cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quantum Simulation of the Abelian-Higgs Lattice Gauge Theory with Ultracold Atoms
Creators: name: González-Cuadra, Daniel
name: Zohar, Erez
name: Cirac, J. Ignacio
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present a quantum simulation scheme for the Abelian-Higgs lattice gauge theory using ultracold bosonic atoms in optical lattices. The model contains both gauge and Higgs scalar fields, and exhibits interesting phases related to confinement and the Higgs mechanism. The model can be simulated by an atomic Hamiltonian, by first mapping the local gauge symmetry to an internal symmetry of the atomic system, the conservation of hyperfine angular momentum in atomic collisions. By including auxiliary bosons in the simulation, we show how the Abelian-Higgs Hamiltonian emerges effectively. We analyze the accuracy of our method in terms of different experimental parameters, as well as the effect of the finite number of bosons on the quantum simulator. Finally, we propose possible experiments for studying the ground state of the system in different regimes of the theory, and measuring interesting high energy physics phenomena in real time.
Solvable groups of interval exchange transformations
Creators: name: Dahmani, François
name: Fujiwara, Koji
name: Guirardel, Vincent
Publisher: name: arXiv
Year: 2017
Subjects: subject: Group Theory (math.GR)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We prove that any finitely generated torsion free solvable subgroup of the group ${\rm IET}$ of all Interval Exchange Transformations is virtually abelian. In contrast, the lamplighter groups $A\wr \mathbb{Z}^k$ embed in ${\rm IET}$ for every finite abelian group $A$, and we construct uncountably many non pairwise isomorphic 3-step solvable subgroups of ${\rm IET}$ as semi-direct products of a lamplighter group with an abelian group. We also prove that for every non-abelian finite group $F$, the group $F\wr \mathbb{Z}^k$ does not embed in ${\rm IET}$.
description: 17 pages, 2 figures, to appear
Freeness characterizations on free chaos spaces
Creators: name: Bourguin, Solesne
name: Nourdin, Ivan
Publisher: name: arXiv
Year: 2017
Subjects: subject: Operator Algebras (math.OA)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: This paper deals with characterizing the freeness and asymptotic freeness of free multiple integrals with respect to a free Brownian motion or a free Poisson process. We obtain three characterizations of freeness, in terms of contraction operators, covariance conditions, and free Malliavin gradients. We show how these characterizations can be used in order to obtain limit theorems, transfer principles, and asymptotic properties of converging sequences.
Zeros of Loschmidt echo in the presence of Anderson localization
Creators: name: Yin, Honghao
name: Chen, Shu
name: Xianlong, Gao
name: Wang, Pei
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study the Loschmidt echo and the dynamical free energy of the Anderson model after a quench of the disorder strength. If the initial state is extended and the eigenstates of the post-quench Hamiltonian are strongly localized, we argue that the Loschmidt echo exhibits zeros periodically with the period $2π/D$ where $D$ is the width of spectra. At these zeros, the dynamical free energy diverges in a logarithmic way. We present numerical evidence of our argument in one- and three-dimensional Anderson models. Our findings connect the dynamical quantum phase transitions to the localization-delocalization phase transitions.
description: 5 pages, 4 figures
On Blow-up Profile of Ground States of Boson Stars with External Potential
Creators: name: Nguyen, Dinh-Thi
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study minimizers of the pseudo-relativistic Hartree functional $$\mathcal{E}_{a}(u):=\|(-Δ+m^{2})^{1/4}u\|_{L^{2}}^{2}-\frac{a}{2}\int_{\mathbb{R}^{3}}(\left|\cdot\right|^{-1}\star |u|^{2})(x)|u(x)|^{2}{\rm d}x+\int_{\mathbb{R}^{3}}V(x)|u(x)|^{2}{\rm d}x$$ under the mass constraint $\int_{\mathbb{R}^3}|u(x)|^2{\rm d}x=1$. Here $m>0$ is the mass of particles and $V\geq 0$ is an external potential. We prove that minimizers exist if and only if $a$ satisfies $0\leq a0$.
description: To appear in Journal of Statistical Physics
Flatness of Minima in Random Inflationary Landscapes
Creators: name: He, Yang-Hui
name: Jejjala, Vishnu
name: Pontiggia, Luca
name: Xiao, Yan
name: Zhou, Da
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the likelihood which relative minima of random polynomial potentials support the slow-roll conditions for inflation. Consistent with renormalizability and boundedness, the coefficients that appear in the potential are chosen to be order one with respect to the energy scale at which inflation transpires. Investigation of the single field case illustrates a window in which the potentials satisfy the slow-roll conditions. When there are two scalar fields, we find that the probability depends on the choice of distribution for the coefficients. A uniform distribution yields a $0.05\%$ probability of finding a suitable minimum in the random potential whereas a maximum entropy distribution yields a $0.1\%$ probability.
description: 33 pages, 12 figures, 1 table, LaTeX, v3: matching version appearing in publication
Einstein-Bose condensation of Onsager vortices
Creators: name: Valani, Rahil N.
name: Groszek, Andrew J.
name: Simula, Tapio P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We have studied statistical mechanics of a gas of vortices in two dimensions. We introduce a new observable---a condensate fraction of Onsager vortices---to quantify the emergence of the vortex condensate. The condensation of Onsager vortices is most transparently observed in a single vortex species system and occurs due to a competition between solid body rotation (c.f. vortex lattice) and potential flow (c.f. multiple quantum vortex state). We propose an experiment to observe the condensation transition of the vortices in such a single vortex species system.
description: 13 pages, 10 figures
Knapp-Stein Type Intertwining Operators for Symmetric Pairs II. -- The Translation Principle and Intertwining Operators for Spinors
Creators: name: Frahm, Jan
name: Ørsted, Bent
Publisher: name: arXiv
Year: 2017
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 22E45 (Primary), 47G10 (Secondary)

description: For a symmetric pair $(G,H)$ of reductive groups we extend to a large class of generalized principal series representations our previous construction of meromorphic families of symmetry breaking operators. These operators intertwine between a possibly vector-valued principal series of $G$ and one for $H$ and are given explicitly in terms of their integral kernels. As an application we give a complete classification of symmetry breaking operators from spinors on a Euclidean space to spinors on a hyperplane, intertwining for a double cover of the conformal group of the hyperplane.
Classification of out-of-time-order correlators
Creators: name: Haehl, Felix M.
name: Loganayagam, R.
name: Narayan, Prithvi
name: Rangamani, Mukund
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The space of n-point correlation functions, for all possible time-orderings of operators, can be computed by a non-trivial path integral contour, which depends on how many time-ordering violations are present in the correlator. These contours, which have come to be known as timefolds, or out-of-time-order (OTO) contours, are a natural generalization of the Schwinger-Keldysh contour (which computes singly out-of-time-ordered correlation functions). We provide a detailed discussion of such higher OTO functional integrals, explaining their general structure, and the myriad ways in which a particular correlation function may be encoded in such contours. Our discussion may be seen as a natural generalization of the Schwinger-Keldysh formalism to higher OTO correlation functions. We provide explicit illustration for low point correlators (n=2,3,4) to exemplify the general statements.
description: 48 pages + appendices. v2: added references and minor clarifications. v3: additional clarifications and examples added. v4: presentational improvements
Next Generation Virgo Cluster Survey. XXI. The weak lensing masses of the CFHTLS and NGVS RedGOLD galaxy clusters and calibration of the optical richness
Creators: name: Parroni, Carolina
name: Mei, Simona
name: Erben, Thomas
name: Van Waerbeke, Ludovic
name: Raichoor, Anand
name: Ford, Jes
name: Licitra, Rossella
name: Meneghetti, Massimo
name: Hildebrandt, Hendrik
name: Miller, Lance
name: Côté, Patrick
name: Covone, Giovanni
name: Cuillandre, Jean-Charles
name: Duc, Pierre-Alain
name: Ferrarese, Laura
name: Gwyn, Stephen D. J.
name: Puzia, Thomas H.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We measured stacked weak lensing cluster masses for a sample of 1325 galaxy clusters detected by the RedGOLD algorithm in the Canada-France-Hawaii Telescope Legacy Survey W1 and the Next Generation Virgo Cluster Survey at $0.2
description: 27 pages, 10 figures
Gravitational memory for uniformly accelerated observers
Creators: name: Kolekar, Sanved
name: Louko, Jorma
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Recently, Hawking, Perry and Strominger described a physical process that implants supertranslational hair on a Schwarzschild black hole by an infalling matter shock wave without spherical symmetry. Using the BMS-type symmetries of the Rindler horizon, we present an analogous process that implants supertranslational hair on a Rindler horizon by a matter shock wave without planar symmetry, and we investigate the corresponding memory effect on the Rindler family of uniformly linearly accelerated observers. We assume each observer to remain linearly uniformly accelerated through the wave, in the sense of the curved spacetime generalisation of the Letaw-Frenet equations. Starting with a family of observers who follow the orbits of a single boost Killing vector before the wave, we find that after the wave has passed, each observer still follows the orbit of a boost Killing vector but this boost differs from trajectory to trajectory, and the trajectory-dependence carries a memory of the planar inhomogeneity of the wave. We anticipate this classical memory phenomenon to have a counterpart in Rindler space quantum field theory.
description: 18 pages, v2: references added, v3: presentational clarifications
A note on self orbit equivalences of Anosov flows and bundles with fiberwise Anosov flows
Creators: name: Barthelmé, Thomas
name: Gogolev, Andrey
Publisher: name: arXiv
Year: 2017
Subjects: subject: Dynamical Systems (math.DS)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We show that a self orbit equivalence of a transitive Anosov flow on a $3$-manifold which is homotopic to identity has to either preserve every orbit or the Anosov flow is $\mathbb{R}$-covered and the orbit equivalence has to be of a specific type. This result shows that one can remove a relatively unnatural assumption in a result of Farrell and Gogolev about the topological rigidity of bundles supporting a fiberwise Anosov flow when the fiber is $3$-dimensional.
description: Accepted version of the article
On the subregular $J$-rings of Coxeter systems
Creators: name: Xu, Tianyuan
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: We recall Lusztig's construction of the asymptotic Hecke algebra $J$ of a Coxeter system $(W,S)$ via the Kazhdan--Lusztig basis of the corresponding Hecke algebra. The algebra $J$ has a direct summand $J_E$ for each two-sided Kazhdan--Lusztig cell of $W$, and we study the summand $J_C$ corresponding to a particular cell $C$ called the subregular cell. We develop a combinatorial method to compute $J_C$ without using the Kazhdan--Lusztig basis. As applications, we deduce some connections between $J_C$ and the Coxeter diagram of $W$, and we show that for certain Coxeter systems $J_C$ contains subalgebras that are free fusion rings in the sense of [Banica], thereby connecting the subalgebras to compact quantum groups arising from operator algebra theory.
description: 35 pages, final version
Learning Distributed Representations of Texts and Entities from Knowledge Base
Creators: name: Yamada, Ikuya
name: Shindo, Hiroyuki
name: Takeda, Hideaki
name: Takefuji, Yoshiyasu
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computation and Language (cs.CL)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: We describe a neural network model that jointly learns distributed representations of texts and knowledge base (KB) entities. Given a text in the KB, we train our proposed model to predict entities that are relevant to the text. Our model is designed to be generic with the ability to address various NLP tasks with ease. We train the model using a large corpus of texts and their entity annotations extracted from Wikipedia. We evaluated the model on three important NLP tasks (i.e., sentence textual similarity, entity linking, and factoid question answering) involving both unsupervised and supervised settings. As a result, we achieved state-of-the-art results on all three of these tasks. Our code and trained models are publicly available for further academic research.
Evidence of reverse and intermediate size segregation in dry granular flows down a rough incline
Creators: name: Thomas, Nathalie
name: D'ortona, Umberto
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In a dry granular flow, size segregation behave differently for a mixture containing a few large beads with a size ratio (S) above 5 (Thomas, Phys.Rev.E 62,96(2000)). For moderate large S, large beads migrate to an intermediate depth in the bed: this is called intermediate segregation. For the largest S, large beads migrate to the bottom: this is called reverse segregation (in contrast with surface segregation). As the reversal and intermediate depth values depend on the bead fraction, this numerical study mainly uses a single large tracer. Small fractions are also computed showing the link between a tracer behavior and segregation process. For half-filled rotating drum and for rough incline, two and three (3D) dimensional cases are studied. In the tumbler, trajectories of a large tracer show that it reaches a constant depth during the flow. For large S, this depth is intermediate with a progressive sinking when S increases. Largest S correspond to tracers at the bottom of the flow. All 3D simulation are in quantitative agreement with the experiments. In the flow down an incline, a large tracer reaches an equilibrium depth during flow. For large S, its depth is intermediate, inside the bed. For the largest S, its depth is reverse, near the bottom. Results are slightly different for thin or thick flow. For 3D thick flows, the reversal between surface and bottom positions occurs within a short range of S: no tracer stabilizes near mid-height and two reachable intermediate depth layers exist, below the surface and above the bottom. For 3D thin flows, all intermediate depths are reachable, depending on S. The numerical study of larger tracer fractions (5-10%) shows the 3 segregation patterns (surface, intermediate, reverse) corresponding to the 3 types of equilibrium depth. The reversal is smoother than for a single tracer. It happens around S=4.5, in agreement with experiments.
description: 18 pages, 27 figures
Perspectives of direct Detection of supersymmetric Dark Matter in the NMSSM
Creators: name: Beskidt, C.
name: de Boer, W.
name: Kazakov, D. I.
name: Wayand, S.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In the Next-to-Minimal-Supersymmetric-Standard-Model (NMSSM) the lightest supersymmetric particle (LSP) is a candidate for the dark matter (DM) in the universe. It is a mixture from the various gauginos and Higgsinos and can be bino-, Higgsino- or singlino-dominated. Singlino-dominated LSPs can have very low cross sections below the neutrino background from coherent neutrino scattering which is limiting the sensitivity of future direct DM search experiments. However, previous studies suggested that the combination of both, the spin-dependent (SD) and spin-independent (SI) searches are sensitive in complementary regions of parameter space, so considering both searches will allow to explore practically the whole parameter space of the NMSSM. In this letter, the different scenarios are investigated with a new scanning technique, which reveals that significant regions of the NMSSM parameter space cannot be explored, even if one considers both, SI and SD, searches.
description: 22 pages, 3 figures, this version is accepted by PLB after minor modifications
The Mismeasure of Mergers: Revised Limits on Self-interacting Dark Matter in Merging Galaxy Clusters
Creators: name: Wittman, David
name: Golovich, Nathan
name: Dawson, William A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In an influential recent paper, Harvey et al (2015) derive an upper limit to the self-interaction cross section of dark matter ($σ_{\rm DM} < 0.47$ cm$^2$/g at 95\% confidence) by averaging the dark matter-galaxy offsets in a sample of merging galaxy clusters. Using much more comprehensive data on the same clusters, we identify several substantial errors in their offset measurements. Correcting these errors relaxes the upper limit on $σ_{\rm DM}$ to $\lesssim 2$ cm$^2$/g, following the Harvey et al prescription for relating offsets to cross sections in a simple solid body scattering model. Furthermore, many clusters in the sample violate the assumptions behind this prescription, so even this revised upper limit should be used with caution. Although this particular sample does not tightly constrain self-interacting dark matter models when analyzed this way, we discuss how merger ensembles may be used more effectively in the future. We conclude that errors inherent in using single-band imaging to identify mass and light peaks do not necessarily average out in a sample of this size, particularly when a handful of substructures constitute a majority of the weight in the ensemble.
description: this version accepted to ApJ; various improvements in presentation relative to v1
Detailed Surface Geometry and Albedo Recovery from RGB-D Video Under Natural Illumination
Creators: name: Zuo, Xinxin
name: Wang, Sen
name: Zheng, Jiangbin
name: Yang, Ruigang
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In this paper we present a novel approach for depth map enhancement from an RGB-D video sequence. The basic idea is to exploit the shading information in the color image. Instead of making assumption about surface albedo or controlled object motion and lighting, we use the lighting variations introduced by casual object movement. We are effectively calculating photometric stereo from a moving object under natural illuminations. The key technical challenge is to establish correspondences over the entire image set. We therefore develop a lighting insensitive robust pixel matching technique that out-performs optical flow method in presence of lighting variations. In addition we present an expectation-maximization framework to recover the surface normal and albedo simultaneously, without any regularization term. We have validated our method on both synthetic and real datasets to show its superior performance on both surface details recovery and intrinsic decomposition.
description: TPAMI accepted
CIRCLE IN A ROUND.  So[ñ_n]ando la lluvia
Creators: name: Maldonado Gómez, José
Publisher: name: Centro José Guerrero. Granada. Diputación de Granada.
Year: 2019

description: ¿Cómo se expone un proyecto de edición sonora, un proyecto fundamentalmente basado en compartir experiencias?

LEVE es una asociación artística nacida en 2011 y dedicada a producir una edición sonora homónima cada año. Para ello invitan a artistas a realizar una estancia en su casa-estudio, ubicada en una zona natural de escasa población de la provincia de León. Las personas que participan, con las que comparten espacio y experiencias durante un tiempo acordado, crean trabajos sonoros específicos para la publicación que luego producen en vinilo y serigrafían a mano. LEVE es un proyecto site-specific, inscrito conceptualmente en una idea propia de la grabación de campo.

Esta exposición surge de una propuesta directa del Centro José Guerrero. El reto que se proponía era llevar el proyecto más allá de las ediciones sonoras, o acompañarlas de piezas propiamente expositivas realizadas para esta ocasión. Esta premisa generaba una serie de cuestiones como, por ejemplo, de qué forma se podía extender el papel de anfitriones-comisarios-productores que adoptan habitualmente los integrantes de LEVE en las ediciones sonoras al ámbito de esta exposición, o cómo materializar en dichas piezas que este proyecto no consiste tan solo en una serie de discos de vinilo o en trabajos aislados, sino en un conjunto heterogéneo y creciente de personas, lugares comunes y experiencias domésticas y estéticas.
On the rank of universal quadratic forms over real quadratic fields
Creators: name: Blomer, Valentin
name: Kala, Vítězslav
Publisher: name: arXiv
Year: 2017
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11E12, 11R11, 11A55

description: We study the minimal number of variables required by a totally positive definite diagonal universal quadratic form over a real quadratic field $\mathbb Q(\sqrt D)$ and obtain lower and upper bounds for it in terms of certain sums of coefficients of the associated continued fraction. We also estimate such sums in terms of $D$ and establish a link between continued fraction expansions and special values of $L$-functions in the spirit of Kronecker's limit formula.
description: 16 pages, to appear in Documenta Mathematica
A grid function formulation of a class of ill-posed parabolic equations
Creators: name: Bottazzi, Emanuele
Publisher: name: arXiv
Year: 2017
Subjects: subject: Analysis of PDEs (math.AP)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46F30, 35K55, 47J06

description: We study a nonstandard formulation of the Neumann initial value problem \begin{equation} \begin{array}{rl} u_t(x,t) = Δϕ(u(x,t)), & x \in Ω\subseteq \mathbb{R}^k, \ t \in \mathbb{R} \label{abstract}\\ u(x,0) = u_0(x), & x \in Ω. \end{array} \end{equation} with Neumann boundary conditions. The function $ϕ\in C^1(\mathbb{R})$ is assumed to be decreasing either in a bounded interval $(u^-,u^+)$, or in an unbounded interval $(u^-,+\infty)$: under this hypothesis, the aforementioned problem is ill-posed and only allows for measure-valued solutions. Moreover, such solutions are in general not unique. By using nonstandard analysis, we derive from very simple physical principles a continuous-in-time and discrete-in-space model for the ill-posed pde, and we prove that this model is well-posed. We will also prove that the solution of the nonstandard formulation is coherent with the measure-valued solutions and still retains relevant physical properties, chiefly among them an entropy condition that characterizes physically admissible solutions to the original problem. We then study the asymptotic behaviour of the nonstandard solutions. In doing so, we will give a positive answer to a conjecture by Smarrazzo on the coarsening of the solutions to the ill-posed problem under the hypothesis that $ϕ$ is decreasing in the interval $(u^-,+\infty)$.
Heavy Quark Potential in a static and strong homogeneous magnetic field
Creators: name: Hasan, Mujeeb
name: Chatterjee, Bhaswar
name: Patra, Binoy Krishna
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We have investigated the properties of quarkonia in a thermal QCD medium in the background of strong magnetic field. For that purpose, we employ the Schwinger proper-time quark propagator in the lowest Landau level to calculate the one-loop gluon self-energy, which in the sequel gives the the effective gluon propagator. As an artifact of strong magnetic field approximation ($eB>>T^2$ and $eB>>m^2$), the Debye mass for massless flavors is found to depend only on the magnetic field which is the dominant scale in comparison to the scales prevalent in the thermal medium. However, for physical quark masses, it depends on both magnetic field and temperature in a low temperature and high magnetic field but the temperature dependence is very meagre and becomes independent of temperature beyond a certain temperature and magnetic field. With the above mentioned ingredients, the potential between heavy quark ($Q$) and anti-quark ($\bar Q$) is obtained in a hot QCD medium in the presence of strong magnetic field by correcting both short and long range components of the potential in real-time formalism. It is found that the long range part of the quarkonium potential is affected much more by magnetic field as compared to the short range part. This observation facilitates us to estimate the magnetic field beyond which the potential will be too weak to bind $Q\bar Q$ together. For example, the $J/ψ$ is dissociated at $eB \sim$ 10 $m_π^2$ and $Υ$ is dissociated at $eB \sim$ 100 $m_π^2$ whereas its excited states, $ψ^\prime$ and $Υ^\prime$ are dissociated at smaller magnetic field $eB= m_π^2$, $13 m_π^2$, respectively.
description: 20 pages, 5 figures
Randomized Dynamic Mode Decomposition
Creators: name: Erichson, N. Benjamin
name: Mathelin, Lionel
name: Brunton, Steven L.
name: Kutz, J. Nathan
Publisher: name: arXiv
Year: 2017
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: This paper presents a randomized algorithm for computing the near-optimal low-rank dynamic mode decomposition (DMD). Randomized algorithms are emerging techniques to compute low-rank matrix approximations at a fraction of the cost of deterministic algorithms, easing the computational challenges arising in the area of `big data'. The idea is to derive a small matrix from the high-dimensional data, which is then used to efficiently compute the dynamic modes and eigenvalues. The algorithm is presented in a modular probabilistic framework, and the approximation quality can be controlled via oversampling and power iterations. The effectiveness of the resulting randomized DMD algorithm is demonstrated on several benchmark examples of increasing complexity, providing an accurate and efficient approach to extract spatiotemporal coherent structures from big data in a framework that scales with the intrinsic rank of the data, rather than the ambient measurement dimension. For this work we assume that the dynamics of the problem under consideration is evolving on a low-dimensional subspace that is well characterized by a fast decaying singular value spectrum.
The total angular momentum algebra related to the $\mathrm{S}_3$ Dunkl Dirac equation
Creators: name: De Bie, Hendrik
name: Oste, Roy
name: Van der Jeugt, Joris
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Classical Analysis and ODEs (math.CA)
subject: Representation Theory (math.RT)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider the symmetry algebra generated by the total angular momentum operators, appearing as constants of motion of the $\mathrm{S}_3$ Dunkl Dirac equation. The latter is a deformation of the Dirac equation by means of Dunkl operators, in our case associated to the root system $A_2$, with corresponding Weyl group $\mathrm{S}_3$, the symmetric group on three elements. The explicit form of the symmetry algebra in this case is a one-parameter deformation of the classical total angular momentum algebra $\mathfrak{so}(3)$, incorporating elements of $\mathrm{S}_3$. This was obtained using recent results on the symmetry algebra for a class of Dirac operators, containing in particular the Dirac-Dunkl operator for arbitrary root system. For this symmetry algebra, we classify all finite-dimensional, irreducible representations and determine the conditions for the representations to be unitarizable. The class of unitary irreducible representations admits a natural realization acting on a representation space of eigenfunctions of the Dirac Hamiltonian. Using a Cauchy-Kowalevsky extension theorem we obtain explicit expressions for these eigenfunctions in terms of Jacobi polynomials.
description: 29 pages, 1 figure; New title, introduction and physics context
Gravitational Wave Oscillations in Bigravity
Creators: name: Max, Kevin
name: Platscher, Moritz
name: Smirnov, Juri
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We derive consistent equations for gravitational wave oscillations in bigravity. In this framework a second dynamical tensor field is introduced in addition to General Relativity and coupled such that one massless and one massive linear combination arise. Only one of the two tensors is the physical metric coupling to matter, and thus the basis in which gravitational waves propagate is different from the basis where the wave is produced and detected. Therefore, one should expect -- in analogy to neutrino oscillations -- to observe an oscillatory behavior. We show how this behavior arises explicitly, discuss phenomenological implications and present new limits on the graviton parameter space in bigravity.
description: 6 pages, 3 figures, journal version
Search for new phenomena with the MT2 variable in the all-hadronic final state produced in proton-proton collisions at sqrt(s) = 13 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A search for new phenomena is performed using events with jets and significant transverse momentum imbalance, as inferred through the MT2 variable. The results are based on a sample of proton-proton collisions collected in 2016 at a center-of-mass energy of 13 TeV with the CMS detector and corresponding to an integrated luminosity of 35.9 inverse femtobarns. No excess event yield is observed above the predicted standard model background, and the results are interpreted as exclusion limits at 95% confidence level on the masses of predicted particles in a variety of simplified models of R-parity conserving supersymmetry. Depending on the details of the model, 95% confidence level lower limits on the gluino (light-flavor squark) masses are placed up to 2025 (1550) GeV. Mass limits as high as 1070 (1175) GeV are set on the masses of top (bottom) squarks. Information is provided to enable re-interpretation of these results, including model-independent limits on the number of non-standard model events for a set of simplified, inclusive search regions.
description: Replaced with the published version. Added the journal reference and DOI. All the figures and tables, including additional supplemental figures and tables, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SUS-16-036 (CMS Public Pages)
The algebra of observables in noncommutative deformation theory
Creators: name: Eriksen, Eivind
name: Siqveland, Arvid
Publisher: name: arXiv
Year: 2017
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: We consider the algebra $\mathcal O(\mathsf M)$ of observables and the (formally) versal morphism $η: A \to \mathcal O(\mathsf M)$ defined by the noncommutative deformation functor $\mathsf{Def}_{\mathsf M}$ of a family $\mathsf M = \{ M_1, \dots, M_r \}$ of right modules over an associative $k$-algebra $A$. By the Generalized Burnside Theorem, due to Laudal, $η$ is an isomorphism when $A$ is finite dimensional, $\mathsf M$ is the family of simple $A$-modules, and $k$ is an algebraically closed field. The purpose of this paper is twofold: First, we prove a form of the Generalized Burnside Theorem that is more general, where there is no assumption on the field $k$. Secondly, we prove that the $\mathcal O$-construction is a closure operation when $A$ is any finitely generated $k$-algebra and $\mathsf M$ is any family of finite dimensional $A$-modules, in the sense that $η_B: B \to \mathcal O^B(\mathsf M)$ is an isomorphism when $B = \mathcal O(\mathsf M)$ and $\mathsf M$ is considered as a family of $B$-modules.
description: 9 pages
On Constructivity and the Rosser Property: a closer look at some Gödelean proofs
Creators: name: Salehi, Saeed
name: Seraji, Payam
Publisher: name: arXiv
Year: 2016
Subjects: subject: Logic (math.LO)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 03F40, 03F30, 03D32

description: The proofs of Kleene, Chaitin and Boolos for Gödel's First Incompleteness Theorem are studied from the perspectives of constructivity and the Rosser property. A proof of the incompleteness theorem has the Rosser property when the independence of the true but unprovable sentence can be shown by assuming only the (simple) consistency of the theory. It is known that Gödel's own proof for his incompleteness theorem does not have the Rosser property, and we show that neither do Kleene's or Boolos' proofs. However, we show that a variant of Chaitin's proof can have the Rosser property. The proofs of Gödel, Rosser and Kleene are constructive in the sense that they explicitly construct, by algorithmic ways, the independent sentence(s) from the theory. We show that the proofs of Chaitin and Boolos are not constructive, and they prove only the mere existence of the independent sentences.
description: 12 pages -- to appear in the Annals of Pure and Applied Logic
Functoriality of automorphic L-invariants and applications
Creators: name: Gehrmann, Lennart
Publisher: name: arXiv
Year: 2017
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11F41 (Primary), 11F67, 11F75, 11F85, 11G05 (Secondary)

description: We study the behaviour of automorphic L-Invariants associated to cuspidal representations of GL(2) of cohomological weight 0 under abelian base change and Jacquet-Langlands lifts to totally definite quaternion algebras. Under a standard non-vanishing hypothesis on automorphic L-functions and some technical restrictions on the automorphic representation and the base field we get a simple proof of the equality of automorphic and arithmetic L-invariants. This together with Spiess' results on p-adic L-functions yields a new proof of the exceptional zero conjecture for modular elliptic curves - at least, up to sign.
description: 14 pages, minor changes, to appear in Doc. Math
Inter-electron interactions and the RKKY potential between H adatoms in graphene
Creators: name: Buividovich, Pavel
name: Smith, Dominik
name: Ulybyshev, Maksim
name: von Smekal, Lorenz
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We use first-principles Quantum Monte-Carlo simulations to study the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between hydrogen adatoms attached to a graphene sheet. We find that the pairwise RKKY interactions at distances of a few lattice spacings are strongly affected by inter-electron interactions, in particular, the potential barrier between widely separated adatoms and the dimer configuration becomes wider and thus harder to penetrate. We also point out that anti-ferrromagnetic and charge density wave orderings have very different effects on the RKKY interaction. Finally, we analyze the stability of several regular adatom superlattices with respect to small displacements of a single adatom, distinguishing the cases of adatoms which populate either both or only one sublattice of the graphene lattice.
description: 7 pages, 8 figures, revised version accepted for publication in Phys. Rev. B
15 Jahre und (k)ein wenig weiser !? Ein persönlicher Blick auf Lessons-Learned
Creators: name: Lindlar, Micky
Publisher: name: Zenodo
Year: 2024

description: Vortrag im Rahmen des MWW-Fachgesprächs "Best Practice Erfahrungen beim Aufbau und Betrieb eines Digitalen (Langzeit-)Archivs" am 29./30.Januar 2024 (Online)
Federating advertisement targeting with Linked Data
Creators: name: Lieber, Sven
name: De Meester, Ben
name: Verborgh, Ruben
name: Dimou, Anastasia
Publisher: name: Zenodo
Year: 2020
Subjects: RDF
decentralized Knowledge Graphs
EcoDaLo
online advertisement
RML
privacy
GDPR

description: The presentation of our paper "EcoDaLo: Federating advertisement targeting with Linked Data" presented at the SEMANTiCS conference 2020.

 Joint work with Ben De Meester, Ruben Verborgh and Anastasia Dimou.

 The related video is online available at YouTube: https://www.youtube.com/watch?v=XP4Eq3eJfeA
Economic Neutral Position: How to best replicate not fully replicable liabilities
Creators: name: Kunz, Andreas
name: Popp, Markus
Publisher: name: arXiv
Year: 2017
Subjects: subject: Risk Management (q-fin.RM)
subject: FOS: Economics and business
subject: Primary: 91B30, Secondary: 60E05, 62P05

description: Financial undertakings often have to deal with liabilities of the form 'non-hedgeable claim size times value of a tradeable asset', e.g. foreign property insurance claims times fx rates. Which strategy to invest in the tradeable asset is risk minimal? We generalize the Gram-Charlier series for the sum of two dependent random variable, which allows us to expand the capital requirements based on value-at-risk and expected shortfall. We derive a stable and fairly model independent approximation of the risk minimal asset allocation in terms of the claim size distribution and the moments of asset return. The results enable a correct and easy-to-implement modularization of capital requirements into a market risk and a non-hedgeable risk component.
description: 26 pages, 6 figures
Patent Retrieval: A Literature Review
Creators: name: Shalaby, Walid
name: Zadrozny, Wlodek
Publisher: name: arXiv
Year: 2017
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: With the ever increasing number of filed patent applications every year, the need for effective and efficient systems for managing such tremendous amounts of data becomes inevitably important. Patent Retrieval (PR) is considered the pillar of almost all patent analysis tasks. PR is a subfield of Information Retrieval (IR) which is concerned with developing techniques and methods that effectively and efficiently retrieve relevant patent documents in response to a given search request. In this paper we present a comprehensive review on PR methods and approaches. It is clear that, recent successes and maturity in IR applications such as Web search cannot be transferred directly to PR without deliberate domain adaptation and customization. Furthermore, state-of-the-art performance in automatic PR is still around average in terms of recall. These observations motivate the need for interactive search tools which provide cognitive assistance to patent professionals with minimal effort. These tools must also be developed in hand with patent professionals considering their practices and expectations. We additionally touch on related tasks to PR such as patent valuation, litigation, licensing, and highlight potential opportunities and open directions for computational scientists in these domains.
Engineering drag currents in Coulomb coupled quantum dots
Creators: name: Lim, Jong Soo
name: Lopez, Rosa
name: Sanchez, David
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The Coulomb drag phenomenon in a Coulomb-coupled double quantum dot system is revisited with a simple model that highlights the importance of simultaneous tunneling of electrons. Previously, cotunneling effects on the drag current in mesoscopic setups have been reported both theoretically and experimentally. However, in both cases the sequential tunneling contribution to the drag current was always present unless the drag level position were too far away from resonance. Here, we consider the case of very large Coulomb interaction between the dots, whereby the drag current needs to be assisted by cotunneling events. As a consequence, a quantum coherent drag effect takes place. Further, we demonstrate that by properly engineering the tunneling probabilities using band tailoring it is possible to control the sign of the drag and drive currents, allowing them to flow in parallel or antiparallel directions. We also show that the drag current can be manipulated by varying the drag gate potential and is thus governed by electron- or hole-like transport.
description: 15 pages, 5 figures; published version
Mutation of Sucrose:Fructan 6-fructosyltransferase (6-SFT) in hexaploid wheat may reduce Fusarium head blight susceptibility
Creators: name: Wanxin Chen
Publisher: name: Zenodo
Year: 2023
Subjects: Sucrose:Fructan 6-fructosyltransferase; haxploid wheat; Fusarium head blight

description: In plants fructans are important storage compounds synthesized from sucrose in many grass species including wheat, which accumulate in stems and are remobilized to spikes and grain post anthesis. Fructans have also been implicated in abiotic stress tolerance. Our previous study, based on Virus-Induced Gene silencing individually of the three fructosyltransferase (FT) genes, 1-SST, 6-SFT and 1-FFT, significantly reduced levels of Fusarium head blight (FHB) disease and lowered concentration of the fungal mycotoxin deoxynivalenol (DON) in wheat spikes, especially in the 6-SFT silenced plants. Metabolome analysis revealed that silencing of the FT genes resulted in altered fructans profile in wheat spikes, while in vitro growth assays revealed that Fusarium. graminearum could effectively utilize some fructans as carbon sources required for growth, indicating fructans could also act as host susceptibility factors contributing to FHB disease severity. Homozygous Cadenza TILLING lines were identified harboring single stop codon mutation respectively on the three 6-SFT homoeologs located on chromosome 4AL, 7AS and 7DS. After inter-crossing, double homozygous mutants of 7D/4A, 7D/7A and 4A/7A were identified and propagated. The generation of triple 6-SFT mutants is in progress. Simultaneously, 6-SFT genome-edited (GE) Cadenza plants were generated, and triple mutants with 60-70 bp deletions of all three homoeologs were identified. Phenotyping of all TILLING and GE fructan biosynthesis pathway mutants for FHB resistance is in progress. Our FT gene knock-out mutant lines will be explored as new resource for future breeding strategies to increase resilience against fungal diseases.
Central stability for the homology of congruence subgroups and the second homology of Torelli groups
Creators: name: Miller, Jeremy
name: Patzt, Peter
name: Wilson, Jennifer C. H.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Algebraic Topology (math.AT)
subject: Group Theory (math.GR)
subject: Geometric Topology (math.GT)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 20J06 (Primary), 11F75, 18A25, 55U10 (Secondary)

description: We prove a representation stability result for the second homology groups of Torelli subgroups of mapping class groups and automorphism groups of free groups. This strengthens the results of Boldsen-Hauge Dollerup and Day-Putman. We also prove a new representation stability result for the homology of certain congruence subgroups, partially improving upon the work of Putman-Sam. These results follow from a general theorem on syzygies of certain modules with finite polynomial degree.
description: Corrections and substantial revisions. 36 pages, 1 figure. To appear in Advances in Mathematics
Interpolation theorem for Marcinkiewicz spaces with applications to Lorentz gamma spaces
Creators: name: Musil, Vít
name: Oľhava, Rastislav
Publisher: name: arXiv
Year: 2017
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46E30, 46B70

description: This paper is devoted to the interpolation principle between spaces of weak type. We characterise interpolation spaces between two Marcinkiewicz spaces in terms of Hardy type operators involving suprema. We study general properties of such operators and their behavior on Lorentz gamma spaces. A particular emphasis is placed on elementary and comprehensive proofs.
description: 20 pages
An evaluation of cosmological models from expansion and growth of structure measurements
Creators: name: Zhai, Zhongxu
name: Blanton, Michael
name: Slosar, Anže
name: Tinker, Jeremy
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We compare a large suite of theoretical cosmological models to observational data from the cosmic microwave background, baryon acoustic oscillation measurements of expansion, Type Ia SNe measurements of expansion, redshift space distortion measurements of the growth of structure, and the local Hubble constant. Our theoretical models include parametrizations of dark energy as well as physical models of dark energy and modified gravity. We determine the constraints on the model parameters, incorporating the redshift space distortion data directly in the analysis. To determine whether models can be ruled out, we evaluate the $p$ value (the probability under the model of obtaining data as bad or worse than the observed data). In our comparison, we find the well known tension of H$_0$ with the other data; no model resolves this tension successfully. Among the models we consider, the large scale growth of structure data does not affect the modified gravity models as a category particularly differently than dark energy models; it matters for some modified gravity models but not others, and the same is true for dark energy models. We compute predicted observables for each model under current observational constraints, and identify models for which future observational constraints will be particularly informative.
description: 35 pages, 33 figures, updated to match the ApJ accepted version