Results for "Jeremy M. Wachter"

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Predicting the Influence of Plate Geometry on the Eddy Current PendulumJun 21 2015We quantitatively analyze a familiar classroom demonstration, Van Waltenhofen's eddy current pendulum, to predict the damping effect for a variety of plate geometries from first principles. Results from conformal mapping, finite element simulations and ... More
Gravitational back-reaction near cosmic string kinks and cuspsAug 24 2018Aug 31 2018We find the leading-order effect of gravitational back-reaction on cosmic strings for points near kinks and cusps. Near a kink, the effect diverges as the inverse cube root of the distance to the kink, and acts in a direction transverse to the worldsheet. ... More
Racetrack Potentials and the de Sitter Swampland ConjecturesNov 13 2018Jan 15 2019We show that one can find de Sitter critical points (saddle points) in models of flux compactification of Type IIB String Theory without any uplifting terms and in the presence of several moduli. We demonstrate this by giving explicit examples following ... More
New Results for Two Optically Faint Low Mass X-Ray Binary SystemsSep 04 1997We present optical photometry of the low mass X-ray binary systems GX 349+2 and Ser X-1. Extensive VRI photometry of the faint optical counterpart (V=18.4) to GX 349+2 reveals a period of 22.5 +/- 0.1 h and half-amplitude 0.2 mag. This result confirms ... More
Spitzer Space Telescope Observations of Low Mass X-ray BinariesApr 09 2008We present preliminary results from our archival Spitzer Space Telescope program aimed at characterizing the mid-IR properties of compact objects, both isolated and in binary systems, i.e. white dwarfs, X-ray binaries, cataclysmic variables, and magnetars. ... More
Quantum kinematics on q-deformed quantum spaces I, Mathematical FrameworkDec 20 2006The aim of these two papers (I and II) is to try to give fundamental concepts of quantum kinematics to q-deformed quantum spaces. Paper I introduces the relevant mathematical concepts. A short review of the basic ideas of q-deformed analysis is given. ... More
Braided products for quantum spacesSep 11 2005Attention is focused on quantum spaces of physical importance, i.e. Manin plane, q-deformed Euclidean space in three or four dimensions as well as q-deformed Minkowski space. There are algebra isomorphisms that allow to identify quantum spaces with commutative ... More
Noncommutative Plurisubharmonic Polynomials Part II: Local AssumptionsDec 30 2010Jan 14 2011We say that a symmetric noncommutative polynomial in the noncommutative free variables (x_1, x_2, ..., x_g) is noncommutative plurisubharmonic on a noncommutative open set if it has a noncommutative complex hessian that is positive semidefinite when evaluated ... More
Gravitational smoothing of kinks on cosmic string loopsSep 01 2016Sep 08 2016We analyze the effect of gravitational back reaction on cosmic string loops with kinks, which is an important determinant of the shape, and thus the potential observability, of string loops which may exist in the universe today. Kinks are not rounded ... More
Electromagnetic back-reaction from currents on a straight stringMay 08 2014Jul 07 2014Charge carriers moving at the speed of light along a straight, superconducting cosmic string carry with them a logarithmically divergent slab of electromagnetic field energy. Thus no finite local input can induce a current that travels unimpeded to infinity. ... More
Gravitational back reaction on piecewise linear cosmic string loopsSep 06 2016We calculate the metric and affine connection due to a piecewise linear cosmic string loop, and the effect of gravitational back reaction for the Garfinkle-Vachaspati loop with four straight segments. As expected, back reaction reduces the size of the ... More
A Possible Period for the K-band Brightening Episodes of GX 17+2Jul 24 2009The low mass X-ray binary and Z source GX 17+2 undergoes infrared K-band brightening episodes of at least 3.5 magnitudes. The source of these episodes is not known. Prior published K-band magnitudes and new K-band measurements acquired between 2006 and ... More
A Chandra observation of the neutron star X-ray transient and eclipsing binary MXB 1659-29 in quiescenceJul 03 2002Jul 08 2003After almost 2.5 years of actively accreting, the neutron star X-ray transient and eclipsing binary MXB 1659-29 returned to quiescence in 2001 September. We report on a Chandra observation of this source taken a little over a month after this transition. ... More
Infrared Candidates for the Intense Galactic X-ray Source GX 17+2May 14 1999We present new astrometric solutions and infrared Hubble Space Telescope observations of GX 17+2 (X1813-140), one of the brightest X-ray sources on the celestial sphere. Despite 30 years of intensive study, and the existence of a strong radio counterpart ... More
Optical imaging of strain in two-dimensional crystalsMar 07 2019Strain engineering is widely used in material science to tune the (opto-)electronic properties of materials and enhance the performance of devices. Two-dimensional atomic crystals are a versatile playground to study the influence of strain, as they can ... More
Testing grain-surface chemistry in massive hot-core regionsFeb 02 2007Feb 12 2007A partial submillimeter line-survey was performed toward 7 high-mass young stellar objects (YSOs) aimed at detecting H2CO, CH3OH, CH2CO, CH3CHO, C2H5OH, HCOOH, HNCO and NH2CHO. In addition, other organic species such as CH3CN have been observed. The aim ... More
Dissipating the Langevin equation in the presence of an external stochastic potentialJan 13 2005In the Langevin formalism, the delicate balance maintained between the fluctuations in the system and their corresponding dissipation may be upset by the presence of a secondary, space-dependent stochastic force, particularly in the low friction regime. ... More
Machine Learning at ScaleFeb 25 2014It takes skill to build a meaningful predictive model even with the abundance of implementations of modern machine learning algorithms and readily available computing resources. Building a model becomes challenging if hundreds of terabytes of data need ... More
The hyperfine energy levels of alkali metal dimers: ground-state homonuclear molecules in magnetic fieldsOct 27 2008We investigate the hyperfine energy levels and Zeeman splittings for homonuclear alkali-metal dimers in low-lying rotational and vibrational states, which are important for experiments designed to produce quantum gases of deeply bound molecules. We carry ... More
On the interaction of NH($X^{3}Σ^{-}$) molecules with rubidium atoms: implications for sympathetic cooling and the formation of extremely polar moleculesJul 18 2003Jul 21 2003The Rb-NH interaction is investigated as a prototype for interactions between alkali metal atoms and stable molecules. For spin-aligned Rb and NH that interact on a quartet surface ($^4A''$), the interaction is relatively weak, with a well depth of 0.078 ... More
Molecular collisions in ultracold atomic gasesOct 24 2006It has recently become possible to form molecules in ultracold gases of trapped alkali metal atoms. Once formed, the molecules may undergo elastic, inelastic and reactive collisions. Inelastic and reactive collisions are particularly important because ... More
Zero Modes for the D=11 Membrane and Five-BraneOct 10 1995Apr 05 1996There exist extremal p-brane solutions of $D\!=\!11$ supergravity for p=2~and~5. In this paper we investigate the zero modes of the membrane and the five-brane solutions as a first step toward understanding the full quantum theory of these objects. It ... More
Photometry of GX 349+2: Evidence for a 22-hour PeriodAug 19 1996The intense galactic X-ray source GX 349+2 (Sco X-2) belongs to the class of persistently bright low-mass X-ray binaries called Z-sources. GX 349+2, although observed in X-rays for more than 30 years, has only recently been optically identified with a ... More
Gravitational backreaction simulations of simple cosmic string loopsMar 14 2019We present the results of computational gravitational backreaction on simple models of cosmic string loops. These results give us insight into the general behavior of cusps and kinks on loops, in addition to other features of evolution. Kinks are rounded ... More
Stability and Complexity of Minimising Probabilistic AutomataApr 26 2014May 01 2014We consider the state-minimisation problem for weighted and probabilistic automata. We provide a numerically stable polynomial-time minimisation algorithm for weighted automata, with guaranteed bounds on the numerical error when run with floating-point ... More
Radio detections of the neutron star X-ray binaries 4U 1820-30 and Ser X-1 in soft X-ray statesFeb 25 2004We present the analysis of simultaneous X-ray (RXTE) and radio (VLA) observations of two atoll-type neutron star X-ray binaries: 4U 1820-30 and Ser X-1. Both sources were steadily in the soft (banana) X-ray state during the observations. We have detected ... More
Cool Companions to White Dwarfs from the 2MASS Second Incremental Data ReleaseDec 06 2002We present near-infrared magnitudes for all white dwarfs (selected from the catalog of McCook & Sion) contained in the 2 Micron All Sky Survey Second Incremental Data Release(2MASS 2IDR). We show that the near-IR color-color diagram is an effective means ... More
Reactions between cold methyl halide molecules and alkali-metal atomsOct 16 2013Nov 14 2013We investigate the potential energy surfaces and activation energies for reactions between methyl halide molecules CH$_{3}X$ ($X$ = F, Cl, Br, I) and alkali-metal atoms $A$ ($A$ = Li, Na, K, Rb) using high-level {\it ab initio} calculations. We examine ... More
Degree-correlation, robustness, and vulnerability in finite scale-free networksJun 28 2016Feb 15 2017Many naturally occurring networks have a power-law degree distribution as well as a non-zero degree correlation. Despite this, most studies analyzing the robustness to random node-deletion and vulnerability to targeted node-deletion have concentrated ... More
Cosmic Rays from Gamma Ray Bursts in the GalaxyApr 06 2005Jun 16 2005The rate of terrestrial irradiation events by galactic gamma-ray bursts (GRBs) is estimated using recent standard-energy results. We assume that GRBs accelerate high-energy cosmic rays, and present results of three-dimensional simulations of cosmic rays ... More
Ultracold hydrogen atoms: a versatile coolant to produce ultracold moleculesMay 27 2013Oct 19 2013We show theoretically that ultracold hydrogen atoms have very favorable properties for sympathetic cooling of molecules to microkelvin temperatures. We calculate the potential energy surfaces for spin-polarized interactions of H atoms with the prototype ... More
The prospects of forming ultracold molecules in $^2Σ$ states by magnetoassociation of alkali-metal atoms with YbApr 29 2013We explore the feasibility of producing ultracold diatomic molecules with nonzero electric and magnetic dipole moments by magnetically associating two atoms, one with zero electron spin and one with nonzero spin. Feshbach resonances arise through the ... More
Multichannel Quantum Defect Theory for cold molecular collisions with a strongly anisotropic potential energy surfaceDec 20 2012We show that multichannel quantum defect theory (MQDT) can be applied successfully as an efficient computational method for cold molecular collisions in Li+NH, which has a deep and strongly anisotropic interaction potential. In this strongly coupled system, ... More
Production of ultracold NH molecules by sympathetic cooling with MgJun 29 2009Jun 30 2009We carry out calculations on $M$-changing collisions of NH ($^3\Sigma^-$) molecules in magnetically trappable states using a recently calculated potential energy surface. We show that elastic collision rates are much faster than inelastic rates for a ... More
Deviations from Born-Oppenheimer mass scaling in spectroscopy and ultracold molecular physicsAug 06 2016We investigate Born-Oppenheimer breakdown (BOB) effects (beyond the usual mass scaling) for the electronic ground states of a series of homonuclear and heteronuclear alkali-metal diatoms, together with the Sr$_2$ and Yb$_2$ diatomics. Several widely available ... More
An $H$ theorem for Boltzmann's equation for the Yard-Sale Model of asset exchangeDec 23 2014In recent work, Boltzmann and Fokker-Planck equations were derived for the "Yard-Sale Model" of asset exchange. For the version of the model without redistribution, it was conjectured, based on numerical evidence, that the time-asymptotic state of the ... More
Binary companions of evolved stars in APOGEE DR14: Orbital circularizationApr 18 2018Short-period binary star systems dissipate orbital energy through tidal interactions that lead to tighter, more circular orbits. When at least one star in a binary has evolved off of the main sequence, orbital circularization occurs for longer-period ... More
Mode-Locking Hysteresis in the Globally Coupled Model of Charge-Density WavesFeb 15 1994We study the response of a recently proposed global coupling model of charge-density waves to a joint ac+dc drive. The model is the standard Fukuyama-Lee-Rice model with an additional global coupling term to account for interaction with (uncondensed) ... More
MOLSCAT: a program for non-reactive quantum scattering calculations on atomic and molecular collisionsNov 23 2018Mar 14 2019MOLSCAT is a general-purpose program for quantum-mechanical calculations on nonreactive atom-atom, atom-molecule and molecule-molecule collisions. It constructs the coupled-channel equations of atomic and molecular scattering theory, and solves them by ... More
A Deep Face Identification Network Enhanced by Facial Attributes PredictionApr 20 2018In this paper, we propose a new deep framework which predicts facial attributes and leverage it as a soft modality to improve face identification performance. Our model is an end to end framework which consists of a convolutional neural network (CNN) ... More
A Cessation of X-ray Dipping Activity in X1254-690Jul 23 1999We present results from a campaign of simultaneous X-ray and optical observations of X1254-690 conducted using the Rossi X-ray Timing Explorer and the CTIO 1.5m telescope. We find that the usually-observed deep X-ray dipping is not seen during the times ... More
Optical Studies of the Transient Dipping X-ray Sources X1755-338 and X1658-298 in QuiescenceFeb 03 1998Feb 04 1998We have studied the optical counterparts of X1755-338 and X1658-298 in their X-ray "off" states. The first observations of X1755-338 in quiescence show that the counterpart, V4134 Sgr, has faded by more than 3.5 mag in V. If the mass donor in the system ... More
List Decoding of Locally Repairable CodesJan 12 2018May 08 2018We show that locally repairable codes (LRCs) can be list decoded efficiently beyond the Johnson radius for a large range of parameters by utilizing the local error correction capabilities. The new decoding radius is derived and the asymptotic behavior ... More
Silicon microcavity arrays with open access and a finesse of half a millionJan 16 2019Optical resonators are increasingly important tools in science and technology. Their applications range from laser physics, atomic clocks, molecular spectroscopy, and single-photon generation to the detection, trapping and cooling of atoms or nano-scale ... More
Fast Operations on Linearized Polynomials and their Applications in Coding TheoryDec 21 2015Jul 11 2017This paper considers fast algorithms for operations on linearized polynomials. We propose a new multiplication algorithm for skew polynomials (a generalization of linearized polynomials) which has sub-quadratic complexity in the polynomial degree $s$, ... More
Fast Operations on Linearized Polynomials and their Applications in Coding TheoryDec 21 2015This paper considers fast algorithms for operations on linearized polynomials. Among these results are fast algorithms for division of linearized polynomials, $q$-transform, multi-point evaluation, computing minimal subspace polynomials and interpolation. ... More
Vector Network Coding Based on Subspace Codes Outperforms Scalar Linear Network CodingDec 20 2015May 15 2016This paper considers vector network coding solutions based on rank-metric codes and subspace codes. The main result of this paper is that vector solutions can significantly reduce the required field size compared to the optimal scalar linear solution ... More
The planetary nebula Abell 48 and its [WN] nucleusJan 17 2013Mar 06 2014We have conducted a detailed multi-wavelength study of the peculiar nebula Abell 48 and its central star. We classify the nucleus as a helium-rich, hydrogen-deficient star of type [WN4-5]. The evidence for either a massive WN or a low-mass [WN] interpretation ... More
The WIRED Survey I: A Bright IR Excess Due to Dust Around the Heavily Polluted White Dwarf GALEX J193156.8+011745Dec 22 2010With the launch of the Wide-Field Infrared Survey Explorer (WISE), a new era of detecting planetary debris around white dwarfs has begun with the WISE InfraRed Excesses around Degenerates (WIRED) Survey. The WIRED Survey will be sensitive to substellar ... More
Modeling Multi-Wavelength Stellar Astrometry. I. SIM Lite Observations of Interacting BinariesMay 21 2010Interacting binaries consist of a secondary star which fills or is very close to filling its Roche lobe, resulting in accretion onto the primary star, which is often, but not always, a compact object. In many cases, the primary star, secondary star, and ... More
Ab initio potential energy surfaces, bound states and electronic spectrum of the Ar-SH complexOct 11 2006New ab initio potential energy surfaces for the doublet pi ground electronic state of the Ar-SH complex are presented, calculated at the RCCSD(T)/aug-cc-pV5Z level. Weakly bound rotation-vibration levels are calculated using coupled-channel methods that ... More
Atomic Clock Measurements of Quantum Scattering Phase Shifts Spanning Feshbach Resonances at Ultralow FieldsAug 11 2017We use an atomic fountain clock to measure quantum scattering phase shifts precisely through a series of narrow, low-field Feshbach resonances at average collision energies below $1\,\mu$K. Our low spread in collision energy yields phase variations of ... More
How to Fool Radiologists with Generative Adversarial Networks? A Visual Turing Test for Lung Cancer DiagnosisOct 26 2017Jan 09 2018Discriminating lung nodules as malignant or benign is still an underlying challenge. To address this challenge, radiologists need computer aided diagnosis (CAD) systems which can assist in learning discriminative imaging features corresponding to malignant ... More
Certified Adversarial Robustness via Randomized SmoothingFeb 08 2019Recent work has shown that any classifier which classifies well under Gaussian noise can be leveraged to create a new classifier that is provably robust to adversarial perturbations in L2 norm. However, existing guarantees for such classifiers are suboptimal. ... More
Free Radicals in Superfluid Liquid Helium Nanodroplets: A Pyrolysis Source for the Production of Propargyl RadicalAug 08 2006An effusive pyrolysis source is described for generating a continuous beam of radicals under conditions appropriate for the helium droplet pick-up method. Rotationally resolved spectra are reported for the $\nu_1$ vibrational mode of the propargyl radical ... More
A New Way to Conserve Total Energy for Eulerian Hydrodynamic Simulations with Self-GravityAug 08 2012Oct 01 2012We propose a new method to conserve the total energy to round-off error in grid-based codes for hydrodynamic simulations with self-gravity. A formula for the energy flux due to the work done by the the self-gravitational force is given, so the change ... More
Critical groups of simplicial complexesJan 20 2011Feb 28 2011We generalize the theory of critical groups from graphs to simplicial complexes. Specifically, given a simplicial complex, we define a family of abelian groups in terms of combinatorial Laplacian operators, generalizing the construction of the critical ... More
Minimum energetic cost to maintain a target nonequilibrium stateMar 14 2017In the absence of external driving, a system exposed to thermal fluctuations will relax to equilibrium. However, the constant input of work makes it possible to counteract this relaxation, and maintain the system in a nonequilibrium steady state. In this ... More
Modulus and Poincaré inequalities on non-self-similar Sierpinski carpetsJan 17 2012Feb 01 2013A carpet is a metric space homeomorphic to the Sierpinski carpet. We characterize, within a certain class of examples, non-self-similar carpets supporting curve families of nontrivial modulus and supporting Poincar\'e inequalities. Our results yield new ... More
Conformal surface embeddings and extremal lengthJul 19 2015May 03 2017Given two Riemann surfaces with boundary and a homotopy class of topological embeddings between them, there is a conformal embedding in the homotopy class if and only if the extremal length of every simple multi-curve is decreased under the embedding. ... More
The Origin of the Metal-Poor Common Proper Motion Pair HD 134439/134440: Insights from New Elemental AbundancesOct 31 2014The low [alpha/Fe] ratio in the metal-poor ([Fe/H]= -1.50) common proper motion pair HD 134439 and HD 134440 has been variously attributed to chemical evolution in an extragalactic environment with an irregular star formation history, planetessimal accretion, ... More
Optimizing and Evaluating Transient Gradual TypingFeb 20 2019Gradual typing enables programmers to combine static and dynamic typing in the same language. However, ensuring a sound interaction between the static and dynamic parts can incur significant runtime cost. In this paper, we perform a detailed performance ... More
A systematic analysis of star cluster disruption by tidal shocks -- I. Controlled N-body simulations and a new theoretical modelNov 30 2018May 07 2019Understanding the evolution of stellar clusters in an evolving tidal field is critical for studying the disruption of stellar clusters in a cosmological context. We systematically characterise the response of stellar clusters to tidal shocks using controlled ... More
A high-resolution infrared spectroscopic investigation of the halogen atom-HCN entrance channel complexes solvated in superfluid helium dropletsOct 06 2006Rotationally resolved infrared spectra are reported for the X-HCN (X = Cl, Br, I) binary complexes solvated in helium nanodroplets. These results are directly compared with that obtained previously for the corresponding X-HF complexes [J. M. Merritt, ... More
Simplicial and Cellular TreesJun 22 2015Much information about a graph can be obtained by studying its spanning trees. On the other hand, a graph can be regarded as a 1-dimensional cell complex, raising the question of developing a theory of trees in higher dimension. As observed first by Bolker, ... More
Cuts and flows of cell complexesJun 27 2012Sep 30 2014We study the vector spaces and integer lattices of cuts and flows associated with an arbitrary finite CW complex, and their relationships to group invariants including the critical group of a complex. Our results extend to higher dimension the theory ... More
Bounds and Constructions for Multi-Symbol Duplication Error Correcting CodesJul 08 2018Sep 19 2018In this paper, we study codes correcting $t$ duplications of $\ell$ consecutive symbols. These errors are known as tandem duplication errors, where a sequence of symbols is repeated and inserted directly after its original occurrence. Using sphere packing ... More
The ionized gas in the central region of NGC 5253: 2D mapping of the physical and chemical propertiesJun 11 2012ABRIDGED: NGC5253 was previously studied by our group with the aim to elucidate in detail the starburst interaction processes. Some open issues regarding the 2D structure of the main properties of the ionized gas remain to be addressed. Using IFS data ... More
Long range intermolecular forces in triatomic systems: connecting the atom-diatom and atom-atom-atom representationsMay 19 2005The long-range forces that act between three atoms are analysed in both atom-diatom and atom-atom-atom representations. Expressions for atom-diatom dispersion coefficients are obtained in terms of 3-body nonadditive coefficients. The anisotropy of atom-diatom ... More
Compressed Sensing and Reconstruction of Unstructured Mesh DatasetsAug 25 2015Exascale computing promises quantities of data too large to efficiently store and transfer across networks in order to be able to analyze and visualize the results. We investigate Compressive Sensing (CS) as a way to reduce the size of the data as it ... More
Quasiconformal mappings that highly distort dimensions of many parallel linesJan 26 2016We construct a quasiconformal mapping of $n$-dimensional Euclidean space, $n \geq 2$, that simultaneously distorts the Hausdorff dimension of a nearly maximal collection of parallel lines by a given amount. This answers a question of Balogh, Monti, and ... More
Double Threshold DigraphsFeb 21 2017Jun 26 2018A semiorder is a model of preference relations where each element $x$ is associated with a utility value $\alpha(x)$, and there is a threshold $t$ such that $y$ is preferred to $x$ iff $\alpha(y) > \alpha(x)+t$. These are motivated by the notion that ... More
Trapped-Ion Quantum Computing: Progress and ChallengesApr 08 2019Trapped ions are among the most promising systems for practical quantum computing (QC). The basic requirements for universal QC have all been demonstrated with ions and quantum algorithms using few-ion-qubit systems have been implemented. We review the ... More
Generalized Bilinear Deep Convolutional Neural Networks for Multimodal Biometric IdentificationJul 03 2018In this paper, we propose to employ a bank of modality-dedicated Convolutional Neural Networks (CNNs), fuse, train, and optimize them together for person classification tasks. A modality-dedicated CNN is used for each modality to extract modality-specific ... More
Spin and velocity dependent corrections to the interquark potential and quarkonia spectra from lattice qcdNov 04 1996We present results on (order v^2) QCD interquark potentials from SU(3) lattice simulations on volumes of up to 32^4 lattice sites at beta = 6.2 and beta = 6.0. Preliminary results on quarkonia spectra as obtained from these potentials are presented.
The Reappearance of the Transient Low Mass X-ray Binary X1658-298Dec 22 1999In April 1999 the transient low mass X-ray binary X1658-298 resumed its strong and persistent X-ray emission after a 21-year interval of quiescence. We present RXTE data obtained soon after the reappearance, including four eclipses with a mean duration ... More
Twisted Gabidulin Codes in the GPT CryptosystemJun 26 2018Aug 14 2018In this paper, we investigate twisted Gabidulin codes in the GPT code-based public-key cryptosystem. We show that Overbeck's attack is not feasible for a subfamily of twisted Gabidulin codes. The resulting key sizes are significantly lower than in the ... More
Duplication-Correcting CodesDec 24 2017In this work, we propose constructions that correct duplications of multiple consecutive symbols. These errors are known as tandem duplications, where a sequence of symbols is repeated; respectively as palindromic duplications, where a sequence is repeated ... More
Ab Initio Calculation of Relativistic Corrections to the Static Interquark potential I: SU(2) Gauge TheoryNov 25 1996We test the capability of state-of-the-art lattice techniques for a precise determination of relativistic corrections to the static interquark potential, by use of SU(2) gauge theory. Emphasis is put on the short range structure of the spin dependent ... More
Quark-Antiquark Forces From SU(2) and SU(3) Gauge Theories on Large LatticesJun 08 1995We present results on the spin-independent quark-antiquark potential in SU(3) gauge theory from a simulation on a 48^3*64 lattice at Beta = 6.8, corresponding to a volume of (1.7 fm)^3. Moreover, a comprehensive analysis of spin- and velocity-dependent ... More
Decoding High-Order Interleaved Rank-Metric CodesApr 18 2019This paper presents an algorithm for decoding homogeneous interleaved codes of high interleaving order in the rank metric. The new decoder is an adaption of the Hamming-metric decoder by Metzner and Kapturowski (1990) and guarantees to correct all rank ... More
Optimized Multichannel Quantum Defect Theory for cold molecular collisionsJun 26 2012Multichannel quantum defect theory (MQDT) can provide an efficient alternative to full coupled-channel calculations for low-energy molecular collisions. However, the efficiency relies on interpolation of the Y matrix that encapsulates the short-range ... More
Dramatic reductions in inelastic cross sections for ultracold collisions near Feshbach resonancesAug 14 2009We show that low-energy inelastic cross sections can decrease as well as increase in the vicinity of a zero-energy Feshbach resonance. When an external field is used to tune across such a resonance, the real and imaginary parts of the scattering length ... More
Fast Geometrically-Perturbed Adversarial FacesSep 24 2018Sep 28 2018The state-of-the-art performance of deep learning algorithms has led to a considerable increase in the utilization of machine learning in security-sensitive and critical applications. However, it has recently been shown that a small and carefully crafted ... More
Universal thermodynamic bounds on nonequilibrium response with biochemical applicationsMay 17 2019One of the basic characteristics of any physical system is its response to small perturbations. For instance, response is used to quantify material properties--such as conductivity and viscoelasticity--the sensing capability of cells, and the accuracy ... More
Dimer chains in waveguide quantum electrodynamicsAug 29 2018We examine the propagation of single photons in periodic and disordered dimer chains coupled to one-dimensional chiral and bidirectional waveguides. Each dimer is composed of two dipole-coupled atoms. In the disordered setting, we separately treat two ... More
Nitrogen Abundances and the Distance Moduli of the Pleiades and HyadesSep 06 2013Recent reanalyses of HIPPARCOS parallax data confirm a previously noted discrepancy with the Pleiades distance modulus estimated from main-sequence fitting in the color-magnitude diagram. One proposed explanation of this distance modulus discrepancy is ... More
Neural Networks and the Classification of Active Galactic Nucleus SpectraJul 29 1996The use of Artificial Neural Networks (ANNs) as a classifier of digital spectra is investigated. Using both simulated and real data, it is shown that neural networks can be trained to discriminate between the spectra of different classes of active galactic ... More
Statistical Image Reconstruction for High-Throughput Thermal Neutron Computed TomographyJun 07 2018Sep 25 2018Neutron Computed Tomography (CT) is an increasingly utilised non-destructive analysis tool in material science, palaeontology, and cultural heritage. With the development of new neutron imaging facilities (such as DINGO, ANSTO, Australia) new opportunities ... More
Noncommutative Plurisubharmonic Polynomials Part I: Global AssumptionsDec 30 2010Jan 14 2011We consider symmetric polynomials, p, in the noncommutative free variables (x_1, x_2, ..., x_g). We define the noncommutative complex hessian of p and we call a noncommutative symmetric polynomial noncommutative plurisubharmonic if it has a noncommutative ... More
Counting Roots of Polynomials over $\mathbb{Z}/p^2\mathbb{Z}$Aug 15 2017Dec 12 2017Until recently, the only known method of finding the roots of polynomials over prime power rings, other than fields, was brute force. One reason for this is the lack of a division algorithm, obstructing the use of greatest common divisors. Fix a prime ... More
Dimension distortion by Sobolev mappings in foliated metric spacesJan 25 2013Jul 09 2013We quantify the extent to which a supercritical Sobolev mapping can increase the dimension of subsets of its domain, in the setting of metric measure spaces supporting a Poincar\'e inequality. For foliations of a metric space X defined by a David--Semmes ... More
Complete O(v^2) corrections to the static interquark potential from SU(3) gauge theoryMar 26 1997Mar 27 1997For the first time, we determine the complete spin- and momentum-dependent order v^2 corrections to the static interquark potential from simulations of QCD in the valence quark approximation at inverse lattice spacings of 2-3 GeV. A new flavor dependent ... More
Interleaving Loidreau's Rank-Metric CryptosystemJan 29 2019We propose and analyze an interleaved variant of Loidreau's rank-metric cryptosystem based on rank multipliers. It can be seen as the rank-metric analog of a recent proposal based on interleaved Goppa codes by Elleuch et al.. We analyze and adapt several ... More
Repairing the Faure-Loidreau Public-Key CryptosystemJan 11 2018May 07 2018A repair of the Faure-Loidreau (FL) public-key code-based cryptosystem is proposed. The FL cryptosystem is based on the hardness of list decoding Gabidulin codes which are special rank-metric codes. We prove that the recent structural attack on the system ... More
Effect of quantum confinement on exciton-phonon interactionsJul 04 2002Sep 16 2002We investigate the homogeneous linewidth of localized type-I excitons in type-II GaAs/AlAs superlattices. These localizing centers represent the intermediate case between quasi-two-dimensional (Q2D) and quasi-zero-dimensional localizations. The temperature ... More
Improved Decoding and Error Floor Analysis of Staircase CodesApr 06 2017Dec 03 2018Staircase codes play an important role as error-correcting codes in optical communications. In this paper, a low-complexity method for resolving stall patterns when decoding staircase codes is described. Stall patterns are the dominating contributor to ... More
Spin dependent potentials from SU(2) gauge theoryDec 01 1994We present results on spin dependent potentials from lattice simulations of SU(2) gauge theory. The Coulomb like short range part of the central potential is identified as a mixed vector-scalar exchange while the linear long range part is pure scalar. ... More
On a Rank-Metric Code-Based Cryptosystem with Small Key SizeDec 12 2018A repair of the Faure-Loidreau (FL) public-key code-based cryptosystem is proposed. The FL cryptosystem is based on the hardness of list decoding Gabidulin codes which are special rank-metric codes. We prove that the recent structural attack on the system ... More
On Error Decoding of Locally Repairable and Partial MDS CodesApr 11 2019We consider error decoding of locally repairable codes (LRC) and partial MDS (PMDS) codes through interleaved decoding. For a specific class of LRCs we investigate the success probability of interleaved decoding. For PMDS codes we show that there is a ... More