Results for "Carina M. Persson"

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Step-flow growth of III-V nanowire layersMay 20 2019Understanding the crystallization process in nanoscale systems is central to developing novel, atomically controlled materials to meet the demands of electronic and quantum technology applications. Semiconductor nanowire growth by the vapor-liquid-solid ... More
Herschel-HIFI observations of H2O, NH3 and N2H+ toward high-mass starless and proto-stellar clumps identified by the Hi-GAL surveyAug 26 2015Our present understanding of high-mass star formation still remains very schematic. In particular, it is not yet clear how much of the difference between low-mass and high-mass star formation occurs during the earliest star formation phases. The chemical ... More
Three Small Super-Earths Transiting the nearby star GJ 9827Sep 05 2017Nov 01 2017We report on the discovery of three transiting planets around GJ~9827. The planets have radii of 1.75$_{-0.12}^{+0.11 }$, 1.36$_{- 0.09 }^{+ 0.09}$, and 2.10$_{- 0.15 }^{+ 0.15 }$~R$_{\oplus}$, and periods of 1.20896, 3.6480, and 6.2014 days, respectively. ... More
K2-155: A Bright Metal-Poor M Dwarf with Three Transiting Super-EarthsJan 22 2018Jan 24 2018We report on the discovery of three transiting super-Earths around K2-155 (EPIC 210897587), a relatively bright early M dwarf ($V=12.81$ mag) observed during Campaign 13 of the NASA K2 mission. To characterize the system and validate the planet candidates, ... More
K2-264: A transiting multi-planet system in the Praesepe open clusterSep 06 2018Feb 14 2019Planet host stars with well-constrained ages provide a rare window to the time domain of planet formation and evolution. The NASA K2 mission has enabled the discovery of the vast majority of known planets transiting stars in clusters, providing a valuable ... More
Three Small Planets Transiting a Hyades StarOct 19 2017Feb 15 2018We present the discovery of three small planets transiting K2-136 (LP 358 348, EPIC 247589423), a late K dwarf in the Hyades. The planets have orbital periods of $7.9757 \pm 0.0011$, $17.30681^{+0.00034}_{-0.00036}$, and $25.5715^{+0.0038}_{-0.0040}$ ... More
EPIC 210894022b - A short period super-Earth transiting a metal poor, evolved old starApr 26 2017The star EPIC 210894022 has been identified from a light curve acquired through the K2 space mission as possibly orbited by a transiting planet. Our aim is to confirm the planetary nature of the object and derive its fundamental parameters. We combine ... More
Nanoscale electromechanics to measure thermal conductivity, expansion and interfacial lossesOct 05 2016We study the effect of localized Joule heating on the mechanical properties of doubly clamped nanowires under tensile stress. Local heating results in systematic variation of the resonant frequency; these frequency changes result from thermal stresses ... More
Limit theorems and fluctuations for point vortices of generalized Euler equationsOct 30 2018We prove a mean field limit, a law of large numbers and a central limit theorem for a system of point vortices on the 2D torus at equilibrium with positive temperature. The point vortices are formal solutions of a class of equations generalising the Euler ... More
Exoplanets around Low-mass Stars Unveiled by K2Oct 09 2017Jan 19 2018We present the detection and follow-up observations of planetary candidates around low-mass stars observed by the K2 mission. Based on light-curve analysis, adaptive-optics imaging, and optical spectroscopy at low and high resolution (including radial ... More
The scaling limit of a particle system with long-range interactionDec 18 2015We describe the macroscopic behaviour of a particle system with long-range interactions. We describe conditions on the interaction strength in dependency of the distance of the particles, such that the scaling limit of the particle system is a well-posed ... More
Mass and motion of globulettes in the Rosette NebulaMay 11 2013May 16 2013We have investigated tiny molecular clumps in the Rosette Nebula. Radio observations were made of molecular line emission from 16 globulettes identified in a previous optical survey. In addtion, we collected images in the NIR broad-band JHKs and narrow-band ... More
Chemical complexity induced by efficient ice evaporation in the Barnard 5 molecular cloudJun 05 2017Cold gas-phase water has recently been detected in a cold dark cloud, Barnard 5 located in the Perseus complex, by targeting methanol peaks as signposts for ice mantle evaporation. Observed morphology and abundances of methanol and water are consistent ... More
Threefold Flops via Matrix FactorizationNov 01 2006Sep 02 2008The explicit McKay correspondence, as formulated by Gonzalez-Sprinberg and Verdier, associates to each exceptional divisor in the minimal resolution of a rational double point a matrix factorization of the equation of the rational double point. We study ... More
Theory of Inelastic Electron Tunneling from a Localized Spin in the Impulsive ApproximationNov 15 2008A simple expression for the conductance steps in the inelastic electron tunneling from spin excitations in a single magnetic atom adsorbed on a non-magnetic metal surfaces is derived. The inelastic coupling between the tunneling electron and the spin ... More
Adsorption-induced constraint on delocalization of electron states in an Au chain on NiAl(110)Feb 10 2005We have carried out a density functional study of the localized constraint on the delocalized, unoccupied resonance states in a mono atomic Au chain on a NiAl(110) surface by adsorption of a CO molecule on one of the adatoms in the chain. This constraint ... More
Inhomogeneous potentials, Hausdorff dimension and shrinking targetsNov 13 2017Oct 12 2018Generalising a construction of Falconer, we consider classes of $G_\delta$-subsets of $\mathbb{R}^d$ with the property that sets belonging to the class have large Hausdorff dimension and the class is closed under countable intersections. We relate these ... More
The Transiting Multi-planet System HD15337: Two Nearly Equal-mass Planets Straddling the Radius GapMar 13 2019May 07 2019We report the discovery of a super-Earth and a sub-Neptune transiting the star HD 15337 (TOI-402, TIC 120896927), a bright (V=9) K1 dwarf observed by the Transiting Exoplanet Survey Satellite (TESS) in Sectors 3 and 4. We combine the TESS photometry with ... More
A simplified density functional theory method for charged adsorbates on an ultrathin, insulating film supported by a metal substrateOct 31 2013A simplified density functional theory (DFT) method for charged adsorbates on an ultrathin, insulating film supported by a metal substrate is developed and presented. This new method is based on a previous DFT development that uses a perfect conductor ... More
Shrinking targets in parametrised familiesMar 03 2016May 03 2016We consider certain parametrised families of piecewise expanding maps on the interval, and estimate and sometimes calculate the Hausdorff dimension of the set of parameters for which the orbit of a fixed point has a certain shrinking target property. ... More
Spectral properties of higher order anharmonic oscillatorsDec 04 2009We discuss spectral properties of the self-adjoint operator \[ -d^2/dt^2 + (t^{k+1}/(k+1)-\alpha)^2 \] in $L^2(\mathbb{R})$ for odd integers $k$. We prove that the minimum over $\alpha$ of the ground state energy of this operator is attained at a unique ... More
Theoretical study of electron states in Au chains on NiAl(110)May 28 2004We have carried out a density functional study of unoccupied, resonance states in a single Au atom, dimers, a trimer and infinite Au chains on the NiAl(110) surface. Two inequivalent orientations of the ad-chains with substantially different interatomic ... More
Optimal Space-Time Block Code Designs Based on Irreducible Polynomials of Degree TwoJan 18 2019The main of this paper is to prove that in terms of normalized density, a space-time block code based on an irreducible quadratic polynomial over the Eisenstein integers is an optimal space-time block code compared with any quadratic space-time block ... More
ALMA reveals the magnetic field evolution in the high-mass star forming complex G9.62+0.19May 01 2019May 13 2019Context. The role of magnetic fields during the formation of high-mass stars is not yet fully understood, and the processes related to the early fragmentation and collapse are largely unexplored today. The high-mass star forming region G9.62+0.19 is a ... More
On the semi-classical analysis of the groundstate energy of the Dirichlet Pauli operator in non-simply connected domainsFeb 08 2017Feb 13 2017We consider the Dirichlet Pauli operator in bounded connected domains in the plane, with a semi-classical parameter. We show, in particular, that the ground state energy of this Pauli operator will be exponentially small as the semi-classical parameter ... More
Analysis and entropy stability of the line-based discontinuous Galerkin methodSep 26 2018Apr 29 2019We develop a discretely entropy-stable line-based discontinuous Galerkin method for hyperbolic conservation laws based on a flux differencing technique. By using standard entropy-stable and entropy-conservative numerical flux functions, this method guarantees ... More
Magnetic structure of EuFe2As2 determined by single crystal neutron diffractionAug 21 2009Among various parent compounds of iron pnictide superconductors, EuFe2As2 stands out due to the presence of both spin density wave of Fe and antiferromagnetic ordering (AFM) of the localized Eu2+ moment. Single crystal neutron diffraction studies have ... More
A uniqueness theorem for higher order anharmonic oscillatorsSep 09 2013Sep 10 2013We study for $\alpha\in\R$, $k \in {\mathbb N} \setminus \{0\}$ the family of self-adjoint operators \[ -\frac{d^2}{dt^2}+\Bigl(\frac{t^{k+1}}{k+1}-\alpha\Bigr)^2 \] in $L^2(\R)$ and show that if $k$ is even then $\alpha=0$ gives the unique minimum of ... More
Adaptive numerical homogenization of non-linear diffusion problemsApr 24 2019We propose an efficient numerical strategy for simulating fluid flow through porous media with highly oscillatory characteristics. Specifically, we consider non-linear diffusion models. This scheme is based on the classical homogenization theory and uses ... More
Water deuterium fractionation in the high-mass star-forming region G34.26+0.15 based on Herschel/HIFI dataSep 03 2014Understanding water deuterium fractionation is important for constraining the mechanisms of water formation in interstellar clouds. Observations of HDO and H$_2^{18}$O transitions were carried out towards the high-mass star-forming region G34.26+0.15 ... More
Herschel observations of interstellar chloronium. II - Detections toward G29.96-0.02, W49N, W51, and W3(OH), and determinations of the ortho-to-para and $^{35}$Cl/$^{37}$Cl isotopic ratiosMay 04 2015We report additional detections of the chloronium molecular ion, H$_2$Cl$^+$, toward four bright submillimeter continuum sources: G29.96, W49N, W51, and W3(OH). With the use of the HIFI instrument on the Herschel Space Observatory, we observed the $2_{12}-1_{01}$ ... More
A Frostman type lemma for sets with large intersections, and an application to Diophantine approximationFeb 05 2013Sep 11 2017We consider classes $\mathscr{G}^s ([0,1])$ of subsets of $[0,1]$, originally introduced by Falconer, that are closed under countable intersections, and such that every set in the class has Hausdorff dimension at least $s$. We provide a Frostman type ... More
Strong diamagnetism for the ball in three dimensionsNov 25 2009In this paper we give a detailed asymptotic formula for the lowest eigenvalue of the magnetic Neumann Schr\"odinger operator in the ball in three dimensions with constant magnetic field, as the strength of the magnetic field tends to infinity. This asymptotic ... More
Multiscale differential Riccati equations for linear quadratic regulator problemsJun 14 2017Jun 18 2018We consider approximations to the solutions of differential Riccati equations in the context of linear quadratic regulator problems, where the state equation is governed by a multiscale operator. Similarly to elliptic and parabolic problems, standard ... More
The distribution of superconductivity near a magnetic barrierSep 28 2017We consider the Ginzburg-Landau functional, defined on a two-dimensional simply connected domain with smooth boundary, in the situation when the applied magnetic field is piecewise constant with a jump discontinuity along a smooth curve. In the regime ... More
On the essential spectrum of magnetic Schroedinger operators in exterior domainsSep 03 2011We establish equality between the essential spectrum of the Schroedinger operator with magnetic field in the exterior of a compact arbitrary dimensional domain and that of the operator defined in all the space, and discuss applications of this equality. ... More
Force localization in contracting cell layersJan 13 2012Epithelial cell layers on soft elastic substrates or pillar arrays are commonly used as model systems for investigating the role of force in tissue growth, maintenance and repair. Here we show analytically that the experimentally observed localization ... More
Stringent limits on the magnetic field strength in the disc of TW Hya: ALMA observations of CN polarisationApr 02 2019Despite their importance in the star formation process, measurements of magnetic field strength in proto-planetary discs remain rare. While linear polarisation of dust and molecular lines can give insight into the magnetic field structure, only observations ... More
AMORE-UPF at SemEval-2018 Task 4: BiLSTM with Entity LibraryMay 14 2018This paper describes our winning contribution to SemEval 2018 Task 4: Character Identification on Multiparty Dialogues. It is a simple, standard model with one key innovation, an entity library. Our results show that this innovation greatly facilitates ... More
Observation of Plasma-Undulator Harmonics from a Laser Wakefield AcceleratorDec 04 2009Mar 09 2010This paper has been withdrawn by the author. An assumption made in the analysis is not valid under the experimental conditions.
In situ analysis of catalyst composition during gold catalyzed GaAs nanowire growthFeb 21 2019Semiconductor nanowires offer the opportunity to incorporate new functionality and novel structures into electronic and optoelectronic devices. A clear understanding of the nanowire growth mechanism is essential for well-controlled growth of structures ... More
Limits of III-V nanowire growth based on particle dynamicsMay 21 2019Crystal growth of III-V semiconductor nanowires assisted by a liquid particle/droplet occurs at the solid-liquid interface. This makes the stability of a droplet on the top of a nanowire crucial for successful nanowire growth. Using in-situ transmission ... More
In situ analysis of catalyst composition during gold catalyzed GaAs nanowire growthFeb 21 2019Mar 21 2019Semiconductor nanowires offer the opportunity to incorporate novel structures and functionality into electronic and optoelectronic devices. A clear understanding of the nanowire growth mechanism is essential for well-controlled growth of structures with ... More
What do Entity-Centric Models Learn? Insights from Entity Linking in Multi-Party DialogueMay 16 2019Humans use language to refer to entities in the external world. Motivated by this, in recent years several models that incorporate a bias towards learning entity representations have been proposed. Such entity-centric models have shown empirical success, ... More
Type Iax Supernovae: A New Class of Stellar ExplosionDec 10 2012Feb 04 2013We describe observed properties of the Type Iax class of supernovae (SNe Iax), consisting of SNe observationally similar to its prototypical member, SN 2002cx. The class currently has 25 members, and we present optical photometry and/or optical spectroscopy ... More
The Snow Team Problem (Clearing Directed Subgraphs by Mobile Agents)Dec 01 2017We study several problems of clearing subgraphs by mobile agents in digraphs. The agents can move only along directed walks of a digraph and, depending on the variant, their initial positions may be pre-specified. In general, for a given subset~$\mathcal{S}$ ... More
K2-60b and epic 216468514b. A sub-jovian and a jovian planet from the k2 missionNov 11 2016We report the characterization and independant detection of K2-60b, as well as the detection and characterization of EPIC 216468514b, two transiting hot gaseous planets from the K2 space mission. We confirm the planetary nature of the two systems and ... More
Robust Discrimination between Long-Range Dependence and a Change in MeanApr 04 2018In this paper we introduce a robust to outliers Wilcoxon change-point testing procedure, for distinguishing between short-range dependent time series with a change in mean at unknown time and stationary long-range dependent time series. We establish the ... More
What can topology tell us about the neural code?May 06 2016Neuroscience is undergoing a period of rapid experimental progress and expansion. New mathematical tools, previously unknown in the neuroscience community, are now being used to tackle fundamental questions and analyze emerging data sets. Consistent with ... More
astroquery: An Astronomical Web-Querying Package in PythonJan 14 2019astroquery is a collection of tools for requesting data from databases hosted on remote servers with interfaces exposed on the internet, including those with web pages but without formal application program interfaces (APIs). These tools are built on ... More
The first 48: Discovery and progenitor constraints on the Type Ia supernova 2013gySep 05 2018We present an early-phase $g$-band light curve and visual-wavelength spectra of the normal Type Ia supernova (SN) 2013gy. The light curve is constructed by determining the appropriate S-corrections to transform KAIT natural-system $B$- and $V$-band photometry ... More
The Carnegie Supernova Project: Absolute Calibration and the Hubble ConstantSep 17 2018Sep 19 2018We present an analysis of the final data release of the Carnegie Supernova Project I, focusing on the absolute calibration of the luminosity-decline-rate relation for Type Ia supernovae (SNeIa) using new intrinsic color relations with respect to the color-stretch ... More
The ground state energy of the three dimensional Ginzburg-Landau functional. Part~II: Surface regimeOct 19 2011We study the Ginzburg-Landau model of superconductivity in three dimensions and for strong external magnetic fields. For magnetic field strengths above the phenomenologically defined second critical field it is known from Physics that superconductivity ... More
Casimir Force between Atomically Thin Gold FilmsDec 03 2012Feb 13 2013We have used density functional theory to calculate the anisotropic dielectric functions for ultrathin gold sheets (composed of 1, 3, 6, and 15 atomic layers). Such films are important components in nano-electromechanical systems. When using correct dielectric ... More
Galaxy Stellar Mass Functions from ZFOURGE/CANDELS: An Excess of Low-Mass Galaxies Since z=2 and the Rapid Buildup of Quiescent GalaxiesSep 23 2013Feb 03 2014Using observations from the FourStar Galaxy Evolution Survey (ZFOURGE), we obtain the deepest measurements to date of the galaxy stellar mass function at 0.5 < z < 2.5. ZFOURGE provides well-constrained photometric redshifts made possible through deep ... More
EPIC 220501947 b and K2-237 b: two transiting hot JupitersJul 16 2018We report the discovery from K2 of two transiting hot Jupiter systems. EPIC 220501947 (observed in Campaign 8) is a K5 dwarf which hosts a planet slightly smaller than Jupiter, orbiting with a period of 4.0 d. We have made an independent discovery of ... More
Monstrous BPS-Algebras and the Superstring Origin of MoonshineJan 20 2016Jun 06 2016We provide a physics derivation of Monstrous moonshine. We show that the McKay-Thompson series $T_g$, $g\in \mathbb{M}$, can be interpreted as supersymmetric indices counting spacetime BPS-states in certain heterotic string models. The invariance groups ... More
44 Validated Planets from K2 Campaign 10Jun 29 2018We present 44 validated planets from the 10$^\mathrm{th}$ observing campaign of the NASA $K2$ mission, as well as high resolution spectroscopy and speckle imaging follow-up observations. These 44 planets come from an initial set of 72 vetted candidates, ... More
EPIC 211964830: A transiting multi-planet system in the Praesepe open clusterSep 06 2018Planet host stars with well-constrained ages provide a rare window to the time domain of planet formation and evolution. The NASA K2 mission has enabled the discovery of the vast majority of known planets transiting stars in clusters, providing a valuable ... More
Field Galaxy Evolution Since Z~1 from a Sample of QSO Absorption-Selected GalaxiesOct 06 1994We present some of the results of a large survey aimed at establishing the properties of galaxies selected by their having produced detectable Mg~II $\lambda\lambda 2796$, 2803 absorption in the spectra of background QSOs. The present sample covers the ... More
BPS Algebras, Genus Zero, and the Heterotic MonsterJan 18 2017In this note, we expand on some technical issues raised in \cite{PPV} by the authors, as well as providing a friendly introduction to and summary of our previous work. We construct a set of heterotic string compactifications to 0+1 dimensions intimately ... More
The He-rich core-collapse supernova 2007Y: Observations from X-ray to Radio WavelengthsFeb 04 2009Mar 05 2009A detailed study spanning approximately a year has been conducted on the Type Ib supernova 2007Y. Imaging was obtained from X-ray to radio wavelengths, and a comprehensive set of multi-band (w2m2w1u'g'r'i'UBVYJHKs) light curves and optical spectroscopy ... More
The Carnegie Supernova Project I: Third Photometry Data Release of Low-Redshift Type Ia Supernovae and Other White Dwarf ExplosionsSep 15 2017Nov 07 2017We present final natural system optical (ugriBV) and near-infrared (YJH) photometry of 134 supernovae (SNe) with probable white dwarf progenitors that were observed in 2004-2009 as part of the first stage of the Carnegie Supernova Project (CSP-I). The ... More
Spectrum of electronic excitations due to the adsorption of atoms on metal surfacesNov 09 2006The time-dependent, mean-field Newns-Anderson model for a spin-polarised adsorbate approaching a metallic surface is solved in the wide-band limit. Equations for the time-evolution of the electronic structure of the adsorbate-metal system are derived ... More
Spin-torque oscillator based on tilted magnetization of the fixed layerApr 26 2008The spin torque oscillator (STO), where the magnetization of the fixed layer is tilted out of the film plane, is capable of strong microwave signal generation in zero magnetic field. Through numerical simulations of the Landau-Lifshitz-Gilbert-Slonczewski ... More
U-Duality and the Compactified Gauss-Bonnet TermOct 25 2007Feb 26 2008We present the complete toroidal compactification of the Gauss-Bonnet Lagrangian from D dimensions to (D-n) dimensions. Our goal is to investigate the resulting action from the point of view of the "U-duality" symmetry SL(n+1,R) which is present in the ... More
The distribution of satellites around massive galaxies at 1<z<3 in ZFOURGE/CANDELS: dependence on star formation activityJun 23 2014Jul 07 2014We study the statistical distribution of satellites around star-forming and quiescent central galaxies at 1<z<3 using imaging from the FourStar Galaxy Evolution Survey (ZFOURGE) and the Cosmic Assembly Near-IR Deep Extragalactic Legacy Survey (CANDELS). ... More
HD 89345: a bright oscillating star hosting a transiting warm Saturn-sized planet observed by K2May 04 2018We report the discovery and characterization of HD 89345b (K2-234b; EPIC 248777106b), a Saturn-sized planet orbiting a slightly evolved star. HD 89345 is a bright star ($V = 9.3$ mag) observed by the K2 mission with one-minute time sampling. It exhibits ... More
Spectroscopy of Type Ia Supernovae by the Carnegie Supernova ProjectMay 30 2013This is the first release of optical spectroscopic data of low-redshift Type Ia supernovae (SNe Ia) by the Carnegie Supernova Project including 604 previously unpublished spectra of 93 SNe Ia. The observations cover a range of phases from 12 days before ... More
Coupling and competition between ferroelectricity, magnetism, strain and oxygen vacancies in AMnO3 perovskitesJun 16 2016We use first-principles calculations based on density functional theory to investigate the interplay between oxygen vacancies, A-site cation size / tolerance factor, epitaxial strain, ferroelectricity and magnetism in the perovskite manganite series, ... More
DEMON: a Proposal for a Satellite-Borne Experiment to study Dark Matter and Dark EnergyMay 31 2006We outline a novel satellite mission concept, DEMON, aimed at advancing our comprehension of both dark matter and dark energy, taking full advantage of two complementary methods: weak lensing and the statistics of galaxy clusters. We intend to carry out ... More
Newns-Anderson model of chemicurrents in H/Cu and H/AgApr 16 2008The excitation of the electronic system induced by the adsorption of a hydrogen atom on the (111) surfaces of copper and silver is investigated using the time-dependent, mean-field Newns-Anderson model. Parameters for the model are obtained by fitting ... More
Enhancement of thermoelectric properties by energy filtering: Theoretical potential and experimental reality in nanostructured ZnSbMar 21 2016Energy filtering has been suggested by many authors as a means to improve thermoelectric properties. The idea is to filter away low-energy charge carriers in order to increase Seebeck coefficient without compromising electronic conductivity. This concept ... More
The transiting multi-planet system HD3167: a 5.7 MEarth Super-Earth and a 8.3 MEarth mini-NeptuneJun 08 2017HD3167 is a bright (V=8.9 mag) K0V star observed by the NASA's K2 space mission during its Campaign 8. It has been recently found to host two small transiting planets, namely, HD3167b, an ultra short period (0.96 d) super-Earth, and HD3167c, a mini-Neptune ... More
The Peculiar SN 2005hk: Do Some Type Ia Supernovae Explode as Deflagrations?Nov 09 2006Mar 26 2007We present extensive u'g'r'i'BVRIYJHKs photometry and optical spectroscopy of SN 2005hk. These data reveal that SN 2005hk was nearly identical in its observed properties to SN 2002cx, which has been called ``the most peculiar known type Ia supernova.'' ... More
QHWM of the orthogonal and symplectic types Lie subalgebras of the Lie algebra of the matrix quantum pseudo differential operatorsMar 17 2017In this paper we classify the irreducible quasifinite highest weight modules over the orthogonal and symplectic types Lie subalgebras of the Lie algebra of the matrix quantum pseudo differential operators. We also realize them in terms of the irreducible ... More
Electron-hole pair creation by atoms incident on a metal surfaceSep 30 2009Electron-hole pair creation by an adsorbate incident on a metal surface is described using \textit{ab initio} methods. The approach starts with standard first principles electronic structure theory, and proceeds to combine classical, quantum oscillator ... More
A Special Class of Rank 10 and 11 Coxeter GroupsOct 26 2006Jun 26 2008In the course of investigating regular subalgebras of E(10) related to cosmological solutions of 11-dimensional supergravity supporting an electric 4-form field, a class of rank 10 Coxeter subgroups of the Weyl group of E(10) was uncovered (hep-th/0606123). ... More
Fast readout of a single Cooper-pair box using its quantum capacitanceApr 19 2010We have fabricated a single Cooper-pair box (SCB) together with an on-chip lumped element resonator. By utilizing the quantum capacitance of the SCB, its state can be read out by detecting the phase of a radio-frequency (rf) signal reflected off the resonator. ... More
A note on Borel--Cantelli lemmas for non-uniformly hyperbolic dynamical systemsMar 10 2011Let $(B_{i})$ be a sequence of measurable sets in a probability space $(X,\mathcal{B}, \mu)$ such that $\sum_{n=1}^{\infty} \mu (B_{i}) = \infty$. The classical Borel-Cantelli lemma states that if the sets $B_{i}$ are independent, then $\mu (\{x \in X ... More
$γ$-ray linear polarization measurements and $(g_{9/2})^{-3}$ neutron alignment in $^{91}$RuApr 11 2013Linear polarization measurements have been performed for $\gamma$-rays in $^{91}$Ru produced with the $^{58}$Ni($^{36}$Ar, $2p1n$$\gamma$)$^{91}$Ru reaction at a beam energy of 111 MeV. The EXOGAM Ge clover array has been used to measure the $\gamma$-$\gamma$ ... More
Point vortices for inviscid generalized surface quasi-geostrophic modelsDec 12 2018We give a rigorous proof of the validity of the point vortex description for a class of inviscid generalized surface quasi-geostrophic models on the whole plane.
On the efficiency of Gini's mean differenceMay 20 2014We examine the efficiency of the mean deviation and Gini's mean difference (the mean of all pairwise distances). Our findings support the viewpoint that Gini's mean difference combines the advantages of the mean deviation and the standard deviation.
Quasifinite representations of the Lie superalgebra of quantum pseudo differential operatorsJun 22 2007In this paper we extend general results obtained by V. Kac and J. Liberati, in "Unitary quasifinite representations of $W_\infty$", (Letters Math. Phys., 53 (2000), 11-27), for quasifinite highest weight representations of $\Z$-graded Lie algebras to ... More
Rubber friction on (apparently) smooth lubricated surfacesOct 18 2007We study rubber sliding friction on hard lubricated surfaces. We show that even if the hard surface appears smooth to the naked eye, it may exhibit short wavelength roughness, which may give the dominant contribution to rubber friction. That is, the observed ... More
Contact electrification and the work of adhesionMay 13 2013We present a general theory for the contribution from contact electrification to the work necessary to separate two solid bodies. The theory depends on the surface charge density correlation function, which we deduce from Kelvin Force Microscopy (KFM) ... More
Observation of resonance trapping in an open microwave cavityJul 12 2000The coupling of a quantum mechanical system to open decay channels has been theoretically studied in numerous works, mainly in the context of nuclear physics but also in atomic, molecular and mesoscopic physics. Theory predicts that with increasing coupling ... More
QCD Sum Rules Approach to the $X,~Y$ and $Z$ StatesDec 19 2018In the past decade, due to the experimental observation of many charmonium-like states, there has been a revival of hadron spectroscopy. In particular, the experimental observation of charged charmonium-like, $Z_c$ states, and bottomonium-like, $Z_b$ ... More
Velocity dependence of friction of confined polymersNov 18 2009We present molecular dynamics friction calculations for confined hydrocarbon solids with molecular lengths from 20 to 1400 carbon atoms. Two cases are considered: (a) polymer sliding against a hard substrate, and (b) polymer sliding on polymer. We discuss ... More
Effective Viscosity of Confined HydrocarbonsJan 24 2012We present molecular dynamics friction calculations for confined hydrocarbon films with molecular lengths from 20 to 1400 carbon atoms. We find that the logarithm of the effective viscosity \mu eff for nanometer-thin films depends linearly on the logarithm ... More
Scanning tunneling microscopy and spectroscopy of sodium-chloride overlayers on the stepped Cu(311) surface: Experimental and theoretical studyJun 11 2004The physical properties of ultrathin NaCl overlayers on the stepped Cu(311) surface have been characterized using scanning tunneling microscopy (STM) and spectroscopy, and density functional calculations. Simulations of STM images and differential conductance ... More
Lie subalgebras of the matrix quantum pseudo differential operatorsMar 18 2016Jul 01 2016We give a complete description of the anti-involutions that preserve the principal gradation of the algebra of matrix quantum pseudodifferential operators and we describe the Lie subalgebras of its minus fixed points.
The Leray Dimension of a Convex CodeDec 22 2016Convex codes were recently introduced as models for neural codes in the brain. Any convex code $\C$ has an associated minimal embedding dimension $d(\C)$, which is the minimal Euclidean space dimension such that the code can be realized by a collection ... More
Irreducible Continuous Representations of the Simple Linearly Compact n-Lie Superalgebra of type WJan 04 2016Feb 15 2016In the present paper we classify all irreducible continuous representations of the simple linearly compact n-Lie superalgebra of type W. The classification is based on a bijective correspondence between the continuous representations of the n-Lie algebras ... More
Modulation of Localized States in ElectroconvectionJan 25 2002We report on the effects of temporal modulation of the driving force on a particular class of localized states, known as worms, that have been observed in electroconvection in nematic liquid crystals. The worms consist of the superposition of traveling ... More
Pattern completion in symmetric threshold-linear networksDec 02 2015May 07 2016Threshold-linear networks are a common class of firing rate models that describe recurrent interactions among neurons. Unlike their linear counterparts, these networks generically possess multiple stable fixed points (steady states), making them viable ... More
Neural ring homomorphisms and maps between neural codesNov 01 2015Understanding how the brain stores and processes information is central to mathematical neuroscience. Neural data is often represented as a neural code: a set of binary firing patterns $\mathcal{C}\subset\{0,1\}^n$. We have previously introduced the neural ... More
On the Equivalence of $-\text{Tr}ρ\lnρ$ and Thermodynamic EntropyOct 22 2018Nov 15 2018In 1939, von Neumann argued for the equivalence of the thermodynamic entropy and $-\text{Tr}\rho\ln\rho$, since known as the von Neumann entropy. Hemmo and Shenker (2006) recently challenged this argument by pointing out an alleged discrepancy between ... More
Irreducible Continuous Representations of the Simple Linearly Compact n-Lie Superalgebra of type $S$Apr 14 2016In the present paper we classify all irreducible continuous representations of the simple linearly compact n-Lie superalgebra of type S. The classification is based on a bijective correspondence between the continuous representations of the n-Lie algebras ... More
Charge transport in InAs nanowire Josephson junctionsNov 07 2013Jun 27 2014We present an extensive experimental and theoretical study of the proximity effect in InAs nanowires connected to superconducting electrodes. We fabricate and investigate devices with suspended gate-controlled nanowires and nonsuspended nanowires, with ... More