Results for "Abdel Pérez-Lorenzana"

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Dirac neutrino mixings from hidden $μ-τ$ symmetryFeb 06 2018Feb 13 2018We explore masses and mixings for Dirac neutrinos in models where lepton number is conserved, under the guidance of a hidden, but broken, $\mu-\tau$ exchange symmetry, that makes itself evident in the squared hermitian mass matrix. We study the parameter ... More
Deviations to Tri-Bi-Maximal mixing in the limit of $μ-τ$ symmetryMar 13 2019In the limit of an approximate $\mu-\tau$ symmetry in the neutrino mass matrix, we explore deviations to the Tri-Bi-Maximal mixing pattern in the neutrino sector. We consider two different ansatzes for the corrected pattern to predict the current values ... More
An Introduction to Extra DimensionsMar 17 2005May 30 2005Models that involve extra dimensions have introduced completely new ways of looking up on old problems in theoretical physics. The aim of the present notes is to provide a brief introduction to the many uses that extra dimensions have found over the last ... More
An Introduction to the Brane WorldJun 24 2004Oct 06 2004The study of the so called brane world models has introduced completely new ways of looking up on standard problems in many areas of theoretical physics. Inspired in the recent developments of string theory, the Brane World picture involves the introduction ... More
Three flavour neutrino oscillations in models with large extra dimensionsJun 23 2000Jul 11 2000The key challenges for models with large extra dimensions, posed by neutrino physics are: first to understand why neutrino masses are small and second, whether one can have a simultaneous explanation of all observed oscillation phenomena. There exist ... More
Effect of Extra Dimensions on Gauge Coupling UnificationApr 30 1999Aug 02 1999The effects of extra dimensions on gauge coupling unification is studied. We start with a comparison between power law running of the gauge couplings in models with extra dimensions and logarithmic running that happens in many realistic cases. We then ... More
Exact solutions of n-level systems and gauge theoriesJul 06 1999Sep 17 1999We find a relationship between unitary transformations of the dynamics of quantum systems with time-dependent Hamiltonians and gauge theories. In particular, we show that the nonrelativistic dynamics of spin-$\frac12$ particles in a magnetic field $B^i ... More
Minimal coupling and Feynman's proofOct 29 1998Sep 17 1999The non quantum relativistic version of the proof of Feynman for the Maxwell equations is discussed in a framework with a minimum number of hypotheses required. From the present point of view it is clear that the classical equations of motion corresponding ... More
Small Dirac Neutrino Masses and R-parity from Anomalous U(1) SymmetryDec 03 2001Apr 10 2002We suggest that many of the free parameters in the supersymmetric extensions of the Standard Model can be all linked together to the existence of a non universal U(1) gauge symmetry, which has been spontaneously broken at very high scale. Such a symmetry ... More
Neutrino Masses and Oscillations in Models with Large Extra DimensionsJul 27 1999Sep 15 1999We discuss the profile of neutrino masses and mixings in models with large extra dimensions when right handed neutrinos are present in the branes along with the usual standard model particles. In these models, string scale must be bigger than $10^{8}$ ... More
GUTs and String-GUTsNov 30 1999We look for a connection between string theories and Grand Unified Theories (GUTs), with the aim to look for new insights in the existing four dimensional string-GUT problems. We argue that the construction of consistent string-GUT models could require ... More
Unification of cosmological scalar fieldsJul 11 2007Mar 12 2008We present a model where early inflation and late accelerating expansion of the Universe are driven by the real and imaginary parts of a single complex scalar field, which we identified as inflaton and phantom field, respectively. This inflaton-phantom ... More
Affleck-Dine leptogenesis via right-handed sneutrino fields in a supersymmetric hybrid inflation modelJul 23 2001The onset of inflation in hybrid models require fine tuning in the initial conditions. The inflaton field should have an initial value close to the Planck scale $M_{P}$, whereas the auxiliary "orthogonal" field must be close to zero with an extreme accuracy. ... More
Assisted inflation via tachyon condensationJul 05 2001Aug 15 2001In this paper we propose a new mechanism of inflating the Universe with non-BPS $D4$ branes which decay into stable $D3$ branes via tachyon condensation. In a single brane scenario the tachyon potential is very steep and unable to support inflation. However ... More
Left-right symmetric model with $μ\leftrightarrowτ$ symmetryDec 28 2009Aug 11 2010We analyze the leptonic sector in the left-right symmetric model dressed with a $(Z_{2})^{3}$ discrete symmetry which realizes, after weak spontaneous breaking, a small broken $\mu\lra\tau$ symmetry that is suggested to explain observable neutrino oscillation ... More
Dirac neutrino mixings from hidden $μ-τ$ symmetryFeb 06 2018We explore masses and mixings for Dirac neutrinos in models where lepton number is conserved, under the guidance of a hidden, but broken, $\mu-\tau$ exchange symmetry, that makes itself evident in the squared hermitian mass matrix. We study the parameter ... More
Generating $θ_{13}$ from sterile neutrinos in $μ- τ$ symmetric modelsJul 24 2015Oct 07 2015The smallness of the $\theta_{13}$ mixing angle as observed in neutrino oscillation experiments can be understood through an approximated $\mu - \tau$ exchange symmetry in the neutrino mass matrix. Using recent oscillation neutrino data, but assuming ... More
Softly broken $μ\leftrightarrowτ$ symmetry in the minimal see-saw modelNov 01 2007Jun 27 2008Neutrino oscillations data indicates that neutrino mixings are consistent with an apparent $\nu_\mu - \nu_\tau$ exchange symmetry in neutrino mass matrix. We observe that in the mininimally extended standard model with the see-saw mechanism, one can impose ... More
Leptonic CP phases near the $μ-τ$ symmetric limitMar 07 2016Jun 30 2016The neutrino masses and mixings indicated by current neutrino oscillation experiments suggest that the neutrino mass matrix possesses an approximate $\mu-\tau$ exchange symmetry. In this study, we explore the neutrino parameter space and show that if ... More
An [SU(3)]^4 Supersymmetric grand unified modelDec 17 1998Aug 30 1999We present a grand unified model based on the supersymmetric $SU(3)_L\otimes SU(3)_{CL}\otimes SU(3)_{CR}\otimes SU(3)_R$ gauge group, which unifies in one single step the three gauge couplings of the standard model at an scale $M\sim 10^{18}$ GeV, and ... More
Baryogenesis in theories with large extra spatial dimensionsAug 27 2001We describe a simple and predictive scenario for baryogenesis in theories with large extra dimensions which resembles Affleck-Dine baryogenesis. The Affleck-Dine field is a complex scalar field carrying a $U(1)_{\chi}$ charge which is dynamically broken ... More
Nonsupersymmetric gauge coupling unfication in [SU(6)]$^4\times$ Z$_4$ and proton stabilityJan 14 1999We systematically study the three family extension of the Pati-Salam gauge group with an anomaly-free single irreducible representation which contains the known quarks and leptons without mirror fermions. In the context of this model we implement the ... More
Baryogenesis in models with large extra dimensionsJan 29 2002We describe how difficult it is to realise baryogenesis in models where the fundamental scale in nature is as low as TeV. The problem becomes even more challenging if we assume that there are only {\it two} extra compact spatial dimensions, because thermal ... More
Non SUSY and SUSY one--step UnificationAug 18 1998We explore the possibility of achieving one--step unification of the standard model coupling constants within non supersymmetric and supersymmetric gauge models, which at low energies have only the standard particle content. The constraints are the experimental ... More
Non SUSY Unification in Left-Right ModelsDec 17 1998We explore in a model independent way the possibility of achieving the non supersymmetric gauge coupling unification within left-right symmetric models, with the minimal particle content at the left-right mass scale which could be as low as 1 TeV in a ... More
Charge Asymmetry in the Brane World and Formation of Charged Black HolesMar 01 2002Feb 17 2003In theories with an infinite extra dimension, free particles localized on the brane can leak out to the extra space. We argue that if there were color confinement in the bulk, electrons would be more able to escape than quarks and than protons (which ... More
Cosmic Bose dark matterOct 12 2011Cold and hot dark matter (CDM, HDM) imprint distinctive effects on the cosmological observables, naturally, they are often thought to be made of different kinds of particles. However, we point out that CDM and HDM could share a common origin, a Bose-Einstein ... More
A dynamical stabilization of the radion potentialFeb 14 2001Apr 24 2001Large extra dimensional theories attempt to solve the hierarchy problem by assuming that the fundamental scale of the theory is at the electroweak scale. This requires the size of the extra dimensions to be stabilized at a scale which is determined by ... More
Affleck-Dine baryogensis in large extra dimensionsMar 20 2001Apr 23 2001Baryogenesis in the models where the fundamental scale is as low as TeV in the context of large extra dimensions is a challenging problem. The requirement for the departure from thermal equilibrium necessarily ties any low scale baryogenesis with that ... More
Sneutrino condensate as a candidate for the hot big bang cosmologyJun 15 2004Sep 27 2004If inflationary paradigm is correct, then it must create conditions for the hot big bang model with all observed matter, baryons and the seed perturbations for the structure formation. In this paper we propose a scenario where the inflaton energy density ... More
Sneutrino condensate source for density perturbations, leptogenesis and low reheat temperatureNov 08 2003May 16 2004We bring together some known ingredients beyond the Standard Model physics which can explain the hot Big Bang model with the observed baryon asymmetry and also the fluctuations in the cosmic microwave background radiation with a minimal set of assumptions. ... More
Efficient computation of first passage times in Kou's jump-diffusion modelApr 20 2016May 11 2016S. G. Kou and H. Wang [First Passage times of a Jump Diffusion Process \textit{Ann. Appl. Probab.} {\bf 35} (2003) 504--531] give expressions of both the (real) Laplace transform of the distribution of first passage time and the (real) Laplace transform ... More
Algebraic Investigation of the Soft Seven SphereFeb 08 2000Feb 10 2000We investigate the seven sphere as a soft Lie algebra i.e. an algebra with structure functions instead of structure constants. We calculate its structure functions explicitly and also discuss some relevant points such as the validity of the Jacobi identities. ... More
The Ring Division Self DualityOct 23 1997Nov 19 1997We present a simple construction of the instantonic type equation over octonions where its similarities and differences with the quaternionic case are very clear. We use the unified language of Clifford Algebra. We argue that our approach is the pure ... More
Beyond OctonionsFeb 08 2000Feb 10 2000We investigate Clifford Algebras structure over non-ring division algebras. We show how projection over the real field produces the standard Attiyah-Bott-Shapiro classification.
New Index for Quantifying an Individual's Scientific Research OutputMay 26 2013Classifying researchers according to the quality of their published work rather than the quantity is a curtail issue. We attempt to introduce a new formula of the percentage range to be used for evaluating qualitatively the researchers' production. The ... More
Ring Division Algebras, Self-Duality and SupersymmetryFeb 18 2000We argue that once octonions are formulated as soft Lie algebras, they may be safely used and the non-associativity can be overcame. The necessary points are: (a) Fixing the direction of action by introducing the \delta operator. (b) Closing the \delta ... More
Unified Octonionic Representation of the 10-13 Dimensional Clifford AlgebraApr 07 1997We give a one dimensional octonionic representation of the different Clifford algebra Cliff(5,5)\sim Cliff(9,1), Cliff(6,6)\sim Cliff(10,2) and lastly Cliff(7,6)\sim Cliff(10,3) which can be given by (8x8) real matrices taking into account some suitable ... More
Off-Shell Formulation of Simple Supersymmetric Yang-MillsFeb 14 2000An off-shell formulation for 6 and 10 dimensions simple supersymmetric Yang-Mills theories is presented. While the fermionic fields couple to left action of S^3 and S^7 respectively, the auxiliary ones couple to right action (and vice versa). To close ... More
The Compatibility between the Higher Dimensions Self Duality and the Yang-Mills Equation of MotionNov 19 1997We study the compatiblity between the higher dimension dualities and the Yang-Mills equation of motion. Taking a 't Hooft solution as a starting point, we come to the conclusion that for only 4 dimensions the self duality implies the equation of motion ... More
Unified Octonionic Representation of the 10-13 Dimensions Clifford AlgebraFeb 25 1997We give a one dimensional octonionic representation of the different Clifford algebra $Cliff(5,5)\sim Cliff(1,9), Cliff(6,6)\sim Cliff(2,10)$ and lastly $Cliff(7,6)\sim Cliff(3,10)$.
Ultra light bosonic dark matter and cosmic microwave backgroundAug 01 2009Nov 24 2010In this paper, we consider the hypothesis in which a species of ultra light bosonic dark matter (ULBDM) with mass $m_{B}\sim 10^{-22}$ eV could be the dominant dark matter (DM) in the Universe. As a first approach we work in the context of kinetic theory, ... More
Left-right symmetry in 5D and neutrino mass in TeV scale gravity modelsMay 31 2002Jun 14 2002We construct a left-right symmetric model based on the gauge group $SU(2)_L\times SU(2)_R\times U(1)_{B-L}$ in five dimensions where both the gauge bosons and fermions reside in all five dimensions. The orbifold boundary conditions are used not only to ... More
Dumping inflaton energy density out of this worldMar 03 2004We argue that a brane world with a warped, infinite extra dimension allows for the inflaton to decay into the bulk so that after inflation, the effective dark energy disappears from our brane. This is achieved by the redshifting of the decay products ... More
Angular Inflation from SupergravityNov 28 2001Aug 13 2002We study supergravity inflationary models where inflation is produced along the angular direction. For this we express the scalar component of a chiral superfield in terms of the radial and the angular components. We then express the supergravity potential ... More
Final reheating temperature on a single braneMay 14 2001Jul 13 2001We make a generic remark on thermal history of a single brane cosmology in models with an infinitely large single extra dimension. We point out that the reheat temperature of the Universe is bounded by an excess production of gravitons from the thermal ... More
Restrictive scenarios from Lorentz Invariance Violation to cosmic rays propagationSep 30 2016Lorentz Invariance Violation introduced as a generic modification to particle dispersion relations is used to study high energy cosmic ray attenuation processes. It is shown to reproduce the same physical effects for vacuum Cherenkov radiation, as in ... More
Vacuum Cherenkov radiation and photon decay rates from generic Lorentz Invariance ViolationSep 22 2016Among the most studied approaches to introduce the breaking of Lorentz symmetry, the generic approach is one of the most frequently used for phenomenology, it converges on the modification of the free particle dispersion relation. Using this approach ... More
Implications of Lorentz symmetry violation on a 5D supersymmetric modelJul 07 2016Field models with $n$ extra spatial dimensions have a larger $SO(1,3+n)$ Lorentz symmetry which is broken down to the standard $SO(1,3)$ four dimensional symmetry by the compactification process. By considering all Lorentz violating operators in a $5D$ ... More
Breaking Parity Symmetry Using Extra DimensionsSep 15 1999Nov 17 1999We present a new way to break parity symmetry in left-right symmetric models using boundary conditions on the fields residing in the fifth dimension. We also discuss the connection between the limits on the size of extra dimensions and the scale of right ... More
Surface photometry of NGC 3077Nov 03 2000We present surface photometry of the irregular galaxy NGC 3077 using two data sets: photographic plates and CCD images. Isophotal contours, luminosity and colour distributions as well as position angle and ellipticity curves show that NGC 3077 is similar ... More
Stellar Population analysis from Broad-Band ColoursNov 03 2000Nov 23 2000We have developed an analytical method to investigate the stellar populations in a galaxy using the broad-band colours. The method enables us to determine the relative contribution, spatial distribution and age for different stellar populations and gives ... More
Kinematic constrains on interacting nucleons in $Pb+Pb$ collisions at $\sqrt{s_{NN}}=2.76$ TeV within the HIJING codeFeb 04 2016Feb 25 2016The kinematic constrains on interacting nucleons in Large Hadron Collider (LHC) heavy-ion collisions are investigated in the framework of the Heavy Ion Jet Interaction Generator (HIJING) code incorporated with a collective cascade recipe. The latter is ... More
Equation of State for Cosmological Matter at and beyond QCD and Electroweak ErasFeb 28 2019Various thermodynamic quantities for baryon-free matter are calculated by combining the most reliable non-perturbative and perturbative calculations, especially the most recent ones including as many quark flavors as possible. We extend these calculations ... More
Entanglement sudden birth of two trapped ions interacting with a time-dependent laser fieldMay 23 2008Jan 11 2009We explore and develop the mathematics of the two multi-level ions. In particular, we describe some new features of quantum entanglement in two three-level trapped ions confined in a one-dimensional harmonic potential, allowing the instantaneous position ... More
Measuring Shear Viscosity Using Transverse Momentum Correlations in Relativistic Nuclear CollisionsJun 29 2006Jun 30 2006Elliptic flow measurements at RHIC suggest that quark gluon plasma flows with very little viscosity compared to weak coupling expectations, challenging theorists to explain why this fluid is so nearly ``perfect''. It is therefore vital to find quantitative ... More
Probing Quark Gluon Liquid Using Transverse Momentum FluctuationsOct 03 2005The onset of equilibration in nuclear collisions can lead to related trends in the centrality dependence of the average transverse momentum, pt fluctuations and net charge fluctuations. We extend the transport description of S. Gavin (Phys. Rev. Lett. ... More
Enhanced Secure Algorithm for Fingerprint RecognitionFeb 20 2014Fingerprint recognition requires a minimal effort from the user, does not capture other information than strictly necessary for the recognition process, and provides relatively good performance. A critical step in fingerprint identification system is ... More
Infrared Laser Driven Double Proton Transfer. An Optimal Control Theory StudyDec 09 2009Laser control of ultrafast double proton transfer is investigated for a two-dimensional model system describing stepwise and concerted transfer pathways. The pulse design has been done by employing optimal control theory in combination with the multiconfiguration ... More
Strange Fluctuations at RHICSep 06 2002Robust statistical observables can be used to extract the novel isospin fluctuations from background contributions in K-short K-plus measurements in nuclear collisions. To illustrate how this can be done, we present new HIJING and UrQMD computations of ... More
The SuperB factory: Physics Prospects and Project StatusDec 17 2012I will briefly review of some highlights of the SuperB physics programme, the status of the accelerator and detector studies, and the future plans.
Small Active and Sterile Neutrino Masses from the TeV ScaleAug 20 2001A new mechanism for understanding small neutrino masses using only simple new physics at the TeV scale is proposed. As an application, it is shown how it can naturally lead to the mass hierarchy of the so called bimaximal mixing in the case of three active ... More
Radion Cosmology in Theories with Universal Extra DimensionsOct 21 2003We discuss cosmology of models with universal extra dimensions, where the Standard Model degrees of freedom live in a $4+n$ dimensional brane, with $n$ compact and small extra spatial dimensions. In these models, the simplest way to obtain the conventional ... More
One Step Non SUSY UnificationAug 22 1997We show that it is possible to achieve one step gauge coupling unification in a general class of non supersymmetric models which at low energies have only the standard particle content and extra Higgs fields doublets. The constraints are the experimental ... More
Decoherent many-body dynamics of a nano- mechanical resonator coupled to charge qubitsMar 14 2010The dynamics of charge qubits coupled to a nanomechanical resonator under influence of both a phonon bath in contact with the resonator and irreversible decay of the qubits is considered. The focus of our analysis is devoted to multi partite entanglement ... More
Forward-Backward Charge Fluctuations at RHIC EnergiesAug 08 2006We use the ultra-relativistic quantum molecular dynamic UrQMD version 2.2 to study forward backward fluctuations and compare our results with the published data by the PHOBOS.
Octonionic Dirac EquationSep 03 1996In order to obtain a consistent formulation of octonionic quantum mechanics (OQM), we introduce left-right barred operators. Such operators enable us to find the translation rules between octonionic numbers and $8\times 8$ real matrices (a translation ... More
Octonionic Quantum Mechanics and Complex GeometrySep 03 1996The use of complex geometry allows us to obtain a consistent formulation of octonionic quantum mechanics (OQM). In our octonionic formulation we solve the hermiticity problem and define an appropriate momentum operator within OQM. The nonextendability ... More
Topological Defects in $[SU(6)]^3 \times Z_3$Jul 15 1996Jul 14 1998We study topological defects arising in the Grand Unification Model $SU(6)_L\otimes SU(6)_c \otimes SU(6)_R \times Z_3$. We show that the model does not contain domain walls, while it produces massive magnetic monopoles and it may, depending on the symmetry ... More
Radion stabilization from the vacuum on flat extra dimensionsMay 01 2007Jan 26 2008Volume stabilization in models with flat extra dimension could follow from vacuum energy residing in the bulk when translational invariance is spontaneously broken. We study a simple toy model that exemplifies this mechanism which considers a massive ... More
Large Lepton Mixings Induced by Sterile NeutrinoDec 30 2000Mar 19 2001We assume that the mass matrix of active neutrinos has hierarchical form with small mixings, similar to quark mass matrix. We show that the large mixings between $\nu_\mu$ and $\nu_\tau$ as well as between $\nu_e$ and certain combination of $\nu_\mu$ ... More
Electric Charge Quantization and Extra DimensionsMay 15 2002Feb 04 2003In models with flat extra dimensions tiny Dirac neutrino masses can be generated via the coupling of four dimensional Standard Model fields to a higher dimensional fermion. Here we argue that, in spite of the Dirac nature of the neutrino, quantization ... More
Flat-lens design using Field Transformation and its comparison with those based on Transformation Optics and Ray OpticsMay 02 2013This paper proposes a technique for designing flat lenses using Field Transformation (FT), as opposed to Ray Optics (RO) or Transformation Optics (TO). The lens design consists of 10 layers of graded index dielectric in the radial direction and 5 layers ... More
Entanglement Sudden Death and Sudden Birth in Semiconductor MicrocavitiesApr 15 2011We explore the dynamics of the entanglement in a semiconductor cavity QED containing a quantum well. We show the presence of sudden birth and sudden death for some particular sets of the system parameters.
Status, open problems and prospects of the decay B^+ -> l^+ nu_lDec 06 2010The study of rare B-decays at SuperB provides unique opportunities to understand the Standard Model and constrain new physics. We discuss the new physics potential of the leptonic B^+ -> l^+ nu_l decays from the proposed SuperB experiment with 75ab-1 ... More
Attitude dynamics and control of spacecraft using geomagnetic Lorentz forceMay 17 2014The attitude stabilization of a charged rigid spacecraft in Low Earth Orbit (LEO) using torques due to Lorentz force in pitch and roll directions is considered. A spacecraft that generates an electrostatic charge on its surface in the Earth magnetic field ... More
Approximate Solution to the Fractional Second Type Lane-Emden EquationDec 30 2015The spherical isothermal Lane-Emden equation is a second order non-linear differential equation that model many configurations in astrophysics. In the present paper and based on the fractal index technique and the series expansion, the fractional lane-Emden ... More
Octonionic Representations of GL(8,R) and GL(4,C)Jul 17 1996Jul 18 1996Octonionic algebra being nonassociative is difficult to manipulate. We introduce left-right octonionic barred operators which enable us to reproduce the associative GL(8,R) group. Extracting the basis of GL(4,C), we establish an interesting connection ... More
Optimal discrete-time output feedback control for multi-area load frequency control using evolutionary programmingMar 07 2019The interconnected power system presents a great challenge to both system analyzers and control designers. The load-frequency control (LFC) problem has gained much importance because of the complexity and size of modern interconnected power systems. In ... More
Information under Lorentz transformationFeb 11 2014A general form of a two-qubit system is obtained under the effect of Lorentz transformation. We investigate extensively some important classes in the context of quantum information. It is shown Lorentz transformation causes a decay of entanglement and ... More
Homological dimensions and abelian model structures on chain complexesFeb 12 2012Apr 01 2014We construct Abelian model structures on the category of chain complexes over a ring $R$, from the notion homological dimensions of modules. Given an integer $n > 0$, we prove that the left modules over a ringoid $\mathfrak{R}$ with projective dimension ... More
On the reflexivity of $\mathcal{P}_{w}(^{n}E;F)$Mar 20 2017In this paper we prove that if $E$ and $F$ are reflexive Banach spaces and $G$ is a closed linear subspace of the space $\mathcal{P}_{w}(^{n}E;F)$ of all $n$-homogeneous polynomials from $E$ to $F$ which are weakly continuous on bounded sets, then $G$ ... More
Rare Decays with Missing Energy at SuperBDec 06 2010The study of rare B-decays at SuperB provides unique opportunities to understand the Standard Model and to constrain new physics. It is discussed the new physics potential of the B -> K\nu\nu and B -> K^*\nu\nu system from the proposed SuperB experiment ... More
The conditioning of block Kronecker $\ell$-ifications of matrix polynomialsAug 03 2018Aug 08 2018A strong $\ell$-ification of a matrix polynomial $P(\lambda)=\sum A_i\lambda^i$ of degree $d$ is a matrix polynomial $\mathcal{L}(\lambda)$ of degree $\ell$ having the same finite and infinite elementary divisors, and the same numbers of left and right ... More
Asymptotic properties of the Dirac quantum cellular automatonApr 28 2015Jan 25 2016We show that the Dirac quantum cellular automaton [Ann. Phys. 354 (2015) 244] shares many properties in common with the discrete-time quantum walk. These similarities can be exploited to study the automaton as a unitary process that takes place at regular ... More
An Agent-Based Modeling for Pandemic Influenza in EgyptJan 28 2010Pandemic influenza has great potential to cause large and rapid increases in deaths and serious illness. The objective of this paper is to develop an agent-based model to simulate the spread of pandemic influenza (novel H1N1) in Egypt. The proposed multi-agent ... More
Artificial Immune Systems Metaphor for Agent Based Modeling of Crisis Response OperationsApr 21 2010Crisis response requires information intensive efforts utilized for reducing uncertainty, calculating and comparing costs and benefits, and managing resources in a fashion beyond those regularly available to handle routine problems. This paper presents ... More
Bridging the Gap between Crisis Response Operations and SystemsAug 28 2009There exist huge problems in the current practice of crisis response operations. Response problems are projected as a combination of failure in communication, failure in technology, failure in methodology, failure of management, and finally failure of ... More
Multi-Agent Crisis Response systems - Design Requirements and Analysis of Current SystemsMar 14 2009Crisis response is a critical area of research, with encouraging progress in the past view yeas. The aim of the research is to contribute to building future crisis environment where software agents, robots, responders, crisis managers, and crisis organizations ... More
Infrared optical absorption spectra of CuO single crystals: Fermion-spinon band and dimensional crossover of the antiferromagnetic orderNov 13 2009We have obtained mid-infrared optical absorption spectra of the S=1/2 quasi one-dimensional CuO using polarized transmission measurement and interpreted the spectra in terms of phonon assisted magnetic excitations. When the electric field is parallel ... More
The Scalar Sector and the Eta -> 3 Pi ProblemApr 17 2003First, recent work on light scalar mesons, which is of possible interest in connection with the strong coupling region of QCD is briefly discussed. Then a very short highlighting of a paper concerned with an application to the eta -> 3 pi problem is presented. ... More
Multi-Qubit Dynamical Quantum Search Algorithm with DissipationSep 16 2015We invoke an efficient search algorithms as a key challenge in multi-qubit quantum systems. An original algorithm called dynamical quantum search algorithm from which Grover algorithm is obtained at a specified time is presented. This algorithm is distinguished ... More
Forecasting and skipping to Reduce Transmission Energy in WSNJun 06 2016This paper deals with the improvement of energy efficiency in wireless sensor networks (WSN).Taking into consideration the power saving problem which is of crucial importance when the sensors are supplied by a limited power source, this paper proposes ... More
Enabling comparison of UrQMD with Geant4 hadronic modelsDec 19 2010Geant4 has an abundant set of physics models that handle the diverse interaction of particles with matter across a wide energy range. However, there are also many well established reaction codes currently used in the same fields where Geant4 is applied. ... More
Local compactness in right bounded asymmetric normed spacesFeb 13 2017We characterize the finite dimensional asymmetric normed spaces which are right bounded and the relation of this property with the natural compactness properties of the unit ball, as compactness and strong compactness. In contrast with some results found ... More
Extreme points and geometric aspects of compact convex sets in asymmetric normed spacesApr 02 2014Inspired in the theorem of Krein-Milamn, we investigate the existence of extreme points in compact convex subsets of asymmetric normed spaces. We focus our attention in the finite dimensional case, giving a geometric description of all compact convex ... More
Inflation in Models with Large Extra Dimensions Driven by a Bulk Scalar FieldMar 09 2000Sep 01 2000We discuss inflation in models with large extra dimensions, driven by a bulk scalar field. The brane inflaton is then a single effective field, obtained from the bulk scalar field by scaling. The self interaction terms of the effective brane inflaton ... More
Dramatic enhancement of spin-spin coupling and quenching of magnetic dimensionality in compressed silver difluorideJul 16 2018Meta-GGA calculations of the ambient and high-pressure polymorphs of silver difluoride indicate that the compression-induced structural changes lead to a 3.5-fold increase in the strength of antiferomagnetic spin-spin interactions resulting in coupling ... More
Symmetry Breaking in $[SU(6)]^3\times Z_3$Aug 22 1997We analize the different ways for the spontaneous breaking of the gauge symmetry, for the $[SU(6)]^3\otimes Z_3$ family unification model. In particular we study the consequences of a previous selection for the vacuum expectation values of the Higgs fields, ... More
Cosmology of Brane-Bulk Models in Five DimensionsMar 31 2000May 06 2000We study the cosmology of models with four space and one time dimension where our universe is a 3-brane and report a few results which extend existing work in several directions. Assuming a stable fifth dimension, we obtain a solution for the metric, ... More