cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Random pure states: quantifying bipartite entanglement beyond the linear statistics
Creators: name: Vivo, Pierpaolo
name: Pato, Mauricio P.
name: Oshanin, Gleb
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze the properties of entangled random pure states of a quantum system partitioned into two smaller subsystems of dimensions $N$ and $M$. Framing the problem in terms of random matrices with a fixed-trace constraint, we establish, for arbitrary $N \leq M$, a general relation between the $n$-point densities and the cross-moments of the eigenvalues of the reduced density matrix, i.e. the so-called Schmidt eigenvalues, and the analogous functionals of the eigenvalues of the Wishart-Laguerre ensemble of the random matrix theory. This allows us to derive explicit expressions for two-level densities, and also an exact expression for the variance of von Neumann entropy at finite $N,M$. Then we focus on the moments $\mathbb{E}\{K^a\}$ of the Schmidt number $K$, the reciprocal of the purity. This is a random variable supported on $[1,N]$, which quantifies the number of degrees of freedom effectively contributing to the entanglement. We derive a wealth of analytical results for $\mathbb{E}\{K^a\}$ for $N = 2$ and $N=3$ and arbitrary $M$, and also for square $N = M$ systems by spotting for the latter a connection with the probability $P(x_{min}^{GUE} \geq \sqrt{2N}ξ)$ that the smallest eigenvalue $x_{min}^{GUE}$ of a $N\times N$ matrix belonging to the Gaussian Unitary Ensemble is larger than $\sqrt{2N}ξ$. As a byproduct, we present an exact asymptotic expansion for $P(x_{min}^{GUE} \geq \sqrt{2N}ξ)$ for finite $N$ as $ξ\to \infty$. Our results are corroborated by numerical simulations whenever possible, with excellent agreement.
description: 22 pages, 8 figures. Minor changes, typos fixed. Accepted for publication in PRE
Proposal of questionnaire about the use of digital platforms in school for its validation
Creators: name: Gonzalez-Mingot, Sandra
Publisher: name: Zenodo
Year: 2023

description: This questionnaire is part of the doctoral thesis "Educational digital tools in primary education: presence and influences of use in the Catalan school context" in the interuniversity Doctorate in Educational Technology program of the University of Lleida conducted by Sandra González Mingot and directed by Dr. Victoria Marin Juarros.
Position space method for the nucleon magnetic moment in lattice QCD
Creators: name: Alexandrou, Constantia
name: Constantinou, Martha
name: Koutsou, Giannis
name: Ottnad, Konstantin
name: Petschlies, Marcus
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The extraction of the magnetic form factor of the nucleon at zero momentum transfer is usually performed by adopting a parametrization for its momentum dependence and fitting the results obtained at finite momenta. We present a position space method that allows us to remove the momentum prefactor in the form factor decomposition and hence compute the magnetic form factor directly at zero momentum without the need to assume a functional form for its momentum dependence. The method is explored on one ensemble using $N_f=2+1+1$ Wilson twisted mass fermions with a light quark mass corresponding to $M_π\approx373\mathrm{GeV}$ and a lattice spacing of $a\approx0.082\mathrm{fm}$. We obtain results for the isovector magnetic moment and for the proton and neutron magnetic moments. The value we find for the isovector magnetic moment is larger as compared to fitting the form factor at the discrete values of the lattice momentum transfers using a dipole Ansatz, bringing it closer to the experimental value.
description: revised version, 18 pages, 7 figures
Continuous wave single photon transistor based on a superconducting circuit
Creators: name: Kyriienko, Oleksandr
name: Sørensen, Anders S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We propose a microwave frequency single photon transistor which can operate under continuous wave probing, and represents an efficient single microwave photon detector. It can be realized using an impedance matched system of a three level artificial ladder-type atom coupled to two microwave cavities connected to input/output waveguides. Using a classical drive on the upper transition, we find parameter space where a single photon control pulse incident on one of cavities can be fully absorbed into hybridized excited states. This subsequently leads to series of quantum jumps in the upper manifold and the appearance of a photon flux leaving the second cavity through a separate input/output port. The proposal does not require time variation of the probe signals, thus corresponding to a passive version of single photon transistor. The resulting device is robust to qubit dephasing processes, possesses low dark count rate for large anharmonicity, and can be readily implemented using current technology.
description: 6+18 pages, 4+8 figures
title: Orchard meadows: consumer perception and communication of a traditional agroforestry system in Germany
Creators: name: Philipp, Sophia M.
name: Zander, Katrin
Publisher: name: Universität Kassel
Year: 2023
Subjects: subject: Traditional agroforestry systems
subject: Orchard meadows
subject: Biodiversity
subject: Consumer preferences
subject: Apple juice
subject: 570
subject: 580
subject: 630
subject: Deutschland
subject: Streuobstwiese
subject: Biologische Landwirtschaft
subject: Biodiversität
subject: Apfel
subject: Verbraucherverhalten
subject: Agroforstwirtschaft

description: Gefördert im Rahmen des Projekts DEAL
Zum 500. Geburtstag des ersten evangelischen Erzbischofs von Canterbury, Thomas Cranmer
Creators: name: Leuenberger, Samuel
Publisher: name: Jahrbuch für evangelikale Theologie
Year: 2025

description: 1822544386
description: Jahrbuch für evangelikale Theologie, V. 4 (1990): Jahrbuch für evangelikale Theologie, Band 4
title: Development of a novel 3D culture system to understand bone-cartilage crosstalk in osteoarthritis
Creators: name: Hughes, David James
Publisher: name: Edinburgh Napier University
publisherIdentifier: https://ror.org/03zjvnn91
publisherIdentifierScheme: ROR
Year: 2024

description: Osteoarthritis (OA) is a chronic degenerative disease of the articulated joint that affects approximately 10% of men and 18% of women over the age of 60 globally. There is no cure for OA, and current treatments aim to attenuate the symptoms e.g., non-steroidal anti-inflammatories are used to manage pain, and in severe cases, surgical intervention may be necessary. There is currently no validated in vitro model of OA, which limits understanding of the disease and makes the development of new therapies more challenging.
Animal models of OA do exist; however, scientists are now expected to adhere to the “3Rs” principle of animal experimentation: reduce, replace, and refine. The development of a physiological in vitro model of OA would reduce the need for animal experimentation and improve the consistency of results obtained using in vitro and in vivo models.Development of a typical two-dimensional (2D) in vitro model of OA is challenging as the key cell types, in particular cartilage cells, often lose their phenotype. Additionally, in vitro models often focus on only one cell type (predominantly chondrocytes in the case of OA) which does not give any indication of crosstalk between cartilage and bone cells (osteoblasts) that becomes dysregulated in articulated joints during OA progression, a phenomenon which has been recognised in more recent OA research.
With the development of three-dimensional (3D) cell culture technologies, such as self-assembling supramolecular hydrogels, there is an opportunity to create a physiological in vitro model of OA using these new materials; 3D models have been shown to maintain cellular phenotypes and provide opportunities for the co-culture of multiple cell types and for the creation of direct cellular interfaces.
The research described here aimed to develop a 3D hydrogel co-culture model of OA by determining the most appropriate cell types and the optimal hydrogel conditions to recapitulate the articulated joint under both physiological and OA pathological conditions. Firstly, the most appropriate cell types were identified by analysis of the expression of genes and proteins associated with healthy and diseased chondrocytes and osteoblasts using RT-qPCR and immunoblotting techniques. The optimum hydrogel conditions for growing these cells were determined using RT-qPCR, immunoblotting, immunostaining, and dye-based fluorescent staining, across a variety of hydrogel culture conditions, including hydrogels of varying stiffnesses and composition.
Finally, autophagy, a cellular degradation pathway that plays a key role in OA, and is a druggable target, was manipulated in vitro using the thiopurine Azathioprine, a potential novel drug for the treatment of OA.
Developing Certifiable Liquid Hydrogen Gondola Airliner, Design Innovations Challenges
Creators: name:  DR RAJ NANGIA
name:   MR LES HYDE
name:   PROF. JONATHAN COOPER
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: SUSTAINABLE AVIATION
AERO FLIGHT PHYSICS
CFD

description: Results from the Seventh AIAA CFO Drag Prediction Workshop -Expanding the Envelope -are presented. These cases focused on force/moment and pressure predictions for the NASA Common Research Model wing-body configuration. The Common Research Model geometry was deformed to the appropriate static aeroelastic twist and deflection at each specified angle-of-attack. The grid refinement study (Case 1) used a common set of overset, multiblock structured, and unstructured grids, as well as user created unstructured and structured based grids. Solutions were requested for the wing-body at a fixed Mach number and lift coefficient near buffet onset. The wing-body static aeroelastic/buffet study (Case 2) specified an angle-of-attack sweep at finely spaced intervals through the zone where wing shock-induced separation was expected to begin. Case 3 requested a Reynolds number/dynamic pressure sweep at a constant lift coefficient. The optional Case 4 requested grid adaption solutions of the wing-body at a specified flight condition. Optional Case 5 1 Boeing Technical Fellow (Retired), AIAA Associate Fellow 2 Vice Director, DGLR Member 3 Research Scientist 4 Principal Engineer, AIAA Associate Fellow 5 Chief Design Officer, Boeing Technical Fellow (Retired), AIAA Fellow, Chairman DPW 6 Senior Engineer, AIAA Member 9 Configuration Aerodynamics Branch, AIAA Senior Member 10 _Research Engineer, Applied Aerodynamics Department. 11 Senior Researcher, AIAA Senior Member 12 Consulting Engineer, RAeS HonoraryFellow, AIAA Associate Fellow
Holomorphic Yukawa Couplings in Heterotic String Theory
Creators: name: Blesneag, Stefan
name: Buchbinder, Evgeny I.
name: Candelas, Philip
name: Lukas, Andre
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We develop techniques, based on differential geometry, to compute holomorphic Yukawa couplings for heterotic line bundle models on Calabi-Yau manifolds defined as complete intersections in projective spaces. It is shown explicitly how these techniques relate to algebraic methods for computing holomorphic Yukawa couplings. We apply our methods to various examples and evaluate the holomorphic Yukawa couplings explicitly as functions of the complex structure moduli. It is shown that the rank of the Yukawa matrix can decrease at specific loci in complex structure moduli space. In particular, we compute the up Yukawa coupling and the singlet-Higgs-lepton trilinear coupling in the heterotic standard model described in arXiv:1404.2767
description: 53 pages, Latex; typos corrected
On the quantum gravastar
Creators: name: Moti, Raihaneh
name: Shojai, Ali
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we show that it is possible to have pure quantum gravastar solution to the quantum improved Einstein equations. Such an object is essentially a gravastar in which the thin layer of matter is replaced by quantum effects. The metric of a pure quantum gravastar is obtained and its stability is discussed.
Equivariant graph neural networks for fast electron density estimation of molecules, liquids, and solids
Creators: name: Jørgensen, Peter Bjørn
name: Bhowmik, Arghya
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Electron density $ρ(\vec{r})$ is the fundamental variable in the calculation of ground state energy with density functional theory (DFT). Beyond total energy, features and changes in $ρ(\vec{r})$ distributions are often used to capture critical physicochemical phenomena in functional materials. We present a machine learning framework for the prediction of $ρ(\vec{r})$. The model is based on equivariant graph neural networks and the electron density is predicted at special query point vertices that are part of the message passing graph, but only receive messages. The model is tested across multiple data sets of molecules (QM9), liquid ethylene carbonate electrolyte (EC) and LixNiyMnzCo(1-y-z)O2 lithium ion battery cathodes (NMC). For QM9 molecules, the accuracy of the proposed model exceeds typical variability in $ρ(\vec{r})$ obtained from DFT done with different exchange-correlation functionals. The accuracy on all three datasets is beyond state of the art and the computation time is orders of magnitude faster than DFT.
description: 27 pages, 10 figures
An Open Catalog for Supernova Data
Creators: name: Guillochon, James
name: Parrent, Jerod
name: Kelley, Luke Zoltan
name: Margutti, Raffaella
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present the Open Supernova Catalog, an online collection of observations and metadata for presently 36,000+ supernovae and related candidates. The catalog is freely available on the web (https://sne.space), with its main interface having been designed to be a user-friendly, rapidly-searchable table accessible on desktop and mobile devices. In addition to the primary catalog table containing supernova metadata, an individual page is generated for each supernova which displays its available metadata, light curves, and spectra spanning X-ray to radio frequencies. The data presented in the catalog is automatically rebuilt on a daily basis and is constructed by parsing several dozen sources, including the data presented in the supernova literature and from secondary sources such as other web-based catalogs. Individual supernova data is stored in the hierarchical, human- and machine-readable JSON format, with the entirety of each supernova's data being contained within a single JSON file bearing its name. The setup we present here, which is based upon open source software maintained via git repositories hosted on github, enables anyone to download the entirety of the supernova dataset to their home computer in minutes, and to make contributions of their own data back to the catalog via git. As the supernova dataset continues to grow, especially in the upcoming era of all-sky synoptic telescopes which will increase the total number of events by orders of magnitude, we hope that the catalog we have designed will be a valuable tool for the community to analyze both historical and contemporary supernovae.
description: 26 pages, 6 figures, 1 table. Updated in response to referee comments, added Luke Zoltan Kelley to author list. Catalog available at http://sne.space
Quantum Chaos and Thermalization in Isolated Systems of Interacting Particles
Creators: name: Borgonovi, F.
name: Izrailev, F. M.
name: Santos, L. F.
name: Zelevinsky, V. G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: This review is devoted to the problem of thermalization in a small isolated conglomerate of interacting constituents. A variety of physically important systems of intensive current interest belong to this category: complex atoms, molecules (including biological molecules), nuclei, small devices of condensed matter and quantum optics on nano- and micro-scale, cold atoms in optical lattices, ion traps. Physical implementations of quantum computers, where there are many interacting qubits, also fall into this group. Statistical regularities come into play through inter-particle interactions, which have two fundamental components: mean field, that along with external conditions, forms the regular component of the dynamics, and residual interactions responsible for the complex structure of the actual stationary states. At sufficiently high level density, the stationary states become exceedingly complicated superpositions of simple quasiparticle excitations. At this stage, regularities typical of quantum chaos emerge and bring in signatures of thermalization. We describe all the stages and the results of the processes leading to thermalization, using analytical and massive numerical examples for realistic atomic, nuclear, and spin systems, as well as for models with random parameters. The structure of stationary states, strength functions of simple configurations, and concepts of entropy and temperature in application to isolated mesoscopic systems are discussed in detail. We conclude with a schematic discussion of the time evolution of such systems to equilibrium.
description: 69 pages, 31 figures
Die Auseinandersetzung zwischen bekenntnisgebundener und "moderner" Theologie
Creators: name: Hauzenberger, Hans
Publisher: name: Jahrbuch für evangelikale Theologie
Year: 2025

description: 1822542677
description: Jahrbuch für evangelikale Theologie, V. 4 (1990): Jahrbuch für evangelikale Theologie, Band 4
Cosmological perturbations in mimetic Horndeski gravity
Creators: name: Arroja, Frederico
name: Bartolo, Nicola
name: Karmakar, Purnendu
name: Matarrese, Sabino
Publisher: name: arXiv
Year: 2015
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: We study linear scalar perturbations around a flat FLRW background in mimetic Horndeski gravity. In the absence of matter, we show that the Newtonian potential satisfies a second-order differential equation with no spatial derivatives. This implies that the sound speed for scalar perturbations is exactly zero on this background. We also show that in mimetic $G^3$ theories the sound speed is equally zero. We obtain the equation of motion for the comoving curvature perturbation (first order differential equation) and solve it to find that the comoving curvature perturbation is constant on all scales in mimetic Horndeski gravity. We find solutions for the Newtonian potential evolution equation in two simple models. Finally we show that the sound speed is zero on all backgrounds and therefore the system does not have any wave-like scalar degrees of freedom.
description: v1: 17 pages. v2: minor changes, typos corrected and references added. Published version. v3: equations of Appendix D corrected. No changes in the conclusions. Supersedes published version
title: Einleitung
Creators: name: Brandt, Christina
name: Fangerau, Heiner
name: Köchy, Kristian
Publisher: name: MyCoRe Community
Year: 2023
Subjects: subject: Ernst Haeckel
subject: Wissenschaftsgeschichte
subject: Rezeption von Haeckels Wirken
subject: Vorstellung der Einzelbeiträge des Bandes
subject: Einordnung der Publikation in den aktuellen wissenschaftlichen Diskurs
subject: 000

description: Haeckels ambivalentes Vermächtnis, p. 7
Objective realism and freedom of choice in relativistic quantum field theory
Creators: name: Bednorz, Adam
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Traditional Bell's argument shows that freedom of choice is inconsistent with quantum realism if lack of signaling and sufficiently fast choices and readouts are assumed. While no-signaling alone is a consequence of special relativity, this is not the case of spacetime location of choice and readout. Here we attempt to incorporate freedom of choice into quantum objective realism relying solely on relativistic quantum field theory. We conclude that this is impossible without breaking relativistic invariance and put forward the possibility of signaling faster than light, which cannot be excluded if an ultimate theory violates relativity.
description: 11 pages, 7 figures
Non linear massive gravity as a gravitational $σ$-model
Creators: name: Arraut, Ivan
name: Chelabi, Kaddour
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show the direct analogy between the ghost-free non-linear formulation of massive gravity and the standard $σ$-models well understood in the literature. This issue explains why there are two non-trivial family of solutions for the spherically symmetric case inside the non-linear massive gravity formulations with two free-parameters $α$ and $β$. In general, the case $β
description: Journal (Published) version up to some final edition arrangements, 5 pages, references added, one section added
Rodlike Heisenberg nanomagnet driven by propagating magnetic field: Nonequilibrium phase transition
Creators: name: Acharyya, Muktish
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The dynamical responses of a rodlike anisotropic Heisenberg ferromagnet, irradiated by the propagating magnetic field wave, have been studied by Monte Carlo simulation using Metropolis single spin-flip algorithm. A nonequilibrium dynamical phase transition has been observed. The transition temperature has been obtained from the peak position of the variance of the dynamic order parameter plotted as a function of the temperature. The transition has been found to occur at a lower temperature for the higher value of the amplitude of the propagating magnetic field wave. A comprehensive phase boundary was drawn. The phase boundary has been found to be insensitive to the wavelength of the propagating field wave. The boundary encloses more area of the region of the ordered phase for stronger anisotropy.
description: 7 pages Latex, 7 captioned eps figures, Revised and extra figure added
How to model the interaction of charged Janus particles
Creators: name: Hieronimus, Reint
name: Raschke, Simon
name: Heuer, Andreas
Publisher: name: arXiv
Year: 2015
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We analyse the interaction of charged Janus particles including screening effects. The explicit interaction is mapped via a least square method on a variable number $n$ of systematically generated tensors that reflect the angular dependence of the potential. For $n = 2$ we show that the interaction is equivalent to a model previously described by Erdmann, Kröger and Hess (EKH). Interestingly, this mapping is not able to capture the subtleties of the interaction for small screening lengths. Rather, a larger number of tensors has to be used. We find that the characteristics of the Janus type interaction plays an important role for the aggregation behaviour. We obtained cluster structures up to the size of $13$ particles for $n = 2$ and $36$ and screening lengths $κ^{-1} = 0.1$ and $1.0$ via Monte Carlo simulations. The influence of the screening length is analysed and the structures are compared to results for an electrostatic-type potential and for multipole-expanded Derjaguin-Landau-Verwey-Overbeek (DLVO) theory. We find that a dipole-like potential (EKH or dipole DLVO approximation) is not able to sufficiently reproduce the anisotropy effects of the potential. Instead, a higher order expansion has to be used to obtain clusters structures that are identical to experimental results for up to $N = 8$ particles. The resulting minimum-energy clusters are compared to those of sticky hard sphere systems. Janus particles with a short-range screened interaction resemble sticky hard sphere clusters for all considered particle numbers, whereas for long-range screening even very small clusters are structurally different.
Discrete analog of the Jacobi set for vector fields
Creators: name: Adilkhanov, A. N.
name: Pavlov, A. V.
name: Taimanov, I. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: The Jacobi set is a useful descriptor of mutual behavior of functions defined on a common domain. We introduce the piecewise linear Jacobi set for general vector fields on simplicial complexes. This definition generalizes the definition of the Jacobi set for gradients of functions introduced by Edelsbrunner and Harer.
description: 12 pages
Circumcentric directions of cones
Creators: name: Behling, Roger
name: Bello-Cruz, Yunier
name: Lara-Urdaneta, Hugo
name: Oviedo, Harry
name: Santos, Luiz-Rafael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 49M27, 65K05, 65B99, 90C25

description: Generalized circumcenters have been recently introduced and employed to speed up classical projection-type methods for solving feasibility problems. In this note, circumcenters are enforced in a new setting; they are proven to provide inward directions to sets given by convex inequalities. In particular, we show that circumcentric directions of finitely generated cones belong to the interior of their polars. We also derive a measure of interiorness of the circumcentric direction, which then provides a special cone of search directions, all being feasible to the convex region under consideration.
description: 11
Camera-aware Style Separation and Contrastive Learning for Unsupervised Person Re-identification
Creators: name: Li, Xue
name: Liang, Tengfei
name: Jin, Yi
name: Wang, Tao
name: Li, Yidong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Unsupervised person re-identification (ReID) is a challenging task without data annotation to guide discriminative learning. Existing methods attempt to solve this problem by clustering extracted embeddings to generate pseudo labels. However, most methods ignore the intra-class gap caused by camera style variance, and some methods are relatively complex and indirect although they try to solve the negative impact of the camera style on feature distribution. To solve this problem, we propose a camera-aware style separation and contrastive learning method (CA-UReID), which directly separates camera styles in the feature space with the designed camera-aware attention module. It can explicitly divide the learnable feature into camera-specific and camera-agnostic parts, reducing the influence of different cameras. Moreover, to further narrow the gap across cameras, we design a camera-aware contrastive center loss to learn more discriminative embedding for each identity. Extensive experiments demonstrate the superiority of our method over the state-of-the-art methods on the unsupervised person ReID task.
description: 6 pages, 4 figures, 2 tables
Dissipation-assisted prethermalization in long-range interacting atomic ensembles
Creators: name: Schütz, Stefan
name: Jäger, Simon B.
name: Morigi, Giovanna
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We theoretically characterize the semiclassical dynamics of an ensemble of atoms after a sudden quench across a driven-dissipative second-order phase transition. The atoms are driven by a laser and interact via conservative and dissipative long-range forces mediated by the photons of a single-mode cavity. These forces can cool the motion and, above a threshold value of the laser intensity, induce spatial ordering. We show that the relaxation dynamics following the quench exhibits a long prethermalizing behaviour which is first dominated by coherent long-range forces, and then by their interplay with dissipation. Remarkably, dissipation-assisted prethermalization is orders of magnitude longer than prethermalization due to the coherent dynamics. We show that it is associated with the creation of momentum-position correlations, which remain nonzero for even longer times than mean-field predicts. This implies that cavity cooling of an atomic ensemble into the selforganized phase can require longer time scales than the typical experimental duration. In general, these results demonstrate that noise and dissipation can substantially slow down the onset of thermalization in long-range interacting many-body systems.
description: substantially revised manuscript: 5 pages, 4 figures and Supplemental Material, to appear in Phys. Rev. Lett
Moffatt vortices: Concerns and Finiteness
Creators: name: Kalita, Jiten C.
name: Biswas, Sougata
name: Panda, Swapnendu
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Till date, the sequence of vortices present in the solid corners of steady internal viscous incompressible flows, widely known as Moffatt vortices was thought to be infinite. However, the already existing and most recent geometric theories on incompressible viscous flows that express vortical structures in terms of critical points in bounded domains, indicate a strong opposition to this notion of infiniteness. In this study, we endeavor to bridge the gap between the two opposing stream of thoughts by addressing what might have gone wrong and pinpoint the shortcomings on the assumptions of the existing theorems on Moffatt vortices. We provide our own set of proofs for establishing the finiteness of the sequence of Moffatt vortices by making use of the continuum hypothesis and Kolmogorov scale, which guarantee a non-zero scale for the smallest vortex structure possible in incompressible viscous flows. We point out that the notion of infiniteness resulting from discrete self-similarity of the vortex structures is not physically feasible. The centers of these vortices have been quantified by us as fixed points through Brouwer fixed-point theorem and boundary of a vortex as circle cell. With the aid of these new developments and making use of some existing theorems in topology along with some elementary concept of mathematical analysis, we provide several approaches to delve into this issue. All these approaches converge to the same conclusion that the sequence of Moffatt vortices cannot be infinite; in fact, it is at most finite.
description: 21 pages, 4 figures. New representation with different title of the previous version of the article "The Finiteness of Moffatt vortices"
Non-symmetric Macdonald polynomials and Demazure-Lusztig operators
Creators: name: Alexandersson, Per
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 05E10, 05A30, 33D52

description: We extend the family non-symmetric Macdonald polynomials and define general-basement Macdonald polynomials. We show that these also satisfy a triangularity property with respect to the monomials bases and behave well under the Demazure-Lusztig operators. The symmetric Macdonald polynomials $J_λ$ are expressed as a sum of general-basement Macdonald polynomials via an explicit formula. By letting $q=0$, we obtain $t$-deformations of key polynomials and Demazure atoms and we show that the Hall--Littlewood polynomials expand positively into these. This generalizes a result by Haglund, Luoto, Mason and van Willigenburg. As a corollary, we prove that Schur polynomials decompose with non-negative coefficients into $t$-deformations of general Demazure atoms and thus generalizing the $t=0$ case which was previously known. This gives a unified formula for the classical expansion of Schur polynomials in Hall-Littlewood polynomials and the expansion of Schur polynomials into Demazure atoms.
description: 21 pages, 1 figure
Magnon-drag thermopower and Nernst coefficient in Fe, Co, and Ni
Creators: name: Watzman, Sarah J.
name: Duine, Rembert A.
name: Tserkovnyak, Yaroslav
name: Boona, Stephen R.
name: Jin, Hyungyu
name: Prakash, Arati
name: Zheng, Yuanhua
name: Heremans, Joseph P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Magnon-drag is shown to dominate the thermopower of elemental Fe from 2 to 80 K and of elemental Co from 150 to 600 K; it is also shown to contribute to the thermopower of elemental Ni from 50 to 500 K. Two theoretical models are presented for magnon-drag thermopower. One is a hydrodynamic theory based purely on non-relativistic, Galilean, spin-preserving electron-magnon scattering. The second is based on spin-motive forces, where the thermopower results from the electric current pumped by the dynamic magnetization associated with a magnon heat flux. In spite of their very different microscopic origins, the two give similar predictions for pure metals at low temperature, allowing us to semi-quantitatively explain the observed thermopower of elemental Fe and Co without adjustable parameters. We also find that magnon-drag may contribute to the thermopower of Ni. A spin-mixing model is presented that describes the magnon-drag contribution to the Anomalous Nernst Effect in Fe, again enabling a semi-quantitative match to the experimental data without fitting parameters. Our work suggests that particle non-conserving processes may play an important role in other types of drag phenomena, and also gives a predicative theory for improving metals as thermoelectric materials.
description: main text plus 7 figures; accepted in PRB September 2016
Theide, Carsten Peter (Hrsg.): Christlicher Glaube und Literatur
Creators: name: Bleicher, Joan
Publisher: name: Jahrbuch für evangelikale Theologie
Year: 2025

description: 1822367638
description: Jahrbuch für evangelikale Theologie, V. 3 (1989): Jahrbuch für evangelikale Theologie, Band 3
Constellation Shaping for WDM systems using 256QAM/1024QAM with Probabilistic Optimization
Creators: name: Yankov, Metodi P.
name: Da Ros, Francesco
name: da Silva, Edson P.
name: Forchhammer, Søren
name: Larsen, Knud J.
name: Oxenløwe, Leif K.
name: Galili, Michael
name: Zibar, Darko
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: Optics (physics.optics)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: In this paper, probabilistic shaping is numerically and experimentally investigated for increasing the transmission reach of wavelength division multiplexed (WDM) optical communication system employing quadrature amplitude modulation (QAM). An optimized probability mass function (PMF) of the QAM symbols is first found from a modified Blahut-Arimoto algorithm for the optical channel. A turbo coded bit interleaved coded modulation system is then applied, which relies on many-to-one labeling to achieve the desired PMF, thereby achieving shaping gain. Pilot symbols at rate at most 2% are used for synchronization and equalization, making it possible to receive input constellations as large as 1024QAM. The system is evaluated experimentally on a 10 GBaud, 5 channels WDM setup. The maximum system reach is increased w.r.t. standard 1024QAM by 20% at input data rate of 4.65 bits/symbol and up to 75% at 5.46 bits/symbol. It is shown that rate adaptation does not require changing of the modulation format. The performance of the proposed 1024QAM shaped system is validated on all 5 channels of the WDM signal for selected distances and rates. Finally, it was shown via EXIT charts and BER analysis that iterative demapping, while generally beneficial to the system, is not a requirement for achieving the shaping gain.
description: 10 pages, 12 figures, Journal of Lightwave Technology, 2016
Finite-key security analysis for multilevel quantum key distribution
Creators: name: Bradler, Kamil
name: Mirhosseini, Mohammad
name: Fickler, Robert
name: Broadbent, Anne
name: Boyd, Robert
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We present a detailed security analysis of a d-dimensional quantum key distribution protocol based on two and three mutually unbiased bases (MUBs) both in an asymptotic and finite key length scenario. The finite secret key rates are calculated as a function of the length of the sifted key by (i) generalizing the uncertainly relation-based insight from BB84 to any d-level 2-MUB QKD protocol and (ii) by adopting recent advances in the second-order asymptotics for finite block length quantum coding (for both d-level 2- and 3-MUB QKD protocols). Since the finite and asymptotic secret key rates increase with d and the number of MUBs (together with the tolerable threshold) such QKD schemes could in principle offer an important advantage over BB84. We discuss the possibility of an experimental realization of the 3-MUB QKD protocol with the orbital angular momentum degrees of freedom of photons.
description: v4: close to the published version
Kohler, Oliver und Felger, Andreas: Eher mich selbst als dich vergessen Jerusalem
Creators: name: Thiede, Carsten Peter
Publisher: name: Jahrbuch für evangelikale Theologie
Year: 2025

description: 1822367573
description: Jahrbuch für evangelikale Theologie, V. 3 (1989): Jahrbuch für evangelikale Theologie, Band 3
Linear and non-linear perturbations in dark energy models
Creators: name: Escamilla-Rivera, Celia
name: Casarini, Luciano
name: Fabris, Julio C.
name: Alcaniz, Jailson S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this work we discuss observational aspects of three time-dependent parameterisations of the dark energy equation of state $w(z)$. In order to determine the dynamics associated with these models, we calculate their background evolution and perturbations in a scalar field representation. After performing a complete treatment of linear perturbations, we also show that the non-linear contribution of the selected $w(z)$ parameterisations to the matter power spectra is almost the same for all scales, with no significant difference from the predictions of the standard $Λ$CDM model.
description: 18 pages, 6 figures. Accepted in JCAP
Nonlinear modal interactions in parity-time (${\cal PT}$) symmetric lasers
Creators: name: Ge, Li
name: El-Ganainy, Ramy
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Parity-time ($\cal PT$) symmetric lasers have attracted considerable attention lately due to their promising applications and intriguing properties, such as free spectral range doubling and single-mode lasing. In this work we discuss nonlinear modal interactions in these laser systems under steady state conditions, and we demonstrate that several gain clamping scenarios can occur for lasing operation in the $\cal PT$-symmetric and $\cal PT$-broken phases. In particular, we show that, depending on the system's design and the external pump profile, its operation in the nonlinear regime falls into two different categories: in one the system is frozen in the $\cal PT$ phase space as the applied gain increases, while in the other the system is pulled towards its exceptional point. These features are first illustrated by a coupled mode formalism and later verified by employing the Steady-state Ab-initio Laser Theory (SALT). Our findings shine light on the robustness of single-mode operation in these lasers against saturation nonlinearity in $\cal PT$-symmetric lasers.
description: 11 pages, 8 figures
Thermalon mediated AdS to dS phase transitions in Einstein-Gauss-Bonnet-massive gravity
Creators: name: Ponglertsakul, Supakchai
name: Channuie, Phongpichit
name: Samart, Daris
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this work, gravitational phase transition emerging from anti de-Sitter (AdS) to de-Sitter (dS) vacua in Einstein-Gauss-Bonnet-massive gravity (EGBMG) is considered. We determine the location of thermalon (a static bubble solution in Euclidean space) which exists in casually connected two regions of the spacetime. The thermalon plays a major role in gravitational phase transition by inducing the decay of the negative effective cosmological constant to the positive one due to the higher-order gravity effects. The thermodynamics phase space of the Hawking temperature and free energy is investigated in details. We find that the free energy of the thermalon is always negative at the maximum of Hawking temperature for all possible values of the Gauss-Bonnet couplings. This means that the phase transition mediated by thermalon from AdS to dS asymptotics is inevitable according to the presence of the massive gravity. More importantly, the parameters of the massive gravity behave similarly to the order parameters in the phase transition instead of the Gauss-Bonnet coupling.
description: 20 pages, 6 figures
Improved calculation of the gravitational wave spectrum from kinks on infinite cosmic strings
Creators: name: Matsui, Yuka
name: Horiguchi, Koichiro
name: Nitta, Daisuke
name: Kuroyanagi, Sachiko
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Gravitational wave observations provide unique opportunities to search for cosmic strings. One of the strongest sources of gravitational waves is discontinuities of cosmic strings, called kinks, which are generated at points of intersection. Kinks on infinite strings are known to generate a gravitational wave background over a wide range of frequencies. In this paper, we calculate the spectrum of the gravitational wave background by numerically solving the evolution equation for the distribution function of the kink sharpness. We find that the number of kinks for small sharpness is larger than the analytical estimate used in a previous work, which makes a difference in the spectral shape. Our numerical approach also helps to avoid the use of analytic approximations, and enables us to make a more precise prediction on the spectral amplitude for future gravitational wave experiments.
description: 15pages, 7 figures, 2 tables, accepted for Journal of Cosmology and Astroparticle Physics
A QCD sum rule study for a charged bottom-strange scalar meson
Creators: name: Zanetti, C. M.
name: Nielsen, M.
name: Khemchandani, K. P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Using the QCD sum rule approach we investigate the possible four-quark structure for the new observed $B_{s}^0π^\pm$ narrow structure (D0). We use a diquak-antidiquark scalar current and work to the order of $m_s$ in full QCD, without relying on $1/m_Q$ expansion. Our study indicates that although it is possible to obtain a stable mass in agreement with the state found by the D0 collaboration, a more constraint analysis (simultaneous requirement of the OPE convergence and the dominance of the pole on the phenomenological side) leads to a higher mass. We also predict the masses of the bottom scalar tetraquark resonances with zero and two strange quarks.
description: 8 pages, 8 figures
Thermal Processing of Solids Encountering a Young Jovian Core
Creators: name: Barnett, Megan N.
name: Ciesla, Fred J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Jupiter's enhancement in nitrogen relative to hydrogen when compared to the Sun has been interpreted as evidence that its early formation occurred beyond the N$_{2}$ snowline ($\sim$ 20-40 AU). However, the rapid growth necessary to form Jupiter before the dissipation of the solar nebula would lead to the forming planet's core reaching very high temperatures ($>$1000 K), which would lead to it warming its surroundings. Here, we explore the effects of a luminous planetary core on the solids that it ultimately accretes. We find that a critical transition occurs where very hot (rapidly accreting) cores drive off volatiles prior to accretion, while cool cores (slowly accreting) are able to inherit volatile rich solids. Given Jupiter's nitrogen enrichment, if it formed beyond the N$_{2}$ snowline, its core could not have accreted solids at a rate above 10$^{-10}$ M$_{\odot}$ yr$^{-1}$. Our results suggest that either Jupiter formed in more distal regions of the solar nebula, or nitrogen loss was suppressed, either by its incorporation in more refractory carriers or because it was trapped within ices which devolatilized at higher temperatures.
description: Accepted to the Astrophysical Journal, 11 pages, 5 figures
Three-dimensional Hubbard model in the thermodynamic limit
Creators: name: Khatami, Ehsan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We employ the numerical linked-cluster expansion to study finite-temperature properties of the uniform cubic lattice Hubbard model in the thermodynamic limit for a wide range of interaction strengths and densities. We carry out the expansion to the 9th order and find that the convergence of the series extends to lower temperatures as the strength of the interaction increases, giving us access to regions of the parameter space that are difficult to reach by most other numerical methods. We study the precise trends in the specific heat, the double occupancy, and magnetic correlations at temperatures as low as 0.2 of the hopping amplitude in the strong-coupling regime. We show that in this regime, accurate estimates for transition temperatures to the Néel ordered phase, in agreement with the predicted asymptotic behavior, can be deduced from the low-temperature magnetic structure factor. We also find evidence for possible instability to the magnetically ordered phase away from, but close to, half filling. Our results have important implications for parametrizing fermionic systems in optical lattice experiments and for benchmarking other numerical methods.
description: 8 pages, 6 figures