cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Multiterminal ballistic Josephson junctions coupled to normal leads
Creators: name: Mélin, Régis
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Multiterminal Josephson junctions have aroused considerable theoretical interest recently and numerous works aim at putting the predictions of correlations among Coopers (i.e. the so-called quartets) and simulation of topological matter to the test of experiments. The present paper is motivated by recent experimental investigation from the Harvard group reporting $h/4e$-periodic quartet signal in a four-terminal configuration containing a loop pierced by magnetic flux, together with inversion controlled by the bias voltage, i.e. the quartet signal can be larger at half-flux quantum than in zero magnetic field. Here, we theoretically focus on devices consisting of finite-size quantum dots connected to four superconducting and to a normal lead. In addition to presenting numerical calculations of the quartet signal within a simplified modeling, we reduce the device to a non-Hermitian Hamiltonian in the infinite-gap limit. Then, relaxation has the surprising effect of producing sharp peaks and log-normal variations in the voltage-sensitivity of the quartet signal in spite of the expected moderate fluctuations in the two-terminal DC-Josephson current. The phenomenon is reminiscent of a resonantly driven harmonic oscillator having amplitude inverse proportional to the damping rate, and of the thermal noise of a superconducting weak link, inverse proportional to the Dynes parameter. Perspectives involve quantum bath engineering multiterminal Josephson junctions in the circuits of cavity quantum electrodynamics.
description: 23 pages, 11 figures, second revision of the manuscript, changes in the presentation and new section on the low-voltage limit
Learning quantum dynamics with latent neural ODEs
Creators: name: Choi, Matthew
name: Flam-Shepherd, Daniel
name: Kyaw, Thi Ha
name: Aspuru-Guzik, Alán
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The core objective of machine-assisted scientific discovery is to learn physical laws from experimental data without prior knowledge of the systems in question. In the area of quantum physics, making progress towards these goals is significantly more challenging due to the curse of dimensionality as well as the counter-intuitive nature of quantum mechanics. Here, we present the QNODE, a latent neural ODE trained on expectation values of closed and open quantum systems dynamics. It can learn to generate such measurement data and extrapolate outside of its training region that satisfies the von Neumann and time-local Lindblad master equations for closed and open quantum systems respectively in an unsupervised means. Furthermore, the QNODE rediscovers quantum mechanical laws such as the Heisenberg's uncertainty principle in a data-driven way, without any constraint or guidance. Additionally, we show that trajectories that are generated from the QNODE that are close in its latent space have similar quantum dynamics while preserving the physics of the training system.
description: 11 Pages. 8 Figures. This is a resubmission. We added more results and plots for more quantitative analysis
Peer Review, Bibliometrie, Altmetrics – gibt es einen Königsweg bei Evaluierungen?
Creators: name: Mittermaier, Bernhard
Publisher: name: Forschungzentrum Jülich
Year: 2023

description: Workshop verTRACKteInfrastruktur?!, Stuttgart, Germany, 28 Sep 2023 - 29 Sep 2023
Johannes Reuchlin, Les Besicles (Augenspiegel) suivi de Vie de Reuchlin, par Philipp Melanchthon. Traduit par Hélène Feydy, Delphine Viellard et Jean-Christophe Saladin, Paris (Les Belles Lettres) 2022
Creators: name: Schillinger, Jean
Publisher: name: Francia-Recensio
Year: 2023

description: Johannes Reuchlin, Les Besicles (Augenspiegel) suivi de Vie de Reuchlin, par Philipp Melanchthon. Traduit par Hélène Feydy, Delphine Viellard et Jean-Christophe Saladin, Paris (Les Belles Lettres) 2022, 447 p. (Le Miroir des Humanistes, 21), ISBN 978-2-251-45342-2, EUR 55,00.
description: Francia-Recensio, 2023/2
Quantum probabilities from quantum entanglement: Experimentally unpacking the Born rule
Creators: name: Harris, Jérémie
name: Bouchard, Frédéric
name: Santamato, Enrico
name: Zurek, Wojciech H.
name: Boyd, Robert W.
name: Karimi, Ebrahim
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Born rule, a foundational axiom used to deduce probabilities of events from wavefunctions, is indispensable in the everyday practice of quantum physics. It is also key in the quest to reconcile the ostensibly inconsistent laws of the quantum and classical realms, as it confers physical significance to reduced density matrices, the essential tools of decoherence theory. Following Bohr's Copenhagen interpretation, textbooks postulate the Born rule outright. However, recent attempts to derive it from other quantum principles have been successful, holding promise for simplifying and clarifying the quantum foundational bedrock. A major family of derivations is based on envariance, a recently discovered symmetry of entangled quantum states. Here, we identify and experimentally test three premises central to these envariance-based derivations, thus demonstrating, in the microworld, the symmetries from which the Born rule is derived. Further, we demonstrate envariance in a purely local quantum system, showing its independence from relativistic causality.
description: 21 pages, 6 figures, 6 appendices - Submitted!
Stability and performance analysis of NMPC: Detectable stage costs and general terminal costs
Creators: name: Köhler, Johannes
name: Zeilinger, Melanie N.
name: Grüne, Lars
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We provide a stability and performance analysis for nonlinear model predictive control (NMPC) schemes subject to input constraints. Given an exponential stabilizability and detectability condition w.r.t. the employed state cost, we provide a sufficiently long prediction horizon to ensure asymptotic stability and a desired performance bound w.r.t. the infinite-horizon optimal controller. Compared to existing results, the provided analysis is applicable to positive semi-definite (detectable) cost functions, provides tight bounds using a linear programming analysis, and allows for a seamless integration of general positive-definite terminal cost functions in the analysis. The practical applicability of the derived theoretical results are demonstrated with numerical examples.
description: This is the accepted version of the paper in IEEE Transaction on Automatic Control, 2023. This version contains additionally the proof of Theorem 7 in the appendix
Anisotropy of the monomer random walk in a polymer melt: local-order and connectivity effects
Creators: name: Bernini, S.
name: Leporini, D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The random walk of a bonded monomer in a polymer melt is anisotropic due to local order and bond connectivity. We investigate both effects by molecular-dynamics simulations on melts of fully-flexible linear chains ranging from dimers ($M=2$) up to entangled polymers ($M=200$). The corresponding atomic liquid is also considered as reference system. To disentangle the influence of the local geometry and the bond arrangements, and reveal their interplay, we define suitable measures of the anisotropy emphasising either the former or the latter aspect. Connectivity anisotropy, as measured by the correlation between the initial bond orientation and the direction of the subsequent monomer displacement, shows a slight enhancement due to the local order at times shorter than the structural relaxation time. At intermediate times - when the monomer displacement is comparable to the bond length - a pronounced peak and then decays slowly as $t^{-1/2}$, becoming negligible when the displacements is as large as about five bond lengths, i.e. about four monomer diameters or three Kuhn lengths. Local-geometry anisotropy, as measured by the correlation between the initial orientation of a characteristic axis of the Voronoi cell and the subsequent monomer dynamics, is affected at shorter times than the structural relaxation time by the cage shape with antagonistic disturbance by the connectivity. Differently, at longer times, the connectivity favours the persistence of the local-geometry anisotropy which vanishes when the monomer displacement exceeds the bond length. Our results strongly suggest that the sole consideration of the local order is not enough to understand the microscopic origin of the rattling amplitude of the trapped monomer in the cage of the neighbours.
description: 22 pages, 10 figures
LTL under reductions with weaker conditions than stutter-invariance
Creators: name: Paviot-Adet, Emmanuel
name: Poitrenaud, Denis
name: Renault, Etienne
name: Thierry-Mieg, Yann
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Computer and information sciences

description: Verification of properties expressed as-regular languages such as LTL can benefit hugely from stutter-insensitivity, using a diverse set of reduction strategies. However properties that are not stutter-insensitive, for instance due to the use of the neXt operator of LTL or to some form of counting in the logic, are not covered by these techniques in general. We propose in this paper to study a weaker property than stutter-insensitivity. In a stutter insensitive language both adding and removing stutter to a word does not change its acceptance, any stuttering can be abstracted away; by decomposing this equivalence relation into two implications we obtain weaker conditions. We define a shortening insensitive language where any word that stutters less than a word in the language must also belong to the language. A lengthening insensitive language has the dual property. A semi-decision procedure is then introduced to reliably prove shortening insensitive properties or deny lengthening insensitive properties while working with a reduction of a system. A reduction has the property that it can only shorten runs. Lipton's transaction reductions or Petri net agglomerations are examples of eligible structural reduction strategies. An implementation and experimental evidence is provided showing most nonrandom properties sensitive to stutter are actually shortening or lengthening insensitive. Performance of experiments on a large (random) benchmark from the model-checking competition indicate that despite being a semi-decision procedure, the approach can still improve state of the art verification tools.
description: Formal Techniques for Distributed Objects, Components, and Systems FORTE 2022, Jun 2022, Lucia, Italy
[Rezension zu:] Heinrich Bullinger, Briefe von Januar bis Mai 1546, bearb. von Reinhard Bodenmann/ Alexandra Kess/Judith Steiniger (= Heinrich Bullinger Abt. 2: Briefwechsel), Zürich, Theologischer Verlag Zürich, 2014
Creators: name: Scheidegger, Christian
Publisher: name: Academic Press
Year: 2015
Subjects: subject: 270 Geschichte des Christentums, Kirchengeschichte
subject: 808 Rhetorik, Sammlungen von Literatur
subject: Zürich
subject: Bullinger, Heinrich
subject: Brief
subject: Briefsammlung
subject: Reformationsgeschichte
subject: Rezension

description: In: Schweizerische Zeitschrift für Religions- und Kulturgeschichte 109 (2015), S. 434-435
Well-posedness for the Navier-Stokes equations with datum in Sobolev-Fourier-Lorentz spaces
Creators: name: Khai, D. Q.
name: Tri, N. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35Q30

description: In this note, for $s \in \mathbb R$ and $1 \leq p, r \leq \infty$, we introduce and study Sobolev-Fourier-Lorentz spaces $\dot{H}^s_{\mathcal{L}^{p, r}}(\mathbb{R}^d)$. In the family spaces $\dot{H}^s_{\mathcal{L}^{p, r}}(\mathbb{R}^d)$, the critical invariant spaces for the Navier-Stokes equations correspond to the value $s = \frac{d}{p} - 1$. When the initial datum belongs to the critical spaces $\dot{H}^{\frac{d}{p} - 1}_{\mathcal{L}^{p,r}}(\mathbb{R}^d)$ with $d \geq 2, 1 \leq p
description: 35 pages
[Rezension zu:] Heinrich Bullinger, Briefe von Juni bis September 1546 (= Heinrich Bullinger Werke, Abt. 2: Briefwechsel, Band 17), und Briefe von Oktober bis Dezember 1546 (= ebd., Band 18), bearb. von Reinhard Bodenmann/Alexandra Kess/Judith Steiniger, Zürich, Theologischer Verlag Zürich, 2015 und 2017
Creators: name: Scheidegger, Christian
Publisher: name: Academic Press
Year: 2017
Subjects: subject: 270 Geschichte des Christentums, Kirchengeschichte
subject: 808 Rhetorik, Sammlungen von Literatur
subject: Zürich
subject: Bullinger, Heinrich
subject: Brief
subject: Briefsammlung
subject: Reformationsgeschichte
subject: Rezension

description: In: Schweizerische Zeitschrift für Religions- und Kulturgeschichte 111 (2017), S. 452-454
A note on Humphreys' conjecture on blocks
Creators: name: Westaway, Matthew
Publisher: name: arXiv
Year: 2021
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: Primary: 17B35, 17B50, Secondary: 16D70, 17B10

description: Humphreys' conjecture on blocks parametrises the blocks of reduced enveloping algebras $U_χ({\mathfrak g})$, where ${\mathfrak g}$ is the Lie algebra of a reductive algebraic group over an algebraically closed field of characteristic $p>0$ and $χ\in{\mathfrak g}^{*}$. It is well-known to hold under Jantzen's standard assumptions. We note here that it holds under slightly weaker assumptions, by utilising the full generality of certain results in the literature. We also provide a new approach to prove the result for ${\mathfrak g}$ of type $G_2$ in characteristic 3, a case in which the previously mentioned weaker assumptions do not hold. This approach requires some dimensional calculations for certain centralisers, which we conduct in the Appendix for all the exceptional Lie algebras in bad characteristic.
description: Main paper: 8 pages; Appendix: 8 pages. Version 2: Table added
Orbital stability of two-component peakons
Creators: name: He, Cheng
name: Liu, Xiaochuan
name: Qu, Changzheng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We prove that the two-component peakon solutions are orbitally stable in the energy space. The system concerned here is a two-component Novikov system, which is an integrable multicomponent extension of the integrable Novikov equation. We improve the method for the scalar peakons to the two-component case with genuine nonlinear interactions by establishing optimal inequalities for the conserved quantities involving the coupled structures. Moreover, we also establish the orbital stability for the train-profiles of these two-component peakons by using the refined analysis based on monotonicity of the local energy and an induction method.
description: Accepted for publication
The complexity of approximations for epistemic synthesis (extended abstract)
Creators: name: Huang, Xiaowei
name: van der Meyden, Ron
Publisher: name: arXiv
Year: 2016
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: Epistemic protocol specifications allow programs, for settings in which multiple agents act with incomplete information, to be described in terms of how actions are related to what the agents know. They are a variant of the knowledge-based programs of Fagin et al [Distributed Computing, 1997], motivated by the complexity of synthesizing implementations in that framework. The paper proposes an approach to the synthesis of implementations of epistemic protocol specifications, that reduces the problem of finding an implementation to a sequence of model checking problems in approximations of the ultimate system being synthesized. A number of ways to construct such approximations is considered, and these are studied for the complexity of the associated model checking problems. The outcome of the study is the identification of the best approximations with the property of being PTIME implementable.
description: In Proceedings SYNT 2015, arXiv:1602.00786
The onset, evolution and magnetic braking of vortex lattice instabilities in nanostructured superconducting films
Creators: name: Adami, O. -A.
name: Jelić, Ž. L.
name: Xue, C.
name: Abdel-Hafiez, M.
name: Hackens, B.
name: Moshchalkov, V. V.
name: Milošević, M. V.
name: Van de Vondel, J.
name: Silhanek, A. V.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In 1976 Larkin and Ovchinnikov [Sov. Phys. JETP 41, 960 (1976)] predicted that vortex matter in superconductors driven by an electrical current can undergo an abrupt dynamic transition from a flux-flow regime to a more dissipative state at sufficiently high vortex velocities. Typically this transition manifests itself as a large voltage jump at a particular current density, so-called instability current density $J^*$, which is smaller than the depairing current. By tuning the effective pinning strength in Al films, using an artificial periodic pinning array of triangular holes, we show that a unique and well defined instability current density exists if the pinning is strong, whereas a series of multiple voltage transitions appear in the relatively weaker pinning regime. This behavior is consistent with time-dependent Ginzburg-Landau simulations, where the multiple-step transition can be unambiguously attributed to the progressive development of vortex chains and subsequently phase-slip lines. In addition, we explore experimentally the magnetic braking effects, caused by a thick Cu layer deposited on top of the superconductor, on the instabilities and the vortex ratchet effect
title: Einbandkunst verstehen
title: Konrad von Rabenau und die Einbandforschung im deutschen Sprachraum
titleType: Subtitle
Creators: name: Scheidegger, Christian
Publisher: name: Zentralbibliothek Zürich
Year: 2016
Subjects: subject: 002 Das Buch
subject: 686 Drucken und verwandte Tätigkeiten
subject: Bucheinband
subject: Rabenau, Konrad von
subject: Kunstgeschichte
subject: Buch

description: In: Librarium 59:2-3 (2016), S. 127-135
[Rezension zu:] Heinrich Bullinger, Briefe des Jahres 1545, bearb. von Reinhard Bodenmann et al. (=Heinrich Bullinger Abt. 2: Briefwechsel), Zürich, Theologischer Verlag Zürich, 2013
Creators: name: Scheidegger, Christian
Publisher: name: Academic Press
Year: 2014
Subjects: subject: 270 Geschichte des Christentums, Kirchengeschichte
subject: 808 Rhetorik, Sammlungen von Literatur
subject: Zürich
subject: Bullinger, Heinrich
subject: Brief
subject: Briefsammlung
subject: Reformationsgeschichte
subject: Rezension

description: In: Schweizerische Zeitschrift für Religions- und Kulturgeschichte 108 (2014), S. 547-548
New Binary Quantum Codes Constructed from Quasi-Cyclic Codes
Creators: name: Guan, Chaofeng
name: Li, Ruihu
name: Lu, Liangdong
name: Yao, Yu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Theory (cs.IT)
subject: Quantum Physics (quant-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: It is well known that quantum codes can be constructed by means of classical symplectic dual-containing codes. This paper considers a family of two-generator quasi-cyclic codes and derives sufficient conditions for these codes to be symplectic dual-containing. Then, a new method for constructing binary quantum codes using symplectic dual-containing codes is proposed. As an application, we construct 8 binary quantum codes that exceed the best-known results. Further, another 36 new binary quantum codes are obtained by propagation rules, all of which improve the lower bound on the minimum distances.
A Hippocratic Oath for mathematicians? Mapping the landscape of ethics in mathematics
Creators: name: Müller, Dennis
name: Chiodo, Maurice
name: Franklin, James
Publisher: name: arXiv
Year: 2021
Subjects: subject: History and Overview (math.HO)
subject: FOS: Mathematics
subject: 01A80, 00A30

description: While the consequences of mathematically-based software, algorithms and strategies have become ever wider and better appreciated, ethical reflection on mathematics has remained primitive. We review the somewhat disconnected suggestions of commentators in recent decades with a view to piecing together a coherent approach to ethics in mathematics. Calls for a Hippocratic Oath for mathematicians are examined and it is concluded that while lessons can be learned from the medical profession, the relation of mathematicians to those affected by their work is significantly different. There is something to be learned also from the codes of conduct of cognate but professionalised quantitative disciplines such as engineering and accountancy, as well as from legal principles bearing on professional work. We conclude with recommendations that professional societies in mathematics should sponsor an (international) code of ethics, institutional mission statements for mathematicians and syllabuses for incorporation into mathematics degrees.
description: 20 pages. Submitted to Science and Engineering Ethics
title: Système de surveillance du VIH et des IST de deuxième génération en Suisse : Rapport de synthèse 2012-2016
Creators: name: Samitca, Sanda
name: Lociciro, Stéphanie
name: Koutaissoff, Daria
name: Dubois-Arber, Françoise
name: Simonson, Thomas
name: Bize, Raphaël
name: Amiguet, Michael
Publisher: name: Institut universitaire de médecine sociale et préventive (IUMSP)
Year: 2017
Subjects: subject: HIV

description: Les résultats présentés dans ce rapport s’appuient sur plusieurs sources de données. Nous avons conduit des enquêtes nationales auprès des hommes qui ont des rapports sexuels avec des hommes (HSH, études Gaysurvey 2012 et 2014), auprès des migrant-e-s originaires d’Afrique subsaharienne (migrant-e-s ASS, étude ANSWER 2014), auprès des travailleuses et des travailleurs du sexe (TS, étude SWAN 2016), ainsi qu’auprès des consommatrices et des consommateurs de drogue fréquentant les structures à bas seuil (UD, étude SBS 2011). A cela s’ajoute une analyse secondaire des données sur les comportements sexuels de l’enquête suisse sur la santé (ESS 2012). Nous avons également collecté des données de monitoring sur le nombre de seringues remises aux UDI dans différents settings (structures à bas seuil, programmes de prescription d’héroïne et pharmacies), ainsi que des données relatives à la mise sur le marché de préservatifs en Suisse. Nous avons conduit ou participé à la réalisation de cinq études additionnelles qui apportent un éclairage complémentaire aux résultats présentés dans ce rapport : évaluation de la campagne « Break the chains » 2015 ; analyse des données disponibles pour estimer le nombre de préservatifs écoulés sur le marché suisse ; entretiens avec des experts concernant l’évolution des comportements préventifs chez les UDI ; inventaire des dispositifs de remise de matériel d’injection stérile en milieu carcéral ; rapid assessment de la situation des personnes transgenres par rapport au risque d’infection par le VIH et les autres IST. Nous nous sommes enfin appuyés sur des résultats publiés sous l’égide de la Swiss HIV cohort study et de l’étude Health behaviour in school-aged children.
Multi-treatment Effect Estimation from Biomedical Data
Creators: name: Aoki, Raquel
name: Chen, Yizhou
name: Ester, Martin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: This work proposes the M3E2, a multi-task learning neural network model to estimate the effect of multiple treatments. In contrast to existing methods, M3E2 can handle multiple treatment effects applied simultaneously to the same unit, continuous and binary treatments, and many covariates. We compared M3E2 with three baselines in three synthetic benchmark datasets: two with multiple treatments and one with one treatment. Our analysis showed that our method has superior performance, making more assertive estimations of the multiple treatment effects.
description: 4 figures, 10 pages
Delta State Replicated Data Types
Creators: name: Almeida, Paulo Sérgio
name: Shoker, Ali
name: Baquero, Carlos
Publisher: name: arXiv
Year: 2016
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: CRDTs are distributed data types that make eventual consistency of a distributed object possible and non ad-hoc. Specifically, state-based CRDTs ensure convergence through disseminating the entire state, that may be large, and merging it to other replicas; whereas operation-based CRDTs disseminate operations (i.e., small states) assuming an exactly-once reliable dissemination layer. We introduce Delta State Conflict-Free Replicated Data Types ($δ$-CRDTs) that can achieve the best of both worlds: small messages with an incremental nature, as in operation-based CRDTs, disseminated over unreliable communication channels, as in traditional state-based CRDTs. This is achieved by defining delta mutators to return a delta-state, typically with a much smaller size than the full state, that to be joined with both local and remote states. We introduce the $δ$-CRDT framework, and we explain it through establishing a correspondence to current state-based CRDTs. In addition, we present an anti-entropy algorithm for eventual convergence, and another one that ensures causal consistency. Finally, we introduce several $δ$-CRDT specifications of both well-known replicated datatypes and novel datatypes, including a generic map composition.
description: arXiv admin note: substantial text overlap with arXiv:1410.2803
Dynamical Tropicalisation
Creators: name: Babaee, Farhad
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: Complex Variables (math.CV)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 14T10, 37F80, 32U40

description: We analyse the dynamics of the pullback of the map $z \longmapsto z^m$ on the complex tori and toric varieties. We will observe that tropical objects naturally appear in the limit, and review several theorems in tropical geometry.
description: 33 pages, 1 figure. Minor revisions. To appear in the Journal of Geometric Analysis. Nessim Sibony: In Memoriam
Antiferromagnetic domain wall motion driven by spin-orbit torques
Creators: name: Shiino, Takayuki
name: Oh, Se-Hyeok
name: Haney, Paul M.
name: Lee, Seo-Won
name: Go, Gyungchoon
name: Park, Byong-Guk
name: Lee, Kyung-Jin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We theoretically investigate dynamics of antiferromagnetic domain walls driven by spin-orbit torques in antiferromagnet/heavy metal bilayers. We show that spin-orbit torques drive antiferromagnetic domain walls much faster than ferromagnetic domain walls. As the domain wall velocity approaches the maximum spin-wave group velocity, the domain wall undergoes Lorentz contraction and emits spin-waves in the terahertz frequency range. The interplay between spin orbit torques and the relativistic dynamics of antiferromagnetic domain walls leads to the efficient manipulation of antiferromagnetic spin textures and paves the way for the generation of high frequency signals in antiferromagnets.
description: 5 pages, 3 figures
MAX_824143 D10.1 First Report on CoE governing bodies, KPI, and infrastructure setting up
Creators: name: Neri, Luisa
name: Bartolacelli, Maria
name: Cavazzoni, Carlo
name: Ferretti, Andrea
name: Maschio, Maria Celeste
name: Molinari, Elisa
name: Varsano, Daniele
Publisher: name: Zenodo
Year: 2019
Subjects: materials modelling software
HCP
exascale

description: The deliverable D10.1 summarises the setting up of governing bodies, the definition of KPIs and the building up of infrastructures of MAX. The Centre of Excellence is taking advantage of the experience acquired during the first phase of MAX with the consolidation and strengthening of the same management structure while implementing ad hoc corrections to take into account the involvement of a larger partnership.
Fluctuated spin-orbital texture of Rashba-split surface states in real and reciprocal space
Creators: name: Nakamura, Takuto
name: Ohtsubo, Yoshiyuki
name: Harasawa, Ayumi
name: Yaji, Koichiro
name: Shin, Shik
name: Komori, Fumio
name: Kimura, Shin-ichi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Spin-orbit interaction (SOI) in low-dimensional systems, namely Rashba systems and the edge states of topological materials, is extensively studied in this decade as a promising source to realize various fascinating spintronic phenomena, such as the source of the spin current and spin-mediated energy conversion. Here, we show the odd fluctuation in the spin-orbital texture in a surface Rashba system on Bi/InAs(110)-(2$\times$1) by spin- and angle-resolved photoelectron spectroscopy and a numerical simulation based on a density-functional theory (DFT) calculation. The surface state shows a paired parabolic dispersion with the spin degeneracy lifted by the Rashba effect. Although its spin polarization should be fixed in a particular direction based on the Rashba model, the observed spin polarization varies greatly and even reverses its sign depending on the wavenumber. DFT calculations also reveal that the spin directions of two inequivalent Bi chains on the surface change from nearly parallel (canted-parallel) to anti-parallel in real space in the corresponding wavevector region. These results point out an oversimplification of the nature of spin in Rashba and Dirac systems and provide more freedom than expected for spin manipulation of photoelectrons.
description: 23 pages, 7 figures
New binary black hole mergers in the LIGO--Virgo O3a data
Creators: name: Olsen, Seth
name: Venumadhav, Tejaswi
name: Mushkin, Jonathan
name: Roulet, Javier
name: Zackay, Barak
name: Zaldarriaga, Matias
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We report the detection of ten new binary black hole (BBH) mergers in the publicly released data from the the first half of the third observing run (O3a) of advanced LIGO and advanced Virgo. We identify candidates using an updated version of the IAS search pipeline and compile a catalog of signals that pass a significance threshold of astrophysical probability greater than 0.5 (following the GWTC-2.1 and 3-OGC catalogs). The updated IAS pipeline is sensitive to a larger region of parameter space, applies a template prior that accounts for different search volume as a function of intrinsic parameters, and uses an improved coherent detection statistic that optimally combines the data from the Hanford and Livingston detectors. Among the ten new events, we observe interesting astrophysical scenarios including sources with confidently large effective spin parameters in both the positive and negative directions, high-mass black holes that are difficult to form in stellar collapse models due to (pulsational) pair instability, and low-mass mergers that bridge the gap between neutron stars and the lightest observed black holes. We infer source parameters in the upper and lower black hole mass gaps with both extreme and near-unity mass ratios, and one of the possible neutron star--black hole mergers is well localized for electromagnetic counterpart searches. We detect all of the GWTC-2.1 BBH mergers with coincident data in Hanford and Livingston except for three loud events that get vetoed, which is compatible with the false-positive rate of our veto procedure, and three that fall below the detection threshold. We also return to significance the event GW190909_114149, which was reduced to a sub-threshold trigger after its initial appearance in GWTC-2. This amounts to a total of 42 BBH mergers detected by our pipeline's search of the coincident Hanford--Livingston O3a data.
description: 14 pages, 6 figures, 2 tables, 4 appendices (15 pages, 15 figures), latest version has minor updates to match the version published in Physical Review D
Intelligenzprofile hochbegabter Schüler:innen auf Basis der WISC-V
Creators: name: Daseking, Monika
name: Krüger, Nina
name: Tischmann, Melanie
Publisher: name: OSF Registries
Year: 2023
Subjects: subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology
subject: Hochbegabte
subject: Hochbegabung
subject: Intelligenzprofile
subject: WISC-V

description: In dieser Studie geht es um das Intelligenzprofil hochbegabter Schüler:innen im Vergleich zu durchschnittlich begabten Schüler:innen auf Basis der fünf primären Indizes der Wechsler Intelligence Scale for Children-Fifth Edition (WISC-V). Zunächst wird die Passung der Intelligenzstruktur der WISC-V für Hochbegabte untersucht, da einige aktuellere Studien die Faktorstruktur der WISC-V in Frage stellen und es Hinweise darauf gibt, dass Hochbegabte eine andere Intelligenzstruktur als Nicht-Hochbegabte aufweisen könnten (Dombrowski et al., 2018; Pauls & Daseking, 2021; Reynolds & Keith, 2007; Rowe et al., 2014; Vock, 2005). Unabhängig davon, wie das Ergebnis hinsichtlich der Intelligenzstruktur ausfallen wird, ist und bleibt die WISC-V vorerst das am häufigsten angewendete Testverfahren zur Identifikation von Hochbegabung bei Kindern und Jugendlichen (Preckel & Vock, 2021; Silverman, 2009). Daher ist es weiterhin von hoher Relevanz zu verstehen, welche Besonderheiten Hochbegabte im Intelligenzprofil im Vergleich zu durchschnittlich Begabten in der WISC-V zeigen. Dabei geht es neben besonderen Stärken v. a. um das Herausarbeiten des heterogenen Intelligenzprofils Hochbegabter anhand intraindividueller Stärken und Schwächen auf Basis der primären Indizes. Abschließend werden unterschiedliche Profiltypen Hochbegabter abgeleitet, um typische Muster inter- und intraindividueller Stärken und Schwächen Hochbegabter zu identifizieren. Aus den Ergebnissen können Implikationen für die Auswertung und Interpretation von Intelligenzprofilen sowie Anhaltspunkte für die Diagnostik von Hochbegabung und die weitere Forschung abgeleitet werden.
Reversible adsorption of VOCs and SVOCs from gas streams in the context of the LOHC process
Creators: name: Zilm, Adrian
name: Bösmann, Andreas
name: Wasserscheid, Peter
Publisher: name: Zenodo
Year: 2023
Subjects: LOHC
Hydrogen
Hydrogen purification
Adsorption
Desorption

description: Poster presented at Kopernikus P2X-Tag 24.06.2022 https://www.kopernikus-projekte.de/projekte/p2x Verbundvorhaben P2X: Erforschung, Validierung und Implementierung von „Power-to-X“ Konzepten, Teilvorhaben L-02 FKZ: 03SFK2L0-2
description: BMBF Verbundvorhaben P2X: Erforschung, Validierung und Implementierung von "Power-to-X" Konzepten, Teilvorhaben L-02 FKZ: 03SFK2L0-2
SU(3) quantum critical model emerging from a spin-1 topological phase
Creators: name: Rao, Wen-Jia
name: Zhu, Guo-Yi
name: Zhang, Guang-Ming
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Different from the spin-1 Haldane gapped phase, we propose a novel SO(3) spin-1 matrix product state (MPS), whose parent Hamiltonian includes three-site spin interactions. From the entanglement spectrum of a single block with $l$ sites, an enlarged SU(3) symmetry is identified in the edge states, which are conjugate to each other for the $l=even$ block but identical for the $l=odd$ block. By blocking this novel state, the blocked MPS explicitly displays the SU(3) symmetry with two distinct structures. Under a symmetric bulk bipartition with a sufficient large block length $% l=even$, the entanglement Hamiltonian (EH) of the reduced system characterizes a spontaneous dimerized phase with two-fold degeneracy. However, for the block length $l=odd$, the corresponding EH represents an SU(3) quantum critical point with delocalized edge quasiparticles, and the critical field theory is described by the SU(3) level-1 Wess-Zumino-Witten conformal field theory.
description: 5 pages, 4 figures
Defect-polymorphism controlled electrophoretic propulsion of anisometric microparticles in a nematic liquid crystal
Creators: name: S, Devika V
name: Sahu, Dinesh Kumar
name: Pujala, Ravi Kumar
name: Dhara, Surajit
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Nontrivial shape of colloidal particles create complex elastic distortions and topological defects in liquid crystals and play a key role in governing their electrophoretic propulsion through the medium. Here, we report experimental results on defects and electrophoretic transport of anisometric (snowman-shaped) dielectric particles subjected to an alternating electric field perpendicular to the director in a nematic liquid crystal. We demonstrate that the shape asymmetry gives rise to defect-polymorphism by nucleating point or ring defects at multiple locations on the particle and controls the direction as well as the magnitude of the electrophoretic propulsion. Our findings unveil a novel degree of freedom in translocating microparticles in liquid crystals for applications in microfluidics, controlled transport and assembly.
description: 12 pages, 4 figures
Estimation of physical conditions in the cold phase of the ISM in the sub-DLA system at z = 2.06 in the spectrum of the quasar J2123-0050
Creators: name: Klimenko, V. V.
name: Balashev, S. A.
name: Ivanchik, A. V.
name: Varshalovich, D. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: An independent analysis of the molecular hydrogen absorption system at z = 2.059 in the spectrum of the quasar J2123-0050 is presented. The H_2 system consists of two components (A and B) with column densities log N^A(H_2) = 17.94+/-0.01 and log N^B(H_2) = 15.16+/-0.02. The spectrum exhibits the lines of HD molecules (log N^A(HD) = 13.87+/-0.06) and the neutral species C I and Cl I associated with the H_2 absorption system. For the molecular hydrogen lines near the quasar's Ly_beta and O VI emission lines, we detect a nonzero residual flux, ~3% of the total flux, caused by the effect of partial coverage of the quasar's broad-line region by an H_2 cloud. The uniqueness of the system being investigated is manifested in a high abundance of the neutral species H_2 and C I at the lowest H I column density, log N(H I) = 19.18+/-0.15, among the high redshift systems. The N(HD)/2N(H_2) ratio for component A has turned out to be also unusually high, (4.26+/-0.60)x10^{-5}. We have investigated the physical conditions in components A and B. Component A represents the optically thick case; the gas has a low number density (n~30 cm^{-3}) and a temperature T~140 K. In component B, the medium is optically thin with n<100 cm^{-3} and T<100 K. The ultraviolet (UV) background intensity in the clouds exceeds the mean intensity in our Galaxy by almost an order of magnitude. A high gas ionization fraction, n(H+)/n(H)~10^{-2}, which can be the result of partial shielding of the system from hard UV radiation, is needed to describe the high HD and C I column densities. Using our simulations with the PDR Meudon code, we can reconstruct the observed column densities of the species within the model with a constant density n(H)=40 cm^{-3}. A high H_2 formation rate (higher than the mean Galactic value by a factor of 10-40) and high gas ionization fraction and UV background intensity are needed in this case.
description: 23 pages, 15 figures, 6 tables
Neutrino millicharge and other electromagnetic interactions with COHERENT-2021 data
Creators: name: Khan, Amir N.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We analyze new data from the COHERENT experiment of the coherent neutrino-nucleus scattering to investigate the electromagnetic interactions of neutrinos. With almost double the statistics and precision now, the statistical significance of the observed process has now enhanced to 11.6$σ$. We derive constraints on the electromagnetic properties of neutrinos using the new COHERENT data. The constraints improve by more than a factor of two compared to the previous bounds. Furthermore, we discuss the unique behavior of the neutrino millicharge at lower energy recoils and show its unique dependence on its interference with the standard model contribution, inverse power of recoil energy and the mass of the target particle in comparison to the other interactions.
description: 15 pages; 5 figures; Background was missing in the first version which has been corrected now; 1 table; Published in Nuclear Physics B
AGN Coronal Emission models I. The Predicted Radio Emission
Creators: name: Raginski, Igor
name: Laor, Ari
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Accretion discs in AGN may be associated with coronal gas, as suggested by their X-ray emission. Stellar coronal emission includes radio emission, and AGN corona may also be a significant source for radio emission in radio quiet (RQ) AGN. We calculate the coronal properties required to produce the observed radio emission in RQ AGN, either from synchrotron emission of power-law (PL) electrons, or from cyclo-synchrotron emission of hot mildly-relativistic thermal electrons. We find that a flat spectrum, as observed in about half of RQ AGN, can be produced by corona with a disc or a spherical configuration, which extends from the innermost regions out to a pc scale. A spectral break to an optically thin power-law emission is expected around 300-1000 GHz, as the innermost corona becomes optically thin. In case of thermal electrons, a sharp spectral cutoff is expected above the break. The position of the break can be measured with VLBI observations, which exclude the cold dust emission, and it can be used to probe the properties of the innermost corona. Assuming equipartition of the coronal thermal energy density, the PL electrons energy density, and the magnetic field, we find that the energy density in a disc corona should scale as $\sim R^{-1.3}$, to get a flat spectrum. In the spherical case the energy density scales as $\sim R^{-2}$, and is $\sim 4\times 10^{-4}$ of the AGN radiation energy density. In paper II we derive additional constraints on the coronal parameters from the Gudel-Benz relation, $L_{\rm Radio}/L_{\rm X-ray}\sim 10^{-5}$, which RQ AGN follow.
description: 17 pages, 10 figures. Page format slightly revised. Accepted for publication in MNRAS
title: Permitting Procedures for Renewable Energy Projects in the European Union
Creators: name: Danilova, Polina
Publisher: name: TU Wien
Year: 2024
Subjects: subject: RED
subject: European legislation
subject: acceleration
subject: duration

description: Global energy demand is on the rise due to increasing consumption from various sources such as electricity and fuel, driven by population growth, economic development, and technological advancements. Renewable energy sources are expected to see significant growth in the future as countries aim to meet climate targets and reduce carbon emissions. Europe faces a significant energy challenge and encounters a pivotal moment in its energy transition. European Union, under directives such as RED II and the EIA, has committed to increasing its renewable energy capacity to mitigate reliance on fossil fuels and to align with the Paris Agreement and European Green Deal goals. This study examines the effectiveness and efficiency of current EU permitting procedures for renewable energy projects, which are often critiqued for their complexity and the delays they cause, hindering substantial investments in renewable energy. The Master's thesis assesses the challenges of permitting processes across Member States and explores the best practices. Through a comprehensive analysis of regulatory frameworks and administrative processes, including environmental impact assessments, the research highlights significant discrepancies in the implementation of EU directives at the national level, regional, and municipal levels.By exploring case studies from Denmark, Hungary, and Austria, this research identifies best practices and pinpoints the major hurdles that developers face, such as procedural complexity, lack of transparency, and extended timelines. The findings suggest that whilesome Member States have made progress in aligning with EU directives, others lag behind, resulting in a patchwork of regulatory environments. This Master's thesis proposes targeted recommendations to streamline permitting processes, enhance inter-state cooperation, and leverage digital tools to improve transparency and reduce administrative burdens. These suggestions aim to accelerate the deployment of renewable energy projects, thereby supporting the EU's ambitious target of achieving carbon neutrality by 2050 and strengthening its leadership role in the global energy transition. The outcomes of this study are intended to inform policy adjustments and encourage a more unified approach to renewable energy development across the EU.
Kim Gladu, Huguette Krief, Marc André Bernier (dir.), La vertu féminine, de la cour de Sceaux à la guillotine, Paris (Classiques Garnier) 2022
Creators: name: Von Kulessa, Rotraud
Publisher: name: Francia-Recensio
Year: 2023

description: Kim Gladu, Huguette Krief, Marc André Bernier (dir.), La vertu féminine, de la cour de Sceaux à la guillotine, Paris (Classiques Garnier) 2022, 273 p. (Masculin/féminin dans l’Europe moderne, 34), ISBN 978-2-406-12582-2, EUR 28,00.
description: Francia-Recensio, 2023/2