Results for "J. Solà-morales"

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Nonsingular Decaying Vacuum Cosmology and Entropy ProductionDec 16 2014Mar 08 2015The thermodynamic behavior of a decaying vacuum cosmology describing the entire cosmological history evolving between two extreme (early and late time) de Sitter eras is investigated. The thermal evolution from the early de Sitter to the radiation phase ... More
Fundamental Constants in Physics and Their Time VariationJul 08 2015Jul 12 2015There is no doubt that the field of Fundamental Constants in Physics and Their Time Variation is one of the hottest subjects in modern theoretical and experimental physics, with potential implications in all fundamental areas of physics research, such ... More
Optimal scalar products in the Standard Linear Viscoelastic ModelFeb 24 2015We study the third order in time linear dissipative wave equation known as the Standard Linear Viscoelastic Model, that appears also as the linearization of the so-called Moore-Gibson-Thompson equation in Nonlinear Acoustics. We complete the description ... More
Quaternion kinematics for the error-state Kalman filterNov 03 2017This article is an exhaustive revision of concepts and formulas related to quaternions and rotations in 3D space, and their proper use in estimation engines such as the error-state Kalman filter. The paper includes an in-depth study of the rotation group ... More
The Neutrinoless Double Beta Decay: The Case for Germanium DetectorsNov 21 2002An overview of the current status of Neutrinoless Double Beta Decay is presented, emphasizing on the case of Germanium Detectors.
An example on Lyapunov stability and linearizationFeb 06 2019The purpose of this paper is to present an example of a C1 (in the Fr\'echet sense) discrete dynamical system in a infinite-dimensional separable Hilbert space for which the origin is an exponentially asymptotically stable fixed point, but such that its ... More
Physical vacuum as the source of the standard model particle massesMay 14 2008Sep 05 2011We present an approach of mass generation for Standard Model particles in which fermions acquire masses from their interactions with physical vacuum and gauge bosons acquire masses from charge fluctuations of vacuum. A remarkable fact of this approach ... More
Pion Mass Effects in the Large $N$ Limit of $\chiPT$Jul 18 1994We compute the large $N$ effective action of the $O(N+1)/O(N)$ non-linear sigma model including the effect of the pion mass to order $m^2_{\pi}/f_{\pi}^2$. This action is more complex than the one corresponding to the chiral limit not only because of ... More
Stability problems in non autonomous linear differential equations in infinite dimensionsJun 11 2019One goal of this paper is to study robustness of stability of nonautonomous linear ordinary differential equations under integrally small perturbations in an infinite dimensional Banach space. Some applications are obtained to the case of rapid oscillatory ... More
Effective model for particle mass generationFeb 14 2007May 13 2008We present an effective model for particle mass generation in which we extract generic features of the Higgs mechanism that do not depend on its interpretation in terms of a Higgs field. In this model the physical vacuum is assumed as a medium at zero ... More
Higher spin holography for SYM in d dimensionsNov 26 2004We derive the spectrum of gauge invariant operators for maximally supersymmetric Yang-Mills theories in d dimensions. After subtracting the tower of BPS multiplets, states are shown to fall into long multiplets of a hidden SO(10,2) symmetry dressed by ... More
About the Cauchy problem in Stelle's quadratic gravityNov 19 2018Feb 22 2019The focus of the present work is on the Cauchy problem for the quadratic gravity models introduced in \cite{stelle}-\cite{stelle2}. These are renormalizable higher order derivative models of gravity, but at cost of ghostly states propagating in the phase ... More
The existence of smooth solutions in q-theoriesAug 23 2018Oct 12 2018The q-models are scenarios that may explain the smallness of the cosmological constant [1]-[7]. The vacuum in these theories is presented as a self-sustainable medium and include a new degree of freedom, the q-variable, which stablish the equilibrium ... More
Order of the chiral phase transtion in the sigma modelsJan 31 2006Feb 03 2006The chiral phase transition at a certain critical temperature is a restoration mechanism of the chiral symmetry, broken by the nonzero mass of quarks and mesons. The transition can be studied through several models, among which are the sigma models. An ... More
Probing Fuzzballs with Particles, Waves and StringsNov 28 2017Feb 24 2018We probe D1D5 micro-state geometries with massless particles, waves and strings. To this end, we study geodetic motion, Klein-Gordon equation and string scattering in the resulting gravitational background. Due to the reduced rotational symmetry, even ... More
The effect of activity on stellar temperatures and radiiNov 22 2007Recent analyses of low-mass eclipsing binary stars have unveiled a significant disagreement between the observations and the predictions of stellar structure models. Results show that theoretical models underestimate the radii and overestimate the effective ... More
The electroweak chiral Lagrangian as an effective field theory of the standard model with a heavy HiggsDec 19 1994Using effective field theory methods, we integrate out the standard model Higgs boson to one loop and represent its non-decoupling effects by a set of gauge invariant effective operators of the electroweak chiral Lagrangian. We briefly discuss the relation ... More
The electroweak chiral parameters for a heavy Higgs in the Standard ModelAug 08 1994Aug 08 1994We study the electroweak interactions within the standard electroweak theory in the case where the Higgs particle is heavy, namely, $M_H \leq 1\;TeV$. By integrating out the Higgs boson to one loop we find the complete effective lagrangian, called electroweak ... More
Higgs Physics in the Large N limitJul 18 1996In this paper we study the large N limit of the Standard Model Higgs sector with $N\lambda$, $Ng^2$ and $Ng'^2$ constant and $N$ being the number of would-be Goldstone bosons. Despite the simplicity of this method at leading order, its results satisfy ... More
Some aspects about semiclassical electrodynamics and gauge transformationsSep 30 2005May 20 2007We describe the behaviour of semiclassical electrodynamics under gauge transformations. For this purpose we observe the structure of Schr\"odinger equation and matricial elements under these transformations. We conclude this theory is not gauge invariant. ... More
Background reduction and sensitivity for germanium double beta decay experimentsAug 29 2007Germanium detectors have very good capabilities for the investigation of rare phenomena like the neutrinoless double beta decay. Rejection of the background entangling the expected signal is one primary goal in this kind of experiments. Here, the attainable ... More
Instability and bifurcation in a trend depending price formation modelJun 05 2013A well-known model due to J.-M. Lasry and P.L. Lions that presents the evolution of prices in a market as the evolution of a free boundary in a diffusion equation is suggested to be modified in order to show instabilities for some values of the parameters. ... More
Higgs triplet effects in purely leptonic processesNov 11 1995We consider the effect of complex Higgs triplets on purely leptonic processes and survey the experimental constraints on the mass and couplings of their single and double charge members. Present day experiments tolerate values of the Yukawa couplings ... More
Curves and surfaces with constant nonlocal mean curvature: meeting Alexandrov and DelaunayMar 02 2015We are concerned with hypersurfaces of $\mathbb{R}^N$ with constant nonlocal (or fractional) mean curvature. This is the equation associated to critical points of the fractional perimeter under a volume constraint. Our results are twofold. First we prove ... More
Counting matrices over finite fields with support on skew Young diagrams and complements of Rothe diagramsMar 26 2012Feb 25 2013We consider the problem of finding the number of matrices over a finite field with a certain rank and with support that avoids a subset of the entries. These matrices are a q-analogue of permutations with restricted positions (i.e., rook placements). ... More
On the perturbative corrections around D-string instantonsFeb 26 1999We study ${\cal F}^4$-threshold corrections in an eight dimensional S-dual pair of string theories, as a prototype of dual string vacua with sixteen supercharges. We show that the orbifold CFT description of D-string instantons gives rise to a perturbative ... More
Bound States of Type I D-StringsJan 19 1998We study the infra-red limit of the O(N) gauge theory that describes the low energy modes of a system of $N$ type I D-strings and provide some support to the conjecture that, in this limit, the theory flows to an orbifold conformal theory. We compute ... More
N=1 Superpotentials from Multi-Instanton CalculusOct 20 2005Nov 25 2005In this paper we compute gaugino and scalar condensates in N=1 supersymmetric gauge theories with and without massive adjoint matter, using localization formulae over the multi--instanton moduli space. Furthermore we compute the chiral ring relations ... More
A note on supersymmetric D-brane dynamicsSep 08 1997Nov 10 1997We study the spin dependence of D-brane dynamics in the Green-Schwarz formalism of boundary states. In particular we show how to interpret insertion of supercharges on the boundary state as sources of non-universal spin effects in D-brane potentials. ... More
Homoclinic orbits and entropy for three-dimensional flowsSep 25 2015We prove that every $C^1$ three-dimensional flow with positive topological entropy can be $C^1$ approximated by flows with homoclinic orbits. This extends a previous result for $C^1$ surface diffeomorphisms \cite{g}.
A big data based method for pass rates optimization in mathematics university lower division coursesSep 18 2018In this paper an algorithm designed for large databases is introduced for the enhancement of pass rates in mathematical university lower division courses with several sections. Using integer programming techniques, the algorithm finds the optimal pairing ... More
Gauss-Bonnet models with cosmological constant and non zero spatial curvature in $D=4$Nov 26 2017Jan 06 2018In the present paper the possibility of eternal universes in Gauss-Bonnet theories of gravity in four dimensions is analysed. It is shown that, for zero spatial curvature and zero cosmological constant, if the coupling is such that $0<f'(\phi)\leq c \exp(\frac{\sqrt{8}}{\sqrt{10}}\phi)$, ... More
Energy operator for non-relativistic and relativistic quantum mechanics revisitedAug 07 2012Aug 12 2012Hamiltonian operators are gauge dependent. For overcome this difficulty we reexamined the effect of a gauge transformation on Schr\"odinger and Dirac equations. We show that the gauge invariance of the operator $H-i\hbar\frac{\partial}{\partial t}$ provides ... More
Gauge theories on Omega-backgrounds from non commutative Seiberg-Witten curvesMar 23 2011May 05 2011We study the dynamics of a N=2 supersymmetric SU(N) gauge theory with fundamental or adjoint matter in presence of a non trivial Omega-background along a two dimensional plane. The prepotential and chiral correlators of the gauge theory can be obtained, ... More
Absolute dimensions of the G7+K7 eclipsing binary star IM Virginis: Discrepancies with stellar evolution modelsOct 23 2009We report extensive spectroscopic and differential photometric BVRI observations of the active, detached, 1.309-day double-lined eclipsing binary IM Vir, composed of a G7-type primary and a K7 secondary. With these observations we derive accurate absolute ... More
Chaining spins from (super)Yang--MillsAug 12 2004Aug 23 2004We review the spin bit model describing anomalous dimensions of the operators of Super Yang--Mills theory. We concentrate here on the scalar sector. In the limit of large $N$ this model coincides with integrable spin chain while at finite N it has nontrivial ... More
Spin bit models from non-planar N=4 SYMApr 08 2004Jul 13 2004We study spin models underlying the non-planar dynamics of ${\cal N}=4$ SYM gauge theory. In particular, we derive the non-local spin chain Hamiltonian generating dilatations in the gauge theory at leading order in $g_{\rm YM}^2 N$ but exact in ${1\over ... More
Constraining GRBs pseudo-redshift using different empirical correlationsSep 02 2019The determination of distances is highly constrained to a small number of Gamma-Ray Bursts (GRBs) because it requires observations at different wavelengths. Some empirical functions to estimate redshifts have been identified using populations of GRBs ... More
General Relativistic Radiation Magnetohydrodynamic Simulations of Thin Magnetically Arrested DisksJun 27 2017Jul 31 2018The classical, relativistic thin-disk theory of Novikov and Thorne (NT) predicts a maximum accretion efficiency of 40% for an optically thick, radiatively efficient accretion disk around a maximally spinning black hole (BH). However, when a strong magnetic ... More
Unitarization effects in EFT predictions of WZ scattering at the LHCJul 15 2019Effective field theories are an incredibly powerful tool in order to study and understand the true nature of the symmetry breaking sector dynamics of the Standard Model. However, they can suffer from some theoretical problems such as that of unitarity ... More
Solutions of Laplace's equation with simple boundary conditions, and their applications for capacitors with multiple symmetriesMar 29 2015We find solutions of Laplace's equation with specific boundary conditions (in which such solutions take either the value zero or unity in each surface) using a generic curvilinear system of coordinates. Such purely geometrical solutions (that we shall ... More
The lateral distribution function of cosmic-ray induced air showers studied with the HAWC observatoryAug 21 2019The particle lateral distribution function (LDF) of air showers at a given altitude is sensitive to the mass composition and primary energy of cosmic rays. Studies of the LDF are difficult to perform due to experimental effects such as sampling bias, ... More
A new family of transportation costs with applications to reaction-diffusion and parabolic equations with boundary conditionsApr 02 2016This paper introduces a family of transportation costs between non-negative measures. This family is used to obtain parabolic and reaction-diffusion equations with drift, subject to Dirichlet boundary condition, as the gradient flow of the entropy functional ... More
On the Bivariate Nakagami-$m$ Cumulative Distribution Function: Closed-form Expression and ApplicationsJun 18 2012In this paper, we derive exact closed-form expressions for the bivariate Nakagami-$m$ cumulative distribution function (CDF) with positive integer fading severity index $m$ in terms of a class of hypergeometric functions. Particularly, we show that the ... More
Lepton Flavor Changing Higgs decays in the Littlest Higgs Model with T-parityMay 24 2017Jan 21 2019We calculate loop induced lepton flavor violating Higgs decays in the Littlest Higgs model with T-parity. We find that a finite amplitude is obtained only when all contributions from the T-odd lepton sector are included. This is in contrast to lepton ... More
Using Wavelets to reject background in Dark Matter experimentsFeb 16 2003A method based on wavelet techniques has been developed and applied to background rejection in the data of the IGEX dark matter experiment. The method is presented and described in some detail to show how it efficiently rejects events coming from noise ... More
$p-$Ferrer diagram, $p-$linear ideals and arithmetical rankNov 20 2008In this paper we introduce $p-$Ferrer diagram, note that $1-$ Ferrer diagram are the usual Ferrer diagrams or Ferrer board, and corresponds to planar partitions. To any $p-$Ferrer diagram we associate a $p-$Ferrer ideal. We prove that $p-$Ferrer ideal ... More
Differential Galois Theory and non-Integrability of Planar Polynomial Vector FieldsJul 14 2017We study a necessary condition for the integrability of the polynomials fields in the plane by means of the differential Galois theory. More concretely, by means of the variational equations around a particular solution it is obtained a necessary condition ... More
Quantum Monte Carlo Calculations of Neutron MatterFeb 17 2003Uniform neutron matter is approximated by a cubic box containing a finite number of neutrons, with periodic boundary conditions. We report variational and Green's function Monte Carlo calculations of the ground state of fourteen neutrons in a periodic ... More
Spin dependent D-brane interactions and scattering amplitudes in matrix theoryDec 04 1998Spin interactions beteween two moving Dp-branes are analyzed using the Green-Schwarz formalism of boundary states. This approach turns out to be extremely efficient to compute all the spin effects related by supersymmetry to the leading v^4/r^7-p term. ... More
A viable Starobinsky-like inflationary scenario in the light of Planck and BICEP2 resultsJun 09 2014The recent CMB data from Planck and BICEP2 observations have opened a new window for inflationary cosmology. In this Essay we compare three Starobinsky-like inflationary scenarios: (i) the original Starobinsky proposal; (ii) a family of dynamically broken ... More
Fundamental properties of low-mass starsNov 28 2007Numerous investigations on the fundamental properties of low-mass stars using eclipsing binaries indicate a strong discrepancy between theory and observations that is still awaiting explanation. Current models seem to predict radii for stars less massive ... More
Continuous Time Random Walks and South Spain Seismic SeriesMay 27 2002Levy flights were introduced through the mathematical research of the algebra or random variables with infinite moments. Mandelbrot recognized that the Levy flight prescription had a deep connection to scale-invariant fractal random walk trajectories. ... More
The effect of magnetic activity on low-mass stars in eclipsing binariesMay 31 2010In recent years, analyses of eclipsing binary systems have unveiled differences between the observed fundamental properties of low-mass stars and those predicted by stellar structure models. Particularly, radius and effective temperatures computed from ... More
Deflection of Molecules by a Homogeneous Electric Field: A New EffectJun 19 2001Jun 26 2001In this work, we put forward a theoretical explanation of a peculiar effect found very recently (A. Gonzalez Urena et al., Chem. Phys. Lett. 341 (2001) 495). They have observed the deflection of a beam of molecules posessing a permanent electric dipole ... More
Simplicial ideals, 2-linear ideals and arithmetical rankFeb 22 2007In the first part of this paper we study scrollers and linearly joined varieties. A particular class of varieties, of important interest in classical Geometry are Cohen--Macaulay varieties of minimal degree. They appear naturally studying the fiber cone ... More
Segre embeddings, Hilbert series and Newcomb's problemJun 28 2013Jan 16 2014Monomial ideals and toric rings are closely related. By consider a Grobner basis we can always associated to any ideal $I$ in a polynomial ring a monomial ideal ${\rm in}_\prec I$, in some special situations the monomial ideal ${\rm in}_\prec I$ is square ... More
The Nash problem on arcs for surface singularitiesSep 22 2006Let $(X,O)$ be a germ of a normal surface singularity, $\pi : \tilde X\longrightarrow X$ be the minimal resolution of singularities and let $A=(a_{i,j})$ be the $n\times n$ symmetrical intersection matrix of the exceptional set of $\tilde X$. In an old ... More
Search strategies for pair production of heavy Higgs bosons decaying invisibly at the LHCOct 19 2017Mar 07 2018The search for heavy Higgs bosons at the LHC represents an intense experimental program, carried out by the ATLAS and CMS collaborations, which includes the hunt for invisible Higgs decays and dark matter candidates. No significant deviations from the ... More
Thermodynamical aspects of running vacuum modelsSep 01 2015Apr 28 2016The thermal history of a large class of running vacuum models in which the effective cosmological term is described by a truncated power series of the Hubble rate, whose dominant term is $\Lambda (H) \propto H^{n+2}$, is discussed in detail. Specifically, ... More
Towards a Predictive First-Principles Description of Solid Molecular Hydrogen with Density-Functional TheoryMar 26 2013We examine the influence of the main approximations employed in density-functional theory descriptions of the solid phase of molecular hydrogen near dissociation. We consider the importance of nuclear quantum effects on equilibrium properties and find ... More
Linear maps between C*-algebras preserving extreme points and strongly linear preserversJul 21 2015We study new classes of linear preservers between C$^*$-algebras and JB$^*$-triples. Let $E$ and $F$ be JB$^*$-triples with $\partial_{e} (E_1)$. We prove that every linear map $T:E\to F$ strongly preserving Brown-Pedersen quasi-invertible elements is ... More
Non-perturbative gauge/gravity correspondence in N=2 theoriesJun 18 2012We derive the exact supergravity profile for the twisted scalar field emitted by a system of fractional D3 branes at a Z2 orbifold singularity supporting N=2 quiver gauge theories with unitary groups and bifundamental matter. At the perturbative level ... More
AdS/CFT correspondence and D1/D5 systems in theories with 16 superchargesFeb 08 2001We discuss spectra of $AdS_3$ supergravities, arising in the near horizon geometry of D1/D5 systems in orbifolds/orientifolds of type IIB theory with 16 supercharges. These include models studied in a recent paper (hep-th/0012118), where the group action ... More
Primary and secondary eclipse spectroscopy with JWST: exploring the exoplanet parameter spaceJul 30 2010Eclipse exoplanet spectroscopy has yielded detection of H_2O, CH_4, CO_2 and CO in the atmosphere of hot jupiters and neptunes. About 40 large terrestrial planets are announced or confirmed, two of which are transiting, and another deemed habitable. Hence ... More
Two-point Correlators in N=2 Gauge TheoriesMay 08 2017We consider two-point correlators in SU(N) gauge theories on R4 with N=2 supersymmetry and Nf massless hypermultiplets in the fundamental representation. Using localization on S4, we compute the leading perturbative corrections to the two-point functions ... More
Short timescale variability in the Faint Sky Variability SurveyJul 10 2006We present the V band variability analysis of the point sources in the Faint Sky Variability Survey on time scales from 24 minutes to tens of days. We find that about one percent of the point sources down to V = 24 are variables. We discuss the variability ... More
D1/D5 systems in ${\cal N}=4$ string theoriesDec 13 2000We propose CFT descriptions of the D1/D5 system in a class of freely acting Z_2 orbifolds/orientifolds of type IIB theory, with sixteen unbroken supercharges. The CFTs describing D1/D5 systems involve N=(4,4) or N=(4,0) sigma models on $(R^3\times S^1\times ... More
Two-point correlators in non-conformal $\mathcal{N}=2$ gauge theoriesJan 28 2019May 28 2019We study the two-point correlation functions of chiral/anti-chiral operators in $N=2$ supersymmetric Yang-Mills theories on $R^4$ with gauge group SU(N) and $N_f$ massless hypermultiplets in the fundamental representation. We compute them in perturbation ... More
Doppler-beaming in the Kepler light curve of LHS 6343 AMar 10 2014Context. Kepler observations revealed a brown dwarf eclipsing the M-type star LHS 6343 A with a period of 12.71 days. In addition, an out-of-eclipse light modulation with the same period and a relative semi-amplitude of 2 x 10^-4 was observed showing ... More
Formal deduction of the Saint-Venant-Exner model including arbitrarily sloping sediment beds and associated energyJun 18 2015In this work we present a deduction of the Saint-Venant-Exner model through an asymptotic analysis of the Navier-Stokes equations. A multi-scale analysis is performed in order to take into account that the velocity of the sediment layer is smaller than ... More
Galoisian Approach to integrability of Schrödinger EquationAug 20 2010Dec 07 2010In this paper, we examine the non-relativistic stationary Schr\"odinger equation from a differential Galois-theoretic perspective. The main algorithmic tools are pullbacks of second order ordinary linear differential operators, so as to achieve rational ... More
From inflation to dark energy through a dynamical Lambda: an attempt at alleviating fundamental cosmic puzzlesJul 23 2013Aug 16 2013After decades of successful hot big-bang paradigm, Cosmology still lacks a framework in which the early inflationary phase of the universe smoothly matches the radiation epoch and evolves to the present `quasi' de Sitter spacetime. No less intriguing ... More
Status of the ANAIS experiment at CanfrancNov 20 2002The present status of the ANAIS experiment (Annual Modulation with NaI's) is shown. ANAIS is intended to use more than 100 kg of NaI(Tl) in the Canfranc Underground Laboratory (Spain) searching for seasonal modulation effects in the WIMP signal; in a ... More
First results of the ROSEBUD Dark Matter experimentApr 20 2000Rare Objects SEarch with Bolometers UndergrounD) is an experiment which attempts to detect low mass Weak Interacting Massive Particles (WIMPs) through their elastic scattering off Al and O nuclei. It consists of three small sapphire bolometers (of a total ... More
LRG-BEASTS: transmission spectroscopy and retrieval analysis of the highly-inflated Saturn-mass planet WASP-39bAug 06 2019Sep 17 2019We present a ground-based transmission spectrum and comprehensive retrieval analysis of the highly inflated Saturn-mass planet WASP-39b. We obtained low-resolution spectra ($R \approx 400$) of a transit of WASP-39b using the ACAM instrument on the 4.2m ... More
Sensitivity plots for WIMP modulation searchesDec 28 1999Prospects of WIMP searches using the annual modulation signature are discussed on statistical grounds, introducing sensitivity plots for the WIMP-nucleon scalar cross section.
Sensitivity plots for WIMP direct detection using the annual modulation signatureDec 17 1999Annual modulation due to the Earth's motion around the Sun is a well known signature of the expected WIMP signal induced in a solid state underground detector. In the present letter we discuss the prospects of this technique on statistical grounds, introducing ... More
Evaluation of (BH)max and magnetic anisotropy of cobalt ferrite nanoparticles synthesized in gelatinJun 01 2015CoFe2O4 nanoparticles were synthesized using gelatin as a polymerizing agent. Structural, morphological and magnetic properties of samples treated at different temperatures were investigated by X-ray diffraction, scanning electron microscopy, Mossbauer ... More
Spitzer Observations of the Lambda Orionis cluster. II. Disks around solar-type and low mass starsAug 23 2010We present IRAC/MIPS Spitzer Space Telescope observations of the solar type and the low mass stellar population of the young (~5 Myr) Lambda Orionis cluster. Combining optical and 2MASS photometry, we identify 436 stars as probable members of the cluster. ... More
Graded Orbital Occupation near Interfaces in a La2NiO4 - La2CuO4 SuperlatticeJun 03 2011Nov 11 2011X-ray absorption spectroscopy and resonant soft x-ray reflectivity show a non-uniform distribution of oxygen holes in a La2NiO4 - La2CuO4 (LNO-LCO) superlattice, with excess holes concentrated in the LNO layers. Weak ferromagnetism with Tc = 160 K suggests ... More
Pseudoconnections and Ricci flowSep 25 2015In this note we explain how a flow in the space of Riemmanian metrics (including Ricci's \cite{mt}) induces one in the space of pseudoconnections.
Photoemission and the Electronic Structure of PuCoGa5Oct 09 2003The electronic structure of the first Pu based superconductor PuCoGa5 is explored using photoelectron spectroscopy and a novel theoretical scheme. Exceptional agreement between calculation and experiment defines a path forward for understanding electronic ... More
On the trend to global equilibrium for Kuramoto OscillatorsAug 21 2019In this paper, we study the convergence to the stable equilibrium for Kuramoto oscillators. Specifically, we derive estimates on the rate of convergence to the global equilibrium for solutions of the Kuramoto-Sakaguchi equation in a large coupling strength ... More
Multi-epoch Spectroscopy of IY UMa: Quiescence, Rise, Normal Outburst & SuperoutburstNov 17 2004We exploit rare observations covering the time before and during a normal outburst in the deeply-eclipsing SU UMa system IY UMa to study the dramatic changes in the accretion flow and emission at the onset of outburst. Through Doppler tomography we study ... More
Detection of the secondary eclipse of WASP-10b in the Ks-bandDec 09 2014WASP-10b, a non-inflated hot Jupiter, was discovered around a K-dwarf in a near circular orbit ($\sim $$0.06$). Since its discovery in 2009, different published parameters for this system have led to a discussion about the size, density, and eccentricity ... More
The Chandra High Energy Transmission Grating Spectrometer probes the dusty warm absorber in the Seyfert 1 galaxy MCG--6-30-15Oct 29 2001The Chandra HETGS spectra of the Seyfert 1 galaxy MCG--6-30-15 show numerous narrow, unresolved (FWHM < 200 km/s) absorption lines from a wide range of ionization states of N, O, Mg, Ne, Si, S, Ar, and Fe. The initial analysis of these data, presented ... More
Biased Reionisation and Non-Gaussianity in Redshifted 21cm Intensity Maps of the Reionisation EpochMar 05 2007Spatial dependence in the statistics of redshifted 21cm fluctuations promises to provide the most powerful probe of the reionisation epoch. In this paper we consider the second and third moments of the redshifted 21cm intensity distribution using a simple ... More
A Search for TeV Gamma-Ray Burst Emission with the Milagro ObservatoryAug 06 2003The Milagro telescope monitors the northern sky for 100 GeV - 100 TeV transient emission through continuous very high energy wide-field observations. The large effective area and low energy threshold of Milagro allow it to detect very high energy gamma-ray ... More
Characterizing finite sets of nonwandering pointsOct 25 2011We characterize finite sets $S$ of nonwandering points for generic diffeomorphisms $f$ as those which are {\em uniformly bounded}, i.e., there is an uniform bound for small perturbations of the derivative of $f$ along the points in $S$ up to suitable ... More
On supports of expansive measuresJan 14 2016We prove that a homeomorphism of a compact metric space has an expansive measure \cite{ms} if and only if it has many ones with invariant support. We also study homeomorphisms for which the expansive measures are dense in the space of Borel probability ... More
Generic extensions and generic Polynomials for multiplicative groupsMay 30 2014Let $\mathcal{A}$ be a finite-dimensional algebra over a finite field $\mathbf{F}_q$ and let $G=\mathcal{A}^\times$ be the multiplicative group of $\mathcal{A}$. In this paper, we construct explicitly a generic Galois $G$-extension $S/R$, where $R$ is ... More
Diagrammatic approach to cellular automata and the emergence of form with inner structureMay 23 2016Apr 02 2018We present a diagrammatic method to build up sophisticated cellular automata (CAs) as models of complex physical systems. The diagrams complement the mathematical approach to CA modeling, whose details are also presented here, and allow CAs in rule space ... More
Cellular automaton for chimera statesFeb 11 2016Apr 14 2016A minimalistic model for chimera states is presented. The model is a cellular automaton (CA) which depends on only one adjustable parameter, the range of the nonlocal coupling, and is built from elementary cellular automata and the majority (voting) rule. ... More
A Conforming Primal-Dual Mixed Formulation for the 2D Multiscale Porous Media Flow ProblemJan 04 2017Oct 02 2018In this paper a new primal-dual mixed finite element method is introduced, aimed to model multiscale problems with several geometric subregions in the domain of interest. In each of these regions porous media fluid flow takes place, but governed by physical ... More
Point contact tunnelling spectroscopy of the density of states in Tb-Mg-Zn quasicrystalsFeb 25 2016According to theoretical predictions the quasicrystalline (QC) electronic density of states (DOS) must have a rich and fine spiky structure which actually has resulted elusive. The problem with its absence may be related to poor structural characteristics ... More
On the Homogenization of Geological Fissured Systems With Curved non-periodic CracksDec 14 2013We analyze the steady fluid flow in a porous medium containing a network of thin fissures i.e. width $\mathcal{O}(\epsilon)$, where all the cracks are generated by the rigid translation of a continuous piecewise $C^{1}$ functions in a fixed direction. ... More
String Theory on Dp-plane wavesOct 23 2002Feb 03 2003We study the spectrum of solvable string models on plane waves descending from non-conformal Dp-brane geometries. We mainly focus on S-dual F1/D1-waves in type IIB and type I/heterotic 10D superstrings. We derive the Kaluza-Klein spectrum of N=1,2 10D ... More
Embedded $\mathbf{Q}$-Resolutions for Yomdin-Lê Surface SingularitiesJun 03 2012In a previous work we have introduced and studied the notion of embedded $\mathbf{Q}$-resolution, which essentially consists in allowing the final ambient space to contain abelian quotient singularities. Here we explicitly compute an embedded $\mathbf{Q}$-resolution ... More
On the Construction of Geometric Parameters for Preferential Fluid Flow Information in Fissured MediaFeb 19 2014For a fissured medium, we analyze the impact that the geometry of the cracks, has in the phenomenon of preferential fluid flow. Using finite volume meshes we analyze the mechanical energy dissipation due to gravity, curvature of the surface and friction ... More