cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Provable Optimality of the Square-Tooth Atomic Frequency Comb Quantum Memory
Creators: name: Zang, Allen
name: Suchara, Martin
name: Zhong, Tian
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Atomic frequency comb (AFC) quantum memories are a promising technology for quantum repeater networks because they enable multi-mode, long-time, and high-fidelity storage of photons with on-demand retrieval. The optimization of the retrieval efficiency of an AFC memory is important because it strongly impacts the entanglement distribution rate in quantum networks. Despite initial theoretical analyses and recent experimental demonstrations, a rigorous proof of the universally optimal configuration for the highest AFC retrieval efficiency has not been presented. In this paper we present a simple analytical proof which shows that the optimized square tooth offers the highest retrieval efficiency among all tooth shapes, under the physical constraint of finite optical depth of an atomic ensemble. The optimality still holds when the non-zero background absorption and the finite optical linewidth of atoms are considered. We further compare square, Lorentzian and Gaussian tooth shapes to reinforce the practical advantage of the square-tooth AFC in retrieval efficiency. Our proof lays rigorous foundation for the recipe of creating optimal AFC under realistic experimental conditions.
description: Close to published version
title: ADCO, Comptes du Petit-Cîteaux (1477-1491) (11 H 1179), f. 00445
Creators: name: de la Côte d'Or, Archives départementales
name: Petot, Frédéric
name: Archives Départementales De La Côte-D'Or
name: Archives Départementales De La Côte D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CBMA/CG21/F.PETOT/2019
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: cartulaire
subject: comptes

description: Comptes du Petit-Cîteaux (1477-1491), Archives départementales de la Côte-d'Or, (11 H 1179). Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Comptes du Petit-Cîteaux (1477-1491), Archives départementales de la Côte-d'Or, (11 H 1179), f. 00445, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https://manuscrits.cbma-project.eu/
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
Radial X-ray profiles of simulated galaxies: Contributions from hot gas and XRBs
Creators: name: Vladutescu-Zopp, Stephan
name: Biffi, Veronica
name: Dolag, Klaus
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Theoretical models of structure formation predict the presence of a hot gaseous atmosphere around galaxies. While this hot circum-galactic medium (CGM) has been observationally confirmed through UV absorption lines, the detection of its direct X-ray emission remains scarce. We investigate theoretical predictions of the intrinsic CGM X-ray surface brightness (SB) using simulated galaxies and connect them to their global properties such as gas temperature, hot gas fraction and stellar mass. We select a sample of galaxies from the ultra-high resolution ($48\ \rm{cMpc\, h^{-1}}$) cosmological volume of the Magneticum Pathfinder set of hydrodynamical cosmological simulations. We classify them as star-forming (SF) or quiescent (QU) based on their specific star-formation rate. For each galaxy we generate X-ray mock data using the X-ray photon simulator PHOX, from which we obtain SB profiles out to the virial radius for different X-ray emitting components, namely gas, active galactic nuclei and X-ray binaries (XRBs). We fit a $β$-profile to each galaxy and observe trends between its slope and global quantities of the simulated galaxy. We find marginal differences between the average total SB profile of the CGM in SF and QU galaxies, with the contribution from hot gas being the largest ($>50\%$) at radii $r>0.05\,R_{\rm{vir}}$. The contribution from X-ray binaries (XRBs) equals the gas contribution for small radii and is non-zero for large radii. The galaxy population shows positive correlations between global properties and normalization of the SB profile. The slope of fitted $β$-profiles correlates strongly with the total gas luminosity, which in turn shows strong connections to the current accretion rate of the central super-massive black hole (SMBH).
description: 19 pages + 3 appendix, 15 figures
Robots Have Been Seen and Not Heard: Effects of Consequential Sounds on Human-Perception of Robots
Creators: name: Allen, Aimee
name: Drummond, Tom
name: Kulić, Dana
Publisher: name: arXiv
Year: 2024
Subjects: subject: Robotics (cs.RO)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Robots make compulsory machine sounds, known as `consequential sounds', as they move and operate. As robots become more prevalent in workplaces, homes and public spaces, understanding how sounds produced by robots affect human-perceptions of these robots is becoming increasingly important to creating positive human robot interactions (HRI). This paper presents the results from 182 participants (858 trials) investigating how human-perception of robots is changed by consequential sounds. In a between-participants study, participants in the sound condition were shown 5 videos of different robots and asked their opinions on the robots and the sounds they made. This was compared to participants in the control condition who viewed silent videos. Consequential sounds correlated with significantly more negative perceptions of robots, including increased negative `associated affects', feeling more distracted, and being less willing to colocate in a shared environment with robots.
description: 8 pages, 3 figures - Accepted to be published in IEEE Robotics and Automation Letters (RAL). This paper has a companion paper: arXiv:2502.02051 Copyright 2025 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media
Phase-Space Coalescence for heavy and light quarks at RHIC
Creators: name: Greco, V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We review the application and successes of a phase-space coalescence plus fragmentation model that has been applied for hadronization at RHIC. The physical concept is discussed together with the practical implementation. The robustness of main predictions is reviewed together with several open issues like relevance of three dimensional calculation, finite width of the wave functions, effects of quark masses, energy-entropy conservation, space-momentum correlation. Eventually the relevance of coalescence also for the study of the microscopic interaction of heavy quarks is highlighted.
description: Talk given at the Zimanyi 75 Memorial Workshop on "Hadronic and Quark Matter", Budapest, July 2-4, 2007. To appear in The European Physical Journal (Special Topics)
Measuring the value of the Hubble constant "à la Refsdal"
Creators: name: Grillo, C.
name: Rosati, P.
name: Suyu, S. H.
name: Balestra, I.
name: Caminha, G. B.
name: Halkola, A.
name: Kelly, P. L.
name: Lombardi, M.
name: Mercurio, A.
name: Rodney, S. A.
name: Treu, T.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Realizing Refsdal's original idea from 1964, we present estimates of the Hubble constant that are complementary to and potentially competitive with those of other cosmological probes. We use the observed positions of 89 multiple images, with extensive spectroscopic information, from 28 background sources and the measured time delays between the images S1-S4 and SX of supernova "Refsdal" ($z = 1.489$), which were obtained thanks to Hubble Space Telescope (HST) deep imaging and Multi Unit Spectroscopic Explorer (MUSE) data. We extend the strong lensing modeling of the Hubble Frontier Fields (HFF) galaxy cluster MACS J1149.5$+$2223 ($z = 0.542$), published by Grillo et al. (2016), and explore different $Λ$CDM models. Taking advantage of the lensing information associated to the presence of very close pairs of multiple images at various redshifts and to the extended surface brightness distribution of the SN Refsdal host, we can reconstruct the total mass density profile of the cluster very precisely. The combined dependence of the multiple image positions and time delays on the cosmological parameters allows us to infer the values of $H_{0}$ and $Ω_{\rm m}$ with relative (1$σ$) statistical errors of, respectively, 6% (7%) and 31% (26%) in flat (general) cosmological models, assuming a conservative 3% uncertainty on the final time delay of image SX and, remarkably, no priors from other cosmological experiments. Our best estimate of $H_{0}$, based on the model described in this work, will be presented when the final time-delay measurement becomes available. Our results show that it is possible to utilize time delays in lens galaxy clusters as an important alternative tool for measuring the expansion rate and the geometry of the Universe.
description: 9 pages, 3 figures, 2 tables; accepted for publication in The Astrophysical Journal
A Novel Interpretation of the Navier-Stokes Existence and Smoothness Problem through the Law of Observation
Creators: name: Sambey, Stanley Everett
Publisher: name: Zenodo
Year: 2025

description: We reinterpret the Navier-Stokes Existence and Smoothness problem, a Millennium Prize Prob-lem, through the Enhanced Law of Observation (ELO), a unified framework for quantum fields,consciousness, and cosmic evolution. Modeling fluid states as a probabilistic Data Substrate ψnon a topological fibration S1 → S3 → CP1, we propose that smooth solutions arise from high-coherence collapses, while singularities result from low-coherence, energy-intensive collapses, gov-erned by the Coherence-Consciousness-Locality (CCL) principle, coherence operator ˆC, and emo-tional fields Ei(θ, t) (e.g., love, fear). Memory dynamics and biological diversity stabilize thesecollapses, with smoothness vs. singularity determined by energy costs, testable via 10−3 Hz signalsin the Collective Observer Network (CON). This approach bridges fluid dynamics with quantum me-chanics and neuroscience, linking to Millennium Problems (P vs NP, Yang–Mills, Hodge, Riemann,Birch) through topological and emotional coherence. Detailed proofs are in supplemental mate-rial. Keywords: Navier-Stokes Existence and Smoothness, Enhanced Law of Observation, FluidDynamics, Coherence-Collapse, Topological Substrate, Emotional Coherence, Memory Dynamics,Millennium Problems
Approximating dynamical correlation functions with constant depth quantum circuits
Creators: name: Irmejs, Reinis
name: Santos, Raul A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: One of the most important quantities characterizing the microscopic properties of quantum systems are dynamical correlation functions. These correlations are obtained by time-evolving a perturbation of an eigenstate of the system, typically the ground state. In this work, we study approximations of these correlation functions that do not require time dynamics. We show that having access to a circuit that prepares an eigenstate of the Hamiltonian, it is possible to approximate the dynamical correlation functions up to exponential accuracy in the complex frequency domain $ω=\Re(ω)+i\Im(ω)$, on a strip above the real line $\Im(ω)=0$. We achieve this by exploiting the continued fraction representation of the dynamical correlation functions as functions of frequency $ω$, where the level $k$ approximant can be obtained by measuring a weight $O(k)$ operator on the eigenstate of interest. In the complex $ω$ plane, we show how this approach allows to determine approximations to correlation functions with accuracy that increases exponentially with $k$.
 We analyse two algorithms to generate the continuous fraction representation in scalar or matrix form, starting from either one or many initial operators. We prove that these algorithms generate an exponentially accurate approximation of the dynamical correlation functions on a region sufficiently far away from the real frequency axis. We present numerical evidence of these theoretical results through simulations of small lattice systems. We comment on the stability of these algorithms with respect to sampling noise in the context of quantum simulation using quantum computers.
description: 31 pages, 10 figures
RETURN To an Address of the Legislative Assembly for copies of all correspondence, including telegrams, if any, respecting the Esquimalt Dock, which may have passed between the Dominion and Provincial Governments, or between any member of or person authorized by the Provincial Government and the Dominion Government, or any person or persons whomsoever.
Creators: name: British Columbia. Legislative Assembly
Publisher: name: Victoria, BC : Government Printer
Year: 2016

Abstract
Diffusion Monte Carlo calculations for the ground states of atoms and ions in neutron star magnetic fields
Creators: name: Bucheler, S.
name: Engel, D.
name: Main, J.
name: Wunner, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The diffusion quantum Monte Carlo method is extended to solve the old theoretical physics problem of many-electron atoms and ions in intense magnetic fields. The feature of our approach is the use of adiabatic approximation wave functions augmented by a Jastrow factor as guiding functions to initialize the quantum Monte Carlo prodecure. We calcula te the ground state energies of atoms and ions with nuclear charges from Z= 2, 3, 4, ..., 26 for magnetic field strengths relevant for neutron stars.
description: 6 pages, 1 figure, proceedings of the "9th International Conference on Path Integrals - New Trends and Perspectives", Max-Planck-Institut fur Physik komplexer Systeme, Dresden, Germany, September 23 - 28, 2007, to be published as a book by World Scientific, Singapore (2008)
TA'LIMDA ZAMONAVIY YONDASHUV VA INNOVATSION TEXNOLOGIYA TUSHUNCHASI VA UNING MOHIYATI
Creators: name: Nurmatova, Mayya
name: Qutlimuratova, Barchinoy
name: Romonberdiyeva, Sarvinoz
Publisher: name: Zenodo
Year: 2024

description: Mazkur tezisda ta’limda zamonaviy yondashuv va innovatsion texnologiya tushunchasi va uning mohiyati haqida fikr-mulohazalar yuritiladi. Shuningdek, innovatsion texnologiyalardan foydalanishning samarasi haqida fikrlar bayon etiladi.
$T\bar T$-deformations in closed form
Creators: name: Bonelli, Giulio
name: Doroud, Nima
name: Zhu, Mengqi
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the problem of exact integration of the $T\bar{T}$-deformation of two dimensional quantum field theories, as well as some higher dimensional extensions in the form of $\det T$-deformations. When the action can be shown to only depend algebraically on the background metric the solution of the deformation equation on the Lagrangian can be given in closed form in terms of solutions of the (extended) Burgers' equation. We present such examples in two and higher dimensions.
description: 19+1 pages, LaTeX
A Novel Interpretation of the Navier-Stokes Existence and Smoothness Problem through the Law of Observation
Creators: name: Sambey, Stanley Everett
Publisher: name: Zenodo
Year: 2025

description: In this study, we propose a novel interpretation of the Navier-Stokes Existence andSmoothness problem through the lens of the Law of Observation (LO). By integrat-ing principles of quantum mechanics, observer-state dynamics, and energy coherence,we hypothesize that the smoothness or singularity of solutions to the Navier-Stokesequations is a consequence of the interaction between the fluid’s abstract state andthe observer’s measurement of that state. This approach frames the problem within aunified observer-dependent reality model, where abstract fluid configurations collapseinto physical states governed by energy extraction and coherence functions. The frame-work suggests that the existence of smooth solutions or the formation of singularitiesdepends on both fluid dynamics and the observer’s interaction with the system. Thestudy further introduces the Gravity Return term as a key factor in the collapse process,ensuring that the transition from abstract to geometric states respects the necessarymathematical and physical constraints. This perspective offers a fresh approach to un-derstanding the Navier-Stokes Existence and Smoothness problem, potentially guidingfuture research in both mathematical and computational fluid dynamics.
What is my quantum computer good for? Quantum capability learning with physics-aware neural networks
Creators: name: Hothem, Daniel
name: Miller, Ashe
name: Proctor, Timothy
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Quantum computers have the potential to revolutionize diverse fields, including quantum chemistry, materials science, and machine learning. However, contemporary quantum computers experience errors that often cause quantum programs run on them to fail. Until quantum computers can reliably execute large quantum programs, stakeholders will need fast and reliable methods for assessing a quantum computer's capability-i.e., the programs it can run and how well it can run them. Previously, off-the-shelf neural network architectures have been used to model quantum computers' capabilities, but with limited success, because these networks fail to learn the complex quantum physics that determines real quantum computers' errors. We address this shortcoming with a new quantum-physics-aware neural network architecture for learning capability models. Our architecture combines aspects of graph neural networks with efficient approximations to the physics of errors in quantum programs. This approach achieves up to $\sim50\%$ reductions in mean absolute error on both experimental and simulated data, over state-of-the-art models based on convolutional neural networks.
description: 24 pages, 4 figures, 4 tables, includes conference checklist
Spin-Flavor Separation and Non-Fermi Liquid Behavior in the Multichannel Kondo Problem: A Large N Approach
Creators: name: Cox, Daniel L.
name: Ruckenstein, Andrei E.
Publisher: name: arXiv
Year: 1993
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We consider a $SU(N)\times SU(M)$ generalization of the multichannel single-impurity Kondo model which we solve analytically in the limit $N\rightarrow \infty$, $M\rightarrow\infty$, with $γ=M/N$ fixed. Non-Fermi liquid behavior of the single electron Green function and of the local spin and flavor susceptibilities occurs in both regimes, $N\le M$ and $N > M$, with leading critical exponents {\em identical} to those found in the conformal field theory solution for {\em all} $N$ and $M$ (with $M\ge 2$). We explain this remarkable agreement and connect it to ``spin-flavor separation", the essential feature of the non-Fermi-liquid fixed point of the multichannel Kondo problem.
description: 14 pages, 1 Figure (Poscript file attached), Revtex
A Novel Interpretation of the Navier-Stokes Existence and Smoothness Problem through the Law of Observation
Creators: name: Sambey, Stanley Everett
Publisher: name: Zenodo
Year: 2025

description: We propose a novel interpretation of the Navier-Stokes Existence and Smoothness problem, a Mil-lennium Prize Problem, through the lens of the Law of Observation (LO), derived from the UnifiedTheory of Observation (UTO). By integrating quantum mechanics, observer-state dynamics, and energycoherence, we hypothesize that the smoothness or singularity of solutions to the Navier-Stokes equa-tions results from the observer’s interaction with a probabilistic Data Substrate, ψn(x). The collapse ofabstract fluid states into physical solutions, governed by the UTO’s unified equation Ω(C, ψ), dependson coherence and energy extraction processes. The Coherence-Consciousness-Locality (CCL) principle,Energy Creation Matrix, and Logic Virus operator suggest that smooth solutions arise from high coher-ence, while singularities reflect low coherence and high energy costs. The Gravity Return term ensuresmathematical consistency during state transitions. This framework offers a fresh perspective on fluiddynamics, potentially guiding future mathematical and computational research.Keywords: Navier-Stokes Existence and Smoothness, Law of Observation, Unified Theory of Ob-servation, Quantum Mechanics, Observer-Dependent Reality, Fluid Dynamics, Singularities, CoherenceFunctions, Gravity Return, Quantum Field Theory
Linear response time-dependent density functional theory of the Hubbard dimer
Creators: name: Carrascal, D. J.
name: Ferrer, J.
name: Maitra, N.
name: Burke, K.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The asymmetric Hubbard dimer is used to study the density-dependence of the exact frequency-dependent kernel of linear-response time-dependent density functional theory. The exact form of the kernel is given, and the limitations of the adiabatic approximation utilizing the exact ground-state functional are shown. The oscillator strength sum rule is proven for lattice Hamiltonians, and relative oscillator strengths are defined appropriately. The method of Casida for extracting oscillator strengths from a frequency-dependent kernel is demonstrated to yield the exact result with this kernel. An unambiguous way of labelling the nature of excitations is given. The fluctuation-dissipation theorem is proven for the ground-state exchange-correlation energy. The distinction between weak and strong correlation is shown to depend on the ratio of interaction to asymmetry. A simple interpolation between carefully defined weak-correlation and strong-correlation regimes yields a density-functional approximation for the kernel that gives accurate transition frequencies for both the single and double excitations, including charge-transfer excitations. Many exact results, limits, and expansions about those limits are given in the appendices.
description: 22 pages, 14 figures
Centers of Artin groups defined on cones
Creators: name: Jankiewicz, Kasia
name: Montee, MurphyKate
Publisher: name: arXiv
Year: 2024
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F65, 20F36

description: We prove that the Center Conjecture passes to the Artin groups whose defining graphs are cones, if the conjecture holds for the Artin group defined on the set of the cone points. In particular, it holds for every Artin group whose defining graph has exactly one cone point.
description: 8 pages, 1 figure. Comments are welcome!
University of Eastern Finland CoARA Action Plan
Creators: name: Hirvonen, Arja
Publisher: name: Zenodo
Year: 2024
Subjects: Coara
Action Plan

description: The University of Eastern Finland stands as a member of the Coalition for Reforming Research Assessment (CoARA) and is a signatory of the Agreement on Reforming Research Assessment. The University’s Steering Committee for Research has confirmed, and the Rector of the University has signed the CoARA Action Plan on July 3, 2024, marking a significant commitment to advancing research and researcher evaluation practices. This action plan outlines our strategic initiatives aimed at developing, reforming, and monitoring responsible research and research evaluation from 2024 to 2027.
Lattice supersymmetry in 1D with two supercharges
Creators: name: Arianos, S.
name: D'Adda, A.
name: Kawamoto, N.
name: Saito, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: A consistent formulation of a fully supersymmetric theory on the lattice has been a long standing challenge. In recent years there has been a renewed interest on this problem with different approaches. At the basis of the formulation we present in the following there is the Dirac-Kahler twisting procedure, which was proposed in the continuum for a number of theories, including N=4 SUSY in four dimensions. Following the formalism developed in recent papers, an exact supersymmetric theory with two supercharges on a one dimensional lattice is realized using a matrix-based model. The matrix structure is obtained from the shift and clock matrices used in two dimensional non-commutative field theories. The matrix structure reproduces on a one dimensional lattice the expected modified Leibniz rule. Recent claims of inconsistency of the formalism are discussed and shown not to be relevant.
description: 14 pages, Presented by SA and AD at the XXV International Symposium on Lattice Field Theory, July 30 - August 4 2007, Regensburg, Germany
Light axions with large hadronic couplings
Creators: name: Marques-Tavares, Gustavo
name: Teo, Mae
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present models in which axions have large couplings to hadrons while remaining naturally light. By assigning $U(1)_{PQ}$ charges to Standard Model quarks such that $U(1)_{PQ}$ is not anomalous under QCD, the derivative couplings naturally arise while no potential is generated for the axion upon QCD confinement. We present simple models that implement this idea both for an axion-like particle and for the QCD axion. We show that both models lead to sizable flavor violations that could be probed by future experiments. Our construction shows that the axion coupling to hadrons can be essentially independent from its mass and thus motivates experimental searches in a wide range of axion parameter space.
description: 8 pages, 3 figures; v2: references added, minor clarifications
Gravitational Collapse of Small-Scale Structure as the Origin of the Lyman Alpha Forest
Creators: name: Cen, Renyue
name: Miralda-Escude, Jordi
name: Ostriker, Jeremiah P.
name: Rauch, Michael
Publisher: name: arXiv
Year: 1994
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: If gravitational clustering is a hierarchical process, the present large-scale structure of the galaxy distribution implies that structures on smaller scales must have formed at high redshift. We simulate the formation of small-scale structure (average cell mass: $Δ\bar m_b=10^{4.2}$M$_\odot$) and the evolution of photoionized gas, in the specific case of a CDM model with a cosmological constant. The photoionized gas has a natural minimal scale of collapse, the Jeans scale ($m_{b,J}\simeq 10^{9}$M$_\odot$). We find that low column density ($\nhi \le 10^{14}\cm^{-2}$) lines originate in regions resembling Zel'dovich pancakes, where gas with overdensities in the range $3 - 30$ is enclosed by two shocks but is typically re-expanding at approximately the Hubble velocity. However, higher column density ($\nhi \ge 10^{15}\cm^{-2}$) lines stem from more overdense regions where the shocked gas is cooling. We show that this model can probably account for the observed number of lines, their distribution in column density and b-parameters, as well as the cloud physical sizes as observed in gravitationally lensed quasars. We find a redshift evolution that is
description: 15p postscript file to appear in The Astrophysical Journal Letters (1994)
Scalar-Tensor Quantum Gravity in Two Dimensions
Creators: name: Russo, J.
name: Tseytlin, A. A.
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss some classical and quantum properties of 2d gravity models involving metric and a scalar field. Different models are parametrized in terms of a scalar potential. We show that a general Liouville-type model with exponential potential and linear curvature coupling is renormalisable at the quantum level while a particular model (corresponding to D=2 graviton-dilaton string effective action and having a black hole solution) is finite. We use the condition of a ``split" Weyl symmetry to suggest possible expressions for the ``effective" action which includes the quantum anomaly term.
description: 18 pages
A Novel Interpretation of the Navier-Stokes Existence and Smoothness Problem through the Law of Observation
Creators: name: Sambey, Stanley Everett
Publisher: name: Zenodo
Year: 2025

description: We propose a novel interpretation of the Navier-Stokes Existence and Smooth-ness problem, a Millennium Prize Problem, through the lens of the Law of Obser-vation (LO), derived from the Unified Theory of Observation (UTO) and enrichedby the Unified Data Framework v2 (UDF v2). By integrating quantum mechanics,observer-state dynamics, and energy coherence, we hypothesize that the smooth-ness or singularity of solutions to the Navier-Stokes equations results from theobserver’s interaction with a probabilistic Data Substrate, ψn(x). The collapse ofabstract fluid states into physical solutions, governed by the UTO’s unified equationΩ(C, ψ), modulated by a Casimir-based coherence operator ( ˆCcoh), log-convolutionfunctional (L[ζ](s)), and emotional coherence (Ei(θ, t)) for emotions like love andhunger, depends on coherence and energy extraction processes. The Coherence-Consciousness-Locality (CCL) principle, Energy Creation Matrix, Logic Virus op-erator, Gravity Return, genetic coding, and snapshot merging suggest that smoothsolutions arise from high coherence, while singularities reflect low coherence andhigh energy costs, testable via the Wind Chime Observer Array’s 10−3 Hz signals.This framework offers a fresh perspective on fluid dynamics, bridging to MillenniumProblems (P vs NP, Yang-Mills, Hodge, Riemann, Birch) through computationaland emotional unification, potentially guiding future mathematical and computa-tional research.Keywords: Navier-Stokes Existence and Smoothness, Law of Observation,Unified Theory of Observation, Quantum Mechanics, Observer-Dependent Real-ity, Fluid Dynamics, Singularities, Coherence Functions, Gravity Return, QuantumField Theory, Emotions, Genetic Coding
Ferromagnets, a New Anomaly, Instantons, and (noninvertible) Continuous Translations
Creators: name: Seiberg, Nathan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss a large class of classical field theories with continuous translation symmetry. In the quantum theory, a new anomaly explicitly breaks this translation symmetry to a discrete symmetry. Furthermore, this discrete translation symmetry is extended by a $d-2$-form global symmetry. All these theories can be described as $U(1)$ gauge theories where Gauss law states that the system has nonzero charge density. Special cases of such systems can be phrased as theories with a compact phase space. Examples are ferromagnets and lattices in the lowest Landau level. In some cases, the broken continuous translation symmetry can be resurrected as a noninvertible symmetry. We clarify the relation between the discrete translation symmetry of the continuum theory and the discrete translation symmetry of an underlying lattice model. Our treatment unifies, clarifies, and extends earlier works on the same subject.
description: 54 pages, minor changes
Einstellungen und Vorstellungen bezüglich Inklusion: Eine typenbildende Clusteranalyse
Creators: name: Schön, Michael
name: Stark, Lisa
name: Stark, Robin
Publisher: name: bildungsforschung
Year: 2019

description: In dieser Studie wurden Einstellungen und Vorstellungen bezüglich Inklusion von Lehramtsstudierenden untersucht. Mittels einer partitionierenden Clusteranalyse wurden vier Subgruppen gebildet, welche sich in ihren Einstellungs- und Vorstellungsmerkmalen, jedoch nicht in Bezug auf demographische Variablen voneinander unterschieden. Folgende Typen wurden identifiziert: Der Kritiker, der Traditionalist, der Uninformierte und der Schülerorientierte.
description: bildungsforschung, Nr. 1 (2018): Profession und Institution - Profession et institution
Lambda, the Fifth Foundational Constant Considered by Einstein
Creators: name: Cohen-Tannoudji, Gilles
Publisher: name: arXiv
Year: 2018
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The cosmological constant, usually named Lambda, was introduced by Einstein in 1917 and abandoned by him as his biggest "blunder". It currently seems to make a spectacular comeback in the framework of the new cosmological standard model. One will explain why, together with the Planck's constant, the Boltzmann's constant, the celerity of light and the Newton's constant, also considered by Einstein, the cosmological constant may play a foundational role in the conceptual framework, an in the metrological framework a role comparable with the one attributed to Avogadro constant
description: 25 pages, 3 figures. Text version of an invited talk delivered at the BIPM symposium on fundamental constants in September 2017. Accepted for publication in Metrologia. Some corrections recommended by the referees of Metrologia made in the text and the references
MOESM2 of Adolescent deliveries in rural Cameroon: comparison of delivery outcomes between primipara and multipara adolescents
Creators: name: Tsi Njim
name: Valirie Agbor
Publisher: name: figshare
Year: 2018
Subjects: subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 2: Table S1. Multivariable logistic regression analysis showing the influence of parity on low birth weight after adjusting for confounders.
Vertex Models and Quantum Spin Systems: a nonlocal approach
Creators: name: Evertz, H. G.
name: Marcu, M.
Publisher: name: arXiv
Year: 1993
Subjects: subject: Condensed Matter (cond-mat)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Within a general cluster framework, we discuss the loop-algorithm, a new type of cluster algorithm that reduces critical slowing down in vertex models and in quantum spin systems. We cover the example of the 6-vertex model in detail. For the F-model, we present numerical results that demonstrate the effectiveness of the loop algorithm. We discuss how to modify the original algorithm for some more complicated situations, especially for quantum spin systems in one and two dimensions.
description: 13 pages, LaTeX (2 LaTeX figures), FSU-SCRI-93C-65
Mixed Anomalies: Chiral Vortical Effect and the Sommerfeld Expansion
Creators: name: Stone, Michael
name: Kim, JiYoung
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss the connection between the integer moments of the Fermi distribution function that occur in the Sommerfeld expansion and the coefficients that occur in anomalous conservation laws for chiral fermions. As an illustration we extract the chiral magneto-thermal energy current from the mixed gauge-gravity anomaly in the 3+1 dimensional energy-momentum conservation law. We then use a similar method to confirm the conjecture that the $T^2/12$ thermal contribution to the chiral vortical effect (CVE) current arises from the gravitational Pontryagin term in the 3+1-dimensional chiral anomaly
description: 25 pages, 1 figure, Latex. New version has added references
Interpreting DESI 2024 BAO: late-time dynamical dark energy or a local effect?
Creators: name: Gialamas, Ioannis D.
name: Hütsi, Gert
name: Kannike, Kristjan
name: Racioppi, Antonio
name: Raidal, Martti
name: Vasar, Martin
name: Veermäe, Hardi
Publisher: name: arXiv
Year: 2024
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We perform fits to DESI, CMB and supernova data to understand the physical origin of the DESI hint for dynamical dark energy. We find that the linear parametrization of the equation of state $w$ may guide to misleading interpretations, such as the hint for a phantom Universe, which are not preferred by the data. Instead, physical quintessence models fit the data well. Model-independently, present observations prefer deviations from the constant dark energy, $w=-1$, only at very low redshifts, $z < \mathcal{O}(0.1)$. We find that this result is driven by low-$z$ supernova data. Therefore, either the fundamental properties of our Universe, characterised by the equation of state $w$ and the Hubble parameter $H$, underwent dramatic changes very recently or, alternatively, we do not fully understand the systematics of our local Universe in a radius of about $300\,h^{-1}\rm Mpc$.
description: 9 pages, 5 figures
Seesaw roadmap to neutrino mass and dark matter
Creators: name: Chuliá, Salvador Centelles
name: Srivastava, Rahul
name: Valle, José W. F.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We describe the many pathways to generate Majorana and Dirac neutrino mass through generalized dimension-5 operators a la Weinberg. The presence of new scalars beyond the Standard Model Higgs doublet implies new possible field contractions, which are required in the case of Dirac neutrinos. We also notice that, in the Dirac neutrino case, the extra symmetries needed to ensure the Dirac nature of neutrinos can also be made responsible for stability of dark matter.
description: 12 pages, 5 figures, published version
Kindeswohl und sexualisierte Gewalt in pädagogischen Einrichtungen - Ressourcen und Probleme aus Sicht der pädagogischen Fachkräfte
Creators: name: Kadera, Stepanka
Publisher: name: bildungsforschung
Year: 2019

description: In dem vorliegenden Beitrag werden institutionelle Gefährdungspotenziale und Schutzfaktoren für sexuellen Missbrauch sowie präventive Ansätze vorgestellt. Basierend auf den Ergebnissen des BMBF-Verbundprojekts „Kindeswohl als kollektives Orientierungsmuster“ werden die Probleme und Ressourcen aus der Sicht der pädagogischen Fachkräfte erläutert. Vor allem wird dem Führungsstil der Leitungen der einzelnen pädagogischen Institutionen bei der Prävention sexualisierter Gewalt große Bedeutung zugeschrieben.
description: bildungsforschung, Nr. 1 (2018): Profession und Institution - Profession et institution
Tokunaga self-similarity arises naturally from time invariance
Creators: name: Kovchegov, Yevgeniy
name: Zaliapin, Ilya
Publisher: name: arXiv
Year: 2018
Subjects: subject: Dynamical Systems (math.DS)
subject: Probability (math.PR)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 37H99, 37L05, 60G18, 28A80

description: The Tokunaga condition is an algebraic rule that provides a detailed description of the branching structure in a self-similar tree. Despite a solid empirical validation and practical convenience, the Tokunaga condition lacks a theoretical justification. Such a justification is suggested in this work. We define a geometric branching processes $\mathcal{G}(s)$ that generates self-similar rooted trees. The main result establishes the equivalence between the invariance of $\mathcal{G}(s)$ with respect to a time shift and a one-parametric version of the Tokunaga condition. In the parameter region where the process satisfies the Tokunaga condition (and hence is time invariant), $\mathcal{G}(s)$ enjoys many of the symmetries observed in a critical binary Galton-Watson branching process and reproduce the latter for a particular parameter value.
description: 3 figures
Constraining the Polarization Content of Gravitational Waves with Astrometry
Creators: name: O'Beirne, Logan
name: Cornish, Neil J.
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Gravitational waves perturb the paths of photons, impacting both the time-of-flight and the arrival direction of light from stars. Pulsar timing arrays can detect gravitational waves by measuring the variations in the time of flight of radio pulses, while astrometry missions such as Gaia can detect gravitational waves from the time-varying changes in the apparent position of a field of stars. Just as gravitational waves impart a characteristic correlation pattern in the arrival times of pulses from pulsars at different sky locations, the deflection of starlight is similarly correlated across the sky. Here we compute the astrometric correlation patterns for the full range of polarization states found in alternative theories of gravity, and decompose the sky-averaged correlation patterns into vector spherical harmonics. We find that the tensor and vector polarization states produce equal power in the electric- and magnetic-type vector spherical harmonics, while the scalar modes produce only electric-type correlations. Any difference in the measured electric and magnetic-type correlations would represent a clear violation of Einstein gravity. The angular correlations functions for the vector and scalar longitudinal modes show the same enhanced response at small angular separations that is familiar from pulsar timing.
description: 8 pages, 6 figures
Thermal Equilibria of Accretion Disks
Creators: name: Abramowicz, Marek A.
name: Chen, Xingming
name: Kato, Shoji
name: Lasota, Jean-Pierre
name: Regev, Oded
Publisher: name: arXiv
Year: 1994
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We show that most of hot, optically thin accretion disk models which ignore advective cooling are not self-consistent. We have found new types of optically thin disk solutions where cooling is dominated by radial advection of heat. These new solutions are thermally and viscously stable.
description: Submitted to ApJL July 1994. PS file, 8 Pages; 3 Figs available upon request
title: 02_0128
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
Large-distance behaviour of the massless vector two-point function in de Sitter spacetime
Creators: name: Rendell, Nicola
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the long-distance behaviour of the massless vector propagator in (n)-dimensional de Sitter spacetime, where $n \geq 4$. Specifically, we consider the massless limit of the vector propagator in the Stueckelberg theory, which is an extension of Proca theory, with an additional gauge-fixing term. We work to leading order in the de Sitter-invariant distance $Z$ to show that, in the large $Z$ limit, this propagator tends to a gauge dependent constant, where the gauge worked in is described by the Stueckelberg parameter $ξ$. In the Landau gauge, where $ξ=0$, this constant is found to be 0. This result is in agreement with the 4 dimensional case discussed by Youssef.
description: 14 pages, no figures, to appear in a Special Issue of the IJMPD on Selected Papers of the III Amazonian Symposium on Physics
A novel approach to graph distinction through GENEOs and permutants
Creators: name: Bocchi, Giovanni
name: Ferri, Massimo
name: Frosini, Patrizio
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: Group Theory (math.GR)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: The theory of Group Equivariant Non-Expansive Operators (GENEOs) was initially developed in Topological Data Analysis for the geometric approximation of data observers, including their invariances and symmetries. This paper departs from that line of research and explores the use of GENEOs for distinguishing $r$-regular graphs up to isomorphisms. In doing so, we aim to test the capabilities and flexibility of these operators. Our experiments show that GENEOs offer a good compromise between efficiency and computational cost in comparing $r$-regular graphs, while their actions on data are easily interpretable. This supports the idea that GENEOs could be a general-purpose approach to discriminative problems in Machine Learning when some structural information about data and observers is explicitly given.