cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Acceleration of polytropic solar wind: Parker Solar Probe observation and one-dimensional model
Creators: name: Shi, Chen
name: Velli, Marco
name: Bale, Stuart D.
name: Réville, Victor
name: Maksimović, Milan
name: Dakeyo, Jean-Baptiste
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The acceleration of the solar coronal plasma to supersonic speeds is one of the most fundamental yet unresolved problem in heliophysics. Despite the success of Parker's pioneering theory on an isothermal solar corona, the realistic solar wind is observed to be non-isothermal, and the decay of its temperature with radial distance usually can be fitted to a polytropic model. In this work, we use Parker Solar Probe data from the first nine encounters to estimate the polytropic index of solar wind protons. The estimated polytropic index varies roughly between 1.25 and 1.5 and depends strongly on solar wind speed, faster solar wind on average displaying a smaller polytropic index. We comprehensively analyze the 1D spherically symmetric solar wind model with polytropic index $γ\in [1,5/3]$. We derive a closed algebraic equation set for transonic stellar flows, i.e. flows that pass the sound point smoothly. We show that an accelerating wind solution only exists in the parameter space bounded by $C_0/C_g < 1$ and $(C_0/C_g)^2 > 2(γ-1)$ where $C_0$ and $C_g$ are the surface sound speed and one half of the escape velocity of the star, and no stellar wind exists for $γ> 3/2$. With realistic solar coronal temperatures, the observed solar wind with $γ\gtrsim 1.25$ cannot be explained by the simple polytropic model. We show that mechanisms such as strong heating in the lower corona that leads to a thick isothermal layer around the Sun and large-amplitude Alfvén wave pressure are necessary to remove the constraint in $γ$ and accelerate the solar wind to high speeds.
The fractional saturable impurity
Creators: name: Molina, Mario I.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We examine analytically and numerically the effect of fractionality on a saturable bulk and surface impurity embedded in a 1D lattice. We use a fractional Laplacian introduced previously by us, and by the use of lattice Green functions we are able to obtain the bound state energies and amplitude profiles, as a function of the fractional exponent $s$ and saturable impurity strength $χ$ for both, surface and bulk impurity. The transmission is obtained in closed form as a function of $s$ and $χ$, showing strong deviations from the standard case, at small fractional exponent values. The selftrapping of an initially-localized excitation is qualitatively similar for the bulk and surface mode, but in all cases complete confinement is obtained at $s\rightarrow 0$, as shown theoretically and observed numerically.
description: 7 pages, 5 figures. arXiv admin note: substantial text overlap with arXiv:2108.10974
El lector detective en El desfile del amor de Sergio Pitol por Cinthya Olguín Díaz
Creators: name: Olguín Díaz, Cinthya
Publisher: name: FILHA
Year: 2023

description: Denominamos “lector detective” a aquel personaje lector que apoyado o motivado por untexto realiza una labor de detección sobre un enigma del pasado. Nos interesa analizar al lectordetective en El desfile del amor de Sergio Pitol para responder las siguientes preguntas: cómo esrepresentado el lector detective, qué y cómo lee y de qué forma su lectura beneficia o dificulta suinvestigación. Nuestra aproximación teórica es interdisciplinaria y se apoya en conceptos de lacultura, la historiografía y la teoría literaria. Palabras clave: Sergio Pitol, lectura, hermenéutica, nuevo historicismo, metaficción. Abstract A “Detective reader” is a reading character who is supported or motivated by a text toinvestigate about a past enigma. In this paper the detective reader is analyzed in El desfile del amor(The Love Parade) by Sergio Pitol, to find answers to the following questions: how the detectivereader is represented, what and how he/she reads, and the way the reading benefits or makes theinvestigation difficult. The theoretical approach of this essay is interdisciplinary and it is supported byconcepts of culture, historiography, and literary theory. Keywords: Sergio Pitol, reading, hermeneutics, new historicism, metafiction.
description: FILHA, Vol. 18 Núm. 29 (2023): Vol. 18, No. 29, Julio 2023
Modos de atención a la Tierra: materiales y prácticas artísticas frente al Antropoceno
Creators: name: Oliveira Dias, Susana
Publisher: name: FILHA
Year: 2023

description: El Antropoceno es un concepto que necesita ser problematizado desde diferentes perspectivas. Esto porque, si vamos a tener un “tiempo de catástrofes”, como lo define Stengers (2015) necesitamos reflexionar sobre cómo vamos a pensar y caracterizar la destrucción y cómo actuar de cara a eso. En este artículo elijo pensar el Antropoceno con materiales y prácticas artísticas, considerándolos lugares privilegiados para la creación de nuevas formas de atención a la Tierra. Busco escribir con obras que permitan “percibir-hacer bosque” (Dias, 2020) es decir, que dejen la mera denuncia y el deseo de convencer a la población y que reinventen la relación con los desastres, traigan nuevas formas de pensar las potencialidades de los encuentros con los pueblos indígenas y las ciencias climáticas, así como problematizar la pérdida del cosmos (Lawrence, 1990). Las artes emergen como un lugar no para la mera expresión de opiniones o subjetividad de los artistas, sino como un espacio de experimentación sin precedentes de las relaciones con la Tierra desde perspectivas más allá del horizonte humano.
description: FILHA, Vol. 17 Núm. 27 (2022): Vol. 17, No 27, julio-diciembre 2022
Teoría sobre el concepto innato de unidad y su proyección en la interpretación del mundo por Héctor Andrés Loreto de Vázquez
Creators: name: Loreto De Vázquez, Héctor Andrés
Publisher: name: FILHA
Year: 2023

description: Se expone, en este trabajo, una teoría que muestra cómo es que el hombre extrae desdesu propio fondo ciertas ideas innatas que proyecta en los entes que percibe y que piensa,particularmente las ideas de ser y de unidad. Además, se muestra que el grado de proyección deestas ideas (las ideas de ser y de unidad) sobre los entes que el entendimiento percibe, está enfunción del grado de alegría o de angustia que un hombre siente. Para el análisis de las ideas innatasy de las emociones, me baso sobre todo en la filosofía racionalista (Descartes, Spinoza y Leibniz).Aunque, para el análisis de las emociones, también me apoyo en la filosofía heideggeriana. Porúltimo, reflexionando a partir del horizonte del pensamiento analógico, trazado por Beuchot, seexpone cómo esta teoría innatista de la proyección puede servir para responder al relativismoabsoluto de la posmodernidad. Palabras clave: Innatismo, Epistemología, Proyección, Entes, Ser, Unidad, Cogito. Abstract This paper presents a theory that demonstrates how humans extract certain innate ideasfrom their own depths and project them onto the entities they perceive and think, particularly the ideasof being and unity. Furthermore, it is shown that the degree of projection of these ideas (the ideas ofbeing and unity) onto the perceived entities is influenced by the level of joy or distress experiencedby an individual. For the analysis of innate ideas and emotions, the focus is primarily on rationalistphilosophy (Descartes, Spinoza, and Leibniz). However, the philosophy of Heidegger is also used toexamine emotions. Finally, drawing on the horizon of analogical thinking outlined by Beuchot, it isdiscussed how this innatist theory of projection can respond to the absolute relativism ofpostmodernity. Keywords: Innatism, Epistemology, Projection, Entities, Being, Unity, Cogito.
description: FILHA, Vol. 18 Núm. 29 (2023): Vol. 18, No. 29, Julio 2023
Polarimetric analysis of thermal emission from both reciprocal and nonreciprocal materials using fluctuational electrodynamics
Creators: name: Yang, Chiyu
name: Cai, Wenshan
name: Zhang, Zhuomin M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Coherent thermal emission for a given polarization has been observed in many metamaterials with micro/nanostructures. A complete description of the thermal emission requires the full characterization of the spectral angular emissivity for all polarization states. Emissivity is typically obtained based on the equivalence between the absorptivity and emissivity according to Kirchhoff's law; however, such relation may be invalid for nonreciprocal media. More general approaches without the constrain of optical reciprocity are necessary when dealing with magneto-optical materials and magnetic Weyl semimetals. Here, a polarimetric analysis of thermal emission is carried out based on fluctuational electrodynamics. The Stokes parameters are obtained using coherency matrix for a multilayered system with anisotropic media, including nonreciprocal materials. The results demonstrate that thermal emission may be circularly or linearly polarized in different directions and frequencies. The findings are consistent with the statements of the modified Kirchhoff's law provided by several groups in recent years, and therefore, justify the appropriateness of both the direct and indirect methods. This study will help the design of desired thermal emitters for energy harvesting and thermal control.
description: 11 pages, 8 figures
Musical ethnocentrism in Large Language Models
Creators: name: Kruspe, Anna
Publisher: name: arXiv
Year: 2025
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Large Language Models (LLMs) reflect the biases in their training data and, by extension, those of the people who created this training data. Detecting, analyzing, and mitigating such biases is becoming a focus of research. One type of bias that has been understudied so far are geocultural biases. Those can be caused by an imbalance in the representation of different geographic regions and cultures in the training data, but also by value judgments contained therein. In this paper, we make a first step towards analyzing musical biases in LLMs, particularly ChatGPT and Mixtral. We conduct two experiments. In the first, we prompt LLMs to provide lists of the "Top 100" musical contributors of various categories and analyze their countries of origin. In the second experiment, we ask the LLMs to numerically rate various aspects of the musical cultures of different countries. Our results indicate a strong preference of the LLMs for Western music cultures in both experiments.
Los intérpretes de la conquista española: Malinche y Felipillo desde la perspectiva literaria
Creators: name: González Núñez, Claudia Liliana
Publisher: name: FILHA
Year: 2023

description: El artículo busca revisar la figura del intérprete como mediador lingüístico y cultural, a través de los personajes Malinche y Felipillo, quienes sirvieron respectivamente de lenguas a los conquistadores Hernán Cortés y Francisco Pizarro en los procesos de dominación de los imperios Mexica e Inca. Se propone el análisis de dos novelas hispanoamericanas contemporáneas de temática virreinal con el interés de describir la representación del intérprete desde la perspectiva de la ficción literaria como un discurso alterno al registro histórico y a la historia de la traducción. El artículo discute los conceptos de intérprete, intérprete bilateral, así como el término de traducción cultural en el afán de reflexionar la compleja tarea de la comunicación, entre dos culturas con distinta lengua. Finalmente, la literatura se presenta como otro soporte discursivo con la facultad de abrir nuevas miradas de conocimiento y comprensión sobre la historia, la memoria y la identidad.
description: FILHA, Vol. 17 Núm. 27 (2022): Vol. 17, No 27, julio-diciembre 2022
Directrices para la materialización del derecho de la reparación integral en contextos plurales. Mención especial del caso boliviano
Creators: name: Pérez Arce, Christian Nelio
Publisher: name: figshare
Year: 2023
Subjects: Legal practice, lawyering and the legal profession
Human rights and justice issues (excl. law)

description: Esta investigación realiza un estudio relacionado con el derecho a la reparación integral de las víctimas en contextos plurales, en particular en Bolivia. Desde un punto de vista metodológico, es una investigación descriptiva, analítica y propositiva, que, en su construcción, realiza una revisión bibliográfica amplia, considerando documentos, datos y una serie de artículos publicados, y la jurisprudencia de la Corte Interamericana de Derechos Humanos. Sin embargo, se observa que existen avances normativos y jurisprudenciales en materia de reparaciones, que las víctimas directas e indirectas de contextos plurales no tienen garantizado el derecho a la reparación integral, al existir limitaciones fácticas en el marco normativo e institucional que materialice plenamente dicho derecho. El objetivo es trazar una serie de criterios que posibiliten de forma oportuna la materialización de los estándares del derecho a la reparación integral a víctimas de delitos, violaciones de derechos humanos, y otras cuestiones técnico-jurídicas, acordes a las particularidades presentes en contextos plurales.
A characterization method for low-frequency environmental noise in LIGO
Creators: name: Valdes, Guillermo
name: Hines, Adam
name: Nelson, Andrea
name: Zhang, Yanqi
name: Guzman, Felipe
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We present a method to characterize the noise in ground-based gravitational-wave observatories such as the Laser Gravitational-Wave Observatory (LIGO). This method uses linear regression algorithms such as the least absolute shrinkage and selection operator (LASSO) to identify noise sources and analyzes the detector output versus noise witness sensors to quantify the coupling of such noise. Our method can be implemented with currently available resources at LIGO, which avoids extra coding or direct experimentation at the LIGO sites. We present two examples to validate and estimate the coupling of elevated ground motion at frequencies below 10 Hz with noise in the detector output.
Graph Product Multilayer Networks: Spectral Properties and Applications
Creators: name: Sayama, Hiroki
Publisher: name: arXiv
Year: 2017
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: This paper aims to establish theoretical foundations of graph product multilayer networks (GPMNs), a family of multilayer networks that can be obtained as a graph product of two or more factor networks. Cartesian, direct (tensor), and strong product operators are considered, and then generalized. We first describe mathematical relationships between GPMNs and their factor networks regarding their degree/strength, adjacency, and Laplacian spectra, and then show that those relationships can still hold for nonsimple and generalized GPMNs. Applications of GPMNs are discussed in three areas: predicting epidemic thresholds, modeling propagation in nontrivial space and time, and analyzing higher-order properties of self-similar networks. Directions of future research are also discussed.
description: 17 pages, 8 figures, 1 table
Unexpected validity of Schottky's conjecture for two-stage field emitters: a response via Schwarz-Christoffel transformation
Creators: name: Marcelino, Edgar
name: de Assis, Thiago A.
name: de Castilho, Caio M. C.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The electric field in the vicinity of the top of an emitter with a profile consisting of a triangular protrusion on an infinite line is analytically obtained when this system is under an external uniform electric field. The same problem is also studied when the profile features a two-stage system, consisting of a triangular protrusion centered on the top of a rectangular one on a line. These problems are approached by using a Schwarz-Christoffel conformal mapping, and the validity of Schottky's conjecture (SC) is discussed. The authors provide an analytical proof of SC when the dimensions of the upper-stage structure are much smaller than those of the lower-stage structure, for large enough aspect ratios and considering that the field enhancement factor (FEF) of the rectangular structure is evaluated on the center of the top of the structure, while the FEF of the triangular stage is evaluated near the upper corner of the protrusion. The numerical solution of our exact equations shows that SC may remain valid even when both stages feature dimensions of the same order of magnitude, reinforcing the validity of SC for multistage field emitters.
description: 7 pages, 10 figures. Version 3: published version
Abel transforms with low regularity with applications to X-ray tomography on spherically symmetric manifolds
Creators: name: de Hoop, Maarten V.
name: Ilmavirta, Joonas
Publisher: name: arXiv
Year: 2017
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We study ray transforms on spherically symmetric manifolds with a piecewise $C^{1,1}$ metric. Assuming the Herglotz condition, the X-ray transform is injective on the space of $L^2$ functions on such manifolds. We also prove injectivity results for broken ray transforms (with and without periodicity) on such manifolds with a $C^{1,1}$ metric. To make these problems tractable in low regularity, we introduce and study a class of generalized Abel transforms and study their properties. This low regularity setting is relevant for geophysical applications.
description: 41 pages
Holes and magnetic polarons in a triangular lattice antiferromagnet
Creators: name: van de Kraats, Jasper
name: Nielsen, Kristian K.
name: Bruun, Georg M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The intricate interplay between charge motion and magnetic order in geometrically frustrated lattices is central for the properties of many two-dimensional quantum materials. The triangular lattice antiferromagnet is a canonical example of a frustrated system, and here we analyse the dynamics of a hole in such a lattice focusing on observables that have become accessible in a new generation of experiments. Using the $t$-$J$ model, we solve the problem exactly within linear spin wave theory in the limit of strong magnetic interactions, showing that the ground state is described by a coherent state of spin waves. The derivation highlights the crucial role played by the interaction between a static hole and the neighboring spins, which originates in the geometric frustration and has often been omitted in earlier works. Furthermore, we show that the non-equilibrium dynamics after a hole has abruptly been inserted at a lattice site is given exactly by a coherent state with time-dependent oscillatory coefficients. Physically, this describes a burst of magnetic frustration propagating through only two-thirds of the lattice sites, since a destructive interference of spin waves leaves spins parallel to that removed by the hole unperturbed. After the wave has propagated through the lattice, the magnetization relaxes to that of the ground state. We then use our analytical solution to benchmark the widely used self-consistent Born approximation (SCBA), showing that it is very accurate also for a triangular lattice. The magnetic polaron spectrum is analysed for general magnetic interactions using the SCBA, and we compare our results with those for a square lattice.
description: 12 pages, 9 figures
Entre el dolor y la alegría de existir: aproximaciones a Emil Cioran y Albert Cossery
Creators: name: Nava Valdés, Belén
Publisher: name: FILHA
Year: 2023

description: Las siguientes líneas se elucidan referentes a la familiaridad de Emil Cioran y Albert Cossery. En este texto se abordan temas que van desde la escritura marginal hasta el repudio, siempre latente, de la civilización y todo lo que ella acarrea. Las maneras adoptadas para resquebrajar los ideales del ser humano, las formas de retratar las más ínfimas miserias, concentran dosis de sarcasmo, palabras cáusticas semejantes a navajas afiladas y risas estridentes. No obstante, a pesar de las similitudes, Cioran y Cossery son diametralmente opuestos en los puntos concluyentes; a saber, mientras uno veía en la vida la razón suficiente para una celebración constante, para el otro vivir implicaría un tormento, cuya única salida se muestra inaccesible.
description: FILHA, Vol. 17 Núm. 27 (2022): Vol. 17, No 27, julio-diciembre 2022
Origin and Structures of Solar Eruptions I: Magnetic Flux Rope (Invited Review)
Creators: name: Cheng, X.
name: Guo, Y.
name: Ding, M. D.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Coronal mass ejections (CMEs) and solar flares are the large-scale and most energetic eruptive phenomena in our solar system and able to release a large quantity of plasma and magnetic flux from the solar atmosphere into the solar wind. When these high-speed magnetized plasmas along with the energetic particles arrive at the Earth, they may interact with the magnetosphere and ionosphere, and seriously affect the safety of human high-tech activities in outer space. The travel time of a CME to 1 AU is about 1-3 days, while energetic particles from the eruptions arrive even earlier. An efficient forecast of these phenomena therefore requires a clear detection of CMEs/flares at the stage as early as possible. To estimate the possibility of an eruption leading to a CME/flare, we need to elucidate some fundamental but elusive processes including in particular the origin and structures of CMEs/flares. Understanding these processes can not only improve the prediction of the occurrence of CMEs/flares and their effects on geospace and the heliosphere but also help understand the mass ejections and flares on other solar-type stars. The main purpose of this review is to address the origin and early structures of CMEs/flares, from multi-wavelength observational perspective. First of all, we start with the ongoing debate of whether the pre-eruptive configuration, i.e., a helical magnetic flux rope (MFR), of CMEs/flares exists before the eruption and then emphatically introduce observational manifestations of the MFR. Secondly, we elaborate on the possible formation mechanisms of the MFR through distinct ways. Thirdly, we discuss the initiation of the MFR and associated dynamics during its evolution toward the CME/flare. Finally, we come to some conclusions and put forward some prospects in the future.
description: 46 pages, 9 figures, published in Sci. China Earth Sci. (2017)
Shannon entropy analysis of the stretched exponential process : application to various shear induced multilamellar vesicles system
Creators: name: Maruoka, Hirokazu
name: Nishimura, Akio
name: Yoshida, Makoto
name: Hatada, Keisuke
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The stretched exponential function, $\exp[-(t/τ_{K})^β]$, describes various relaxation processes while it has been suggested that the power exponent, $β$ is derived from the non-uniformity of the process. In this paper, we attempted to estimate this non-uniformity by introducing Shannon entropy. Shannon entropy evaluates the average information contents of the distribution function, which reflects statistical homogeneity. We investigated the relaxation process of shear induced multilamellar system, which is described with the stretched exponential function. Three types of shear (constant, square, sine) at different frequencies are attempted in order to determine their effects on the relaxation process. We found that the Shannon entropy to which the first moment was introduced is maximized at $β~=~1$ : a single exponential. The Shannon entropy of sine shear experiments exhibited the frequency dependence. Thus it is interpreted that the increase of the intensity of shearing and the thermodynamic entropy are reflected on the Shannon entropy. We discussed the meaning of the maximum Shannon entropy in terms of various points of view, it was found that it corresponds to the diffusion process free from the restriction such as geometrical constraints. The constraints and the non-uniformity of process were successfully estimated by Shannon entropy. This study gives a new insight of entropy in general.
El pensamiento e Michel Foucault en la Arqueología del saber
Creators: name: Gutiérrez Carmona, Alejandro Francisco
Publisher: name: FILHA
Year: 2023

description: Este trabajo muestra la contribución epistemológica y metodológica que realizó MichelFoucault en su obra la Arqueología del Saber, a partir de pensadores que estuvieron cercanos alautor, tales como Gilles Deleuze, podremos observar cuál fue el pensamiento que el filósofo francésdesplegó en su arqueología del saber por medio de referencias teóricas y epistemológicas paracomprender mejor su método arqueológico y su vinculación con otros saberes, por ejemplo, con lareflexión filosófica, la historia e incluso, con un tipo de historia de las ideas. Palabras clave: historia, arqueología, pensamiento, método. Abstract This work showcases the epistemological and methodological contributions made byMichel Foucault in his book "The Archaeology of Knowledge." Drawing from thinkers closelyassociated with the author, such as Gilles Deleuze, we can observe the philosophical ideas that theFrench philosopher unfolded in his archaeology of knowledge through theoretical and epistemologicalreferences. This enables a better understanding of his archaeological method and its connectionswith other forms of knowledge, including philosophical reflection, history, and even a type of historyof ideas. Keywords: history, archaeology, thought, method.
description: FILHA, Vol. 18 Núm. 29 (2023): Vol. 18, No. 29, Julio 2023
Emergent Anti-ferromagnetism in a Y -Shaped Kekulé Graphene
Creators: name: Wen, Chenyue
name: Han, Wanpeng
name: Feng, Xukun
name: Zhu, Xingchuan
name: Zhao, Weisheng
name: Yang, Shengyuan A.
name: Feng, Shiping
name: Guo, Huaiming
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Antiferromagnetic (AF) transitions of birefringent Dirac fermions created by a Y-shaped Kekulé distortion in graphene are investigated by the mean-field theory and the determinant quantum Monte Carlo simulations. We show that the quantum critical point can be continuously tuned by the bond-modulation strength, and the universality of the quantum criticality remains in the Gross-Neveu-Heisenberg class. The critical interaction scales with the geometric average of the two velocities of the birefringent Dirac cones and decreases monotonically between the uniform and the completely depleted limits. Since the AF critical interaction can be tuned to very small values, antiferromagnetism may emerge automatically, realizing the long-sought magnetism in graphene. These results enrich our understanding of the semimetal-AF transitions in Dirac-fermion systems and open a new route to achieving magnetism in graphene.
Duality of channels and codes
Creators: name: Renes, Joseph M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: Information Theory (cs.IT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: For any given channel $W$ with classical inputs and possibly quantum outputs, a dual classical-input channel $W^\perp$ can be defined by embedding the original into a channel $\mathcal N$ with quantum inputs and outputs. Here we give new uncertainty relations for a general class of entropies that lead to very close relationships between the original channel and its dual. Moreover, we show that channel duality can be combined with duality of linear codes, whereupon the uncertainty relations imply that the performance of a given code over a given channel is entirely characterized by the performance of the dual code on the dual channel. This has several applications. In the context of polar codes, it implies that the rates of polarization to ideal and useless channels must be identical. Duality also relates the tasks of channel coding and privacy amplification, implying that the finite blocklength performance of extractors and codes is precisely linked, and that optimal rate extractors can be transformed into capacity-achieving codes, and vice versa. Finally, duality also extends to the EXIT function of any channel and code. Here it implies that for any channel family, if the EXIT function for a fixed code has a sharp transition, then it must be such that the rate of the code equals the capacity at the transition. This may give a different route to proving a code family achieves capacity by establishing sharp EXIT function transitions.
description: v2: 22 pages. fixed idempotency of duality for symmetric channels and added a statement about binary-input channels; v1: 23 pages, 2 figures
Testing Bayesian reconstruction methods from peculiar velocities
Creators: name: Valade, Aurélien
name: Libeskind, Noam I
name: Hoffman, Yehuda
name: Pfeifer, Simon
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Reconstructing the large scale density and velocity fields from surveys of galaxy distances, is a major challenge for cosmography. The data is very noisy and sparse. Estimated distances, and thereby peculiar velocities, are strongly affected by the Malmquist-like lognormal bias. Two algorithms have been recently introduced to perform reconstructions from such data: the Bias Gaussian correction coupled with the Wiener filter (BGc/WF) and the HAMLET implementation of the Hamiltonian Monte Carlo forward modelling. The two methods are tested here against mock catalogs that mimic the Cosmicflows-3 data. Specifically the reconstructed cosmography and moments of the velocity field (monopole, dipole) are examined. A comparison is made to the ``exact'' wiener filter as well - namely the Wiener Filter in the unrealistic case of zero observational errors. This is to understand the limits of the WF method. The following is found. In the nearby regime ($d \lesssim 40 {\rm Mpc}/h$) the two methods perform roughly equally well. HAMLET does slightly better in the intermediate regime ($ 40 \lesssim d \lesssim 120 {\rm Mpc}/h$). The main differences between the two appear in the most distant regime ($d \gtrsim 120 {\rm Mpc}/h$), close to the edge of the data. The HAMLET outperforms the BGc/WF in terms of better and tighter correlations, yet in the distant regime the HAMLET yields a somewhat biased reconstruction. Such biases are missing from the BGc/WF reconstruction. In sum, both methods perform well and create reliable reconstructions with significant differences apparent when details are examined.
description: 13 pages, 12 figures
Kinetics of the chiral phase transition in a quark-meson $σ$ model
Creators: name: van Hees, H.
name: Meistrenko, A.
name: Greiner, C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Using the two-particle irreducible (2PI) $Φ$-functional formalism for self-consistent approximations of a linear-$σ$ model for quarks and mesons in and out of equilibrium, the build-up of fluctuations of net-baryon number during the time evolution of an expanding fireball is studied within a kinetic theory for the order parameter ($σ$ field) and quark distribution functions. Initializing the system with purely Gaussian fluctuations a fourth-order cumulant is temporarily built up due to the evolution of the $σ$-field. This is counterbalanced, however, by the dissipative evolution due to collisions between quarks, anti-quarks, mesons, and the mean field, depending on the speed of the fireball expansion.
description: Presented at XXIX$^{\text{th}}$ International Conference on Ultra-relativistic Nucleus-Nucleus Collisions (Quark Matter 2022), 6 pages, 3 figures
Más allá de la bioética
Creators: name: Espinosa Proa, Sergio
Publisher: name: FILHA
Year: 2023

description: El plano de los sujetos/objetos no es todavía el plano de inmanencia en donde lo real hace acto de presencia: sujetos y objetos son efectos, producto y resultado de una reducción y una eliminación incesantemente recomenzadas. Dicho en una sentencia: lo que en la relación técnica se elimina de los seres es su existencia. Ésta designa con precisión aquello que excede y disuelve a los sujetos y a los objetos, perturbando y, en el límite, borrando su horizonte de inteligibilidad e intervención. Con las categorías de bioética y biopolítica se plantea una exigencia a la que deberá responderse sin culpas y sin tardanza: abandonar el horizonte de una modernidad que se sostiene técnica y políticamente sobre la abstracción de lo humano, definible a partir de ahora como una existencia finita, deseante e intransferible. Tomarse en serio esta posibilidad significa despedirse del teatro de la representación.
description: FILHA, Vol. 17 Núm. 27 (2022): Vol. 17, No 27, julio-diciembre 2022
Analytic continuation and numerical evaluation of the kite integral and the equal mass sunrise integral
Creators: name: Bogner, Christian
name: Schweitzer, Armin
name: Weinzierl, Stefan
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study the analytic continuation of Feynman integrals from the kite family, expressed in terms of elliptic generalisations of (multiple) polylogarithms. Expressed in this way, the Feynman integrals are functions of two periods of an elliptic curve. We show that all what is required is just the analytic continuation of these two periods. We present an explicit formula for the two periods for all values of $t \in {\mathbb R}$. Furthermore, the nome $q$ of the elliptic curve satisfies over the complete range in $t$ the inequality $|q|\le 1$, where $|q|=1$ is attained only at the singular points $t\in\{m^2,9m^2,\infty\}$. This ensures the convergence of the $q$-series expansion of the $\mathrm{ELi}$-functions and provides a fast and efficient evaluation of these Feynman integrals.
description: 30 pages, version to be published
Jean-Marc Mandosio contra Michel Foucault (una exposición)
Creators: name: Epifanio Julián, Noé
Publisher: name: FILHA
Year: 2023

description: La lectura de dos libros sin relación aparente —un estudio sobre un poeta del Siglo de Oro español (Alonso Álvarez de Soria) y un texto contra Michel Foucault redactado por Jean-Marc Mandosio— nos impulsó a elaborar una exposición del segundo texto, resaltando, en un primer momento, la tradición editorial de silenciar a los pensadores críticos y, a continuación, la conversión de un investigador filosófico en bestseller. Dicho con otros términos: se describe la impostura de Michel Foucault y el desenmascaramiento realizado por Jean-Marc Mandosio.
description: FILHA, Vol. 18 Núm. 28 (2023): Vol. 18, No 28, enero-julio 2023
Gaussian-Based Quasiparticle Self-Consistent $GW$ for Periodic Systems
Creators: name: Lei, Jincheng
name: Zhu, Tianyu
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a quasiparticle self-consistent $GW$ (QSGW) implementation for periodic systems based on crystalline Gaussian basis sets. Our QSGW approach is based on a full-frequency analytic continuation GW scheme with Brillouin zone sampling and employs the Gaussian density fitting technique. We benchmark our QSGW implementation on a set of weakly-correlated semiconductors and insulators as well as strongly correlated transition metal oxides including MnO, FeO, CoO, and NiO. Band gap, band structure, and density of states are evaluated using finite size corrected QSGW. We find that although QSGW systematically overestimates band gaps of tested semiconductors and transition metal oxides, it completely removes the dependence on the choice of density functionals and provides more consistent prediction of spectral properties than $G_0W_0$ across a wide range of solids. This work paves the way for utilizing QSGW in ab initio quantum embedding for solids.
description: 7 pages, 4 figures, 2 tables
Comunicación del arte popular, el desafío del modelo virtual de la galería “casa grande” como museo “de sociedad"
Creators: name: Maldonado Cachón, Cinthia Elizabeth
name: Pesci Gaytán, Ernesto
Publisher: name: FILHA
Year: 2022

description: En este artículo se abordan los museos virtuales como herramientas de comunicación para la diseminación del conocimiento, los cuales son llamados a desempeñar un papel importante para las instituciones museísticas. El objetivo de esta investigación se enfoca en el análisis de la situación actual (2021) de los museos de Zacatecas en el entorno cibercultural y la pertinencia de la creación de un modelo de museo virtual y “de sociedad” para el arte popular, con parámetros de comunicación de alta calidad. El proyecto se enmarca en un tipo de investigación descriptiva con enfoque cualitativo. Siendo este estudio un campo de diseño interdisciplinario e integrado, la perspectiva se volvió macroscópica a través de la revisión de la literatura que se realizó con base en la matriz de coherencia epistemológica propuesta por Zepeda y Pesci (2018); el instrumento de medición fue una guía de observación. La propuesta de museo virtual y “de sociedad” para la galería de arte popular “Casa Grande” pretende visibilizar las cualidades y estrategias de comunicación necesarias para la creación de un modelo de museo para el entorno cibercultural, a partir de los parámetros de un museo “de sociedad” y un museo virtual, así como con los estándares de evaluación de Tim Berners-Lee, denominados Recomendaciones del W3C. Los desafíos que hoy encaran los museos seguirán adecuándose a las exigencias de la sociedad, por lo cual sus estrategias comunicológicas estarán dadas bajo un contexto social y tecnológico que facilite la conversión a genuinos museos para el contexto cibercultural que les envuelva.
description: FILHA, Vol. 17 Núm. 26 (2022): Vol. 17. Núm. 26. Enero-julio 2022
WIMPs during Reheating
Creators: name: Bernal, Nicolás
name: Xu, Yong
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Weakly Interacting Massive Particles (WIMPs) are among the best-motivated dark matter candidates. In the standard scenario where the freeze-out occurs well after the end of inflationary reheating, they are in tension with the severe experimental constraints. Here, we investigate the thermal freeze-out of WIMPs occurring {\it during} reheating, while the inflaton $ϕ$ coherently oscillates in a generic potential $\propto ϕ^n$. Depending on the value of $n$ and the spin of the inflaton decaying products, the evolution of the radiation and inflaton energy densities can show distinct features, therefore, having a considerable impact on the freeze-out behavior of WIMPs. As a result of the injection of entropy during reheating, the parameter space compatible with the observed DM relic abundance is enlarged. In particular, the WIMP thermally averaged annihilation cross-section can be several magnitudes lower than that in the standard case. Finally, we discuss the current bounds from dark matter indirect detection experiments, and explore future challenges and opportunities.
description: V1:19 pages, 5 figures; V2:discussion on preheating added, references updated, version accepted for publication in JCAP
Microscopic Study of ${}^1{S_0}$ Superfluidity in Dilute Neutron Matter
Creators: name: Pavlou, G. E.
name: Mavrommatis, E.
name: Moustakidis, Ch.
name: Clark, J. W.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Singlet $S$-wave superfluidity of dilute neutron matter is studied within the correlated BCS method, which takes into account both pairing and short-range correlations. First, the equation of state (EOS) of normal neutron matter is calculated within the Correlated Basis Function (CBF) method in lowest cluster order using the ${}^1{S_0}$ and ${}^3P$ components of the Argonne $V_{18}$ potential, assuming trial Jastrow-type correlation functions. The ${}^1{S_0}$ superfluid gap is then calculated with the corresponding component of the Argonne $V_{18}$ potential and the optimally determined correlation functions. The dependence of our results on the chosen forms for the correlation functions is studied, and the role of the $P$-wave channel is investigated. Where comparison is meaningful, the values obtained for the ${}^1{S_0}$ gap within this simplified scheme are consistent with the results of similar and more elaborate microscopic methods.
description: 9 pages, 6 figures
Gyrator operation using Josephson mixers
Creators: name: Abdo, Baleegh
name: Brink, Markus
name: Chow, Jerry M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Nonreciprocal microwave devices, such as circulators, are useful in routing quantum signals in quantum networks and protecting quantum systems against noise coming from the detection chain. However, commercial, cryogenic circulators, now in use, are unsuitable for scalable superconducting quantum architectures due to their appreciable size, loss, and inherent magnetic field. We report on the measurement of a key nonreciprocal element, i.e., the gyrator, which can be used to realize a circulator. Unlike state-of-the-art gyrators, which use a magneto-optic effect to induce a phase shift of $π$ between transmitted signals in opposite directions, our device uses the phase nonreciprocity of a Josephson-based three-wave-mixing device. By coupling two of these mixers and operating them in noiseless frequency-conversion mode, we show that the device acts as a nonreciprocal phase shifter whose phase shift is controlled by the phase difference of the microwave tones driving the mixers. Such a device could be used to realize a lossless, on-chip, superconducting circulator suitable for quantum-information-processing applications.
Symmetric configurations highlighted by collective quantum coherence
Creators: name: Obster, Dennis
name: Sasakura, Naoki
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Recent developments in quantum gravity have shown the Lorentzian treatment to be a fruitful approach towards the emergence of macroscopic spacetimes. In this paper, we discuss another related aspect of the Lorentzian treatment: we argue that collective quantum coherence may provide a simple mechanism for highlighting symmetric configurations over generic non-symmetric ones. After presenting the general framework of the mechanism, we show the phenomenon in some concrete simple examples in the randomly connected tensor network, which is tightly related to a certain model of quantum gravity, i.e., the canonical tensor model. We find large peaks at configurations invariant under Lie-group symmetries as well as a preference for charge quantization, even in the Abelian case. In future study, this simple mechanism may provide a way to analyze the emergence of macroscopic spacetimes with global symmetries as well as various other symmetries existing in nature, which are usually postulated.
description: 19 pages, 4 figures; Major changes in the summary section. Some other minor changes. Figures replaced. References added
The Obscured Fraction of Quasars at Cosmic Noon
Creators: name: Vijarnwannaluk, Bovornpratch
name: Akiyama, Masayuki
name: Schramm, Malte
name: Ueda, Yoshihiro
name: Matsuoka, Yoshiki
name: Toba, Yoshiki
name: Sawicki, Marcin
name: Gwyn, Stephen
name: Pflugradt, Janek
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Statistical studies of X-ray selected Active Galactic Nuclei (AGN) indicate that the fraction of obscured AGN increases with increasing redshift, and the results suggest that a significant part of the accretion growth occurs behind obscuring material in the early universe. We investigate the obscured fraction of highly accreting X-ray AGN at around the peak epoch of supermassive black hole growth utilizing the wide and deep X-ray and optical/IR imaging datasets. A unique sample of luminous X-ray selected AGNs above $z>2$ was constructed by matching the XMM-SERVS X-ray point-source catalog with a PSF-convolved photometric catalog covering from $u^*$ to 4.5$μ\mathrm{m}$ bands. Photometric redshift, hydrogen column density, and 2-10 keV AGN luminosity of the X-ray selected AGN candidates were estimated. Using the sample of 306 2-10 keV detected AGN at above redshift 2, we estimate the fraction of AGN with $\log N_{\rm H}\ (\rm cm^{-2})>22$, assuming parametric X-ray luminosity and absorption functions. The results suggest that $76_{-3}^{+4}\%$ of luminous quasars ($\log L_X\ (\rm erg\ s^{-1}) >44.5$) above redshift 2 are obscured. The fraction indicates an increased contribution of obscured accretion at high redshift than that in the local universe. We discuss the implications of the increasing obscured fraction with increasing redshift based on the AGN obscuration scenarios, which describe obscuration properties in the local universe. Both the obscured and unobscured $z>2$ AGN show a broad range of SEDs and morphology, which may reflect the broad variety of host galaxy properties and physical processes associated with the obscuration.
description: 25 Pages, 19 Figure, ApJ accepted. Updated version contains corrections based on comments from the community
Fricke Lie algebras and the genus zero property in Moonshine
Creators: name: Carnahan, Scott
Publisher: name: arXiv
Year: 2017
Subjects: subject: Representation Theory (math.RT)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11F22, 17B65

description: We give a new, simpler proof that the canonical actions of finite groups on Fricke-type Monstrous Lie algebras yield genus zero functions in Generalized Monstrous Moonshine, using a Borcherds-Kac-Moody Lie algebra decomposition due to Jurisich. We describe a compatibility condition, arising from the no-ghost theorem in bosonic string theory, that yields the genus zero property. We give evidence for and against the conjecture that such a compatibility for symmetries of the Monster Lie algebra gives a characterization of the Monster group.
description: 19 pages, final version