Results for "Sophia Ananiadou"

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A Walk-based Model on Entity Graphs for Relation ExtractionFeb 19 2019We present a novel graph-based neural network model for relation extraction. Our model treats multiple pairs in a sentence simultaneously and considers interactions among them. All the entities in a sentence are placed as nodes in a fully-connected graph ... More
Inter-sentence Relation Extraction with Document-level Graph Convolutional Neural NetworkJun 11 2019Inter-sentence relation extraction deals with a number of complex semantic relationships in documents, which require local, non-local, syntactic and semantic dependencies. Existing methods do not fully exploit such dependencies. We present a novel inter-sentence ... More
Modelling Instance-Level Annotator Reliability for Natural Language Labelling TasksMay 13 2019When constructing models that learn from noisy labels produced by multiple annotators, it is important to accurately estimate the reliability of annotators. Annotators may provide labels of inconsistent quality due to their varying expertise and reliability ... More
Convergence of the self-dual Ginzburg-Landau gradient flowJul 12 2012We prove convergence of the gradient flow of the Ginzburg-Landau energy functional on a Riemann surface in the self-dual Bogomolny case, in Coulomb gauge. The proof is direct and makes use of the associated nonlinear first order differential operators ... More
Observability of sharp phase transitions in neutron starsApr 22 2019With central densities as high as 5-10 times the nuclear saturation density, neutron stars exhibit extreme conditions that cannot be observed elsewhere. They are ideal astrophysical laboratories for probing the composition and properties of cold, ultra-dense ... More
High fidelity quantum gates via analytically solvable pulsesMay 08 2012Jun 05 2012It is shown that a family of analytically solvable pulses can be used to obtain high fidelity quantum phase gates with surprising robustness against imperfections in the system or pulse parameters. Phase gates are important because they can implement ... More
Proceedings 11th Interaction and Concurrency ExperienceOct 04 2018This volume contains the proceedings of ICE'18, the 11th Interaction and Concurrency Experience, which was held in Madrid, Spain on the 20th and 21st of June 2018 as a satellite event of DisCoTec'18. The ICE workshop series features a distinguishing review ... More
Numerical multi-loop calculations with SecDecSep 13 2013The new version 2.1 of the program SecDec is described, which can be used for the factorisation of poles and subsequent numerical evaluation of multi-loop integrals, in particular massive two-loop integrals. The program is not restricted to scalar master ... More
Evaluation d'une requete en SQLMar 25 2009Jun 22 2009The objective of this paper is to show how the interrogation processor responds to SQL interrogation. The interrogation processor is split into two parts. The first, called the interrogation compiler translates an SQL query into a plan of physical execution. ... More
Hartogs' extension theorems on Stein spacesDec 17 2008Mar 24 2009We discuss various known generalizations of the classical Hartogs' extension theorem on Stein spaces with arbitrary singularities and present an analytic proof based on d-bar methods.
Evaporation Prescription for Time-Dependent Density Functional CalculationsAug 30 2012Sep 25 2012Collisions between $^{248}$Cm and $^{48}$Ca are systematically calculated by time-dependent density functional calculations with evaporation prescription. Depending on the incident energy and impact parameter, fusion, fusion-fission, and quasi-fission ... More
Fissibility of compound nucleiDec 01 2012Collisions between $^{248}$Cm and $^{48}$Ca are systematically investigated by time-dependent density functional calculations with evaporation prescription. Depending on the incident energy and impact parameter, fusion, deep-inelastic and fission events ... More
Quasifission dynamics and stability of superheavy systemsNov 30 2016Dec 01 2016Recent experiments revealed intriguing similarities in the $^{64}$Ni+$^{207}$Pb, $^{132}$Xe+$^{208}$Pb, and $^{238}$U+$^{238}$U reactions at energies around the Coulomb barrier. The experimental data indicate that for all systems substantial energy dissipation ... More
Adiabatic limit and the slow motion of vortices in a Chern-Simons-Schrödinger systemMay 07 2009Jun 25 2009We study a nonlinear system of partial differential equations in which a complex field (the Higgs field) evolves according to a nonlinear Schroedinger equation, coupled to an electromagnetic field whose time evolution is determined by a Chern-Simons term ... More
Semiglobal results for d-bar on complex spaces with arbitrary singularities, Part IIMar 23 2009We obtain some L2 results for d-bar on forms that vanish to high order on the singular set of a complex space. As a consequence of our main theorem we obtain weighted L2-solvability results for compactly supported d-bar closed (p,q) forms defined on certain ... More
Geometry and topology of the Kerr photon region in the phase spaceApr 01 2019We study the set of trapped photons of a subcritical (a<M) Kerr spacetime as a subset of the phase space. First, we present an explicit proof that the photons of constant Boyer--Lindquist coordinate radius are the only photons in the Kerr exterior region ... More
Asymptotic properties of certain diffusion ratchets with locally negative driftFeb 05 2012We consider two reflecting diffusion processes $(X_t)_{t \ge 0}$ with a moving reflection boundary given by a non-decreasing pure jump Markov process $(R_t)_{t \ge 0}$. Between the jumps of the reflection boundary the diffusion part behaves as a reflecting ... More
Quasifission dynamics and stability of superheavy systemsNov 30 2016Recent experiments revealed intriguing similarities in the $^{64}$Ni+$^{207}$Pb, $^{132}$Xe+$^{208}$Pb, and $^{238}$U+$^{238}$U reactions at energies around the Coulomb barrier. The experimental data indicate that for all systems substantial energy dissipation ... More
L'entreprise franco-roumaine face au InternetMar 05 2009Jun 23 2009The main goal of the present work is to analyze the activity of the French companies from Romania related to the increasing use of the information and communication technology in the productive field. The convergent assembly of information and communication ... More
Massive non-planar two-loop four-point integrals with SecDec 2.1Mar 05 2013Jun 13 2013We present numerical results for massive non-planar two-loop box integrals entering heavy quark pair production at NNLO, some of which are not known analytically yet. The results have been obtained with the program SecDec 2.1, based on sector decomposition ... More
Numerical evaluation of massive multi-loop integrals with SecDecSep 27 2012The program package SecDec is presented, allowing the numerical evaluation of multi-loop integrals. The restriction to Euclidean kinematics of version 1.0 has been lifted: thresholds can be handled by an automated deformation of the integration contour ... More
Numerical multi-loop calculations with the program SecDecNov 04 2014SecDec is a program which can be used for the evaluation of parametric integrals, in particular multi-loop integrals. For a given set of propagators defining the graph, the program constructs the graph polynomials, factorizes the endpoint singularities, ... More
L2 d-bar cohomology groups of some singular complex spacesJan 10 2011Jul 11 2011Let X be a pure n-dimensional (n>1) complex analytic set in C^N with an isolated singularity at 0. In this paper we express the L2-(0,q)-d-bar-cohomology groups for all q with 0<q<n+1, of a sufficiently small deleted neighborhood of the singular point, ... More
Behavioural types for non-uniform memory accessesFeb 11 2016Concurrent programs executing on NUMA architectures consist of concurrent entities (e.g. threads, actors) and data placed on different nodes. Execution of these concurrent entities often reads or updates states from remote nodes. The performance of such ... More
Fission Dynamics of Compound NucleiSep 27 2012Collisions between $^{248}$Cm and $^{48}$Ca are systematically investigated by time-dependent density functional calculations with evaporation prescription. Depending on the incident energy and impact parameter, fusion, deep-inelastic and quasi-fission ... More
Quasifission dynamics and stability of superheavy systemsNov 30 2016Jan 18 2017Recent experiments revealed intriguing similarities in the $^{64}$Ni+$^{207}$Pb, $^{132}$Xe+$^{208}$Pb, and $^{238}$U+$^{238}$U reactions at energies around the Coulomb barrier. The experimental data indicate that for all systems substantial energy dissipation ... More
Produktion einzelner Top-Quarks in nächst-zu-nächstführender Ordnung der QCD: Der Beitrag der Einschleifenamplituden quadriertOct 18 2013Top quark physics are an appropriate laboratory to study phenomena of the Standard Model and to test the limits of this theory. To obtain a higher precision for top quark predictions, the next-to-next-to-leading order (NNLO) in the pertubative expansion ... More
Tips learned from panchromatic modeling of AGNsMar 04 2019I will review the tips learned from panchromatic modeling of active galactic nuclei (AGNs), based on our recent work to study the relationship between AGN and star formation (SF). Several AGN SED models are compared, and signifficant AGN contribution ... More
Les technologies de l'information et de la communication au niveau mondial et en Roumanie dans les dernieres anneesApr 23 2009Jun 22 2009The level of development of the electronic communication market and of the information technology, the indicators regarding the penetration of Internet and the level of penetration of the connections in wide band, the integration degree of the Tic application ... More
Two-loop applications of the program SecDecNov 25 2013SecDec is a program which can be used for the factorisation of poles and subsequent numerical evaluation of multi-loop integrals, in particular massive two-loop integrals. We show applications to two-loop master integrals entering the calculation of top ... More
The Curses of Blockchain DecentralizationOct 06 2018Decentralization, which has backed the hyper growth of many blockchains, comes at the cost of scalability. To understand this fundamental limitation, this paper proposes a quantitative measure of blockchain decentralization, and discusses its implications ... More
Some L2 results for d-bar on projective varieties with general singularitiesOct 18 2006Let X be an irreducible n-dimensional projective variety in CP^N with arbitrary singular locus. We prove that the L2-(p,1)-d-bar cohomology groups (with respect to the Fubini-Study metric) of the regular part of X are finite dimensional.
Tidal deformability with sharp phase transitions in (binary) neutron starsOct 25 2018Apr 08 2019The neutron star tidal deformability is a critical parameter which determines the pre-merger gravitational-wave signal in a neutron star merger. In this article, we show how neutron star tidal deformabilities behave in the presence of one or two sharp ... More
The star formation history of the Sculptor Dwarf Irregular GalaxyNov 01 2012[abridged] We study the resolved stellar populations and derive the SFH of the SDIG, a gas-rich dwarf galaxy member of the NGC7793 subgroup in the Sculptor group. We construct a CMD using archival HST observations and examine its stellar content. We derive ... More
A topological transistor of waves via the Euler characteristicFeb 07 2017Although topological materials have recently seen tremendous development, their applications have remained elusive. Simultaneously, there exists considerable interest in pushing the limits of topological materials, including the exploration of new forms ... More
The hidden role of coupled wave network topology on the dynamics of nonlinear latticesMar 05 2018Sep 11 2018In most systems, its division into interacting constituent elements gives rise to a natural network structure. Analyzing the dynamics of these elements and the topology of these natural graphs gave rise to the fields of (nonlinear) dynamics and network ... More
Beyond electronics, beyond optics: single circuit parallel computing with phononsJan 13 2013Phononic computing -- the use of (typically thermal) vibrations for information processing -- is a nascent technology; its capabilities are still being discovered. We analyze an alternative form of phononic computing inspired by optical, rather than electronic, ... More
Spin-photon entanglement interfaces in silicon carbide defect centersAug 11 2016Nov 20 2016Optically active spins in solid-state systems can be engineered to emit photons that are entangled with the spin in the solid. This allows for applications such as quantum communications, quantum key distribution, and distributed quantum computing. Recently, ... More
Spin-photon entanglement interfaces in silicon carbide defect centersAug 11 2016Optically active spins in solid-state systems can be engineered to emit photons that are entangled with the spin in the solid. This allows for applications such as quantum communications, quantum key distribution, and distributed quantum computing. Recently, ... More
Spectrum of the Laplacian on the Vicsek Set "with no loose ends"Nov 04 2016We study the spectral properties of a fractal VNLE obtained from the standard Vicsek set VS by making a countable number of identifications of points so that all the line segments in VS become circles in VNLE. We show that the standard Laplacian on VNLE ... More
Sum of squares decompositions of potential energy surfacesAug 11 2005The difficulty in exploring potential energy surfaces, which are nonconvex, stems from the presence of many local minima, typically separated by high barriers and often disconnected in configurational space. We obtain the global minimum on model potential ... More
Tidal deformability with sharp phase transitions in (binary) neutron starsOct 25 2018Nov 08 2018The neutron star tidal deformability is a critical parameter which determines the pre-merger gravitational wave signal in a neutron star merger. In this article, we show how neutron star tidal deformabilities behave in the presence of one or two sharp ... More
Analysis of the excited-state absorption spectral bandshape of oligofluorenesDec 18 2009Apr 29 2010We present ultrafast transient absorption spectra of two oligofluorene derivatives in dilute solution. These spectra display clear vibronic structure, which we analyze rigorously using a time-dependent formalism of absorption to extract the principal ... More
Characteristics of hybrid compact stars with a sharp hadron-quark interfaceAug 06 2015Mar 21 2016We describe two aspects of the physics of hybrid stars that have a sharp interface between a core of quark matter and a mantle of nuclear matter. Firstly, we analyze the mass-radius relation. We describe a generic "Constant Speed of Sound" (CSS) parameterization ... More
Analytical approach to swift nonleaky entangling gates in superconducting qubitsNov 03 2014Apr 09 2015We develop schemes for designing pulses that implement fast and precise entangling quantum gates in superconducting qubit systems despite the presence of nearby harmful transitions. Our approach is based on purposely involving the nearest harmful transition ... More
A Unified Approach to Nonlinear Transformation MaterialsMar 09 2017The advances in geometric approaches to optical devices due to transformation optics has led to the development of cloaks, concentrators, and other devices. It has also been shown that transformation optics can be used to gravitational fields from general ... More
Unparticles as the Holographic Dual of Gapped AdS GravitySep 10 2015Naively applying holographic duality to gapped gravity on Anti de Sitter (AdS) space seems to suggest that the stress tensor of the field theory dual cannot be conserved. On the other hand, by symmetry arguments, it seems that the dual should not violate ... More
On Effective Actions from HolographyFeb 21 2014Inspired by holographic Wilsonian renormalization, we propose a novel perspective on the low-energy effective actions of confining gauge theories with gravity duals. By identifying the IR-boundary value of a certain bulk field as overlapping with the ... More
Theory of dynamic nuclear polarization and feedback in quantum dotsDec 19 2013Apr 06 2014An electron confined in a quantum dot interacts with its local nuclear spin environment through the hyperfine contact interaction. This interaction combined with external control and relaxation or measurement of the electron spin allows for the generation ... More
Electron-nuclear dynamics in a quantum dot under non-unitary electron controlJan 24 2011Jun 27 2011We introduce a method for solving the problem of an externally controlled electron spin in a quantum dot interacting with host nuclei via the hyperfine interaction. Our method accounts for generalized (non-unitary) evolution effected by external controls ... More
The Bergman kernel on the intersection of two balls in C^2Apr 16 2002We obtain an asymptotic expansion and some regularity results for the Bergman kernel on the intersection of two balls in C^2.
Light-front analysis of the Casimir effectJun 20 2013The Casimir force between conducting plates at rest in an inertial frame is usually computed in equal-time quantization, the natural choice for the given boundary conditions. We show that the well-known result obtained in this way can also be obtained ... More
BRST-invariant Pauli-Villars regularization of QCDJun 17 2015We extend the QCD Lagrangian to include Pauli-Villars (PV) gluons, quarks, and ghosts in such a way as to retain BRST invariance in an arbitrary covariant gauge. The extended Lagrangian can provide a starting point for nonperturbative calculations in ... More
Using Local Alignments for Relation RecognitionJan 16 2014This paper discusses the problem of marrying structural similarity with semantic relatedness for Information Extraction from text. Aiming at accurate recognition of relations, we introduce local alignment kernels and explore various possibilities of using ... More
Weak-strong uniqueness of dissipative measure-valued solutions for polyconvex elastodynamicsSep 29 2011For the equations of elastodynamics with polyconvex stored energy, and some related simpler systems, we define a notion of dissipative measure-valued solution and show that such a solution agrees with a classical solution with the same initial data when ... More
Convergence of the light-front coupled-cluster method in quenched scalar Yukawa theoryMar 06 2019We explore the convergence of the light-front coupled-cluster (LFCC) method in the context of two-dimensional quenched scalar Yukawa theory. This theory is simple enough for higher-order LFCC calculations to be relatively straightforward. The quenching ... More
Transitioning from equal-time to light-front quantization in $φ_2^4$ theoryNov 05 2018We implement the limiting procedure of Hornbostel for the quantization of two-dimensional $\phi^4$ theory in a sequence of coordinate systems that interpolate between equal-time and light-front coordinates. This allows computation of the vacuum state ... More
Photonic graph state generation from quantum dots and color centers for quantum communicationsJan 09 2018Aug 17 2018Highly entangled graph states of photons have applications in universal quantum computing and in quantum communications. In the latter context, they have been proposed as the key ingredient in the establishment of long-distance entanglement across quantum ... More
Dynamic Nuclear Polarization from Topological Insulator Helical Edge StatesNov 06 2017Dec 11 2018Topological insulators are promising for spintronics and related technologies due to their spin-momentum-locked edge states, which are protected by time-reversal symmetry. In addition to the unique fundamental physics that arises in these systems, the ... More
Optically generated 2-dimensional photonic cluster state from coupled quantum dotsMar 11 2010We propose a method to generate a two-dimensional cluster state of polarization encoded photonic qubits from two coupled quantum dot emitters. We combine the recent proposal [N. H. Lindner and T. Rudolph, Phys. Rev. Lett. 103, 113602 (2009)] for generating ... More
SecDec: A tool for numerical multi-loop calculationsJun 21 2012The version 2.0 of the program SecDec is described, which can be used for the extraction of poles within dimensional regularisation from multi-loop integrals as well as phase space integrals. The numerical evaluation of the resulting finite functions ... More
Quantised orbital angular momentum transfer and magnetic dichroism in the interaction of electron vortices with matterNov 14 2011Feb 07 2012Following the very recent experimental realisation of electron vortices, we consider their interaction with matter, in particular the transfer of orbital angular momentum in the context of electron energy loss spectroscopy, and the recently observed dichroism ... More
Molecular Doping of Electrochemically Prepared Triazine-based Carbon Nitride by 2,4,6-Triaminopyrimidine for Improved Photocatalytic PropertiesDec 14 2018The copolymerization of melamine with 2,4,6-triaminopyrimidine (TAP) in an electrochemical induced polymerization process leads to the formation of molecular doped poly (triazine imide) (PTI). The polymerization is based on the electrolysis of water and ... More
Strangelet dwarfsNov 16 2011Apr 04 2012If the surface tension of quark matter is low enough, quark matter is not self bound. At sufficiently low pressure and temperature, it will take the form of a crystal of positively charged strangelets in a neutralizing background of electrons. In this ... More
Submillimetre surveys: The prospects for HerschelJun 22 2009Using the observed submillimetre source counts, from 250-1200 microns (including the most recent 250, 350 and 500 micron counts from BLAST), we present a model capable of reproducing these results, which is used as a basis to make predictions for upcoming ... More
Long-distance entangling gates between quantum dot spins mediated by a superconducting resonatorFeb 15 2019Recent experimental work with silicon qubits has shown that it is possible, using an inhomogeneous magnetic field, to strongly couple modes of a microwave resonator to the spin of a single electron trapped in a double quantum dot. This suggests the possibility ... More
Self-supervised learning of a facial attribute embedding from videoAug 21 2018We propose a self-supervised framework for learning facial attributes by simply watching videos of a human face speaking, laughing, and moving over time. To perform this task, we introduce a network, Facial Attributes-Net (FAb-Net), that is trained to ... More
Complete two-loop QCD contributions to the lightest Higgs-boson mass in the MSSM with complex parametersFeb 27 2018Jul 25 2018Higher-order corrections to the MSSM Higgs-boson masses are desirable for accurate predictions currently testable at the LHC. By comparing the prediction with the measured value of the discovered Higgs signal, viable parameter regions can be inferred. ... More
Local $L^2$ results for $\bar\partial$: The isolated singularities caseJan 14 2004Jan 30 2004Let $X$ be a pure n-dimensional complex analytic set in $\mathbb{C}^N$ with an isolated singularity at 0. We study the Cauchy-Riemann operator on a deleted neighborhood of the singular point 0 in $X$.
Optically induced spin gates in coupled quantum dots using the electron-hole exchange interactionSep 11 2008We propose a fast optically induced two-qubit \textsc{c-phase} gate between two resident spins in a pair of coupled quantum dots. An excited bound state which extends over the two dots provides an effective electron-electron exchange interaction. The ... More
Stability conditions for spatially modulated phasesJul 14 2013Aug 04 2013We introduce a novel set of stability conditions for vacua with broken Lorentz symmetry. The first class of conditions require that the energy be minimized under small geometric deformations, which translates into requiring the positivity of a "stiffness" ... More
Baryon Number-Induced Chern-Simons Couplings of Vector and Axial-Vector Mesons in Holographic QCDApr 12 2007We show that holographic models of QCD predict the presence of a Chern-Simons coupling between vector and axial-vector mesons at finite baryon density. In the AdS/CFT dictionary, the coefficient of this coupling is proportional to the baryon number density, ... More
Relativistic energy of a moving spherical capacitorNov 28 2007We discuss the relativistic transformation of the energy of a charged spherical capacitor. The energy stored in the electromagnetic fields observed by an uniformly moving frame is related to that of the rest frame by a factor different from $\gamma $. ... More
A solvable quantum model of dynamic nuclear polarization in quantum dotsNov 26 2018Jan 30 2019We present a quantum mechanical theory of optically induced dynamic nuclear polarization applicable to quantum dots and other interacting spin systems. The exact steady state of the optically driven coupled electron-nuclear system is calculated under ... More
Interplay of valley polarization and dynamic nuclear polarization in 2D transition metal dichalcogenidesMay 10 2017Aug 25 2017The interplay of Ising spin-orbit coupling and non-trivial band topology in transition metal dichalcogenides (TMDs) produces anomalous transport and optical properties that are very different from a regular 2D electron gas. The spin-momentum locking of ... More
Quark matter cores in neutron starsApr 10 2019We review the prospects for detecting quark matter in neutron star cores. We survey the proposed signatures and emphasize the importance of data from neutron star mergers, which provide access to dynamical properties that operate on short timescales that ... More
Perturbation theory for cosmologies with non-linear structureJul 04 2017Mar 27 2018The next generation of cosmological surveys will operate over unprecedented scales, and will therefore provide exciting new opportunities for testing general relativity. The standard method for modelling the structures that these surveys will observe ... More
Influence of Nuclear Reaction Rate Uncertainties on Neutron Star Properties Extracted From X-ray Burst Model-Observation ComparisonsDec 18 2018Type-I X-ray bursts can be used to determine properties of accreting neutron stars via comparisons between model calculations and astronomical observations, exploiting the sensitivity of models to astrophysical conditions. However, the sensitivity of ... More
Stochastic kinetics of viral capsid assembly based on detailed protein structuresOct 28 2006We present a generic computational framework for the simulation of viral capsid assembly which is quantitative and specific. Starting from PDB files containing atomic coordinates, the algorithm builds a coarse grained description of protein oligomers ... More
Phonon Diodes and Transistors from Magneto-acousticsJan 25 2014By sculpting the magnetic field applied to magneto-acoustic materials, phonons can be used for information processing. Using a combination of analytic and numerical techniques, we demonstrate designs for diodes (isolators) and transistors that are independent ... More
Median bias reduction in random-effects meta-analysis and meta-regressionJan 26 2018May 23 2018Random-effects models are frequently used to synthesise information from different studies in meta-analysis. While likelihood-based inference is attractive both in terms of limiting properties and of implementation, its application in random-effects meta-analysis ... More
Star formation laws in the Andromeda galaxy: gas, stars, metals and the surface density of star formationDec 21 2015We use hierarchical Bayesian regression analysis to investigate star formation laws in the Andromeda galaxy (M31) in both local (30, 155, and 750pc) and global cases. We study and compare the well-known Kennicutt-Schmidt law, the extended Schmidt law ... More
Using hydrodynamical simulations of stellar atmospheres for periodogram standardization : application to exoplanet detectionJan 27 2016Our aim is to devise a detection method for exoplanet signatures (multiple sinusoids) that is both powerful and robust to partially unknown statistics under the null hypothesis. In the considered application, the noise is mostly created by the stellar ... More
Generic conditions for stable hybrid starsFeb 19 2013Oct 13 2013We study the mass-radius curve of hybrid stars, assuming a single first-order phase transition between nuclear and quark matter, with a sharp interface between the quark matter core and nuclear matter mantle. We use a generic parameterization of the quark ... More
X2Face: A network for controlling face generation by using images, audio, and pose codesJul 27 2018The objective of this paper is a neural network model that controls the pose and expression of a given face, using another face or modality (e.g. audio). This model can then be used for lightweight, sophisticated video and image editing. We make the following ... More
Announcement as effort on topological spacesJun 24 2016We propose a multi-agent logic of knowledge, public and arbitrary announcements, that is interpreted on topological spaces in the style of subset space semantics. The arbitrary announcement modality functions similarly to the effort modality in subset ... More
Numerical evaluation of multi-loop integrals for arbitrary kinematics with SecDec 2.0Apr 18 2012May 29 2013We present the program SecDec 2.0 which contains various new features: First, it allows the numerical evaluation of multi-loop integrals with no restriction on the kinematics. Dimensionally regulated ultraviolet and infrared singularities are isolated ... More
Spectroscopic versus Photometric Metallicities: Milky Way Dwarf Spheroidal Companions as a Test CaseMay 30 2011Aims. The method of deriving photometric metallicities using red giant branch stars is applied to resolved stellar populations under the common assumption that they mainly consist of single-age old stellar populations. We explore the effect of the presence ... More
Dwarf spheroidals in the M81 Group - Metallicity distribution functions and population gradientsMar 03 2010We study the dwarf spheroidal galaxies in the nearby M81 group in order to construct their photometric metallicity distributions and to investigate the potential presence of population gradients. We select all the dwarf spheroidals with available Hubble ... More
Semiglobal results for $\bar\partial$ on a complex space with arbitrary singularitiesJan 14 2004We obtain some $L^2$ results for the Cauchy-Riemann operator on forms that vanish to high order near the singular set of a complex space.
Generation of arbitrary all-photonic graph states from quantum emittersNov 15 2018May 10 2019We present protocols to generate arbitrary photonic graph states from quantum emitters that are in principle deterministic. We focus primarily on two-dimensional cluster states of arbitrary size due to their importance for measurement-based quantum computing. ... More
Phase conversion dissipation in multicomponent compact starsApr 21 2014Dec 10 2015We propose a mechanism for the damping of density oscillations in multicomponent compact stars. The mechanism is the periodic conversion between different phases, i.e., the movement of the interface between them, induced by pressure oscillations in the ... More
Theory of fast optical spin rotation in a quantum dot based on geometric phases and trapped statesMar 03 2007A method is proposed for the optical rotation of the spin of an electron in a quantum dot using excited trion states to implement operations up to two orders of magnitude faster than those of most existing proposals. Key ingredients are the geometric ... More
Holographic Josephson Junctions and Berry holonomy from D-branesJul 09 2012We construct a holographic model for Josephson junctions with a defect system of a Dp brane intersecting a D(p+2) brane. In addition to providing a geometrical picture for the holographic dual, this leads us very naturally to suggest the possibility of ... More
Deformation Constraints on Solitons and D-branesJun 04 2013We derive a set of constraints on soliton solutions using geometric deformations, and transformations by internal symmetries with space-dependent parameters. We show that Derrick's theorem and a more complete set of constraints due to Manton are special ... More
Bayesian Networks, Total Variation and RobustnessNov 17 2018Now that Bayesian Networks (BNs) have become widely used, an appreciation is developing of just how critical an awareness of the sensitivity and robustness of certain target variables are to changes in the model. When time resources are limited, such ... More
Deterministic generation of all-photonic quantum repeaters from solid-state emittersDec 12 2016Oct 30 2017Quantum repeaters are nodes in a quantum communication network that allow reliable transmission of entanglement over large distances. It was recently shown that highly entangled photons in so-called graph states can be used for all-photonic quantum repeaters, ... More
Deterministic generation of arbitrary all-photonic graph states from quantum emittersNov 15 2018We present protocols to generate arbitrary photonic graph states from quantum emitters that are in principle deterministic. We focus primarily on two-dimensional cluster states of arbitrary size due to their importance for measurement-based quantum computing. ... More
Signatures for quark matter from multi-messenger observationsApr 10 2019Apr 12 2019We review the prospects for detecting quark matter in neutron star cores. We survey the proposed signatures and emphasize the importance of data from neutron star mergers, which provide access to dynamical properties that operate on short timescales that ... More
Allee effects in a Ricker-type predator-prey systemApr 22 2014We study a discrete host-parasitoid system where the host population follows the classical Ricker functional form and is also subject to Allee effects. We determine basins of attraction of the local attractors of the single population model when the host ... More