Results for "P. Berrutti"

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Low RF power plasma ignition and detection for in-situ cleaning of 1.3 GHz 9-cell cavitiesFeb 08 2019Superconducting Radio Frequency (SRF) cavities performance preservation is crucial, from vertical test to accelerator operation. Field Emission (FE) is still one of the performance limiting factors to overcome and plasma cleaning has been proven successful ... More
Vacuum energy sequestering and cosmic dynamicsOct 16 2014We explicitly compute the dynamics of closed homogeneous and isotropic universes permeated by a single perfect fluid with a constant equation of state parameter $w$ in the context of a recent reformulation of general relativity, proposed in [1], which ... More
On the cosmological evolution of alpha and mu and the dynamics of dark energyApr 22 2008We study the cosmological evolution of the fine structure constant, $\alpha$, and the proton-to-electron mass ratio, $\mu=m_p/m_e$, in the context of a generic class of models where the gauge kinetic function is a linear function of a quintessence-type ... More
Interacting dark energy: the role of microscopic feedback in the dark sectorFeb 09 2015Mar 10 2015We investigate the impact on the classical dynamics of dark matter particles and dark energy of a non-minimal coupling in the dark sector, assuming that the mass of the dark matter particles is coupled to a dark energy scalar field. We show that standard ... More
In medium T matrix for neutron matterApr 03 2002Jun 18 2002We calculate the equation of state of pure neutron matter, comparing the G-matrix calculation with the in-medium T-matrix result. At low densities, we obtain similar energies per nucleon, however some differences appear at higher densities. We use the ... More
Energy dependence of transverse quark flow in heavy ion collisionsJul 19 2004Energy dependence of quark transverse flow carries information about dynamical properties (equation of state, initial conditions) of deconfined matter produced in heavy ion collisions. We assume quark-antiquark matter formation in Pb+Pb collisions at ... More
D and J/psi production from deconfined matter in relativistic heavy ion collisionsAug 18 2000We study the production of the D and J/psi mesons from deconfined quark matter at CERN SPS energy. Using the MICOR microscopical coalescence model we determine the transverse momentum spectra of these charm mesons. We predict the slopes of their transverse ... More
Molecular Dipolar Crystals as High Fidelity Quantum Memory for Hybrid Quantum ComputingJun 20 2007We study collective excitations of rotational and spin states of an ensemble of polar molecules, which are prepared in a dipolar crystalline phase, as a candidate for a high fidelity quantum memory. While dipolar crystals are formed in the high density ... More
Single- and Two-Component GRB Spectra in the Fermi GBM-LAT Energy RangeFeb 13 2012Jun 04 2012Most Fermi GRB spectra appear as either a broken power law extending to GeV energies or as a broken power with a separate GeV power law component. Here we show that such spectra can be understood in terms of magnetically dominated relativistic jets where ... More
Impact of nuclear effects on the extraction of neutrino oscillation parametersJul 04 2013Dec 03 2013We study the possible impact of nuclear effects and final state interactions on the determination of the oscillation parameters due to mis-reconstruction of non-quasi-elastic events as quasi-elastic events at low energies. We analyze a $\nu_\mu$ disappearance ... More
Interlayer Exchange Coupling in (Ga,Mn)As-based SuperlatticesFeb 14 2005The interlayer coupling between (Ga,Mn)As ferromagnetic layers in all-semiconductor superlattices is studied theoretically within a tight-binding model, which takes into account the crystal, band and magnetic structure of the constituent superlattice ... More
Multiple partitions, lattice paths and a Burge-Bressoud-type correspondenceAug 31 2006Jan 15 2008A bijection is presented between (1): partitions with conditions $f_j+f_{j+1}\leq k-1$ and $ f_1\leq i-1$, where $f_j$ is the frequency of the part $j$ in the partition, and (2): sets of $k-1$ ordered partitions $(n^{(1)}, n^{(2)}, ..., n^{(k-1)})$ such ... More
The limiting behavior of the Liu-Yau quasi-local energyJun 07 2007The small- and large-sphere limits of the quasi-local energy recently proposed by Liu and Yau are carefully examined. It is shown that in the small-sphere limit, the non-vacuum limit of the Liu-Yau quasi-local energy approaches the expected value \frac{4\pi}{3} ... More
Non-Perturbative Superpotentials in F-theory and String DualityApr 07 2005May 12 2005We use open-closed string duality between F-theory on K3xK3 and type II strings on CY manifolds without branes to study non-perturbative superpotentials in generalized flux compactifications. On the F-theory side we obtain the full flux potential including ... More
Successive Injection of Opposite Magnetic Helicity in Solar Active Region NOAA 11928Nov 02 2016Understanding the nature and evolution of the photospheric helicity flux transfer is a key to reveal the role of magnetic helicity in coronal dynamics of solar active regions. Using SDO/HMI photospheric vector magnetograms and the derived flow velocity ... More
Charge multiplets and masses for E(11)May 28 2008Oct 30 2008The particle, string and membrane charge multiplets are derived in detail from the decomposition of the l1 (charge) representation of E(11) in three, four, five, six, seven and eight spacetime dimensions. A tension formula relating weights of the l1 (charge) ... More
Anisotropy-driven transition from collisionless to collisional regime in the dipolar modes of a trapped gaseous mixtureAug 30 2004Jan 27 2005We evaluate the dipolar oscillations of a harmonically trapped fermion gas containing thermal bosonic impurities as a function of the anisotropy of the trap, from the numerical solution of the Vlasov-Landau equations for the one-body phase-space distribution ... More
M-Theory Solutions in Multiple Signatures from E_11Jun 15 2005Oct 28 2005We generalise the previously given E_11 half BPS solution generating group element to general weights of A_10. We find that it leads to solutions of M-theory but in signatures (1,10), (2,9), (5,6), (6,5), (9,2) and (10,1). The signature transformations ... More
$π$-$K$ scattering lengths at finite temperature in the Nambu--Jona-Lasinio modelApr 14 1998The transition amplitude for $\pi K$ scattering is evaluated within the SU(3) Nambu--Jona-Lasinio model. Ordering terms according to the expansion in $1/N_c$ leads to a box-like diagram, $t$ channel diagrams that admit scalar isoscalar $(\sigma,\sigma')$ ... More
Addressing the spin question in gravitational-wave searches: Waveform templates for inspiralling compact binaries with nonprecessing spinsJul 06 2011Sep 12 2011This paper presents a post-Newtonian (PN) template family of gravitational waveforms from inspiralling compact binaries with non-precessing spins, where the spin effects are described by a single "reduced-spin" parameter. This template family, which reparametrizes ... More
Irreducible Tensor Operators and the Wigner-Eckart Theorem for Finite Magnetic GroupsNov 02 2009The transformation properties of irreducible tensor operators and the applicability of the Wigner-Eckart theorem to finite magnetic groups have been studied.
Third Order Perturbed Energy of Cobalt Ferrite Thick FilmsJul 08 2016Magnetic properties and easy axis orientation of cobalt ferrite films with applied magnetic field and number of layers were studied. According to our theoretical studies explained in this manuscript, the magnetically easy and hard directions of cobalt ... More
Theory of a Higher Order Phase Transition: Superconducting Transition in BKBOJul 15 2002Jun 24 2003We describe here the properties expected of a higher (with emphasis on the order fourth) order phase transition. The order is identified in the sense first noted by Ehrenfest, namely in terms of the temperature dependence of the ordered state free energy ... More
Experimental evidence of electrification processes at the 2009 LAquila earthquake mainshockJun 19 2015Two types of coseismic magnetic field events are simultaneously observed: transient offset events and magnetic field signal that occurred at the destructive, Mw6.1 LAquila earthquake (EQ) mainshock. The offset event, conventionally interpreted as a signature ... More
A Novel Algorithm for String Matching with MismatchesMar 10 2016We present an online algorithm to deal with pattern matching in strings. The problem we investigate is commonly known as string matching with mismatches in which the objective is to report the number of characters that match when a pattern is aligned ... More
Twistor Bundles, Einstein Equations and Real StructuresOct 27 1996We consider sphere bundles P and P' of totally null planes of maximal dimension and opposite self-duality over a 4-dimensional manifold equipped with a Weyl or Riemannian geometry. The fibre product PP' of P and P' is found to be appropriate for the encoding ... More
Theory Perspective: SCES '05 ViennaDec 19 2005Over the past decades, research into strongly correlated electron materials that has consistently outperformed our wildest expectations, with new discoveries and radically new theoretical insights. SCES '05 reaffirmed this vitality. Highlight areas included ... More
Adaptive Control of 4-DoF Robot manipulatorJan 02 2015In experimental robotics, researchers may face uncertainties in parameters of a robot manipulator that they are working with. This uncertainty may be caused by deviations in the manufacturing process of a manipulator, or changes applied to manipulator ... More
Continuum QCD and light mesonsSep 21 2000The ladder-rainbow truncation of the set of Dyson-Schwinger equations is used to study light mesons. The parameters in the effective interaction are constrained by the chiral condensate and f_\pi; the current quark masses are fitted to m_\pi and m_K. ... More
Diquark properties and their role in hadronsDec 15 2004Diquark correlations are important in baryons, which can be modeled as quark-diquark bound states. In addition, diquarks could play a role in non-standard hadrons such as tetraquarks and pentaquarks. Here, we obtain properties of these diquarks from the ... More
Calculating the critical exponents of the chiral phase transitionAug 23 1999We calculate the critical exponents of the chiral phase transition at nonzero temperature using the thermal and chiral susceptibilities. We show that within a class of confining Dyson-Schwinger equation (DSE) models the transition is mean field, and that ... More
The Influence of the Full Vertex and Vacuum Polarization on the Fermion Propagator in QED3Jun 04 1996We investigate the influence of the full vacuum polarization and vertex function on the fermion propagator, using the coupled Dyson--Schwinger equations for the photon and fermion propagator. We show that, within a range of vertex functions, the general ... More
A microscopic rotational cranking model and its connection to conventional cranking and other collective rotational modelsOct 26 2016Oct 31 2016A simple derivation from first principles of the conventional cranking model for nuclear collective rotation about a single axis and its coupling to intrinsic motion is given. The microscopic cranking model is derived by transforming the nuclear Schrodinger ... More
A trace formula for vector-valued modular formsNov 26 2012We present a formula for vector-valued modular forms, expressing the value of the Hilbert-polynomial of the module of holomorphic forms evaluated at specific arguments in terms of traces of representation matrices, restricting the weight distribution ... More
Is the quantum state (an) observable?Apr 16 1996We explore the sense in which the state of a physical system may or may not be regarded (an) observable in quantum mechanics. Simple and general arguments from various lines of approach are reviewed which demonstrate the following no-go claims: (1) the ... More
Borges Dilemma, Fundamental Laws, and Systems BiologySep 01 2007I reason here that the known folk law in biology that there is no general law in biology because of exceptions is false. The (quantitative) systems biology offers the potential to solve the Borges Dilemma, by transcending it. There have already a plenty ... More
Two years later--lessons from vortex dynamics in super mediaOct 26 2006Two years ago the reasons for resistance to the fundamental vortex dynamics in super media emerged in 1990's were analyzed (cond-mat/0407007). Five "mistakes" were identified to explain this resistance. Given the current tremendous interest in vortex ... More
Double Counting of `Chiral Anomaly' in a Model Study of Primordial BaryogenesisJan 08 1998In this comment to the Nature paper of Bevan et al I point out that their interpretation of experimental data is based on a double counting of the `chiral anomaly' due to a vortex motion: using the calculation far away from the vortex core (Berry phase) ... More
Nernst Effect, Seebeck Effect, and Vortex Dynamics in the Mixed State of SuperconductorsMay 01 1995Oct 08 1996Based on the vortex dynamics with the Magnus force and a two-fluid model we have derived a set of explicit expressions between the Nernst and Seebeck coefficients, and the Hall and longitudinal resistivities in the linear response regime of the mixed ... More
Global View of Bionetwork Dynamics: Adaptive LandscapeFeb 05 2009Quantifying the adaptive landscape in a given dynamical processes has been one of most important goals in theoretical biology. It can have immediate implications for many dynamical properties, such as robustness and plasticity. Based on recent work here ... More
Quantitative Resolution to some "Absolute Discrepancies" in Cancer Theories: a View from Phage lambda Genetic SwitchApr 03 2007Is it possible to understand cancer? Or more specifically, is it possible to understand cancer from genetic side? There already many answers in literature. The most optimistic one has claimed that it is mission-possible. Duesberg and his colleagues reviewed ... More
Is Adaptive Landscape in Biology a Metaphor or a Quantitative Concept? or Both?Mar 23 2007Some biologists accept Wright's adaptive landscape idea, believing it is one of most profound concepts in evolutionary dynamics. Some wouldn't, believing that "the idea that there is such a quantity remains one of the most widely held popular misconceptions ... More
Quantum Dynamics of Topological Singularities: Feynman's Influence Functional ApproachSep 27 1998Starting from the microscopic theory of Bardeen-Cooper-Schrieffer (BCS) for the fermionic superfluids, we show that the vortex dynamics can be followed naturally by extending Feynman's influence functional approach to incorporate the transverse force. ... More
Decay of the Maxwell field on the Schwarzschild manifoldOct 22 2007We study solutions of the decoupled Maxwell equations in the exterior region of a Schwarzschild black hole. In stationary regions, where the Schwarzschild coordinate $r$ ranges over $2M < r_1 < r < r_2$, we obtain a decay rate of $t^{-1}$ for all components ... More
Equation of state of dense matter and maximum mass of neutron starsJan 06 2003Theoretical models of the equation of state (EOS) of neutron-star matter (starting with the crust and ending at the densest region of the stellar core) are reviewed. Apart from a broad set of baryonic EOSs, strange quark matter, and even more exotic (abnormal ... More
Solid interiors of neutron stars and gravitational radiationMay 27 1996Contents: 1.Introduction 2. Formation and composition of the solid crust 3. The bottom layers of the crust: exotic nuclear shapes and topologies 4. Crust contribution to stellar mass and moment of inertia 5. Solid cores 6. Deformation, elastic strain ... More
A Serendipitous Deep Cluster Survey from ROSAT--PSPC pointed observationsSep 09 1995We present a deep X-ray selected sample of galaxy clusters which has been created from a serendipitous search in ROSAT-PSPC deep pointed observations at high galactic latitude. This survey, hereafter known as the ROSAT Deep Cluster Survey (RDCS), is being ... More
Coherent control and decoherence of charge states in quantum dotsJun 08 2007This Chapter contains a review of the recent results, both experimental and theoretical, related to optical control of carriers confined in semiconductor quantum dots. The physics of Rabi oscillations of exciton and biexciton occupations, as well as time-domain ... More
Stability of the nonlinear filter for slowly switching Markov chainsNov 26 2004Jul 17 2006Exponential stability of the nonlinear filtering equation is revisited, when the signal is a finite state Markov chain. An asymptotic upper bound for the filtering error due to incorrect initial condition is derived in the case of slowly switching signal. ... More
An R-matrix package for coupled-channel problems in nuclear physicsOct 13 2015We present an $R$-matrix Fortran package to solve coupled-channel problems in nuclear physics. The basis functions are chosen as Lagrange functions, which permits simple calculations of the matrix elements. The main input are the coupling potentials at ... More
Gamma-Ray BurstsMay 09 2006May 30 2006Gamma-ray bursts are the most luminous explosions in the Universe, and their origin and mechanism are the focus of intense research and debate. More than three decades after their discovery, and after pioneering breakthroughs from space and ground experiments, ... More
Origin of Gamma Ray BurstersDec 29 1999The successful discovery of X-ray, optical and radio afterglows of GRB has made possible the identification of host galaxies at cosmological distances. The energy release inferred in these outbursts place them among the most energetic and violent events ... More
Gamma-ray Burst Models: General Requirements and PredictionsFeb 21 1995Whatever the ultimate energy source of gamma-ray bursts turns out to be, the resulting sequence of physical events is likely to lead to a fairly generic, almost unavoidable scenario: a relativistic fireball that dissipates its energy after it has become ... More
Theories of GRB Early AfterglowJan 30 2006The rapid follow-up of gamma-ray burst (GRB) afterglows made possible by the multi-wavelength satellite Swift, launched in November 2004, has put under a microscope the GRB early post-burst behavior, This is leading to a significant reappraisal and expansion ... More
Theories of Gamma-Ray BurstsNov 08 2001Nov 21 2001The gamma ray burst phenomenon is reviewed from a theoretical point of view, with emphasis on the fireball shock scenario of the prompt emission and the longer wavelenght afterglow. Recent progress and issues are discussed, including spectral-temporal ... More
Semi-analytical homologous solutions of the gravo-magnetic contractionNov 10 2003We propose an extension of the semi-analytical solutions derived by Lin et al. (1965) describing the two-dimensional homologous collapse of a self-gravitating rotating cloud having uniform density and spheroidal shape, which includes magnetic field (with ... More
Self-similar condensation of rotating magnetized self-gravitating isothermal filamentsOct 18 2002Ordinary differential equations describing the self-similar collapse of a rotating, magnetized, self-gravitating and isothermal filament are derived. Explicit homologous solutions are studied with special emphasis on the bifurcation that occurs at the ... More
The W_k structure of the Z_k^(3/2) modelsJun 04 2009Generalized Z_k^(r/2) parafermionic theories - characterized by the dimension (r/2)(1-1/k) of the basic parafermionic field - provide potentially interesting quantum-Hall trial wavefunctions. Such wavefunctions reveal a W_k structure. This suggests the ... More
Spectropolarimetry of cool starsMar 27 2007In recent years, the development of spectropolarimetric techniques deeply modified our knowledge of stellar magnetism. In the case of solar-type stars, the challenge is to measure a geometrically complex field and determine its evolution over very different ... More
Low-Energy Direct Capture in the 16O(alpha,gamma)20Ne ReactionJul 28 2005The cross section of the 16O(a,g)20Ne capture reaction is analyzed at low energies where the direct capture mechanism is dominant. For temperatures below T9 = 0.2 the resulting astrophysical reaction rate is about a factor of two higher than in a recent ... More
Multi-Periodic Oscillations in Cepheids and RR Lyrae-Type StarsAug 21 2012Classical Cepheids and RR Lyrae-type stars are usually considered to be textbook examples of purely radial, strictly periodic pulsators. Not all the variables, however, conform to this simple picture. In this review I discuss different forms of multi-periodicity ... More
Fitting galaxy spectra with STECKMAP: a user guideAug 23 2011STECKMAP stands for STEllar Content and Kinematics via Maximum A Posteriori likelihood. It is a tool for interpreting galaxy spectra in terms of their stellar populations, through the derivation of their star formation history, age-metallicity relation, ... More
Block-Spin Approach to Electron CorrelationsJun 30 1997We consider an expansion of the ground state wavefunction of quantum lattice many-body systems in a basis whose states are tensor products of block-spin wavefunctions. We demonstrate by applying the method to the antiferromagnetic spin-1/2 chain that ... More
Review on top forward-backward asymmetryJan 08 2013The top forward-backward asymmetry (FBA) observed at the Tevatron has been a hot issue in particle physics for the last few years. In this talk, I describe two different approaches for the top FBA at the Tevatron, one in effective field theory (EFT) approach ... More
SUSY CP violations in K and B systemsApr 17 2001I report our recent works on the effects of % flavor conserving CP violating phases in SUSY models on B and K phenomenology.
Color-octet mechanism in J/psi productionsAug 21 1996Aug 27 1996I review recent developments in theoretical understandings of J/psi productions in various processes at Tevatron, B decay and J/psi photoproduction including the color-octet mechanism.
On the neutron star-disc interaction in Be/X-ray binariesMar 05 2007We have investigated the long-term X-ray variability, defined as the root-mean-square (rms) of the ASM RXTE light curves, of a set of galactic Be/X-ray binaries and searched for correlations with system parameters, such as the spin period of the neutron ... More
Theory of Semi-- and Nonleptonic Decays of Heavy MesonsSep 07 1994I review some of the recent developments in the theoretical description of weak inclusive decays of heavy mesons. The topics cover the value of $|V_{cb}|$ as extracted from semileptonic inclusive decays and a short discussion of the theoretical errors. ... More
Finite Mass Corrections to Leptonic Decay Constants in the Heavy Quark Effective TheoryDec 22 1993We calculate finite mass corrections to leptonic decay constants in HQET using QCD sum rules. The results are given to two--loop accuracy including renormalization group analysis. The contribution of unknown two--loop anomalous dimension matrix--elements ... More
A refined factorization of the exponential lawMay 21 2010May 10 2011Let $\xi$ be a (possibly killed) subordinator with Laplace exponent $\phi$ and denote by $I_{\phi}=\int_0^{\infty}\mathrm{e}^{-\xi_s}\,\mathrm{d}s$, the so-called exponential functional. Consider the positive random variable $I_{\psi_1}$ whose law, according ... More
Of Decoherent Electrons and Disordered ConductorsMay 13 2002This lecture note reviews a variety of transport and thermodynamic measurements of electron decoherence time in low-dimensional conductors at low temperature. The mechanism of dephasing by electron interaction mediated by an arbitrarily small number of ... More
Note on the Mass Square of the Eta' MesonNov 24 1997We propose to use as a mathematical tool to study the mass square of the etaprime meson an infinitely heavy supplementary quark flavor Q. This is understood in the framework of QCD with one light quark flavor (or n_fl light flavors) and the gauge group ... More
Deacay and scattering amplitudes are not the sameAug 24 1998We study the lowest lying $\pi^+ \pi^-$ resonance R, bound by the long range Coulomb potential and destabilized by short range strong interactions mediating the dominant decay into two neutral pions. Parametrizing the corresponding partial decay width ... More
Semileptonic B decays and the inclusive determination of |V(ub)|Dec 04 2007We present a new theoretical framework for the study of $B\to X_u \ell \nu$ decays, which includes all known perturbative and non-perturbative contributions and a description of leading and subleading Fermi motion effects. The perturbative and non-perturbative ... More
The distribution of spacings between quadratic residues, IIDec 08 1998We study the distribution of spacings between squares modulo q as the number of prime divisors of q tends to infinity. In an earlier paper Kurlberg and Rudnick proved that the spacing distribution for square free q is Poissonian, this paper extends the ... More
Phase coexistence and interrupted 1st order transition in magnetic shape memory alloysJun 03 2014Current theoretical studies on structural and magnetic properties of functional Ni-Mn-Z (Z = Ga, In, Sn) Heusler alloys address the origin of the structural transition from the austenite to martensite, and also address the dominant contribution to the ... More
Quantum noise memory effect of multiple scattered lightJun 30 2005We investigate frequency correlations in multiple scattered light that are present in the quantum fluctuations. The memory effect for quantum and classical noise is compared, and found to have markedly different frequency scaling, which was confirmed ... More
Prospects for F_L^D Measurements at HERA-IINov 22 2005The theoretical interest in the longitudinal diffractive structure function F_L^D is briefly motivated and possible measurement methods are surveyed. A simulation based on realistic scenarios with a reduced proton beam energy at HERA-II using the H1 apparatus ... More
Kinetics of Oscillating NeutrinosMay 08 2005May 12 2005In the context of core-collapse supernovae, Strack and Burrows (Phys. Rev. D 71, 093004 (2005)) have recently developed an extension of the classical Boltzmann kinetic formalism that retains all the standard neutrino oscillation phenomenology, including ... More
Evolution of AGB stars at varying surface C/O ratio: The crucial effect of molecular opacitiesDec 11 2002This study calls attention to the importance of properly coupling the molecular opacities to the actual surface abundances of TP-AGB stars that experience the third dredge-up and/or hot-bottom burning, i.e. with surface abundances of carbon and oxygen ... More
Time development of a density perturbation in the unstable nuclear matterMar 21 1996Jun 11 1996We present the solution of the time development of an unstable initial density perturbation in the linearized Vlasov equation, completing the previous analysis in the literature. The additional contributions found are usually damped and can be neglected ... More
Superfluidity with dressed nucleonsFeb 14 2002Jul 09 2002The gap equation with dressed propagators is solved in symmetric nuclear matter. Nucleon self-energies are obtained within the self-consistent in medium T matrix approximation. The off-shell gap equation is compared to an effective quasiparticle gap equation ... More
Renormalization and lattice artifactsApr 20 2010Lectures given at the Summer School on "Modern perspectives in lattice QCD", Les Houches, August 3-28, 2009
Vaccination pattern affects immunological responseJul 03 2004The response of the immune system to different vaccination patterns is studied with a simple model. It is argued that the history and characteristics of the pattern defines very different secondary immune responses in the case of infection. The memory ... More
The Dimensional-Reduction Anomaly in Spherically Symmetric SpacetimesMar 31 2000Apr 30 2000In D-dimensional spacetimes which can be foliated by n-dimensional homogeneous subspaces, a quantum field can be decomposed in terms of modes on the subspaces, reducing the system to a collection of (D-n)-dimensional fields. This allows one to write bare ... More
Diffusion process in a deterministically forced flowOct 02 1997We analyze circumstances under which the microscopic dynamics of particles which are driven by a forced, gradient-type flow can be consistently interpreted as a Markovian diffusion process. Special attention is paid to discriminating between forces that ... More
Nucleon correlations and Higher Twist effects in nuclear structure functionsDec 13 2004The overlap of the nucleons in nuclei plays an important role in understanding the nuclear dependence of deep inelastic scattering data. It is shown that the nuclear modification of the higher twist scale can be essentially determined by the overlapping ... More
Induction of Hamiltonian Poisson actionsDec 11 2000We propose a Poisson-Lie analog of the symplectic induction procedure, using an appropriate Poisson generalization of the reduction of symplectic manifolds with symmetry. Having as basic tools the equivariant momentum maps of Poisson actions, the double ... More
Gas Shepherding by an Infalling SatelliteJan 14 2008May 22 2008I calculate the action of a satellite, infalling through dynamical friction, on a coplanar gaseous disk of finite radial extent. The disk tides, raised by the infalling satellite, couple the satellite and disk. Dynamical friction acting on the satellite ... More
Dust in elliptical galaxies: a new dust massSep 11 1998In order to investigate the nature and origin of dust in elliptical galaxies, a method for the dust mass evaluation, which accounts for the dust temperature distribution, is here presented and discussed. The derived dust masses turn out to be a factor ... More
Searches for Neutral Higgs Boson and Interpretations in the MSSM at LEPJan 09 2004Jan 26 2004This paper discusses recent publications of the LEP collaborations DELPHI, L3 and OPAL on searches for Higgs bosons motivated by MSSM scenarios as well as their interpretation in the MSSM. With the final publication of the LEP collaborations available ... More
Hubbard Model with Lüscher fermionsMar 08 1997We study the basic features of the two-dimensional quantum Hubbard Model at half-filling by means of the L\"uscher algorithm and the algorithm based on direct update of the determinant of the fermionic matrix. We implement the L\"uscher idea employing ... More
Hubbard Model and Luscher fermionsOct 09 1996Oct 22 1996We discuss numerical complexity of the L\"uscher algorithm applied to the Hubbard Model. In particular we present comparison to a certain algorithm based on direct computation of the fermionic determinant.
On Simplest Hamiltonian SystemsAug 20 1996Simple Hamiltonian systems, such as mathematical pendulum or Euler equations for rigid body, are solved without computation. It is nothing but a joke but maybe you will find it nice.
Power Management during Scan Based Sequential Circuit TestingJun 02 2011This paper shows that not every scan cell contributes equally to the power consumption during scan based test. The transitions at some scan cells cause more toggles at the internal signal lines of a circuit than the transitions at other scan cells. Hence ... More
A study of the gamma* - f0(980) transition form factorsOct 04 2016The spin wave function of the f0(980)-meson is constructed under the assumption that the meson is dominantly a quark-antiquark state. This wave function is used in a calculation of the gamma* - f0 transition form factors. In the real-photon limit the ... More
Ginsparg-Wilson fermions: practical aspects and applicationsOct 30 2001I review recent progress in the implementation of lattice fermions satisfying the Ginsparg-Wilson relation and some physical applications.
Tensionless p-branes with manifest conformal invarianceFeb 10 1997The quantization of the tensionless p-brane is discussed. Inspection of the constraint algebra reveals that the central extensions for the p-branes have a simple form. Using a Hamiltonian BRST scheme we find that the quantization is consistent in any ... More
Orbital evolution under the action of fast interstellar gas flow with non-constant drag coefficientMar 04 2012Jul 06 2012The acceleration of a spherical dust particle caused by an interstellar gas flow depends on the drag coefficient which is, for the given particle and flow of interstellar gas, a specific function of the relative speed of the dust particle with respect ... More
Error of semiclassical eigenvalues in the semiclassical limit - An asymptotic analysis of the Sinai billiardDec 09 1998We estimate the error in the semiclassical trace formula for the Sinai billiard under the assumption that the largest source of error is due to Penumbra diffraction, that is diffraction effects for trajectories passing within a distance R O((kR)^(-2/3) ... More