cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Fuglede's conjecture on cyclic groups of order $p^n q$
Creators: name: Malikiosis, Romanos-Diogenes
name: Kolountzakis, Mihail N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 43A46, 11L03, 20K01, 13F20

description: We show that the spectral set conjecture by Fuglede holds in the setting of cyclic groups of order $p^n q$, where $p$, $q$ are distinct primes and $n\geq1$. This means that a subset $E$ of such a group $G$ tiles the group by translation ($G$ can be partitioned into translates of $E$) if and only if there exists an orthogonal basis of $L^2(E)$ consisting of group characters. The main ingredient of the present proof is the structure of vanishing sums of roots of unity of order $N$, where $N$ has at most two prime divisors; the extension of this proof to the case of cyclic groups of order $p^n q^m$ seems therefore feasible. The only previously known infinite family of cyclic groups, for which Fuglede's conjecture is verified in both directions, is that of cyclic $p$-groups, i.e. $\mathbb{Z}_{p^n}$.
description: 16 pages
Synergy from reproductive division of labor and genetic complexity drive the evolution of sex
Creators: name: Jaffe, Klaus
Publisher: name: arXiv
Year: 2017
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Computer experiments that mirror the evolutionary dynamics of sexual and asexual organisms as they occur in nature, tested features proposed to explain the evolution of sexual recombination. Results show that this evolution is better described as a network of interactions between possible sexual forms, including diploidy, thelytoky, facultative sex, assortation, bisexuality, and division of labor between the sexes, rather than a simple transition from parthenogenesis to sexual recombination. Diploidy was shown to be fundamental for the evolution of sex; bisexual reproduction emerged only among anisogamic diploids with a synergistic division of reproductive labor; and facultative sex was more likely to evolve among haploids practicing assortative mating. Looking at the evolution of sex as a complex system through individual based simulations, explains better the diversity of sexual strategies known to exist in nature, compared to classical analytical models
description: Published in the Journal of Biological Physics
Field-effect transistors made from solution-grown two-dimensional tellurene
Creators: name: Wang, Yixiu
name: Qiu, Gang
name: Wang, Ruoxing
name: Huang, Shouyuan
name: Wang, Qingxiao
name: Liu, Yuanyue
name: Du, Yuchen
name: Goddard, William A.
name: Kim, Moon J.
name: Xu, Xianfan
name: Ye, Peide D.
name: Wu, Wenzhuo
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The reliable production of two-dimensional crystals is essential for the development of new technologies based on 2D materials. However, current synthesis methods suffer from a variety of drawbacks, including limitations in crystal size and stability. Here, we report the fabrication of large-area, high-quality 2D tellurium (tellurene) using a substrate-free solution process. Our approach can create crystals with a process-tunable thickness, from monolayer to tens of nanometres, and with lateral sizes of up to 100 um. The chiral-chain van der Waals structure of tellurene gives rise to strong in-plane anisotropic properties and large thickness dependent shifts in Raman vibrational modes, which is not observed in other 2D layered materials. We also fabricate tellurene field-effect transistors, which exhibit air-stable performance at room temperature for over two months, on off ratios on the order of 106 and field-effect mobilities of around 700 cm2 per Vs. Furthermore, by scaling down the channel length and integrating with high-k dielectrics, transistors with a significant on-state current density of 1 A mm-1 are demonstrated.
Cross-over from an incommensurate singlet spiral state with a vanishingly small spin-gap to a valence bond solid state in dimerized frustrated ferromagnetic spin-chains
Creators: name: Agrapidis, Cliò Efthimia
name: Drechsler, Stefan-Ludwig
name: Brink, Jeroen van den
name: Nishimoto, Satoshi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Motivated by the magnetic properties of the spin-chain compounds LiCuSbO$_4$$\equiv$LiSbCuO$_4$ and Rb$_2$Cu$_2$Mo$_3$O$_{12}$, we study the ground state of the Heisenberg chain with dimerized nearest-neighbor ferromagnetic (FM)($J_1, J_1^\prime<0$) and next-nearest-neighbor antiferromagnetic ($J_2>0$) couplings. Using the density-matrix renormalization group technique and spin-wave theory we find a first-order transition between a fully-polarized FM and an incommensurate spiral state at $2α=β/(1+β)$, where $α$ is the frustration ratio $J_2/|J_1|$ and $β$ the degree of dimerization $J_1^\prime/J_1$.In the singlet spiral state the spin-gap is vanishingly small in the vicinity of the FM transition, corresponding to a situation of LiCuSbO$_4$. For larger $α$, corresponding to Rb$_2$Cu$_2$Mo$_3$O$_{12}$, and smaller $β$ there is a crossover from this frustration induced incommensurate state to an Affleck-Lieb-Kennedy-Tasaki-type valence bond solid state with substantial spin-gaps.
description: 4 pages, 5 figures
Zero Range Process and Multi-Dimensional Random Walks
Creators: name: Bogoliubov, Nicolay M.
name: Malyshev, Cyril
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 05A19, 05E05, 82B23

description: The special limit of the totally asymmetric zero range process of the low-dimensional non-equilibrium statistical mechanics described by the non-Hermitian Hamiltonian is considered. The calculation of the conditional probabilities of the model are based on the algebraic Bethe ansatz approach. We demonstrate that the conditional probabilities may be considered as the generating functions of the random multi-dimensional lattice walks bounded by a hyperplane. This type of walks we call the walks over the multi-dimensional simplicial lattices. The answers for the conditional probability and for the number of random walks in the multi-dimensional simplicial lattice are expressed through the symmetric functions.
title: Rassismuskritische Filmgespräche über Kurzfilme im Literaturunterricht
Creators: name: Rauth, Romina
Year: 2023

description: Die vorliegende Masterarbeit widmet sich der Forschungsfrage, welches Potenzial Filmgespräche im Kontext eines rassismuskritischen Literaturunterrichts mit Kurzfilmen haben. Dazu wurden zunächst exemplarisch drei Kurzfilme ausgewählt, die aus einer rassismuskritischen Perspektive auf den Ebenen des Inhalts und der Repräsentation, der Figuren sowie der Ästhetik und Gestaltung untersucht wurden. In für diese Arbeit erstellten Unterrichtsvorschlägen wurde schließlich überprüft, ob durch Filmgespräche Bewusstsein für rassistische Strukturen, Denkmuster und Handlungsweisen sowie die eigene Eingebundenheit in diese kreiert werden kann und ob (selbst-)reflexive Prozesse im Bezug auf Rassismus und Machtverhältnisse initiiert werden können. Es wurde eine Eignung des Einsatzes von Filmgesprächen im Kontext eines rassismuskritischen Literaturunterrichts festgestellt, wenn auch mit gewissen Einschränkungen. Eine Unsicherheit stellt etwa der Verlauf von Filmgesprächen dar, da diese möglichst lenkungsfrei stattfinden sollten. Rassismuskritische Filmgespräche hingegen verfolgen eindeutige, rassismuskritische Ziele. Somit kann durch die rassismuskritische Perspektive die freie thematische Entfaltung im Sinne eines unendlichen Verstehensprozesses nur eingeschränkt umgesetzt werden. Für zukünftige Beiträge ergibt sich daraus das Forschungsinteresse, das Potenzial von rassismuskritischen Filmgesprächen im Zusammenspiel mit weiteren Unterrichtsverfahren, wie etwa produktiven oder szenischen Verfahren, zu ergründen.
Complex powers for cone differential operators and the heat equation on manifolds with conical singularities
Creators: name: Roidos, Nikolaos
Publisher: name: arXiv
Year: 2017
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35K05, 35K65, 35R01, 46B70, 58J35

description: We obtain left and right continuous embeddings for the domains of the complex powers of sectorial $\mathbb{B}$-elliptic cone differential operators. We apply this result to the heat equation on manifolds with conical singularities and provide asymptotic expansions of the unique solution close to the conical points. We further show that the decomposition of the solution in terms of asymptotics spaces, i.e. finite dimensional spaces that describe the domains of the integer powers of the Laplacian and determined by the local geometry around the singularity, is preserved under the evolution.
description: 10 pages
B physics Beyond the Standard Model at One Loop: Complete Renormalization Group Evolution below the Electroweak Scale
Creators: name: Aebischer, Jason
name: Fael, Matteo
name: Greub, Christoph
name: Virto, Javier
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: General analyses of $B$-physics processes beyond the Standard Model require accounting for operator mixing in the renormalization-group evolution from the matching scale down to the typical scale of $B$ physics. For this purpose the anomalous dimensions of the full set of local dimension-six operators beyond the Standard Model are needed. We present here for the first time a complete and non-redundant set of dimension-six operators relevant for $B$-meson mixing and decay, together with the complete one-loop anomalous dimensions in QCD and QED. These results are an important step towards the automation of general New Physics analyses.
description: 37 pages, 3 figures + ancillary mathematica package. Version published in JHEP, with a corrected list of lepton-number-violating operators
Emergent scale symmetry: Connecting inflation and dark energy
Creators: name: Rubio, Javier
name: Wetterich, Christof
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Quantum gravity computations suggest the existence of an ultraviolet and an infrared fixed point where quantum scale invariance emerges as an exact symmetry. We discuss a particular variable gravity model for the crossover between these fixed points which can naturally account for inflation and dark energy, using a single scalar field. In the Einstein-frame formulation the potential can be expressed in terms of Lambert functions, interpolating between a power-law inflationary potential and a mixed-quintessence potential. For two natural heating scenarios, the transition between inflation and radiation domination proceeds through a "graceful reheating" stage. The radiation temperature significantly exceeds the temperature of big bang nucleosynthesis. For this type of model, the observable consequences of the heating process can be summarized in a single parameter, the heating efficiency. Our quantitative analysis of compatibility with cosmological observations reveals the existence of realistic models able to describe the whole history of the Universe using only a single metric and scalar field and involving just a small number of order one parameters.
description: 22 pages, 13 figures, matches the version published in PRD, added clarifications and references, corrected typos
Higher curvature self-interaction corrections to Hawking Radiation
Creators: name: Fairoos, C.
name: Sarkar, Sudipta
name: Yogendran, K. P.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The purely thermal nature of Hawking radiation from evaporating black holes leads to the information loss paradox. A possible route to its resolution could be if (enough) correlations are shown to be present in the radiation emitted from evaporating black holes. A re-analysis of Hawking's derivation including the effects of self-interactions in GR shows that the emitted radiation does deviate from pure thermality, however, no correlations exist between successively emitted Hawking quanta. We extend the calculations to Einstein-Gauss-Bonnet gravity and investigate if higher curvature corrections to the action lead to some new correlations in the Hawking spectra. The effective trajectory of a massless shell is determined by solving the constraint equations and the semi-classical tunneling probability is calculated. As in the case of general relativity, the radiation is no longer thermal and there is no correlation between successive emissions. The absence of any extra correlations in the emitted radiations even in Gauss-Bonnet gravity suggests that the resolution of the paradox is beyond the scope of semi-classical gravity.
description: 12 pages, no figures; Typo in author's name corrected
Barjols, Arlésiennes et gardians quittent la place de la Rouguière pour déambuler dans les rues
Creators: name: Musée National Des Arts Et Traditions Populaires (Paris)
name: Centre D'ethnologie Française
Publisher: name: École des Hautes Études en Sciences Sociales; Institut  interdisciplinaire d'anthropologie du contemporain (Paris); Laboratoire d'anthropologie et d'histoire de l'institution de la culture (Paris)
Year: 2024

Abstract
Structural dynamics during laser induced ultrafast demagnetization
Creators: name: Jal, Emmanuelle
name: López-Flores, Victor
name: Pontius, Niko
name: Ferté, Tom
name: Bergeard, Nicolas
name: Boeglin, Christine
name: Vodungbo, Boris
name: Lüning, Jan
name: Jaouen, Nicolas
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The mechanism underlying femtosecond laser pulse induced ultrafast magnetization dynamics remains elusive despite two decades of intense research on this phenomenon. Most experiments focused so far on characterizing magnetization and charge carrier dynamics, while first direct measurements of structural dynamics during ultrafast demagnetization were reported only very recently. We here present our investigation of the infrared laser pulse induced ultrafast demagnetization process in a thin Ni film, which characterizes simultaneously magnetization and structural dynamics. This is achieved by employing femtosecond time resolved X-ray resonant magnetic reflectivity (tr-XRMR) as probe technique. The experimental results reveal unambiguously that the sub-picosecond magnetization quenching is accompanied by strong changes in non-magnetic X-ray reflectivity. These changes vary with reflection angle and changes up to 30$\%$ have been observed. Modeling the X-ray reflectivity of the investigated thin film, we can reproduce these changes by a variation of the apparent Ni layer thickness of up to 1$\%$. Extending these simulations to larger incidence angles we show that tr-XRMR can be employed to discriminate experimentally between currently discussed models describing the ultrafast demagnetization phenomenon.
A robust and efficient implementation of LOBPCG
Creators: name: Duersch, Jed A.
name: Shao, Meiyue
name: Yang, Chao
name: Gu, Ming
Publisher: name: arXiv
Year: 2017
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: Locally Optimal Block Preconditioned Conjugate Gradient (LOBPCG) is widely used to compute eigenvalues of large sparse symmetric matrices. The algorithm can suffer from numerical instability if it is not implemented with care. This is especially problematic when the number of eigenpairs to be computed is relatively large. In this paper we propose an improved basis selection strategy based on earlier work by Hetmaniuk and Lehoucq as well as a robust convergence criterion which is backward stable to enhance the robustness. We also suggest several algorithmic optimizations that improve performance of practical LOBPCG implementations. Numerical examples confirm that our approach consistently and significantly outperforms previous competing approaches in both stability and speed.
Probing dark energy using convergence power spectrum and bi-spectrum
Creators: name: Dinda, Bikash R.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Weak lensing convergence statistics is a powerful tool to probe dark energy. Dark energy plays an important role to the structure formation and the effects can be detected through the convergence power spectrum, bi-spectrum etc. One of the most promising and simplest dark energy model is the $ Λ$CDM. However, it is worth investigating different dark energy models with evolving equation of state of the dark energy. In this work, detectability of different dark energy models from $ Λ$CDM model has been explored through convergence power spectrum and bi-spectrum.
description: Accepted for publication in JCAP. Matter power spectrum normalization has been changed
The distribution of stars around the Milky Way's black hole III: Comparison with simulations
Creators: name: Baumgardt, Holger
name: Amaro-Seoane, Pau
name: Schödel, Rainer
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The distribution of stars around a massive black hole (MBH) has been addressed in stellar dynamics for the last four decades by a number of authors. Because of its proximity, the centre of the Milky Way is the only observational test case where the stellar distribution can be accurately tested. Past observational work indicated that the brightest giants in the Galactic Centre (GC) may show a density deficit around the central black hole, not a cusp-like distribution, while we theoretically expect the presence of a stellar cusp. We here present a solution to this long-standing problem. We performed direct-summation $N-$body simulations of star clusters around massive black holes and compared the results of our simulations with new observational data of the GC's nuclear cluster. We find that after a Hubble time, the distribution of bright stars as well as the diffuse light follow power-law distributions in projection with slopes of $Γ\approx 0.3$ in our simulations. This is in excellent agreement with what is seen in star counts and in the distribution of the diffuse stellar light extracted from adaptive-optics (AO) assisted near-infrared observations of the GC. Our simulations also confirm that there exists a missing giant star population within a projected radius of a few arcsec around Sgr A*. Such a depletion of giant stars in the innermost 0.1 pc could be explained by a previously present gaseous disc and collisions, which means that a stellar cusp would also be present at the innermost radii, but in the form of degenerate compact cores.
description: Accepted for publication, few typos fixed
Study of shape coexistence in the 180-190Hg isotopes by SO(6) representation of eigenstates
Creators: name: Sabri, H.
name: Jabbarzade, O.
name: Asadi, A. Ghale
name: Mobarake, S. K. Mousavi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this paper, we have studied the shapes coexistence in the 180-190Hg isotopes. The SO(6) representation of eigenstates and a transitional Hamiltonian in the Interacting Boson Model are used to consider the evolution from prolate to oblate shapes for systems with total boson number N = 9-12. Parameter free (up to overall scale factors) predictions for energy spectra and quadrupole transition rates are found to be in good agreement with experimental counterparts. The results for the control parameter of transitional Hamiltonian offer a combination of spherical and deformed shapes in these Hg isotopes and also more deviation from SO(6) limit is observed when the quadrupole deformation is decreased. Also, there are some suggestion about the expectation values of operator which are determined in the first state of ground, beta and gamma bounds and the control parameter of model.
description: 27 pages, 8 figures, 8 tables. arXiv admin note: text overlap with arXiv:1509.02282; text overlap with arXiv:1312.4595 by other authors
Yukawa enhancement of $Z$-mediated New Physics in $ΔS = 2$ and $ΔB = 2$ Processes
Creators: name: Bobeth, Christoph
name: Buras, Andrzej J.
name: Celis, Alejandro
name: Jung, Martin
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We discuss Yukawa-enhanced contributions from $Z$-mediated new physics to down-type quark $ΔF=2$ processes in the framework of the standard model gauge-invariant effective theory (SMEFT). Besides the renormalization group (RG) mixing of the $Z$-mediating $ψ^2 H^2 D$ operators into $ΔF = 2$ operators, we include at the electroweak scale one-loop (NLO) matching corrections consistently, necessary for the removal of the matching scale dependence. We point out that the right-handed $Z$-mediated interactions generate through Yukawa RG mixing $ΔF=2$ left-right operators, which are further enhanced through QCD RG effects and chirally enhanced hadronic matrix elements. We investigate the impact of these new effects on the known correlations between $ΔF=2$ and $ΔF=1$ transitions in the SMEFT framework and point out qualitative differences to previous parameterizations of $Z$-mediated new physics that arise for the left-handed case. We illustrate how specific models fit into our model-independent framework by using four models with vector-like quarks. We carry out model-independent analyses of scenarios with purely left-handed and purely right-handed new-physics $Z$ couplings for each of the three sectors $s\to d$, $b\to s$ and $b\to d$. Specifically we discuss the correlations between $\varepsilon'/\varepsilon$, $\varepsilon_K$, $K_L\to μ^+μ^-$ $K^+\to π^+ν\barν$ and $K_L\toπ^0ν\barν$ in the Kaon sector, and $ϕ_s$, $B_s\toμ^+μ^-$ and $B\to K^{(*)} (μ^+μ^-, ν\barν)$ in the $b\to s$ sector and $B_d\toμ^+μ^-$ in the $b\to d$ sector.
description: 40 pages, 11 figures; v2: 2nd plot in figure 2 and references added, comparison with v2 of 1612.08839, conclusion unchanged; v3: improvements on text and presentation, matches published version
Coarse fundamental groups and box spaces
Creators: name: Delabie, Thiebout
name: Khukhro, Ana
Publisher: name: arXiv
Year: 2017
Subjects: subject: Group Theory (math.GR)
subject: Algebraic Topology (math.AT)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: We use a coarse version of the fundamental group first introduced by Barcelo, Kramer, Laubenbacher and Weaver to show that box spaces of finitely presented groups detect the normal subgroups used to construct the box space, up to isomorphism. As a consequence we have that two finitely presented groups admit coarsely equivalent box spaces if and only if they are commensurable via normal subgroups. We also provide an example of two filtrations $(N_i)$ and $(M_i)$ of a free group $F$ such that $M_i>N_i$ for all $i$ with $[M_i:N_i]$ uniformly bounded, but with $\Box_{(N_i)}F$ not coarsely equivalent to $\Box_{(M_i)}F$. Finally, we give some applications of the main theorem for rank gradient and the first $\ell^2$ Betti number, and show that the main theorem can be used to construct infinitely many coarse equivalence classes of box spaces with various properties.
description: corrected references, additional corollaries of main result, and minor changes
Radiatively Induced Neutrino Mass Model with Flavor Dependent Gauge Symmetry
Creators: name: Lee, SangJong
name: Nomura, Takaaki
name: Okada, Hiroshi
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study a radiative seesaw model at one-loop level with a flavor dependent gauge symmetry $U(1)_{μ-τ}$, in which we consider bosonic dark matter. We also analyze the constraints from lepton flavor violations, muon $g-2$, relic density of dark matter, and collider physics, and carry out numerical analysis to search for allowed parameter region which satisfy all the constraints and to investigate some predictions. Furthermore we find that a simple but adhoc hypothesis induces specific two zero texture with inverse mass matrix, which provides us several predictions such as a specific pattern of Dirac CP phase.
description: 18 pages, 7 figures, 2 tables; version accepted for publication in Nuclear Physics B
Barjols, rue de la République, balcon décoré avec des branchages et un drapeau pour la fête de la saint Marcel
Creators: name: Musée National Des Arts Et Traditions Populaires (Paris)
name: Centre D'ethnologie Française
Publisher: name: École des Hautes Études en Sciences Sociales; Institut  interdisciplinaire d'anthropologie du contemporain (Paris); Laboratoire d'anthropologie et d'histoire de l'institution de la culture (Paris)
Year: 2024

Abstract
Sixty-Four Curves of Degree Six
Creators: name: Kaihnsa, Nidhi
name: Kummer, Mario
name: Plaumann, Daniel
name: Namin, Mahsa Sayyary
name: Sturmfels, Bernd
Publisher: name: arXiv
Year: 2017
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: Primary 14P25, Secondary 14H50, 68W30

description: We present a computational study of smooth curves of degree six in the real projective plane. In the Rokhlin-Nikulin classification, there are 56 topological types, refined into 64 rigid isotopy classes. We developed software that determines the topological type of a given sextic and used it to compute empirical probability distributions on the various types. We list 64 explicit representatives with integer coefficients, and we perturb these to draw many samples from each class. This allows us to explore how many of the bitangents, inflection points and tensor eigenvectors are real. We also study the real tensor rank, the construction of quartic surfaces with prescribed topology, and the avoidance locus, which is the locus of all real lines that do not meet a given sextic. This is a union of up to 46 convex regions, bounded by the dual curve.
description: 28 pages, 8 figues; corrections and improved exposition
Vapor-phase loading of an ionic liquid into a zeolitic imidazolate framework
Creators: name: Obst, M.
name: Tietze, M.L.
name: Matavž, A.
name: Rodriguez-Hermida, S.
name: Marcoen, K.
name: Hauffman, T.
name: Ameloot, R.
Publisher: name: figshare
Year: 2023
Subjects: Other chemical sciences not elsewhere classified

description: Composites formed by a metal–organic framework (MOF) and an ionic liquid (IL) are potentially interesting materials for applications ranging from gas separation to electrochemical devices. Consequently, there is a need for robust and low-cost preparation procedures that are compatible with the desired applications. We herein report a solvent-free, one-step, and vapor-based ship-in-bottle synthesis of the IL@MOF composite 1-butyl-3-methylimidazolium bromide@ZIF-8 in powder and thin film forms. In this approach, volatile IL precursors evaporate and subsequently adsorb and react within the MOF cages to form the IL.
Transient dynamics of double quantum dots coupled to two reservoirs
Creators: name: Fukadai, T.
name: Sasamoto, T.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the time-dependent properties of double quantum dots coupled to two reservoirs using the nonequilibrium Green function method. For an arbitrary time-dependent bias, we derive an expression for the time-dependent electron density of a dot and several currents, including the current between the dots in the wide-band-limit approximation. For the special case of a constant bias, we calculate the electron density and the currents numerically. As a result, we find that these quantities oscillate and that the number of crests in a single period of the current from a dot changes with the bias voltage. We also obtain an analytical expression for the relaxation time, which expresses how fast the system converges to its steady state. From the expression, we find that the relaxation time becomes constant when the coupling strength between the dots is sufficiently large in comparison with the difference of coupling strength between the dots and the reservoirs.
description: 58 pages, 7 figures
A simple tensor network algorithm for two-dimensional steady states
Creators: name: Kshetrimayum, Augustine
name: Weimer, Hendrik
name: Orus, Roman
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Understanding dissipation in 2D quantum many-body systems is a remarkably difficult open challenge. Here we show how numerical simulations for this problem are possible by means of a tensor network algorithm that approximates steady-states of 2D quantum lattice dissipative systems in the thermodynamic limit. Our method is based on the intuition that strong dissipation kills quantum entanglement before it gets too large to handle. We test its validity by simulating a dissipative quantum Ising model, relevant for dissipative systems of interacting Rydberg atoms, and benchmark our simulations with a variational algorithm based on product and correlated states. Our results support the existence of a first order transition in this model, with no bistable region. We also simulate a dissipative spin-1/2 XYZ model, showing that there is no re-entrance of the ferromagnetic phase. Our method enables the computation of steady states in 2D quantum lattice systems.
description: 7 pages, 4 figures, 1 table. Supplementary information with 5 pages and 6 figures. To appear in Nature Communications
A Demazure crystal construction for Schubert polynomials
Creators: name: Assaf, Sami
name: Schilling, Anne
Publisher: name: arXiv
Year: 2017
Subjects: subject: Combinatorics (math.CO)
subject: Algebraic Geometry (math.AG)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 14N15, 05E10, 05A05, 05E05, 05E18, 20G42

description: Stanley symmetric functions are the stable limits of Schubert polynomials. In this paper, we show that, conversely, Schubert polynomials are Demazure truncations of Stanley symmetric functions. This parallels the relationship between Schur functions and Demazure characters for the general linear group. We establish this connection by imposing a Demazure crystal structure on key tableaux, recently introduced by the first author in connection with Demazure characters and Schubert polynomials, and linking this to the type A crystal structure on reduced word factorizations, recently introduced by Morse and the second author in connection with Stanley symmetric functions.
description: 18 pages, 16 figures; version 2: references added and updated
Kählerity of shrinking gradient Ricci solitons asymptotic to Kähler cones
Creators: name: Kotschwar, Brett
Publisher: name: arXiv
Year: 2017
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C44

description: We prove that a shrinking gradient Ricci soliton which is asymptotic to a Kähler cone along some end is itself Kähler on some neighborhood of infinity of that end. When the shrinker is complete, it is globally Kähler.
description: v2: 13 pages, minor changes. To appear in J. Geom. Anal
Projections for Neutral Di-Boson and Di-Higgs Interactions at FCC-he Collider
Creators: name: Kuday, S.
name: Saygin, H.
name: Hos, I.
name: Cetin, F.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: As a high energy e-p collider, FCC-he, has been recently proposed with sufficient energy options to investigate Higgs couplings. To analyse the sensitivity on the Higgs boson couplings, we focus spesifically on the CP-even and CP-odd Wilson coefficients with $hhZZ\:$and $hhγγ\:$ four-point interactions of Higgs boson with Effective Lagrangian Model through the process $e^{-}p\to hhje^{-}$ . We simulate the related processes in FCC-he, with 60 GeV and 120 GeV $e^{-}$ beams and 50 TeV proton beam collisions. We present the exclusion limits on these couplings both for 68% and 95% C.L. in terms of integrated luminosities.
description: 18 pages, 20 figures, 3 tables
The health–economy divide: A structural analysis of sectoral affectedness and Covid-19 policy preferences in Europe
Creators: name: Caramani, Daniele
name: Cicchi, Lorenzo
name: Petrova, Ana
Publisher: name: Zenodo
Year: 2023
Subjects: Covid-19
economic sectors
health-economy
cleavages
parties
voters

description: The Covid-19 health emergency and the resulting economic crisis hit European societies asymmetrically, which led to divergent preferences over the policies addressing the emergency. This paper analyses how different economic sectors were affected based on the “essentiality” and “physicality” of their activities, and how the level of affectedness--job losses, furloughs, decreased working hours and salaries--opposed the interests in favour of reopening the economy against the lockdowns dictated by health concerns. We combine a structural approach with an examination of the impact of party identification on citizens’ preferences, and posit that the parties that mobilise groups negatively affected by previous crises take positions toward the economic end of the continuum, in line with the preferences of an electorate that has been negatively affected by the pandemic. Our explanatory models integrate other structural (age, education) and political (trust, attitudes on expertise) factors in an effort to assess if the health–economy divide reordered the European cleavage structure towards material, rather than cultural and post-material, concerns.
Barjols, rue de la République, dispersion du public
Creators: name: Musée National Des Arts Et Traditions Populaires (Paris)
name: Centre D'ethnologie Française
Publisher: name: École des Hautes Études en Sciences Sociales; Institut  interdisciplinaire d'anthropologie du contemporain (Paris); Laboratoire d'anthropologie et d'histoire de l'institution de la culture (Paris)
Year: 2024

Abstract
Tilted Two Fluids Cosmological Models with Variable G and Λ In General Relativity
Creators: name: Dagwal, V. J.
name: Pawar, D. D.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Tilted two fluids cosmological models with variable G and Λ In General Relativity are presented. Here one fluid is matter field modelling material content of the universe and another fluid is radiation field modelling the cosmic microwave background (CMB). The tiltedness is also considered .To get the deterministic model, we have assumed a supplementary condition where s and n are constants. We have also discussed the behaviours of some physical parameters.
description: 13 pages
Thomas-Fermi Model in Rindler Space
Creators: name: Das, Sanchita
name: Ghosh, Sutapa
name: Chakrabarty, Somenath
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this article we have investigated the Thomas-Fermi model for the electron gas in Rindler space. We have found that if the uniform acceleration is along $+x$-direction, then there is $y-z$-symmetry in space. For the sake of mathematical simplicity, we have assumed two dimensional spatial structure ($x-y$) in Rindler space. It has been observed that in two dimensional spatial coordinates the electrons are distributed discontinuously but in a periodic manner in a number of rectangular strips like domain along $\pm y$-direction. Some of them are having void structure, with no electrons inside such rectangular strips, while some are filled with electrons. We call the later type domain as the normal zone. We have also given physical interpretation for such exotic type electron distribution in Rindler space.
description: 9 pages with one embedded .eps figure. Some version will appear in Mod. Phys. Lett. A
An Empirical Fitting Method for Type Ia Supernova Light Curves. II. Estimating the First-Light Time and Rise Time
Creators: name: Zheng, WeiKang
name: Kelly, Patrick L.
name: Filippenko, Alexei V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We investigate a new empirical fitting method for the optical light curves of Type Ia supernovae (SNe~Ia) that is able to estimate the first-light time of SNe~Ia, even when they are not discovered extremely early. With an improved ability to estimate the time of first light for SNe Ia, we compute the rise times for a sample of 56 well-observed SNe~Ia. We find rise times ranging from 10.5 to 20.5 days, with a mean of 16.0 days, and confirm that the rise time is generally correlated with the decline rate $Δm_{15}(B)$, but with large scatter. The rise time could be an additional parameter to help classify SN~Ia subtypes.
description: Accepted by ApJ
Weight-adjusted discontinuous Galerkin methods: matrix-valued weights and elastic wave propagation in heterogeneous media
Creators: name: Chan, Jesse
Publisher: name: arXiv
Year: 2017
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: Weight-adjusted inner products are easily invertible approximations to weighted $L^2$ inner products. These approximations can be paired with a discontinuous Galerkin (DG) discretization to produce a time-domain method for wave propagation which is low storage, energy stable, and high order accurate for arbitrary heterogeneous media and curvilinear meshes. In this work, we extend weight-adjusted DG (WADG) methods to the case of matrix-valued weights, with the linear elastic wave equation as an application. We present a DG formulation of the symmetric form of the linear elastic wave equation, with upwind-like dissipation incorporated through simple penalty fluxes. A semi-discrete convergence analysis is given, and numerical results confirm the stability and high order accuracy of WADG for several problems in elastic wave propagation.
Electroweak Phase Transitions in Einstein's Static Universe
Creators: name: Gogberashvili, Merab
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We suggest using Einstein's static universe metric for the metastable state after reheating, instead of the Friedman-Robertson-Walker spacetime. In this case strong static gravitational potential leads to the effective reduction of the Higgs vacuum expectation value, which is found to be compatible with the Standard Model first order electroweak phase transition conditions. Gravity could also increase the CP-violating effects for particles that cross the new phase bubble walls and thus is able to lead to the successful electroweak baryogenesis scenario.
description: The published version
Dark matter influence on black hole objects thermodynamics
Creators: name: Rogatko, Marek
name: Wojnar, Aneta
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: Physical process version of the first law of black hole thermodynamics in Einstein- Maxwell dark matter gravity was derived. The dark matter sector is mimicked by the additional U(1)-gauge field coupled to the ordinary Maxwell one. By considering any cross section of the black hole event horizon to the future of the bifurcation surface, the equilibrium state version of the first law of black hole mechanics was achieved. The considerations were generalized to the case of Einstein- Yang-Mills dark matter gravity theory. The main conclusion is that the influence of dark matter is crucial in the formation process of black objects. This fact may constitute the explanation of the recent observations of the enormous mass of the super luminous quasars formed in a relatively short time after Big Bang. We also pay attention to the compact binaries thermodynamics, when dark matter sector enters the game.
description: 25 pages, this version meets the one which will be published in JCAP
Dynamics of osmotic flows
Creators: name: Bacchin, Patrice
Publisher: name: arXiv
Year: 2017
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The paper presents a theoretical model that allows the dynamic description of osmotic flows through a semi-permeable interface. To depict the out-of-equilibrium transfer, the interface is represented by an energy barrier that colloids have to overcome to be transmitted to the other side of the membrane. This energy barrier thus represents the selectivity of the membrane. Furthermore, this energy barrier induces additional force terms in the momentum and the mass balances on the fluid and the colloids phases. Based on a two- fluid model, these forces can reproduce the physics of the osmotic flow without the use of the semi-empirical laws of non-equilibrium thermodynamics. It is shown that a decrease in local pressure near the interface initiates osmosis. When these balance equations are solved in a transient mode, the dynamic of the osmotic flow can be described. The paper illustrates these potentialities by showing the dynamic of an osmosis process occurring in the absence of transmembrane pressure and both the dynamic of the reverse osmosis with a constant flow through the membrane. A simulation reproducing the dynamic of the Abbé Nollet experiment is presented. The role played by the colloid-membrane interactions on the osmotic flow mechanism and on the counter osmotic pressure is analyzed and discussed in great details.
description: 19 pages, 11 figures
Ultra metal-poor stars: Spectroscopic determination of stellar atmospheric parameters using iron Non-LTE line abundances
Creators: name: Ezzeddine, Rana
name: Frebel, Anna
name: Plez, Bertrand
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present new ultra-metal-poor (UMP) stars parameters with [Fe/H]
description: 15 pages, 2 figures, 3 tables, accepted for publication in ApJ
title: Corporate Social Responsibility (CSR) in der Luftfahrtbranche
Creators: name: Paulus, Hanna-Sophie
Year: 2023

description: Eine steigende globale Nachfrage nach Flugreisen bei gleichzeitig wachsendem Umweltbewusstsein in der Bevölkerung vergrößert den Handlungsdruck auf Fluggesellschaften mehr nachhaltige Verantwortung (Corporate Social Responsibility) zu übernehmen. Das Engagement dieser international operierenden Unternehmen spiegelt sich in dessen Nachhaltigkeitsberichten wider. Mittels der strukturierten qualitativen Inhaltsanalyse werden die Berichte in ihre thematischen Bestandteile zerlegt. Eine inhaltliche Schwerpunktsetzung liegt bei amerikanischen und asiatischen Fluggesellschaften auf sozialen Themen, wohingegen europäische Unternehmen hauptsächlich ökologische Aspekte kommunizieren. Zukünftige Pläne betreffen überwiegend ökologische Themen, umfassen jedoch einen geringen Anteil der Berichte. Eine Beleuchtung der verwendeten Berichterstattungsstandards hebt GRI als das am häufigsten verwendete Rahmenwerk hervor. Durch einen Vergleich werden die nachhaltigen Unternehmensdaten anhand des erstellten Industriemittelwerts eingeordnet sowie Trends im CSR-Kontext offenbart. Die Ergebnisse verdeutlichen die Situation der kommunizierten nachhaltigen Verantwortung der global finanziell erfolgreichsten Fluggesellschaften.
description: Increasing global demand for air travel and growing environmental awareness among the population are intensifying the pressure on airlines to take on more sustainable responsibility (Corporate Social Responsibility). The commitment of these internationally operating companies is reflected in their sustainability reports. Using structured qualitative content analysis, the reports are broken down into their thematic components. American and Asian airlines focus on social issues, whereas European companies mainly communicate ecological aspects. Future plans predominantly concern ecological topics, but comprise a small share of the reports. An examination of the reporting standards used highlights GRI as the most applied framework. Through a comparison, sustainable company data is classified according to the industry mean and therefore trends in the CSR context are revealed. The results illustrate the communicated engagement of the financially most successful airlines worldwide regarding their sustainable responsibility.
Wie grün sind die Gebäude von Grosskonzernen?
Creators: name: Richter, Thomas
name: Soliva, Eveline
Publisher: name: Galledia
Year: 2022
Subjects: Green Building
Nachhaltigkeit
Immobilie
Klimaerwärmung
Studie
Internationaler Vergleich
Schweiz
332: Finanzwirtschaft

description: Das Thema Green Building ist ein Megatrend in der Immobilienindustrie. Gemäss einer aktuellen ZHAW-Studie steht die Schweiz im Bereich Corporate Real Estate und Green Building im internationalen Vergleich recht gut da.
Stripe order in the underdoped region of the two-dimensional Hubbard model
Creators: name: Zheng, Bo-Xiao
name: Chung, Chia-Min
name: Corboz, Philippe
name: Ehlers, Georg
name: Qin, Ming-Pu
name: Noack, Reinhard M.
name: Shi, Hao
name: White, Steven R.
name: Zhang, Shiwei
name: Chan, Garnet Kin-Lic
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Competing inhomogeneous orders are a central feature of correlated electron materials including the high-temperature superconductors. The two- dimensional Hubbard model serves as the canonical microscopic physical model for such systems. Multiple orders have been proposed in the underdoped part of the phase diagram, which corresponds to a regime of maximum numerical difficulty. By combining the latest numerical methods in exhaustive simulations, we uncover the ordering in the underdoped ground state. We find a stripe order that has a highly compressible wavelength on an energy scale of a few Kelvin, with wavelength fluctuations coupled to pairing order. The favored filled stripe order is different from that seen in real materials. Our results demonstrate the power of modern numerical methods to solve microscopic models even in challenging settings.