Results for "Abdel Pérez-Lorenzana"

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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
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
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
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
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
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
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
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
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
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
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
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 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
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
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
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
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
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.
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
Efficient computation of first passage times in Kou's jump-diffusion modelApr 20 2016Nov 29 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
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
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
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
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
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
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
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
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
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
$k$th price auctions and Catalan numbersAug 17 2018This paper establishes an interesting link between $k$th price auctions and Catalan numbers by showing that for distributions that have linear density, the bid function at any symmetric, increasing equilibrium of a $k$th price auction with $k\geq 3$ can ... 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
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
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
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
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
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.
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
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
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
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
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 constancy regions for mixed test idealsAug 25 2012Dec 04 2012In this note we study the partition of $\mathbb{R}_{\geq0}^{n}$ given by the regions where the mixed test ideals $\tau(\mathfrak{a}_{1}^{t_{1}}... \mathfrak{a}_{n}^{t_{n}})$ are constant. We show that each region can be described as the preimage of a ... More
SU(3) Polyakov Linear-Sigma Model With Finite Isospin Asymmetry: QCD Phase DiagramApr 22 2019The SU(3) Polyakov linear-sigma model (PLSM) in mean-field approximation is utilized in analyzing the chiral condensates $\sigma_u$, $\sigma_d$, $\sigma_s$ and the deconfinement order parameters $\phi$, $\bar{\phi}$, at finite isospin asymmetry. The bulk ... More
Equilibrium GraphsSep 07 2016In this paper we present an extension of Peirce's existential graphs to provide a diagrammatic representation of expressions in Quantified Equilibrium Logic (QEL). Using this formalisation, logical connectives are replaced by encircled regions (circles ... 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
Type II Seesaw and a Gauge Model for the Bimaximal Mixing Explanation of Neutrino PuzzlesNov 17 1999We present a gauge model for the bimaximal mixing pattern among the neutrinos that explains both the atmospheric and solar neutrino data via large angle vacuum oscillation among the three known neutrinos. The model does not include righthanded neutrinos ... 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
Power Minimization in Distributed Antenna Systems using Non-Orthogonal Multiple Access and Mutual Successive Interference CancellationOct 17 2018This paper introduces new approaches for combining non-orthogonal multiple access with distributed antenna systems. The study targets a minimization of the total transmit power in each cell, under user rate and power multiplexing constraints. Several ... More
Power Minimization Techniques in Distributed Base Station Antenna Systems using Non-Orthogonal Multiple AccessOct 18 2017This paper introduces new approaches for combining non-orthogonal multiple access (NOMA) with distributed base station (DBS) deployments. The purpose of the study is to unlock the true potentials of DBS systems in the NOMA context, since all previous ... 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
Complete Enumeration of Stopping Sets of Full-Rank Parity-Check Matrices of Hamming CodesMar 02 2006Stopping sets, and in particular their numbers and sizes, play an important role in determining the performance of iterative decoders of linear codes over binary erasure channels. In the 2004 Shannon Lecture, McEliece presented an expression for the number ... 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
Crossed-Product Extensions of $L_p$-Bounds for Amenable ActionsNov 25 2016We will extend earlier transference results of Neuwirth and Ricard from the context of noncommutative $L_p$-spaces associated with amenable groups to that of noncommutative $L_p$-spaces over crossed products of amenable and trace-preserving actions. Namely, ... More
Vibrational quenching and reactive processes of weakly bound molecular ion-atom collisions at cold temperaturesJul 11 2018We present a study of vibrational quenching and chemical processes of molecular ions immersed in an ultracold atomic gas by means of the quasi-classical trajectory (QCT) method. In particular, BaRb$^+(v)$ + Rb collisions are studied at cold temperatures ... More
Degenerate Poincaré-Sobolev inequalitiesMay 25 2018We study weighted Poincar\'e and Poincar\'e-Sobolev type inequalities with an explicit analysis on the dependence on the $A_p$ constants of the involved weights. We obtain inequalities of the form $$ \left (\frac{1}{w(Q)}\int_Q|f-f_Q|^{q}w\right )^\frac{1}{q}\le ... More
Anisotropic Weyl invarianceAug 31 2016May 29 2018We consider a non-relativistic free scalar field theory with a type of anisotropic scale invariance in which the number of coordinates "scaling like time" is generically greater than one. We propose the Cartesian product of two curved spaces, the metric ... More
A Grasp of IdentityNov 06 2014We revisit the treatment of identical particles in quantum mechanics. Two kinds of solutions of Schr\"{o}dinger equation are found and analyzed. First, the known symmetrized and antisymmetrized eigenfunctions. We examine how the very concept of particle ... More
Einstein's quantum theory of the monatomic ideal gas: non-statistical arguments for a new statisticsApr 30 2010In this article, we analyze the third of three papers, in which Einstein presented his quantum theory of the ideal gas of 1924-1925. Although it failed to attract the attention of Einstein's contemporaries and although also today very few commentators ... More
Towards exact symplectic integrators from Liouvillian formsSep 02 2015Dec 20 2015In this article we introduce a low order implicit symplectic integrator designed to follow the Hamiltonian flow as close as possible. This integrator is obtained by the method of Liouvillian forms proposed by the author in a previous work and does not ... More
Equivariant absolute extensor property on hyperspaces of convex setsJan 12 2014Feb 07 2014Let G be a compact group acting on a Banach space L by means of linear isometries. The action of G on L induces a natural continuous action on cc(L), the hyperspace of all compact convex subsets of L endowed with the Hausdorff metric topology. The main ... More
Mixed forward-backward stability of the two-level orthogonal Arnoldi method for quadratic problemsJul 04 2017We revisit the numerical stability of the two-level orthogonal Arnoldi (TOAR) method for computing an orthonormal basis of a second--order Krylov subspace associated with two given matrices. We show that the computed basis is close (on certain subspace ... More
The $L(\log L)^ε$ endpoint estimate for maximal singular integral operatorsMar 13 2015We prove in this paper the following estimate for the maximal operator $T^*$ associated to the singular integral operator $T$: $ \|T^*f\|_{L^{1,\infty}(w)} \lesssim \frac{1}{\epsilon} \int_{\mathbb{R}^n} |f(x)| M_{L(\log L)^{\epsilon}} (w)(x)dx$, for ... More