cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quasiclassical theory of non-adiabatic tunneling in nanocontacts induced by phase-controlled ultrashort light pulses
Creators: name: Kim, Sangwon
name: Schmude, Tobias
name: Burkard, Guido
name: Moskalenko, Andrey S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We theoretically investigate tunneling through free-space or dielectric nanogaps between metallic nanocontacts driven by ultrashort ultrabroadband light pulses. For this purpose we develop a time-dependent quasiclassical theory being especially suitable to describe the tunneling process in the non-adiabatic regime, when this process can be significantly influenced by the photon absorption as the electron moves in the classically forbidden region. Firstly, the case of driving by an ideal half-cycle pulse is studied. For different distances between the contacts, we analyze the main solutions having the form of a quasiclassical wave packet of the tunneling electron and an evanescent wave of the electron density. For each of these solutions the resulting tunneling probability is determined with the exponential accuracy inherent to the method. We identify a crossover between two tunneling regimes corresponding to both solutions in dependence on the field strength and intercontact distance that can be observed in the corresponding behaviour of the tunneling probability. Secondly, considering realistic temporal profiles of few-femtosecond pulses, we demonstrate that the preferred direction of the electron transport through the nanogap can be controlled by changing the carrier-envelope phase of the pulse, in agreement with recent experimental findings and numerical simulations. We find analytical expressions for the tunneling probability, determining the resulting charge transfer in dependence on the pulse parameters. Further, we determine temporal shifts of the outgoing electron trajectories with respect to the peaks of the laser field in dependence on the pulse phase and illustrate when the non-adiabatical character of the tunneling process is particularly important.
description: 38 pages, 13 figures
Curved One-Dimensional Wire as a Spin Rotator
Creators: name: Trushin, Maxim P.
name: Chudnovskiy, Alexander L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose a semiconductor structure that can rotate the electron spin without using ferromagnetic contacts, tunneling barriers, external radiation etc. The structure consists of a strongly curved one-dimensional ballistic wire with intrinsic spin-orbit interactions of Rashba type. Our calculations and analytical formulae show that the proposed device can redistribute the current densities between the two spin-split modes without backscattering and, thus, serve as a reflectionless and high-speed spin switcher. Using parameters relevant for InAs we investigate the projection of current density spin polarization on the spin-quantization axis as a function of the Rashba constant, external magnetic field, and radius of the wire's curvature.
description: 10 pages, 6 figures; replaced with considerably extended version
Earthquake Hazard Mitigation of Transportation Facilites for Christian County
Creators: name: Fleckenstein, L. John
name: Allen, David L.
name: Drnevich, Vincent P.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1989
Subjects: subject: Transportation Engineering

description: Concern has grown in recent years over the seismic activity of the New Madrid seismic zone in Western Kentucky. Christian County, Kentucky is located in this region. To permit emergency medical, supply, and equipment traffic into this area after an earthquake has occurred, the Kentucky Transportation Cabinet is interested in the possibility of keeping selected routes passable. This report lists the routes that have been investigated and recommended as being the routes in Christian County that should be maintained in a passable condition. The recommended routes, US 68/KY 80, US 41, US 41A and KY 91 have been visually surveyed and all seismically significant features cataloged. These features are logged by their location on strip maps contained in Appendix A and a detailed listing of all the potentially critical features is given in Appendix B.
Noise-induced inhibitory suppression of malfunction neural oscillators
Creators: name: Tessone, C. J.
name: Ullner, E.
name: Zaikin, A. A.
name: Kurths, J.
name: Toral, R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Motivated by the aim to find new medical strategies to suppress undesirable neural synchronization we study the control of oscillations in a system of inhibitory coupled noisy oscillators. Using dynamical properties of inhibition, we find regimes when the malfunction oscillations can be suppressed but the information signal of a certain frequency can be transmitted through the system. The mechanism of this phenomenon is a resonant interplay of noise and the transmission signal provided by certain value of inhibitory coupling. Analyzing a system of three or four oscillators representing neural clusters, we show that this suppression can be effectively controlled by coupling and noise amplitudes.
description: 10 pages, 14 figures
Additional file 1 of Convergent depression of activity-dependent bulk endocytosis in rodent models of autism spectrum disorder
Creators: name: Bonnycastle, Katherine
name: Nawaz, Mohammed Sarfaraz
name: Kind, Peter C.
name: Cousin, Michael A.
Publisher: name: figshare
Year: 2025
Subjects: subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Science Policy
subject: Biological Sciences not elsewhere classified
subject: Mental Health

description: Supplementary Material 1
Poisson equation for genus two string invariants: a conjecture
Creators: name: Basu, Anirban
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Number Theory (math.NT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider some string invariants at genus two that appear in the analysis of the $D^8\mathcal{R}^4$ and $D^6\mathcal{R}^5$ interactions in type II string theory. We conjecture a Poisson equation involving them and the Kawazumi--Zhang invariant based on their asymptotic expansions around the non--separating node in the moduli space of genus two Riemann surfaces.
description: 14 pages, LaTeX; 3 figures
Der Sozialhirtenbrief der katholischen Bischöfe Österreichs im gegenwärtigen europäischen Kontext
Creators: name: Dantine, Johannes
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 40 Nr. 4 (1991): Ökumenische Rundschau, Band 40, Heft 4
2-matrix versus complex matrix model, integrals over the unitary group as triangular integrals
Creators: name: Eynard, B.
name: Ferrer, A. Prats
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We prove that the 2-hermitean matrix model and the complex-matrix model obey the same loop equations, and as a byproduct, we find a formula for Itzykzon-Zuber's type integrals over the unitary group. Integrals over U(n) are rewritten as gaussian integrals over triangular matrices and then computed explicitly. That formula is an efficient alternative to the former Shatashvili's formula.
description: 29 pages, Latex
Earthquake Hazard Mitigation of Transportation Facilites for Calloway County
Creators: name: Fleckenstein, L. John
name: Allen, David L.
name: Drnevich, Vincent P.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1989
Subjects: subject: Transportation Engineering

description: Concern has grown in recent years over the seismic activity of the New Madrid seismic zone in Western Kentucky. Calloway County, Kentucky is located in this region. To permit emergency medical, supply, and equipment traffic into this area after an earthquake has occurred, the Kentucky Transportation Cabinet is interested in the possibility of keeping selected routes passable. This report lists the routes that have been investigated and recommended as being the routes in Calloway County that should be maintained in a passable condition. The recommended routes, KY 94, US 641, and KY 121 have been visually surveyed and all seismically significant features cataloged. These features are logged by their location on strip maps contained in Appendix A and a detailed listing of all the potentially critical features is given in Appendix B.
Tidally excited oscillations in hot white dwarfs
Creators: name: Yu, Hang
name: Fuller, Jim
name: Burdge, Kevin B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We study the flux variation in helium white dwarfs (WDs) induced by dynamical tides for a variety of WD models with effective temperatures ranging from $T$=10 kK to $T$=26 kK. At linear order, we find the dynamical tide can significantly perturb the observed flux in hot WDs. If the temperature $T\gtrsim14$ kK, then the dynamical tide may induce a fractional change in the flux by >1% when the orbital period is $P_{\rm orb}\simeq 20-60\,{\rm min}$. The ratio between the flux modulation due to the dynamical tide and that due to the equilibrium tide (i.e., ellipsoidal variability) increases as the WD's radius decreases, and it could exceed O(10) if the WD has a radius $R\lesssim0.03 R_\odot$. Unlike the ellipsoidal variability which is in phase with the orbital motion, the pulsation caused by the dynamical tide may have a substantial phase shift. A cold WD with $T\lesssim 10$ kK, on the other hand, is unlikely to show observable pulsations due to the dynamical tide. At shorter orbital periods, the dynamical tide may become highly nonlinear. We approximate this regime by treating the waves as one-way traveling waves and find the flux variation is typically reduced to 0.1%-1% and the excess phase is likely to be 90 degrees (though with large uncertainty). Even in the traveling-wave limit, the flux perturbation due to dynamical tide could still exceed the ellipsoidal variability for compact WDs with $R\lesssim0.02 R_\odot$. We further estimate the nonlinear flux perturbations oscillating at four times the orbital frequency dominated by a self-coupled parent g-mode driving low-order daughter p-modes. The nonlinear flux variation could be nearly 50% of the linear variation for very hot WD models with $T\gtrsim26$ kK and 1% linear flux variation. We thus predict both the linear and nonlinear flux variations due to dynamical tides are likely to have significant observational signatures.
description: 17 pages, 14 figures, submitted to MNRAS
O($D$,$D$)-covariant two-loop $β$-functions and Poisson-Lie T-duality
Creators: name: Hassler, Falk
name: Rochais, Thomas B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that the one- and two-loop $β$-functions of the closed, bosonic string can be written in a manifestly O($D$,$D$)-covariant form. Based on this result, we prove that 1) Poisson-Lie symmetric $σ$-models are two-loop renormalisable and 2) their $β$-functions are invariant under Poisson-Lie T-duality. Moreover, we identify a distinguished scheme in which Poisson-Lie symmetry is manifest. It simplifies the calculation of two-loop $β$-functions significantly and thereby provides a powerful new tool to advance into the quantum regime of integrable $σ$-models and generalised T-dualities. As an illustrating example, we present the two-loop $β$-functions of the integrable $λ$- and $η$-deformation.
description: 44 pages, 2 tables
QCD string from D0 branes
Creators: name: Billo, M.
name: Caselle, M.
name: Hasenbusch, M.
name: Panero, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We report the results of a set of high precision simulations performed in the 3d gauge Ising model. We evaluated the interquark potential and the first few energy levels and compared them with the predictions obtained with the effective Nambu-Goto string and with the free bosonic string. The data are precise enough to unambiguously distinguish between the free string predictions and those obtained using the N-G effective string. At large distances we find a remarkable agreement between Monte Carlo data and N-G predictions for the first excited energy level, while the free string picture is definitely excluded. As the interquark distance is decreased (and/or the finite temperature becomes higher) the Monte Carlo results show larger and larger deviations both from the N-G and from the free string predictions. In order to better understand this behaviour we re-derived the effective Nambu-Goto theory result for the Polyakov loop correlator using a covariant quantization. We chose as boundary conditions those of an open string attached to two D0-branes at spatial distance $R$, in a target space with compact euclidean time. Obviously our treatment is fully consistent only in $d=26$. The extension to generic $d$ requires taking into account the Liouville mode of Polyakov's formulation. The analogy with the standard light cone calculation suggests that the contribution due to the Liouville field can be neglected for large $R$. At shorter scales, the Liouville mode cannot be neglected and its contribution to the interquark potential might be the source of the discrepancies with respect to the effective N-G results that we observe in our Monte Carlo simulations.
description: 6 pages, 2 figures, talk presented at Lattice 2005
ISCOs in AdS/CFT
Creators: name: Berenstein, David
name: Li, Ziyi
name: Simon, Joan
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study stable circular orbits in spherically symmetric AdS black holes in various dimensions and their limiting innermost stable circular orbits (ISCOs). We provide analytic expressions for their size, angular velocity and angular momentum in a large black hole mass regime. The dual interpretation is in terms of meta-stable states not thermalising in typical thermal scales and whose existence is due to non-perturbative effects on the spatial curvature. Our calculations reproduce the binding energy known in the literature, but also include a binding energy in the radial fluctuations corresponding to near circular trajectories. We also describe how particles are placed on these orbits from integrated operators on the boundary: they tunnel inside in a way that can be computed from both complex geodesics in the black hole background and from the WKB approximation of the wave equation. We explain how these two computations are related.
description: 15 pages, 1 figure. v2: Added references, improved discussion on relations of this work to the Bootstrap
Earthquake Hazard Mitigation of Transportation Facilites for Graves County
Creators: name: Fleckenstein, L. John
name: Allen, David L.
name: Drnevich, Vincent P.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1989
Subjects: subject: Transportation Engineering

description: Concern has grown in recent years over the seismic activity of the New Madrid seismic zone in Western Kentucky. Graves County, Kentucky is located in this region. To permit emergency medical, supply, and equipment traffic into this area after an earthquake has occurred, the Kentucky Transportation Cabinet is interested in the possibility of keeping selected routes passable. This report lists the routes that have been investigated and recommended as being the routes in Graves County that should be maintained in a passable condition. The recommended routes, KY 94, KY 121, KY 58/KY 80, US 45/KY 58, US 45, and KY 58, have been visually surveyed and all seismically significant features cataloged. These features are logged by their location on strip maps contained in Appendix A and a detailed listing of all the potentially critical features is given in Appendix B.
Quantum Key Distribution in a Multi-User Network at Gigahertz Clock rates
Creators: name: Fernandez, Veronica
name: Gordon, Karen J.
name: Collins, Robert J.
name: Townsend, Paul D.
name: Cova, Sergio D.
name: Rech, Ivan
name: Buller, Gerald S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In recent years quantum information research has lead to the discovery of a number of remarkable new paradigms for information processing and communication. These developments include quantum cryptography schemes that offer unconditionally secure information transport guaranteed by quantum-mechanical laws. Such potentially disruptive security technologies could be of high strategic and economic value in the future. Two major issues confronting researchers in this field are the transmission range (typically <100km) and the key exchange rate, which can be as low as a few bits per second at long optical fiber distances. This paper describes further research of an approach to significantly enhance the key exchange rate in an optical fiber system at distances in the range of 1-20km. We will present results on a number of application scenarios, including point-to-point links and multi-user networks. Quantum key distribution systems have been developed, which use standard telecommunications optical fiber, and which are capable of operating at clock rates of up to 2GHz. They implement a polarization-encoded version of the B92 protocol and employ vertical-cavity surface-emitting lasers with emission wavelengths of 850 nm as weak coherent light sources, as well as silicon single-photon avalanche diodes as the single photon detectors. The point-to-point quantum key distribution system exhibited a quantum bit error rate of 1.4%, and an estimated net bit rate greater than 100,000 bits- per second for a 4.2 km transmission range.
description: Presented at SPIE Symposium on Microtechnologies for the New Millennium, Sevilla, Spain (May 2005)
Spacetime Deformations and Electromagnetism in Material Media
Creators: name: da Rocha, R.
name: Freire, I. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Classical Physics (physics.class-ph)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: This paper is intended to investigate the relation between electrodynamics in anisotropic material media and its analogous formulation in an spacetime, with non-null Riemann curvature tensor. After discussing the electromagnetism via chiral differential forms, we point out the optical activity of a given material medium, closely related to topological spin, and the Faraday rotation, associated to topological torsion. Both quantities are defined in terms of the magnetic potential and the electric and magnetic fields and excitations. We revisit some properties of material media and the associated Green dyadics. Some related features of ferrite are also investigated. It is well-known that the constitutive tensor is essentially equivalent to the Riemann curvature tensor. In order to investigate the propagation of electromagnetic waves in material media, we prove that it is analogous to consider the electromagnetic wave propagation in the vacuum, but this time in a curved spacetime, which is obtained by a deformation of the lorenztian metric of Minkowski spacetime. Spacetime deformations leave invariant the form of Maxwell equations. Also, there exists a close relation between Maxwell equations in curved spacetime and in an anisotropic material medium, indicating that electromagnetism and spacetime properties are deeply related. Besides, the geometrical aspects of wave propagation can be described by an effective geometry which represents a deformation of the lorentzian metric of Minkowski spacetime.
description: 21 pages
Driven-dissipative control of cold atoms in tilted optical lattices
Creators: name: Sharma, Vaibhav
name: Mueller, Erich J
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a sequence of driven-dissipative protocols for controlling cold atoms in tilted optical lattices. These experimentally accessible examples are templates that demonstrate how dissipation can be used to manipulate quantum many-body systems. We consider bosonic atoms trapped in a tilted optical lattice, immersed in a superfluid bath, and excited by coherent Raman lasers. With these ingredients, we are able to controllably transport atoms in the lattice and produce self-healing quantum states: a Mott insulator and the topologically ordered spin-1 AKLT state.
description: Published version after response to referee comments
Earthquake Hazard Mitigation of Transportation Facilites for Fulton County
Creators: name: Fleckenstein, L. John
name: Allen, David L.
name: Drnevich, Vincent P.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1989
Subjects: subject: Transportation Engineering

description: Concern has grown in recent years over the seismic activity of the New Madrid seismic zone in Western Kentucky. Fulton County, Kentucky is located in this region. To permit emergency medical, supply, and equipment traffic into this area after an earthquake has occurred, the Kentucky Transportation Cabinet is interested in the possibility of keeping selected routes passable. This report lists the routes that have been investigated and recommended as being the routes in Fulton County that should be maintained in a passable condition. The recommended routes, US 45, KY 94, KY 125, and KY 166 have been visually surveyed and all seismically significant features cataloged. These features are logged by their location on strip maps contained in Appendix A and a detailed listing of all the potentially critical features is given in Appendix B.
Calculation of Forces on the High Granularity Calorimeter Stainless Steel Absorber Plates in the Compact Muon Solenoid Magnetic Field
Creators: name: Klyukhin, Vyacheslav
Publisher: name: arXiv
Year: 2024
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The general-purpose Compact Muon Solenoid (CMS) detector at the Large Hadron Collider (LHC) at CERN includes the hadronic calorimeter to register the energies of the charged and neutral hadrons produced in the proton-proton collisions at the LHC at a centre of mass energy 13.6 TeV. The calorimeter is located inside the superconducting solenoid of 6 m in diameter and 12.5 m in length creating the central magnetic flux density of 3.8 T. For operating optimally in the high pileup and high radiation environment of the High Luminosity LHC, the existing CMS endcap calorimeters will be replaced with a new high granularity calorimeter (HGCal) comprising of an electromagnetic and a hadronic section in each of the two endcaps. The hadronic section of the HGCAL will include 44 stainless steel absorber plates with a relative permeability value well below 1.05. The volume occupied by 22 plates in each endcap is about 21 m$^{3}$. The calculation of the axial electromagnetic forces on the absorber plates is a crucial element in designing the mechanical construction of the device. With a three-dimensional computer model of the CMS magnet, the axial forces on each absorber plate are calculated and the dependence of forces on the central magnetic flux density value is presented. The method of calculation and the obtained results are discussed.
description: 9 pages, 9 figures, 5 equations, 9 references. Presented at Symmetry 2023 - The 4th International Conference on Symmetry, Barcelona, Spain, 21-23 June 2023
Continuous surrogate-based optimization algorithms are well-suited for expensive discrete problems
Creators: name: Karlsson, Rickard
name: Bliek, Laurens
name: Verwer, Sicco
name: de Weerdt, Mathijs
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: Machine Learning (cs.LG)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: One method to solve expensive black-box optimization problems is to use a surrogate model that approximates the objective based on previous observed evaluations. The surrogate, which is cheaper to evaluate, is optimized instead to find an approximate solution to the original problem. In the case of discrete problems, recent research has revolved around surrogate models that are specifically constructed to deal with discrete structures. A main motivation is that literature considers continuous methods, such as Bayesian optimization with Gaussian processes as the surrogate, to be sub-optimal (especially in higher dimensions) because they ignore the discrete structure by, e.g., rounding off real-valued solutions to integers. However, we claim that this is not true. In fact, we present empirical evidence showing that the use of continuous surrogate models displays competitive performance on a set of high-dimensional discrete benchmark problems, including a real-life application, against state-of-the-art discrete surrogate-based methods. Our experiments on different discrete structures and time constraints also give more insight into which algorithms work well on which type of problem.
description: 16 pages, 3 figures; added keywords, typos corrected, additional information in Figure 3 but results unchanged
Sub-sampled Cross-component Prediction for Emerging Video Coding Standards
Creators: name: Li, Junru
name: Wang, Meng
name: Zhang, Li
name: Wang, Shiqi
name: Zhang, Kai
name: Wang, Shanshe
name: Ma, Siwei
name: Gao, Wen
Publisher: name: arXiv
Year: 2020
Subjects: subject: Multimedia (cs.MM)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Cross-component linear model (CCLM) prediction has been repeatedly proven to be effective in reducing the inter-channel redundancies in video compression. Essentially speaking, the linear model is identically trained by employing accessible luma and chroma reference samples at both encoder and decoder, elevating the level of operational complexity due to the least square regression or max-min based model parameter derivation. In this paper, we investigate the capability of the linear model in the context of sub-sampled based cross-component correlation mining, as a means of significantly releasing the operation burden and facilitating the hardware and software design for both encoder and decoder. In particular, the sub-sampling ratios and positions are elaborately designed by exploiting the spatial correlation and the inter-channel correlation. Extensive experiments verify that the proposed method is characterized by its simplicity in operation and robustness in terms of rate-distortion performance, leading to the adoption by Versatile Video Coding (VVC) standard and the third generation of Audio Video Coding Standard (AVS3).
Investigation of the 6He cluster structures
Creators: name: Giot, L.
name: Roussel-Chomaz, P.
name: Demonchy, C. E.
name: Mittig, W.
name: Savajols, H.
name: Alamanos, N.
name: Auger, F.
name: Gillibert, A.
name: Jouanne, C.
name: Lapoux, V.
name: Nalpas, L.
name: Pollacco, E. C.
name: Sida, J. L.
name: Skaza, F.
name: Cortina-Gil, M. D.
name: Fernandez-Vasquez, J.
name: Mackintosh, R. S.
name: Pakou, A.
name: Pita, S.
name: Rodin, A.
name: Stepantsov, S.
name: Ter Akopian, G. M.
name: Rusek, K.
name: Thompson, I. J.
name: Wolski, R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The 4He+2n and t+t clustering of the 6He ground state were investigated by means of the transfer reaction 6He(p,t)4He at 25 MeV/nucleon. The experiment was performed in inverse kinematics at GANIL with the SPEG spectrometer coupled to the MUST array. Experimental data for the transfer reaction were analyzed by a DWBA calculation including the two neutrons and the triton transfer. The couplings to the 6He --> 4He + 2n breakup channels were taken into account with a polarization potential deduced from a coupled-discretized-continuum channels analysis of the 6He+1H elastic scattering measured at the same time. The influence on the calculations of the 4He+t exit potential and of the triton sequential transfer is discussed. The final calculation gives a spectroscopic factor close to one for the 4He+2n configuration as expected. The spectroscopic factor obtained for the t+t configuration is much smaller than the theoretical predictions.
description: 10 pages, 11 figures, accepted in PRC
Properties of self-gravitating quasi-stationary states
Creators: name: Labini, Francesco Sylos
name: Capuzzo-Dolcetta, Roberto
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Initially far out-of-equilibrium self-gravitating systems form, through a collisionless relaxation dynamics, quasi-stationary states (QSS). These may arise from a bottom-up aggregation of structures or in a top-down frame; their quasi-equilibrium properties are well described by the Jeans equation and are not universal, i.e. they depend on initial conditions. To understand the origin of such dependence, we present results of numerical experiments of initially cold and spherical systems characterized by various choices of the spectrum of initial density fluctuations. The amplitude of such fluctuations determines whether the system relaxes in a top-down or a bottom-up manner. We find that statistical properties of the resulting QSS mainly depend upon the amount of energy exchanged during the formation process. In particular, in the violent top-down collapses the energy exchange is large and the QSS show an inner core with an almost flat density profile and a quasi Maxwell-Boltzmann (isotropic) velocity distribution, while their outer regions display a density profile $ρ(r) \propto r^{-α}$ ($α>0$) with radially elongated orbits. We analytically show that $α=4$ in agreement with numerical experiments. In the less violent bottom-up dynamics, the energy exchange is much smaller, the orbits are less elongated and $0< α(r) \le 4$, with a a density profile well fitted by the Navarro-Frenk-White behavior. Such a dynamical evolution is shown by both non-uniform spherical isolated systems and by halos extracted from cosmological simulations. We consider the relation of these results with the core-cusp problem concluding that this is naturally solved if galaxies form through a monolithic collapse.
description: 15 pages, 24 figures. Accepted for publication in Astronomy and Astrophysics. The revised verion matches the published version
Two-site entropy and quantum phase transitions in low-dimensional models
Creators: name: Legeza, Ö.
name: Sólyom, J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We propose a new approach to study quantum phase transitions in low-dimensional lattice models. It is based on studying the von Neumann entropy of two neighboring central sites in a long chain. It is demonstrated that the procedure works equally well for fermionic and spin models, and the two-site entropy is a better indicator of quantum phase transition than calculating gaps, order parameters or the single-site entropy. The method is especially convenient when the density-matrix renormalization-group (DMRG) algorithm is used.
description: 4 pages, 7 figures
Probing coherence and noise tolerance in discrete-time quantum walks: unveiling self-focusing and breathing dynamics
Creators: name: Buarque, A. R. C.
name: Dias, W. S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The sensitivity of quantum systems to external disturbances is a fundamental problem for the implementation of functional quantum devices, quantum information and computation. Based on remarkable experimental progress in optics and ultra-cold gases, we study the consequences of a short-time (instantaneous) noise while an intensity-dependent phase acquisition is associated with a qubit propagating on $N$-cycle. By employing quantum coherence measures, we report emerging unstable regimes in which hitherto unknown quantum walks arise, such as self-focusing and breathing dynamics. Our results unveil appropriate settings which favor the stable regime, with the asymptotic distribution surviving for weak nonlinearities and disappearing in the thermodynamic limit with $1/N$. The diagram showing the threshold between different regimes reveals the quantum gates close to Pauli-Z as more noise-tolerant. As we move towards the Pauli-X quantum gate, such aptness dramatically decreases and the threshold to self-focusing regime becomes almost unavoidable. Quantum gates close to Hadamard exhibit an unusual aspect, in which an increment of the nonlinear strength can remove the dynamics from self-focusing regime.
description: 4 figures, 6 pages
Fast forward evolution in heat equation:Tunable heat transport in adiabatic regime
Creators: name: Matrasulov, J.
name: Yusupov, J. R.
name: Saidov, A. A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider the problem of fast forward evolution of the processes described in terms of the heat equation. The matter is considered on an adiabatically expanding time-dependent box. Attention is paid to acceleration of heat transfer processes. So called shortcuts to adiabaticity, implying fast forwarding of the adiabatic states are studied. Heat flux and temperature profiles are analyzed for standard and fast forwarded regimes.
Geometrization of some quantum mechanics formalism
Creators: name: Ol'khov, O. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: There were many attempts to geometrize electromagnetic field and find out new interpretation for quantum mechanics formalism. The distinctive feature of this work is that it combines geometrization of electromagnetic field and geometrization of material field within the unique topological idea. According to the suggested topological interpretation, the Dirac equations for a free particle and for a hydrogen atom prove to be the group--theoretical relations that account for the symmetry properties of localized microscopic deviations of the space--time geometry from the pseudoeuclidean one (closed topological 4-manifolds). These equations happen to be written in universal covering spaces of the above manifolds. It is shown that "long derivatives" in Dirac equation for a hydrogen atom can be considered as covariant derivatives of spinors in the Weyl noneuclidean 4-space and that electromagnetic potentials can be considered as connectivities in this space. The gauge invariance of electromagnetic field proves to be a natural consequence of the basic principles of the proposed geometrical interpretation. Within the suggested concept, atoms have no inside any point-like particles (electrons) and this can give an opportunity to overcome the difficulties of atomic physics connected with the many-body problem.
description: 9 pages
Structure, preparation, and applications of 2D material-based metal-semiconductor heterostructures
Creators: name: Tan, Junyang
name: Li, Shisheng
name: Liu1, Bilu
name: Cheng, Hui-Ming
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Two-dimensional (2D) materials family with its many members and different properties has recently drawn great attention. Thanks to their atomic thickness and smooth surface, 2D materials can be constructed into heterostructures or homostructures in the fashion of out-of-plane perpendicular stacking or in-plane lateral stitching, resulting in unexpected physical and chemical properties and applications in many areas. In particular, 2D metal-semiconductor heterostructures or homostructures (MSHSs) which integrate 2D metals and 2D semiconductors, have shown great promise in future integrated electronics and energy-related applications. In this review, MSHSs with different structures and dimensionalities are first introduced, followed by several ways to prepare them. Their applications in electronics and optoelectronics, energy storage and conversion, and their use as platforms to exploit new physics are then discussed. Finally, we give our perspectives about the challenges and future research directions in this emerging field.
description: 52 pages, 8 figures
The negotiation of gender and power in medieval German writings
Creators: name: Hempen, Daniela
Publisher: name: University of British Columbia
Year: 2009

description: Drawing on insights from feminist scholarship and gender studies, this thesis offers a new reading of selected medieval German texts with a special emphasis on the negotiation of gender and power. All three parts of the thesis demonstrate how the use of modern theories helps us to re-examine a medieval text's implications and ethical values, and to reconsider traditional views of the text. Part One focuses on the discussion of gender boundaries. Didactic and fictional texts, such as Thomasin von Zerclaere's Der welsche Gast and Ulrich von Liechtenstein's Frauendienst, show that violations of gender boundaries and the questioning of the traditional power relationship between the genders are crucial to the textual negotiation of masculinity and femininity. As I demonstrate in Part Two, the unequal relationship between men and women is especially important for the system of male homosocial bonding underlying medieval society. Examples of the physical and symbolic exchange of women and their favours are offered by didactic texts, such as Marquard vom Stein's Der Ritter vom Turn, and fictional texts, such as the Nibelungenlied. Aspects of this exchange are not solely related to medieval marriage practices, but are also reflected in courtly rituals, such as "frouwen schouwen" (watching the ladies). The importance of the conventionally beautiful female body as an object of exchange becomes obvious in Part Three, where I examine encounters between Christian knights and women defying the norms of feminine beauty. Here I focus on female figures that are defined as "doubly Other": both in their relationship to the masculine Self, and in their relationship to the ideal of medieval Christian femininity. Texts such as Wolfdietrich B and Der Strieker's Die Konigin vom Mohrenland show how the negotiation of gender and power assumes a new dimension in light male encounters with Wild Women, heathen women, "supernatural" women and old women, where the male partner often has to struggle to uphold his privileged masculine position.
Mentoring relationships in academe: an examination of underrepresented racial minorities’ graduate school experience
Creators: name: Palmer, Catrina
Publisher: name: No Publisher Supplied
Year: 2021

description: Recent research has provided evidence that underrepresented racial minorities receive substantially less support than their White and Asian counterparts from academic advisors. This presents a critical issue: beyond providing custodial duties, advisors are also known to supply their current and former students with intangible support such as advocacy, coaching, and ongoing support in graduate school and in their early careers. Hence, in order to better understand how to retain a diverse faculty in the professoriate, I examine the circumstances in which an advisor is likely to take on a mentoring role in the advising relationship, i.e., one that extends beyond their custodial duties, for White and Asian versus for underrepresented racial minority doctoral students. In doing so, I extend the mentoring literature, showing that, in the context of academia, the progression of mentorship through distinct stages (i.e., initiation, cultivation, and separation or redefinition) cannot be understood without considering what takes place in the early stages of the relationship through graduate school and into the first academic job of the advisee. To better understand the behavioral processes that define the progression of advising relationships, I use a multi-method design including in-depth interviews, a survey, and the construction of a database of research publications conducted jointly by junior faculty members and their former dissertation advisors in the context of a business school setting. In examining the development and transformation of the relationship between the advisee and advisor, I shed light on underrepresented racial minorities’ career progression in the academic pipeline.
Is the anti-correlation between the X-ray variability amplitude and black hole mass of AGNs intrinsic?
Creators: name: Liu, Yuan
name: Zhang, Shuang Nan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims. Both the black hole mass and the X-ray luminosity of AGNs have been found to be anti-correlated with the normalized excess variance ($σ_{\rm rms}^2 $) of the X-ray light curves. We investigate which correlation with $σ_{\rm rms}^2 $ is the intrinsic one. Methods. We divide a full sample of 33 AGNs (O' Neill et al. 2005) into two sub-samples. The black hole masses of 17 objects in sub-sample 1 were determined by the reverberation mapping or the stellar velocity dispersion. The black hole masses of the remaining 16 objects were estimated from the relationship between broad line region radius and optical luminosity (sub-sample 2). Then partial correlation analysis, ordinary least squares regression and K-S tests are performed on the full sample and the sub-samples, respectively. Results. We find that $σ_{\rm rms}^2 $ seems to be intrinsically correlated with the black hole mass in the full sample. However, this seems to be caused by including the sub-sample 2 into the analysis, which introduces an extra correlation between the black hole mass and the luminosity and strengthens any correlation with the black hole mass artificially. Therefore, the results from the full sample may be misleading. The results from the sub-sample 1 show that the correlation between $σ_{\rm rms}^2 $ and the X-ray luminosity may be the intrinsic one and therefore the anti-correlation between $σ_{\rm rms}^2 $ and the black hole mass is doubtful.
description: 3 pages, 3 figures, 2 tables, accepted for publication in A&A (Research Note)
Additional file 1 of Phantom-based training of ultrasound-guided breast biopsy in medical education: a randomized controlled trial comparing handheld and high-end ultrasound
Creators: name: Greiner, Barbara
name: Akers, Michael
name: Zeman, Florian
name: Goetz, Andrea
name: Brandenstein, Moritz
name: Stroszczynski, Christian
name: Jung, Ernst Michael
name: Hammer, Simone
Publisher: name: figshare
Year: 2025
Subjects: subject: Space Science
subject: Medicine
subject: Neuroscience
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Mental Health

description: Supplementary Material 1
Normalization for Cubical Type Theory
Creators: name: Sterling, Jonathan
name: Angiuli, Carlo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Logic (math.LO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We prove normalization for (univalent, Cartesian) cubical type theory, closing the last major open problem in the syntactic metatheory of cubical type theory. Our normalization result is reduction-free, in the sense of yielding a bijection between equivalence classes of terms in context and a tractable language of $β/η$-normal forms. As corollaries we obtain both decidability of judgmental equality and the injectivity of type constructors.
description: LICS 2021
Der Uniatismus und der Dialog zwischen der Römisch-Katholischen Kirche und der Orthodoxen Kirche
Creators: name: Basarab, Mircea
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 40 Nr. 4 (1991): Ökumenische Rundschau, Band 40, Heft 4
Expectation maximization as message passing
Creators: name: Dauwels, J.
name: Korl, S.
name: Loeliger, H. -A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Information Theory (cs.IT)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Based on prior work by Eckford, it is shown how expectation maximization (EM) may be viewed, and used, as a message passing algorithm in factor graphs.
description: To appear in the proceedings of the 2005 IEEE International Symposium on Information Theory, Adelaide, Australia, September 4-9, 2005
Modulo: Progettazione Europea
Creators: name: Cutroni, Licia
Publisher: name: Zenodo
Year: 2019
Subjects: formazione; progettazione europea

description: Modulo Didattico "Progettazione Europea" presentato all'interno del progetto “SPIDEr” Strategies for Planning and Integrated DEvelopment of urban Cultural Contexts finanziato dalla regione Sicilia, nell’ambito del Programma Operativo Fondo Sociale Europeo (PO FSE Sicilia 2014/2020) in risposta all’Avviso n. 11/2017 “Rafforzare l’occupabilità nel sistema della R&S e la nascita di Spin off di ricerca in Sicilia”
Inter-dimensional Degeneracies in van der Waals Clusters and Quantum Monte Carlo Computation of Rovibrational States
Creators: name: Nightingale, M. P.
name: Moodley, Mervlyn
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: Quantum Monte Carlo estimates of the spectrum of rotationally invariant states of noble gas clusters suggest inter-dimensional degeneracy in $N-1$ and $N+1$ spacial dimensions. We derive this property by mapping the Schrödinger eigenvalue problem onto an eigenvalue equation in which $D$ appears as a continuous variable. We discuss implications for quantum Monte Carlo and dimensional scaling methods.