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Documentos disponibles de esta editorial (292)
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A new first integral for the equations corresponding to twisting type-N vacuum gravitational fields with two non-commuting Kilting vectors is introduced. A new reduction of the problem to a complex second-order ordinary differential equation is [...]![]()
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We present a method to sum Borel- and Gevrey-summable asymptotic series by matching the series to be summed with a linear combination of asymptotic series of known functions that themselves are scaled versions of a single, appropriate, but other[...]![]()
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Introducing a surface layer of matter on the edge of a neutron star in slow rigid rotation, we analyze, from an intrinsic point of view, the junction conditions that must be satisfied between the interior and exterior solutions of the Einstein e[...]![]()
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In this work we calculate the low-energy effective action for gravity with torsion, obtained after the integration of scalar and fermionic matter fields, using the local momentum representation based on the Riemann normal coordinates expansion. [...]![]()
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Alvarez Rodríguez, R. ; Fraile Prieto, Luis Mario ; López Herraiz, Joaquin ; Martinez Pérez, M. ; Moreno, O. ; Udías Moinelo, José Manuel | IOP publishing ltd | 2016The nucleosynthesis of elements beyond iron is dominated by neutron captures in the s and r processes. However, 32 stable, proton-rich isotopes cannot be formed during those processes, because they are shielded from the s-process flow and r-proc[...]![]()
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Ivanov, M. V. ; Antonov, A. N. ; Megías, G. D. ; González-Jiménez, R. ; Bárbaro, M. B. ; Caballero, J. A. ; Donnelly, T. W. ; Udías Moinelo, José Manuel | IOP publishing ltd | 2018We compare the characteristics of the charged-current quasielastic (anti)neutrino scattering obtained in two different nuclear models, the phenomenological SuperScaling Approximation and the model using a realistic spectral function S(p, epsilon[...]![]()
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González Adalid Pemartín, Isidoro ; Martín Mayor, Víctor ; Parisi, G. ; Ruiz Lorenzo, J.J. | IOP publishing ltd | 2019-03-29We study the problem of glassy relaxations in the presence of an external field in the highly controlled context of a spin-glass simulation. We consider a small spin glass in three dimensions (specifically, a lattice of size L = 8, small enough [...]![]()
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Duncan, Kenneth ; Conselice, Christopher J. ; Mundy, Carl ; Bell, Eric ; Donley, Jennifer ; Galametz, Audrey ; Guo, Yicheng ; Grogin, Norman A. ; Hathi, Nimish ; Kartaltepe, Jeyhan ; Kocevski, Dale ; Koekemoer, Anton M. ; Pérez González, Pablo Guillermo ; Mantha, Kameswara B. ; Snyder, Gregory F. ; Stefanon, Mauro | IOP publishing ltd | 2019-05-08Galaxy mergers are expected to have a significant role in the mass assembly of galaxies in the early universe, but there are very few observational constraints on the merger history of galaxies at z > 2. We present the first study of galaxy maj[...]![]()
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Ivy, Diane J. ; Solomon, Susan ; Calvo Fernández, Natalia ; Thompson, David W. J. | IOP publishing ltd | 2017-02We present observational evidence for linkages between extreme Arctic stratospheric ozone anomalies in March and Northern Hemisphere tropospheric climate in spring (March-April). Springs characterized by low Arctic ozone anomalies in March are a[...]![]()
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We examine a case study where classical evolution emerges when observing a quantum evolution. By using a single-mode quantum Kerr evolution interrupted by measurement of the double-homodyne kind (projecting the evolved field state into classical[...]![]()
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Finkel Morgenstern, Federico ; González López, Artemio ; Rodríguez González, Miguel Ángel | IOP publishing ltd | 1999-10-01We show that there are two different families of (weakly) orthogonal polynomials associated to the quasi-exactly solvable Razavy potential V_ (x) = (? cosh 2x?M)^ 2 (? > 0, M ? N). One of these families encompasses the four sets of orthogonal p[...]![]()
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Albareti, F. D. ; Ruiz Cembranos, José Alberto ; Cruz Dombriz, Álvaro de la ; Dobado González, Antonio | IOP publishing ltd | 2013-07Raychaudhuri equation is found provided that particular energy conditions are assumed and regardless the considered solution of the Einstein's equations. This fact is usually interpreted as a manifestation of the attractive character of gravity.[...]![]()
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We have derived the uncertainties to be expected in the derivation of galaxy physical properties (star formation history, age, metallicity, and reddening) when comparing broadband photometry to the predictions of evolutionary synthesis models. W[...]![]()
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The effect of the radiation reaction on the motion of an extended classical charged particle in a magnetic field is investigated. The expression of the self-torque is obtained and it is shown that there are radiationless self-sustained oscillati[...]![]()
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A comprehensive stratosphere-resolving atmospheric model, with interactive stratospheric ozone chemistry, coupled to ocean, sea ice and land components is used to explore the tropospheric and surface impacts of large springtime ozone anomalies i[...]![]()
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We investigate the galaxy quenching process at intermediate redshift using a sample of similar to 4400 galaxies with M-* > 10(9) M-circle dot between redshift 0.5 and 1.0 in all five CANDELS fields. We divide this sample, using the integrated sp[...]![]()
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Piqueras de Noriega, Javier ; Vila Santos, María ; Díaz-Guerra Viejo, Carlos | IOP publishing ltd | 2010-04-07CuO nanostructures with different morphologies, such as single-crystal nanowires, nanoribbons and nanorods, have been grown by thermal oxidation of copper in the 380–900?°C temperature range. Cathodoluminescence spectra of the nanostructures sho[...]![]()
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Thin films of hafnium oxide ( HfO2) have been grown by high pressure reactive sputtering on transparent quartz substrates ( UV- grade silica) and silicon wafers. Deposition conditions were adjusted to obtain polycrystalline as well as amorphous [...]![]()
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Alcalde Pampliega, Belén ; Pérez González, Pablo Guillermo ; Barro, Guillermo ; Domínguez Sánchez, Helena ; Eliche Moral, M. Carmen ; Cardiel López, Nicolás ; Hernán Caballero, Antonio ; Rodríguez Muñoz, Lucía ; Sánchez Blázquez, Patricia ; Esquej, Pilar | IOP publishing ltd | 2019-05-10We present a sample of 33 Balmer break galaxies (BBGs) selected as Hubble Space Telescope/F160W dropouts in the deepest CANDELS/GOODS fields (H > /~ 27.3 mag) but relatively bright in Spitzer/IRAC ([3.6], [4.5]![]()
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Antoranz Canales, Pedro ; Bonnefoy, Simon Francois Albert ; Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Miranda Pantoja, José Miguel ; Satalecka, Konstanzja ; Scapin, Valeria | IOP publishing ltd | 2014-02We present the results of stereoscopic observations of the satellite galaxy Segue 1 with the MAGIC Telescopes, carried out between 2011 and 2013. With almost 160 hours of good-quality data, this is the deepest observational campaign on any dwarf[...]![]()
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Sols Lucía, Fernando ; Heimsoth, M. ; Creffield, Charles E. ; Carr, L.D. | IOP publishing ltd | 2012-07-26In a system of ac-driven condensed bosons we study a new type of Josephson effect occurring between states sharing the same region of space and the same internal atom structure. We first develop a technique to calculate the long-time dynamics of[...]![]()
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Fernández Pérez, Luis Antonio ; Marinari, E. ; Martín Mayor, Víctor ; Parisi, G. ; Ruiz Lorenzo, J.J. | IOP publishing ltd | 2018-10We consider the spatial correlation function of the two-dimensional Ising spin glass under out-equilibrium conditions. We pay special attention to the scaling limit reached upon approaching zero temperature. The field-theory of a non-interacting[...]![]()
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Parafermions of orders 2 and 3 are shown to be the fundamental tool to construct superspaces related to cubic and quartic extensions of the Poincaré algebra. The corresponding superfields are constructed, and some of their main properties are an[...]![]()
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Parafermions of orders 2 and 3 are shown to be the fundamental tool to construct superspaces related to cubic and quartic extensions of the Poincaré algebra. The corresponding superfields are constructed, and some of their main properties are an[...]![]()
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We give an exposition of the 1972 parametrization method of Kuchar in the context of the multisymplectic approach to field theory. The purpose of the formalism developed here is to make any classical field theory, containing a metric as a sole b[...]![]()
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We consider the problem of parametrizing modified gravity theories that include an additional vector field in the sub-Hubble regime within the quasi-static approximation. We start from the most general set of second order equations for metric an[...]![]()
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We present an implementation of the method of orthogonal polynomials which is particularly suitable to study the partition functions of Penner random matrix models, to obtain their explicit forms in the exactly solvable cases, and to determine [...]![]()
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Barrio Uña, Juan Abel ; Contreras González, José Luis ; Domínguez Díaz, Alberto ; Carreto Fidalgo, David Friedrich ; Fonseca González, Victoria ; Hoang, Kim Dinh ; López Moya, Marcos ; Nievas Rosillo, Mireia ; Peñil del Campo, Pablo ; Saha, Lab | IOP publishing ltd | 2018-11-01We report on observations of the pulsar/Be star binary system PSR J2032+4127/MT91 213 in the energy range between 100 GeV and 20 TeV with the Very Energetic Radiation Imaging Telescope Array and Major Atmospheric Gamma Imaging Cherenkov telescop[...]![]()
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Relaño Pérez, Armando ; Molina, R. A. ; Retamosa Granado, Joaquín ; Muñoz, L. ; Faleiro, E. ; Gómez Gómez, José María | IOP publishing ltd | 2010The power spectrum of the ?_(n) statistic of quantum spectra presents 1/ƒ^(?) noise. For chaotic systems ? = 1 while for regular systems ? = 2. Although the transition from regularity to chaos is non universal, for a wide variety of systems wi[...]![]()
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López Maroto, Antonio ; Beltrán Jiménez, José ; Koivisto, Tomi S. ; Fonseca Mota, David | IOP publishing ltd | 2009-10It has been recently proposed that the presence of a temporal electromagnetic field on cosmological scales could explain the phase of accelerated expansion that the universe is currently undergoing. The field contributes as a cosmological consta[...]![]()
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Álvarez Galindo, Gabriel ; Martínez Alonso, Luis ; Medina Reus, Elena | IOP publishing ltd | 2017-03-24The partition function of the Penner matrix model for both positive and negative values of the coupling constant can be explicitly written in terms of the Barnes G function. In this paper we show that for negative values of the coupling constant[...]![]()
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Giza, Olivia M. ; Sánchez Parcerisa, Daniel ; Sánchez-Tembleque Verbo, Victor ; López Herraiz, Joaquin ; Camacho, Jorge ; Avery, Stephen ; Udías Moinelo, José Manuel | IOP publishing ltd | 2019-04This work describes all stages of development (setup, optimization, performance, and first experimental measurements) of an acoustic sensor that can be used for range monitoring and dosimetry of clinical radiotherapy beams. The detection device [...]![]()
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Santos Santos, Isabel ; Domínguez Tenreiro, Rosa ; Artal, Héctor ; Pedrosa, Susana E. ; Bignone, Lucas ; Martínez Serrano, Francisco ; Gómez Flechoso, María de los Ángeles ; Tissera, Patricia B. ; Serna, Arturo | IOP publishing ltd | 2020-07We address the “plane of satellites problem” by studying planar configurations around two disk galaxies with no late major mergers, formed in zoom-in hydro-simulations. Due to the current lack of good-quality kinematic data for M31 satellites, w[...]![]()
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Monaico, E. ; Ursaki, V. V. ; Urbieta Quiroga, Ana Irene ; Fernández Sánchez, Paloma ; Piqueras de Noriega, Javier ; Boyd, R. W. ; Tiginyanu, I. M. | IOP publishing ltd | 2004-12Porous CdSe layers have been produced by anodic etching of crystalline substrates in a HCl solution. Anodization under in situ. UV illumination resulted in the formation of uniformly distributed parallel pores with a diameter of 30 nm, stretchin[...]![]()
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Dobado González, Antonio ; Guo, Feng-Kuo ; Llanes Estrada, Felipe José | IOP publishing ltd | 2015-12-01We are exploring a generic strongly-interacting Electroweak Symmetry Breaking Sector (EWSBS) with the low-energy effective field theory for the four experimentally known particles (W_L^±, Z_L, h) and its dispersion-relation based unitary extensi[...]![]()
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Dobado González, Antonio ; Guo, Feng-Kuo ; Llanes Estrada, Felipe José | IOP publishing ltd | 2015-12-01We are exploring a generic strongly-interacting Electroweak Symmetry Breaking Sector (EWSBS) with the low-energy effectie field theory for the four experimentally known particles (W^(±)_(L), Z_(L), h) and its dispersion-relation based unitary ex[...]![]()
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Moreno Casares, Pablo Antonio ; Martín-Delgado Alcántara, Miguel Ángel | IOP publishing ltd | 2020-07Adversarial attacks represent a serious menace for learning algorithms and may compromise the security of future autonomous systems. A theorem by Khoury and Hadfield-Menell (KH), provides sufficient conditions to guarantee the robustness of acti[...]![]()
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Bayat, Abolfazl ; Creffield, Charles E. ; Jefferson, John H ; Pepper, Michael ; Bose, Sougato | IOP publishing ltd | 2015-10We show how single quantum dots, each hosting a singlet-triplet qubit, can be placed in arrays to build a spin quantum cellular automaton. A fast (? 10 ns) deterministic coherent singlet- triplet filtering, as opposed to current incoherent tunne[...]![]()
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Dauphinais, Guillaume ; Ortiz Martín, Laura ; Varona Angulo, Santiago ; Martín Delgado, Miguel Ángel | IOP publishing ltd | 2019-05-29We present a full quantum error correcting procedure with the semion code: an off-shell extension of the double-semion model. We construct open-string operators that recover the quantum memory from arbitrary errors and closed-string operators th[...]![]()
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Martin- Benito, M. ; Garay Elizondo, Luis Javier ; Mena Marugán, Guillermo A. | IOP publishing ltd | 2011The linearly polarized Gowdy T(3) model can be regarded as compact Bianchi I cosmologies with inhomogeneous modes allowed to travel in one direction. We study a hybrid quantization of this model that combines the loop quantization of the Bianchi[...]![]()
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We introduce a new quantum optimization algorithm for dense linear programming problems, which can be seen as the quantization of the interior point predictor-corrector algorithm [1] using a quantum linear system algorithm [2]. The (worst case) [...]![]()
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Finkel Morgenstern, Federico ; González López, Artemio ; Rodríguez González, Miguel Ángel | IOP publishing ltd | 1997-10-07In this paper, we study Lie superalgebras of 2 x 2 matrix-valued first-order differential operators on the complex line. We first completely classify all such superalgebras of finite dimension. Among the finite-dimensional superalgebras whose od[...]![]()
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We prove that every rational extension of the quantum harmonic oscillator that is exactly solvable by polynomials is monodromy free, and therefore can be obtained by applying a finite number of state-deleting Darboux transformations on the harmo[...]![]()
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Relaño Pérez, Armando ; Gómez Gómez, José María ; Faleiro, E. ; Muñoz, L. ; Molina, R. A. ; Retamosa Granado, J. | IOP publishing ltd | 2011A survey of chaotic dynamics in atomic nuclei is presented, using on the one hand standard statistics of quantum chaos studies, and on the other a new approach based on time series analysis methods. The study of shell-model spectra in the pf she[...]![]()
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A versatile and reconfigurable ASIC is presented, which implements two different con-cepts of low level trigger (L0) for Cherenkov telescopes: the Majority trigger (sum of discriminated inputs) and the Sum trigger concept (analogue clipped sum o[...]![]()
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Weinfurtner, Silke ; De las Cuevas, Gemma ; Martín-Delgado Alcántara, Miguel Ángel ; Briegel, Hans J. | IOP publishing ltd | 2014-03-07We present a new description of discrete space-time in 1+1 dimensions in terms of a set of elementary geometrical units that represent its independent classical degrees of freedom. This is achieved by means of a binary encoding that is ergodic i[...]![]()
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Roy, C.L. ; Méndez Martín, Bianchi ; Domínguez-Adame Acosta, Francisco | IOP publishing ltd | 1994-05-21A relativistic equation is derived for a slowly varying potential by suitably approximating the one-dimensional Dirac equation. This equation is shown to be akin to the Schrodinger equation with an effective potential and effective eigenvalues. [...]![]()
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Gómez Gutiérrez, Alicia ; González Herrera, Elvira María ; Vicent López, José Luis ; Cebollada Barata, Federico A. ; Palomares Simón, Francisco Javier ; Sánchez Agudo, Marta ; Urdiroz Urricelqui, Unai | IOP publishing ltd | 2019-02-27With the aim of achieving stable, substantial remanences adequate for exploitation in stray field-based applications, we report on the hysteresis behavior occurring in arrays of single-crystal Fe motifs, a-beam lithographed into prisms with tria[...]![]()
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We study double-barrier interfaces separating regions of asymptotically subsonic and supersonic flow of Bose condensed atoms. These setups contain at least one black hole sonic horizon from which the analogue of Hawking radiation should be gener[...]![]()
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Olea Ariza, Javier ; López, E. ; Antolín, E. ; Martí, A. ; Luque, A. ; García Hemme, Eric ; Pastor, D. ; García Hernansanz, Rodrigo ; Prado Millán, Álvaro del ; González Díaz, Germán | IOP publishing ltd | 2016-02-10Silicon samples were implanted with high Ti doses and subsequently processed with the pulsed-laser melting technique. The electronic transport properties in the 15–300?K range and the room temperature spectral photoresponse at energies over the [...]