at zero and finite temperatures. Combining analytic and numerical methods, we found that there is a crossover from a strange metal with short lived excitations at small doping, into a Fermi liquid with well defined quasiparticles at large doping. The critical doping at which excitations becomes long lived increases with temperature. The emerging phase diagram is qualitatively similar to that of High Temperature Superconductors.Fil: Giordano, Gaston Luciano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaFil: Grandi, Nicolás Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaFil: Lugo, Adrián René. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaFil: Soto Garrido, Rodrigo. Universidad San Sebastián. Facultad de Ingeniería y Tecnología ; Chil

Systems, sociology and constructivism in the controversy between Maturana and Luhmann about the autopoiesis

Este trabajo busca comparar la conceptualización de la autopoiesis entre Humberto Maturana y Niklas Luhmann. Para ello analizamos convergencias y diferencias en sus definiciones y en el tratamiento de los sistemas sociales; luego, estas son ubicadas en el contexto más amplio de una disputa acerca de lo que se entiende por lo social, y de allí por el sentido de la sociología como una disciplina científica; finalmente, llevamos estas consideraciones al terreno de la epistemología donde, a pesar de haber algunas coincidencias en materia de posiciones filosóficas, la posibilidad de tratar a los sistemas sociales como observadores, marca el direccionamiento diferencial que toman sus constructivismos. Nuestra hipótesis es que la distancia que se observa entre ambos autores responde a consideraciones epistémicas y pre-teóricas del orden de los intereses y los supuestos que condicionan la tarea de la ciencia, las concepciones valorativas y los compromisos éticos acerca de lo humano y lo social.In this paper we seeks to compare the conceptualization of autopoiesis between Humberto Maturana and Niklas Luhmann. First, we analyze convergences and differences in their definitions and in the treatment of social systems; then, we move to the broader context of the dispute about what is meant by the social, and hence the goals of sociology as a scientific discipline; finally, we take these considerations into the field of epistemology where, despite having some coincidences in terms of philosophical positions, the possibility of treating social systems as observers, marks the differential direction taken by their constructivist programs. Our hypothesis is that the distance observed between both authors responds to epistemic and pre-theoretical considerations related to their interests and particular view on science, including value conceptions and ethical commitments about the human and social.Fil: Becerra, Gaston. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires; ArgentinaFil: Giordano, Pedro Martín. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Cs.sociales. Instituto de Invest."gino Germani". Epistemología y Est. Filosoficos de la Accion; Argentin

Effect of varying leaf-fruit ratios on sensory attributes of Malbec wines from SHW-trellised vineyards

Argentina is the fifth world wine producer being Malbec its emblematic variety. Mendoza is the most important Argentinean wine region as it has the greatest implanted area and the most awarded wines. Vineyards for wine production are mainly conducted in the VSP trellis system. The single-high wire (SHW) system is a highly-productive, free cordon trellis system that is widespread in many important wine regions of the world. We evaluated, for the first time in Argentina, the effect of different leaf-fruit ratios on sensory attributes of Malbec wines from vineyards (Clon 598) conducted in SHW spur-pruned single cordon from Bodega Trapiche in Mendoza region (Winkler=V). We imposed different leaf-fruit ratios by two ways. In experiment (1), by varying canopy height at full bloom (H: 0.45, 0.80 m and without topping) and in experiment (2), by varying winter pruning severity (16, 24, 32 and > 32 countable buds m-2 reached by hand pruning, where > 32 simulated a box pruning). We characterized wines by exhaustive chemical analysis (anthocyanins, tannins, phenols, acidity, malic acid, pH, alcohol, glycerol, among others) and performed a descriptive analysis of the wines. Different leaf-fruit ratios resulted in clearly different wines both at biochemist- and sensory-level. The trained sensory panel revealed that wines from 0.80 m and without topping canopies had higher intensity of color, violet hue, acidity, alcohol and astringency than 0.45 m canopies. These descriptors were correlated with a higher anthocianyns, malic acid, alcohol, phenolic compounds and tannins concentration. In addition, these wines had a richer aroma profile (dry plum, red berry, red berry jam, tobacco, oak, red pepper) than 0.45 m-canopies that were identified as citric. On the other hand, the wines of the most extreme pruning levels (16 and >32 buds m-2) were similar in color intensity, violet hue, acidity, alcohol and astringency. These traits were also correlated with its corresponding biochemical variables. At aromatic level, these wines were described to have black pepper, oak, coffee and bell pepper among others. These results suggest that the modulation of leaf-fruit ratios by different approaches such as shoot topping or pruning severity lead us to obtain wines with different sensory attributes. This study allow us to adjust cultural practices intensity with the aim of producing Malbec wines with different typicity from SHW trellised-vineyards.Fil: Ahumada, Gaston Emmanuel. Grupo Peñaflor Sa.; ArgentinaFil: Pirrone, Miguel. Grupo Peñaflor Sa.; ArgentinaFil: Catania, Anibal Alejandro. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Fanzone, Martín Leandro. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Belmonte, Marcelo. Grupo Peñaflor Sa.; ArgentinaFil: Giordano, Carla Valeria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Provincia de Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Universidad Nacional de Cuyo. Instituto Argentino de Investigaciones de las Zonas Áridas; ArgentinaFil: Gonzalez, Carina Veronica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Biología Agrícola de Mendoza. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Instituto de Biología Agrícola de Mendoza; Argentina42nd World Congress of Vine & Wine and 17th general assembly of the International Organisation of Vine and WineGinebraSuizaInternational Organisation of Vine and Win

Self Interactions in Warm Dark Matter: A View from Cosmological Perturbation Theory

We provide a short overview into Self Interacting Warm Dark Matter (SI-WDM) models from the context of Cosmological Perturbation Theory (CPT). The aim is to generalize conventional Cold DM models, by proposing a more general framework both from theoretical as well as from numerical fronts, on the effects of SI-WDM on the linear power spectrum and its consequent imprints on non-linear structure formation. After describing the theoretical background, we present useful analytic expressions for the collision terms in the Boltzmann Hierarchies, and provide some numerical results within the Relaxation Time Approximation (RTA). We consider massive DM particles that decouple from the hot plasma while relativistic. We introduce elastic DM–DM interactions under an ansatz for the scattering amplitude that accounts for massive mediators on an effective way. Paying special attention to the self interaction decoupling mechanisms, we analyze scenarios where the particle undergoes self decoupling while relativistic as well as while non relativistic.Fil: Yunis, Rafael Ignacio. International Center For Relativistic Astrophysics; Italia. Università degli Studi di Roma "La Sapienza"; ItaliaFil: Argüelles, Carlos Raúl. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Scoccola, Claudia Graciela. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Lopez Nacir, Diana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; ArgentinaFil: Giordano, Gaston Luciano. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentin

Self-interacting dark matter in cosmology: Accurate numerical implementation and observational constraints

This paper presents a systematic and accurate treatment of the evolution of cosmological perturbations in self-interacting dark matter models, for particles which decoupled from the primordial plasma while relativistic. We provide a numerical implementation of the Boltzmann hierarchies developed in a previous paper [JCAP, 09 (2020) 041] in a publicly available Boltzmann code and show how it can be applied to realistic DM candidates such as sterile neutrinos either under resonant or non-resonant production mechanisms, and for different field mediators. At difference with traditional fluid approximations - also known as a c eff-c vis parametrizations - our approach follows the evolution of phase-space perturbations under elastic DM interactions for a wide range of interaction models, including the effects of late kinetic decoupling. Finally, we analyze the imprints left by different self interacting models on linear structure formation, which can be constrained using Lyman-α forest and satellite counts. We find new lower bounds on the particle mass that are less restrictive than previous constraints.Fil: Yunis, Rafael Ignacio. International Center for Relativistic Astrophysics Network; Italia. Università degli Studi di Roma "La Sapienza"; ItaliaFil: Arguelles, Carlos R.. International Center for Relativistic Astrophysics Network; Italia. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Scoccola, Claudia Graciela. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Lopez Nacir, Diana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; ArgentinaFil: Giordano, Gaston Luciano. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentin

Effect of shoot trimming on yield, fruit maturity, and reserves in Malbec vineyards under a single high-wire trellis system

Argentina is the world's fifth largest wine producer and Malbec is its most emblematic variety. Vineyards producing high-quality winegrapes are mainly trellised to vertical shoot-positioned systems. The single high-wire (SHW) system is a highly productive free canopy trellising/training system used in many world wine regions. We evaluated, for the first time in Argentina, the effect of different shoot-trimming levels on leaf area development, yield, grape maturity, and reserve levels of Malbec (clone 598) from SHW-trellised vineyards in Mendoza (Winkler = V). We imposed differenttotal leaf areas (TLA) by shoot-trimming, varying shoot length at full bloom (0.45 m, 0.80 m, or untrimmed) during three growing seasons (2017, 2018, and 2019). We measured yield and fruit composition at harvest and soluble and structural reserves in trunk and canes at leaf fall. Different shoot-trimming levels produced different total leaf area development. The 0.8 m treatment produced 30% less TLA than the untrimmed treatment, while the 0.45 m treatment produced 60% less TLA than the untrimmed treatment, consistently among seasons. The treatments affected yield differentially by season. Overall, the untrimmed treatment had the greatest yields. The 0.80 m treatment, while producing high yields in the second season, was not sustained in the third season and declined to similar yield values as the 0.45 m treatment. This drop in yield could be due to the decrease of starch in the trunk during the second season. On the other hand, grape maturity was greater in the 0.80 m and untrimmed treatments. Our results suggest that the untrimmed treatment produces greater sustained yields over time, with good levels of reserves and grape maturity.Fil: Ahumada, Gaston Emmanuel. Grupo Peñaflor S.A; ArgentinaFil: Pirrone, Miguel. Grupo Peñaflor S.A; ArgentinaFil: Segura, Diana María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Biología Agrícola de Mendoza. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Instituto de Biología Agrícola de Mendoza; ArgentinaFil: Belmonte, Marcelo. Grupo Peñaflor S.A; ArgentinaFil: Giordano, Carla Valeria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Provincia de Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Universidad Nacional de Cuyo. Instituto Argentino de Investigaciones de las Zonas Áridas; ArgentinaFil: Gonzalez, Carina Veronica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Biología Agrícola de Mendoza. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Instituto de Biología Agrícola de Mendoza; Argentina72° American Society for Enology and Viticulture National ConferenceCaliforniaEstados UnidosAmerican Society for Enology and Viticultur

High-pressure adsorption phenomena in natural and synthetic zeolites with EAB topology

The high-pressure behaviour and the crystal-fluid interaction of zeolites with EAB topology were investigated byin-situ single-crystal and powder synchrotron X-ray diffraction, both on synthetic and natural samples. The experimentswere conducted using a diamond anvil cell and different pressure transmitting fluids, including: thenon-penetrating silicone oil and the potentially penetrating methanol:ethanol:H$_2$O = 16:3:1 mixture, methanol anddistilled H$_2$O. The zeolites intrinsic compressional behaviour investigated with a non-penetrating fluid showed thesignificant role of the extra framework population on the bulk compressibility. Notably, within the first ~0.5 GPaof the silicone oil ramp, the bulk modulus (K$_{V0}$ = β$_{V0}$$^{-1}$) resulted to be K$_{V0}$ = 62(1) GPa for the natural bellbergiteand K$_{V0}$ = 16(4) GPa for the synthetic K-analogue. The synthetic EAB zeolites demonstrated a high host capacityfor methanol molecules, which were not able to penetrate the natural bellbergite cavities. A comparative analysisbetween the behaviour of zeolites with EAB topology and structurally similar zeolites, such as erionite (ERI topology) and offretite (OFF), is provided

Influence of chitin nanofibers and gallic acid on physical-chemical and biological performances of chitosan-based films

In this work, chitosan films loaded with gallic acid and different content of chitin nanofibers were prepared and subjected to different characterization techniques. The results showed that the inclusion of gallic acid to chitosan films caused moderate decrease in water vapor permeability (by 29 %) and increased tensile strength of films (by 169 %) in comparison to the neat chitosan films. Furthermore, it was found that the addition of chitin nanofibers up to 30 % into chitosan/gallic acid films additionally improved tensile strength (by 474 %) and reduced plasticity of films (by 171 %), when compared to the chitosan/gallic acid films. Increased concentration of chitin nanofibers in films reduced the overall water vapor permeability of films by 51 %. In addition, gallic acid and chitin nanofibers had synergic effect on high chitosan film's antioxidant and antifungal activity toward Botrytis cinerea (both above 95 %). Finally, chitosan/gallic acid/chitin nanofibers films reduced decay incidence of strawberries, increased total soluble solid content, and promoted high production of some polyphenols during cold storage, in comparison to the control chitosan films and uncoated strawberry samples. Hence, these results suggest that chitosan/gallic acid/chitin nanofibers can present eco-sustainable approach for preservation of strawberries, giving them additional nutritional value