cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Hilbert space shattering and disorder-free localization in polar lattice gases
Creators: name: Li, Wei-Han
name: Deng, Xiaolong
name: Santos, Luis
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Emerging dynamical constraints resulting from inter-site interactions severely limit particle mobility in polar lattice gases. Whereas in absence of disorder hard-core Hubbard models with only strong nearest-neighbor interactions present Hilbert space fragmentation but no many-body localization for typical states, the $1/r^3$ tail of the dipolar interaction results in Hilbert space shattering, as well as in a dramatically slowed down dynamics and eventual disorder-free localization. Our results show that the study of the intriguing interplay between disorder- and interaction-induced many-body localization is within reach of future experiments with magnetic atoms and polar molecules.
description: 6 pages, 4 figures
New exact solutions on the Randall-Sundrum 2-brane: lumps of dark radiation and accelerated black holes
Creators: name: Anber, Mohamed
name: Sorbo, Lorenzo
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We provide the most general embedding of a purely tensional 2-brane in a 3+1 dimensional bulk described by the AdS C-metric. The AdS C-metric has been first considered as bulk metric by Emparan, Horowitz and Myers (hep-th/9911043 and hep-th/9912135), who have found metrics describing a brane localized black hole. In those papers, one of the parameters of the bulk C-metric was fine-tuned to the brane tension. We relax this fine tuning and we find two new classes of solutions, the first describing a time dependent, rotationally symmetric metric, the second describing accelerated black holes on the brane. This is the first exact solution on the brane describing two objects in interaction. We discuss the qualitative CFT interpretation of these solutions.
description: 20 pages, 4 figures; fixed one incorrect statement along with other minor modifications, references added, version published on JHEP
Density functional theory of vortex lattice melting in layered superconductors: a mean-field--substrate approach
Creators: name: De Col, A.
name: Menon, G. I.
name: Blatter, G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the melting of the pancake vortex lattice in a layered superconductor in the limit of vanishing Josephson coupling. Our approach combines the methodology of a recently proposed mean-field substrate model for such systems with the classical density functional theory of freezing. We derive a free-energy functional in terms of a scalar order-parameter profile and use it to derive a simple formula describing the temperature dependence of the melting field. Our theoretical predictions are in good agreement with simulation data. The theoretical framework proposed is thermodynamically consistent and thus capable of describing the negative magnetization jump obtained in experiments. Such consistency is demonstrated by showing the equivalence of our expression for the density discontinuity at the transition with the corresponding Clausius-Clapeyron relation.
description: 11 pages, 4 figures
Dynamical Fragile Topology in Floquet Crystals
Creators: name: Yu, Jiabin
name: Ge, Yang
name: Sarma, Sankar Das
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Although fragile topology has been intensely studied in static crystals in terms of Wannier obstruction, it is not clear how to generalize the concept to dynamical systems. In this work, we generalize the concept of fragile topology, and provide a definition of fragile topology for noninteracting Floquet crystals, which we refer to as dynamical fragile topology. In contrast to the static fragile topology defined by Wannier obstruction, dynamical fragile topology is defined for the nontrivial quantum dynamics characterized by the obstruction to static limits (OTSL). Specifically, the OTSL of a Floquet crystal is fragile if and only if it disappears after adding a symmetry-preserving static Hamiltonian in a direct-sum way preserving the relevant gaps (RGs). We further present a concrete 2+1D example for dynamical fragile topology, based on a model that is qualitatively the same as the dynamical model with anomalous chiral edge modes in [Rudner et al., Phys. Rev. X 3, 031005 (2013)]. The fragile OTSL in the 2+1D example exhibits anomalous chiral edge modes for a natural open boundary condition, and does not require any crystalline symmetries besides lattice translations. Our work paves the way to study fragile topology for general quantum dynamics.
description: Close to the published version
Energy Levels of Odd-Odd nuclei Using Broken Pair Model
Creators: name: Hamammu, I. M.
name: Haq, S.
name: Eldahomi, J. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Simple methods in the frame work of the broken pair model have been worked out for odd-odd nuclei. The reliability of the model has been tested by reproducing the shell model results of limiting cases in which the broken pair model exactly coincides with the shell model. The model is then applied to calculate the energy levels of some nuclei in the Zirconium region. The model results compare reasonably well with the shell model as well as with the experimental data.
Fidelity analysis of topological quantum phase transitions
Creators: name: Abasto, Damian F.
name: Hamma, Alioscia
name: Zanardi, Paolo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We apply the fidelity metric approach to analyze two recently introduced models that exhibit a quantum phase transition to a topologically ordered phase. These quantum models have a known connection to classical statistical mechanical models; we exploit this mapping to obtain the scaling of the fidelity metric tensor near criticality. The topological phase transitions manifest themselves in divergences of the fidelity metric across the phase boundaries. These results provide evidence that the fidelity approach is a valuable tool to investigate novel phases lacking a clear characterization in terms of local order parameters.
description: 4 pages
Nucleon form-factors of the energy momentum tensor in the chiral quark-soliton model
Creators: name: Goeke, K.
name: Grabis, J.
name: Ossmann, J.
name: Polyakov, M. V.
name: Schweitzer, P.
name: Silva, A.
name: Urbano, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The nucleon form factors of the energy-momentum tensor are studied in the large-Nc limit in the framework of the chiral quark-soliton model.
description: 26 pages, 9 figures
Normalization of Collisional Decoherence: Squaring the Delta Function, and an Independent Cross-Check
Creators: name: Adler, Stephen L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We show that when the Hornberger--Sipe calculation of collisional decoherence is carried out with the squared delta function a delta of energy instead of a delta of the absolute value of momentum, following a method introduced by Diósi, the corrected formula for the decoherence rate is simply obtained. The results of Hornberger and Sipe and of Diósi are shown to be in agreement. As an independent cross-check, we calculate the mean squared coordinate diffusion of a hard sphere implied by the corrected decoherence master equation, and show that it agrees precisely with the same quantity as calculated by a classical Brownian motion analysis.
description: Tex: 14 pages 7/30/06: revisions to introduction, and references added 9/29/06: further minor revisions and references added
Explanations in Autonomous Driving: A Survey
Creators: name: Omeiza, Daniel
name: Webb, Helena
name: Jirotka, Marina
name: Kunze, Lars
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Artificial Intelligence (cs.AI)
subject: Computers and Society (cs.CY)
subject: Machine Learning (cs.LG)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: The automotive industry has witnessed an increasing level of development in the past decades; from manufacturing manually operated vehicles to manufacturing vehicles with a high level of automation. With the recent developments in Artificial Intelligence (AI), automotive companies now employ blackbox AI models to enable vehicles to perceive their environments and make driving decisions with little or no input from a human. With the hope to deploy autonomous vehicles (AV) on a commercial scale, the acceptance of AV by society becomes paramount and may largely depend on their degree of transparency, trustworthiness, and compliance with regulations. The assessment of the compliance of AVs to these acceptance requirements can be facilitated through the provision of explanations for AVs' behaviour. Explainability is therefore seen as an important requirement for AVs. AVs should be able to explain what they have 'seen', done, and might do in environments in which they operate. In this paper, we provide a comprehensive survey of the existing body of work around explainable autonomous driving. First, we open with a motivation for explanations by highlighting and emphasising the importance of transparency, accountability, and trust in AVs; and examining existing regulations and standards related to AVs. Second, we identify and categorise the different stakeholders involved in the development, use, and regulation of AVs and elicit their explanation requirements for AV. Third, we provide a rigorous review of previous work on explanations for the different AV operations (i.e., perception, localisation, planning, control, and system management). Finally, we identify pertinent challenges and provide recommendations, such as a conceptual framework for AV explainability. This survey aims to provide the fundamental knowledge required of researchers who are interested in explainability in AVs.
description: Accepted for publication in IEEE Transactions on Intelligent Transportation Systems
SUN-to-LIQUID II project initial press release
Creators: name: SANTI, Sofia
name: Sizmann, Andreas
Publisher: name: Zenodo
Year: 2024
Subjects: transportation
Renewable energy sources
aviation
emission reduction
hydrocarbons
SAF
sustainable fuel
solar fuel
renewable fuel of nonbiological origin
sunlight-to-liquid
concentrated solar energy
heat recovery

description: The initial SUN-to-LIQUID II project press release was published in December 2023.
Extreme matter compression caused by radiation cooling effect in gigabar shock wave driven by laser-accelerated fast electrons
Creators: name: Gus'kov, S. Yu.
name: Kuchugov, P. A.
name: Vergunova, G. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Heating a solid with laser-accelerated fast electrons is unique way for a laboratory experiment to generate a plane powerful shock wave with a pressure of several hundred or even thousands of Mbar. Behind the front of such a powerful shock wave, dense plasma is heated to a temperature of several keV. Then, a high rate of radiation energy loss occurs even in low-$Z$ plasmas. The effect of strong compression of matter due to radiation cooling in a gigabar shock wave driven by fast electrons is found in computational and theoretical researches. It is shown that the effect of radiation cooling leads to the compression of matter in the peripheral region of shock wave to a density several times larger than the density at its front. Heating a solid by a petawatt flux of laser-accelerated fast electrons allows one to surpass the gigabar pressure level of a plane shock wave, which is the maximum level for the impact of laser-accelerated pellets. Higher pressure about 100 Gbar can be achieved under laboratory conditions only when a spherical target is imploded under the action of a terawatt laser pulse.
Collisional Ionization Equilibrium for Optically Thin Plasmas. I. Updated Recombination Rate Coefficients for Bare though Sodium-like Ions
Creators: name: Bryans, P.
name: Badnell, N. R.
name: Gorczyca, T. W.
name: Laming, J. M.
name: Mitthumsiri, W.
name: Savin, D. W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Reliably interpreting spectra from electron-ionized cosmic plasmas requires accurate ionization balance calculations for the plasma in question. However, much of the atomic data needed for these calculations have not been generated using modern theoretical methods and are often highly suspect. This translates directly into the reliability of the collisional ionization equilibrium (CIE) calculations. We make use of state-of-the-art calculations of dielectronic recombination (DR) rate coefficients for the hydrogenic through Na-like ions of all elements from He up to and including Zn. We also make use of state-of-the-art radiative recombination (RR) rate coefficient calculations for the bare through Na-like ions of all elements from H through to Zn. Here we present improved CIE calculations for temperatures from $10^4$ to $10^9$ K using our data and the recommended electron impact ionization data of \citet{Mazz98a} for elements up to and including Ni and Mazzotta (private communication) for Cu and Zn. DR and RR data for ionization stages that have not been updated are also taken from these two additional sources. We compare our calculated fractional ionic abundances using these data with those presented by Mazzotta et al. for all elements from H to Ni. The differences in peak fractional abundance are up to 60%. We also compare with the fractional ionic abundances for Mg, Si, S, Ar, Ca, Fe, and Ni derived from the modern DR calculations of \citet{Gu03a,Gu04a} for the H-like through Na-like ions, and the RR calculations of \citet{Gu03b} for the bare through F-like ions. These results are in better agreement with our work, with differences in peak fractional abundance of less than 10%.
description: 83 pages, 38 figures, 41 tables Accepted to ApJS
Probing Dark Energy with Baryonic Acoustic Oscillations at High Redshifts
Creators: name: Koehler, Ralf S.
name: Schuecker, Peter
name: Gebhardt, Karl
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The phases as well as the amplitudes of baryonic acoustic oscillations can be extracted out of a galaxy power spectrum and used as a standard ruler in a cosmological test. A non-oscillating phenomenological fitting function is used to extract the oscillatory part of the galaxy power spectrum and to disentangle phase information from amplitude information. The method (FITEX) is tested with simulated data of the Hubble Volume Simulation to include redshift space effects, non-linear structure growth and biasing. A cosmological test is introduced, which compares the extracted oscillations against a theoretical model template to derive constraints on the $w$ parameter. The phenomenological fitting function is found to model the various distortions of the galaxy power spectrum to the sub-percent level. The various distortions only boost the amplitude of the oscillations. The theoretical template is accurate enough to test for small deviations in the phases of the oscillations, resulting from different $w$ values. A cosmological test, using the baryonic acoustic oscillations as a standard ruler, is able to constrain $w$ in a robust way.
description: accepted for publication in Astron. Astrophys., 16 pages, 16 figures
The pion mass dependence of the nucleon form-factors of the energy momentum tensor in the chiral quark-soliton model
Creators: name: Goeke, K.
name: Grabis, J.
name: Ossmann, J.
name: Schweitzer, P.
name: Silva, A.
name: Urbano, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The nucleon form factors of the energy-momentum tensor are studied in the large-Nc limit in the framework of the chiral quark-soliton model for model parameters that simulate physical situations in which pions are heavy. This allows for a direct comparison to lattice QCD results.
description: 17 pages, 12 figures
What can ultracold Fermi gases teach us about high $T_c$ superconductors and vice versa?
Creators: name: Levin, K.
name: Chen, Qijin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We review recent developments in the field of ultracold atomic Fermi gases. As the cold atom system evolves from BCS to Bose-Einstein condensation (BEC), the behavior of the thermodynamics, and the particle density profiles evolves smoothly in a way which can be well understood theoretically. In the interesting "unitary" regime, we show that these and other data necessarily requires the introduction of a pseudogap in the fermionic spectrum which exhibits many striking similarities to its counterpart in underdoped high $T_c$ superconductors. We emphasize these similarities, giving an overview of the experimental tools and key issues of common interest in both systems.
description: 4 pages, 6 figures, to appear in a special issue of Physica C for the M2S-HTSC VIII Conference Proceedings
Valence-Band UPS, 6$p$ Core-Level XPS Photoemission Spectroscopy, and Low-Energy Electron Diffraction of a Uranium (001) Single Crystal
Creators: name: Opeil, C. P.
name: Schulze, R. K.
name: Manley, M. E.
name: Lashley, J. C.
name: Hults, W. L.
name: Hanrahan,, R. J.
name: Smith, J. L.
name: Mihaila, B.
name: Blagoev, K. B.
name: Albers, R. C.
name: Littlewood, P. B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Valence-band ultraviolet photoemission spectroscopy (UPS) at 173K and 6p core-level X-ray photoemission spectroscopy (XPS) at room temperature were performed on a high quality uranium single crystal. Significant agreement is found with first-principles electronic band-structure calculations, using a generalized gradient approximation (GGA). In addition, using Low Energy Electron Diffraction (LEED) for the (001) surface, we find a well-ordered orthorhombic crystallographic structure representative of the bulk material.
Measurement of resin pressure in composite laminates during cure
Creators: name: Mackenzie, Katherine A.
Publisher: name: University of British Columbia
Year: 2008

description: A promising method of measuring the resin pressure within a composite laminate during processing has been developed. This method can be used to investigate the control of voids, or resin flow and laminate compaction in several composite material processing methods such as ACND, hot press curing and resin transfer moulding. Sensor assemblies were developed and tested to show that their response is reproducible, linear and stable with temperature and time. Resin pressure profiles for three AS4/3501-6 laminates were generated and compared. The experimental results were compared to a resin flow model simulation. The prepreg used for the experiments was aged, so the simulation was run several times with various initial degrees of cure of the resin. Experimental data were compared to the simulation predictions to determine the apparent initial degree of cure of the resin, and the resin pressure profiles from the experiments and the simulation with this resin initial degree of cure were compared. The resin pressure within a laminate increases with the applied pressure until flow begins, at which time the resin pressure drops off progressively through the laminate thickness from the top surface to the tool plate. Conversely, the pressure at the surface of the laminate, next to the bleeder, remains at the vacuum pressure until the onset of flow when it increases as resin enters the bleeder. The measured resin pressure profiles were consistent both with the experimental results, and the simulation predictions. An advanced degree of cure of the resin at the start of the cure cycle significantly affects the resin flow and compaction in a laminate during cure.
Energies and radial distributions of B_s mesons on the lattice
Creators: name: Koponen, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: This is a follow-up to our earlier work for the energies and the charge (vector) and matter (scalar) distributions for S-wave states in a heavy-light meson, where the heavy quark is static and the light quark has a mass about that of the strange quark. We now study excited states of these mesons with higher angular momentum and with radial nodes. The calculation is carried out with dynamical fermions on a 16^3 times 32 lattice with a lattice spacing approximately 0.10 fm. The lattice configurations were generated by the UKQCD Collaboration. Attempts are now being made to understand these results in terms of the Dirac equation. In nature the closest equivalent of this heavy-light system is the B_s meson, which allows us to compare our lattice calculations to experimental results (where available) or give a prediction where the P-wave states should lie. We pay particular attention to the spin-orbit splitting, to see which one of the states (for a given angular momentum L) has the lower energy.
description: Based on a talk presented at the Final Euridice meeting in Kazimierz, Poland, 24-27 August 2006. v2: Table I and Figure 2 updated
Supplementary files for androgen receptor activation alleviates airway hyperresponsiveness, inflammation and remodeling in a murine model of asthma.docx
Creators: name: Kalidhindi, Rama Satyanarayana Raju
name: Nilesh Sudhakar Ambhore
name: Premanand Balraj
name: Schmit, Taylor
name: Khan, Nadeem
name: Venkatachalem Sathish
Publisher: name: figshare
Year: 2021
Subjects: subject: Physiology
subject: FOS: Biological sciences

description: Supplementary files for androgen receptor activation alleviates airway hyperresponsiveness, inflammation and remodeling in a murine model of asthma
Elicitation of vocabulary for new items
Creators: name: Parker, Verdena
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: hup

description: Audio files VP-300513-02 and VP-300513-03: Elicitation of vocabulary for items introduced to Hupa culture after contact with Euro-Americans in the mid-19th century. Based on "Schedule 24: New Words," pp. 192-195 of a Bureau of American Ethnography vocabulary schedule collected by Jeremiah Curtin in 1888-1889 (National Anthropological Archives MS 1442 and MS 2063), starting with 'bread' (VP-300513-02) and 'tobacco' (VP-300513-03).
Supplementary files for androgen receptor activation alleviates airway hyperresponsiveness, inflammation and remodeling in a murine model of asthma.docx
Creators: name: Kalidhindi, Rama Satyanarayana Raju
name: Nilesh Sudhakar Ambhore
name: Schmit, Taylor
name: Khan, Nadeem
name: Venkatachalem Sathish
Publisher: name: figshare
Year: 2021
Subjects: subject: Physiology
subject: FOS: Biological sciences

description: Supplementary files for androgen receptor activation alleviates airway hyperresponsiveness, inflammation and remodeling in a murine model of asthma
Evolution of the Solar Nebula. VIII. Spatial and Temporal Heterogeneity of Short-Lived Radioisotopes and Stable Oxygen Isotopes
Creators: name: Boss, Alan P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Isotopic abundances of short-lived radionuclides such as 26Al provide the most precise chronometers of events in the early solar system, provided that they were initially homogeneously distributed. On the other hand, the abundances of the three stable isotopes of oxygen in primitive meteorites show a mass-independent fractionation that survived homogenization in the solar nebula. As as result of this and other cosmochemical evidence, the degree of spatial heterogeneity of isotopes in the solar nebula has long been a puzzle. We show here that based on hydrodynamical models of the mixing and transport of isotopic anomalies formed at, or injected onto, the surface of the solar nebula, initially high levels of isotopic spatial heterogeneity are expected to fall to steady state levels (~10%) low enough to validate the use of 26Al for chronometry, but high enough to preserve the evidence for mass-independent fractionation of oxygen isotopes. The solution to this puzzle relies on the mixing being accomplished by the chaotic fluid motions in a marginally gravitationally unstable disk, as seems to be required for the formation of gas giant planets and by the inability of alternative physical processes to drive large-scale mixing and transport in the planet-forming midplane of the solar nebula. Such a disk is also capable of large-scale outward transport of the thermally annealed dust grains found in comets, and of driving the shock fronts that appear to be responsible for much of the thermal processing of the components of primitive meteorites, creating a self-consistent picture of the basic physical processes shaping the early solar nebula.
description: 25 pages, 10 figures
Correlation of the hidden-charm molecular tetraquarks and the charmoniumlike structures existing in the $B\to XYZ+K$
Creators: name: Wang, Fu-Lai
name: Yang, Xin-Dian
name: Chen, Rui
name: Liu, Xiang
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The molecular assignments to the three $P_c$ states and the similar production mechanism between the $Λ_b\to P_c+K$ and $B\to XYZ+K$ convince us the $B$ decaying to a charmonium state plus light mesons could be the appropriate production process to search for the charmoniumlike molecular tetraquarks. In this work, we systematically study the interactions between a charmed (charmed-strange) meson and an anti-charmed (anti-charm-strange) meson, which include the $D^{(*)}\bar{D}^{(*)}$, $\bar{D}^{(*)}\bar{D}_1$, $D^{(*)}\bar{D}_2^*$, $D_s^{(*)}\bar{D}_s^{(*)}$, ${D}_s^{(*)}\bar{D}_{s0}^*$, $D_s^{(*)}\bar{D}_{s1}^{\prime}$, ${D}_s^{(*)}\bar{D}_{s1}$, $D_s^{(*)}\bar{D}_{s2}^*$ systems. After adopting the one-boson-exchange effective potentials, our numerical results indicate that, on one hand, there can exist a serial of isoscalar charmoniumlike $\mathcal{D}\bar{\mathcal{D}}$ and $\mathcal{D}_s\bar{\mathcal{D}}_s$ molecular states, on the other hand, we can fully exclude the charged charmoniumlike states as the isovector charmoniumlike molecules. Meanwhile, we discuss the two-body hidden-charm decay channels for the obtained $\mathcal{D}\bar{\mathcal{D}}$ and $\mathcal{D}_s\bar{\mathcal{D}}_s$ molecules, especially the $D^{*}\bar{D}^{*}$ molecular tetraquarks. By analyzing the experimental data collected from the $B\to XYZ+K$ and the mass spectrum and two-body hidden-charm decay channels for the obtained $\mathcal{D}\bar{\mathcal{D}}$ and $\mathcal{D}_s\bar{\mathcal{D}}_s$ molecules, we find several possible hints of the existence of the charmoniumlike molecular tetraquarks, i.e., a peculiar characteristic mass spectrum of the isoscalar $D^*\bar{D}^*$ molecular systems can be applied to identify the charmoniumlike molecule. We look forward to the future experiments like the LHCb, Belle II, and BESIII Collaborations can test our results with more precise experimental data.
description: 26 pages, 9 figures
Kinetic SIR equations and particle limits
Creators: name: Ciallella, Alessandro
name: Pulvirenti, Mario
name: Simonella, Sergio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We present and analyze two simple $N$-particle particle systems for the spread of an infection, respectively with binary and with multi-body interactions. We establish a convergence result, as $N \to \infty$, to a set of kinetic equations, providing a mathematical justification of related numerical schemes. We analyze rigorously the time asymptotics of these equations, and compare the models numerically.
Simulating the COSMOS: The fraction of merging galaxies at high redshift
Creators: name: Kampczyk, P.
name: Lilly, S. J.
name: Carollo, C. M.
name: Scarlata, C.
name: Feldmann, R.
name: Koekemoer, A.
name: Leauthaud, A.
name: Taniguchi, Y.
name: Capak, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Simulations of nearby (0.015 < z < 0.025) SDSS galaxies have been used to reproduce as accurately as possible the appearance that they would have on COSMOS ACS images if they had been observed at z ~ 0.7 and z ~ 1.2. By adding the SDSS galaxies to random locations in the COSMOS images, we simulate the effects of chance superpositions of high redshift galaxies with unrelated foreground or background objects. We have used these simulated images, together with those of real COSMOS galaxies at these same redshifts, to undertake a "blind" morphological classification of galaxies to identify those that appear to be undergoing mergers and thus to estimate the change in merger fraction with redshift. We find that real mergers are harder to recognize at high redshift, and also that the chance superposition of unrelated galaxies often produces the appearance of mergers where in reality none exists. In particular, we estimate that 1.5 - 2.0% of objects randomly added to ACS images are misclassified as mergers due to projection with unrelated objects, and as a result, that 40% of the apparent mergers in COSMOS at z=0.7 are likely to be spurious. We find that the fraction of galaxies undergoing mergers increases as (1+z)^3.8+/-1.2 to z ~ 0.7 and that this trend appears to continue to z = 1.2. Merger candidates at z ~ 0.7 are bluer than the parent population, especially when the statistical effects of the chance projections are accounted for. Merger candidates are more asymmetric than the population as a whole, and are often associated with irregular morphology. Nevertheless, the majority (~60%) of the merger candidates appear to be associated with spiral galaxies although in this case we cannot correct for the effects of chance projections.
description: 24 pages, 7 figures; accepted for publication in the ApJ
High-temperature series expansions for the $q$-state Potts model on a hypercubic lattice and critical properties of percolation
Creators: name: Hellmund, Meik
name: Janke, Wolfhard
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present results for the high-temperature series expansions of the susceptibility and free energy of the $q$-state Potts model on a $D$-dimensional hypercubic lattice $\mathbb{Z}^D$ for arbitrary values of $q$. The series are up to order 20 for dimension $D\leq3$, order 19 for $D\leq 5$ and up to order 17 for arbitrary $D$. Using the $q\to 1$ limit of these series, we estimate the percolation threshold $p_c$ and critical exponent $γ$ for bond percolation in different dimensions. We also extend the 1/D expansion of the critical coupling for arbitrary values of $q$ up to order $D^{-9}$.
description: 2 references added
Additional file 1 of Multiple lifestyle factors and depressed mood: a cross-sectional and longitudinal analysis of the UK Biobank (N = 84,860)
Creators: name: Sarris, Jerome
name: Thomson, Russell
name: Hargraves, Fiona
name: Eaton, Melissa
name: de Manincor, Michael
name: Veronese, Nicola
name: Solmi, Marco
name: Stubbs, Brendon
name: Yung, Alison R.
name: Firth, Joseph
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Mental Health

description: Additional file 1: Table S1. Results of the cross-sectional analysis on the association between frequency of depressive moods and lifestyle factors and confounders. Table S2. Results of the longitudinal analysis on the association between frequency of depressive moods at follow-up and lifestyle factors and confounders. Table S3. Excluded neuropsychiatric disorders from UK Biobank records.
Key-Point Interpolation: A Sparse Data Interpolation Algorithm based on B-splines
Creators: name: Wang, Bolun
name: Jiang, Xin
name: Huo, Guanying
name: Su, Cheng
name: Yan, Dongming
name: Zheng, Zhiming
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Geometry (cs.CG)
subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences

description: B-splines are widely used in the fields of reverse engineering and computer-aided design, due to their superior properties. Traditional B-spline surface interpolation algorithms usually assume regularity of the data distribution. In this paper, we introduce a novel B-spline surface interpolation algorithm: KPI, which can interpolate sparsely and non-uniformly distributed data points. As a two-stage algorithm, our method generates the dataset out of the sparse data using Kriging, and uses the proposed KPI (Key-Point Interpolation) method to generate the control points. Our algorithm can be extended to higher dimensional data interpolation, such as reconstructing dynamic surfaces. We apply the method to interpolating the temperature of Shanxi Province. The generated dynamic surface accurately interpolates the temperature data provided by the weather stations, and the preserved dynamic characteristics can be useful for meteorology studies.
A gauge model for quantum mechanics on a stratified space
Creators: name: Huebschmann, J.
name: Rudolph, G.
name: Schmidt, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In the Hamiltonian approach on a single spatial plaquette, we construct a quantum (lattice) gauge theory which incorporates the classical singularities. The reduced phase space is a stratified Kähler space, and we make explicit the requisite singular holomorphic quantization procedure on this space. On the quantum level, this procedure furnishes a costratified Hilbert space, that is, a Hilbert space together with a system which consists of the subspaces associated with the strata of the reduced phase space and of the corresponding orthoprojectors. The costratified Hilbert space structure reflects the stratification of the reduced phase space. For the special case where the structure group is $\mathrm{SU}(2)$, we discuss the tunneling probabilities between the strata, determine the energy eigenstates and study the corresponding expectation values of the orthoprojectors onto the subspaces associated with the strata in the strong and weak coupling approximations.
description: 38 pages, 9 figures. Changes: comments on the heat kernel and coherent states have been added
Gas Dynamics in the Galaxy: Total Mass Distribution and the Bar Pattern Speed
Creators: name: Li, Zhi
name: Shen, Juntai
name: Gerhard, Ortwin
name: Clarke, Jonathan P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Gas morphology and kinematics in the Milky Way contain key information for understanding the formation and evolution of our Galaxy. We present a high resolution hydrodynamical simulation based on a realistic barred Milky Way potential constrained by recent observations. Our model can reproduce most features in the observed longitude-velocity diagram, including the Central Molecular Zone, the Near and Far 3-kpc arms, the Molecular Ring, and the spiral arm tangents. It can also explain the non-circular motions of masers obtained by the recent BeSSeL2 survey. The central gas kinematics are consistent with a mass of $6.9\times10^8\; {\rm M}_{\odot}$ in the Nuclear Stellar Disk. Our model predicts the formation of an elliptical gaseous ring surrounding the bar, which is composed of the 3-kpc arms, Norma arm, and the bar-spiral interfaces. This ring is similar to those "inner" rings in some Milky Way analogs with a boxy/peanut-shaped bulge. The kinematics of gas near the solar neighbourhood are governed by the Local arm, which is induced by the four major stellar spiral arms. The bar pattern speed constrained by our gas model is $37.5-40\; {\rm km}\;{\rm s}^{-1}\;{\rm kpc}^{-1}$, corresponding to a corotation radius of $R_{\rm CR}=6.0-6.4\;{\rm kpc}$. The rotation curve of our model rises gently within the central $\sim5\;{\rm kpc}$, which is significantly less steep than those predicted by modern zoom-in cosmological simulations such as Auriga.
description: 23 pages, 14 figures. ApJ accepted, comments are welcome
Gross-Neveu model as a laboratory for fermion discretization
Creators: name: Korzec, Tomasz
name: Wolff, Ulli
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We introduce a finite volume renormalization scheme for the N-Majorana-component O(N) invariant Gross-Neveu model. Universal observables are defined that are accessible to precise numerical simulation in various discretizations and allow for an extrapolation to the continuum limit. Here first numerical results with Wilson fermions are reported. For N=2 they reproduce exact finite volume continuum results in the massless Thirring model. Our N=8 data are ready for comparison for instance with staggered results in the future.
description: 7 pages, 4 figures, contribution to Lattice 2006 (Tuczon/AZ/USA)
E-string Quantum Curve
Creators: name: Chen, Jin
name: Haghighat, Babak
name: Kim, Hee-Cheol
name: Sperling, Marcus
name: Wang, Xin
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work we study the quantisation of the Seiberg-Witten curve for the E-string theory compactified on a two-torus. We find that the resulting operator expression belongs to the class of elliptic quantum curves. It can be rephrased as an eigenvalue equation with eigenvectors corresponding to co-dimension 2 defect operators and eigenvalues to co-dimension 4 Wilson surfaces wrapping the elliptic curve, respectively. Moreover, the operator we find is a generalised version of the van Diejen operator arising in the study of elliptic integrable systems. Although the microscopic representation of the co-dimension 4 defect only furnishes an $\mathrm{SO}(16)$ flavour symmetry in the UV, we find an enhancement in the IR to representations in terms of affine $E_8$ characters. Finally, using the Nekrasov-Shatashvili limit of the E-string BPS partition function, we give a path integral derivation of the quantum curve.
description: v2 typos corrected, added explanations on brane constructions, added references
Long-Lived Particles at Future Colliders
Creators: name: Suarez, Rebeca Gonzalez
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Long-lived particles have significant enough lifetimes as to, when produced in collisions, leave a distinct signature in the detectors. Driven by increasingly higher energies, trigger and reconstruction algorithms at particle colliders are optimized for increasingly heavier particles, which in turn, tend to be short-lived. This makes searches for long-lived particles difficult, usually requiring dedicated methods and sometimes dedicated hardware top spot them. However, taking upon the challenge brings enormous potential, since new, long-lived particles feature in a variety of promising new physics models that could answer most of the open questions of the standard model, such as: neutrino masses, Dark Matter, or the matter-antimatter unbalance in the Universe. Currently, the international high energy physics community is planning future facilities post-LHC, and various particle colliders have been proposed. Crucial physics cases connected to long-lived particles will be accessible then, and in this presentation, three interesting examples are highlighted: Heavy Neutral Leptons, Hidden Sectors connected to Dark Matter, and exotic Higgs boson decays. This is followed by a small review of the preliminary studies assuming different future colliders, exploiting the complementary advantages that different colliding particles and accelerator types provide.
description: Proceedings for the XXVII Epiphany Conference, submitted to be published in the June 2021 issue of Acta Physica Polonica B
Frame-independent vector-cloud neural network for nonlocal constitutive modeling on arbitrary grids
Creators: name: Zhou, Xu-Hui
name: Han, Jiequn
name: Xiao, Heng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Machine Learning (cs.LG)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Constitutive models are widely used for modeling complex systems in science and engineering, where first-principle-based, well-resolved simulations are often prohibitively expensive. For example, in fluid dynamics, constitutive models are required to describe nonlocal, unresolved physics such as turbulence and laminar-turbulent transition. However, traditional constitutive models based on partial differential equations (PDEs) often lack robustness and are too rigid to accommodate diverse calibration datasets. We propose a frame-independent, nonlocal constitutive model based on a vector-cloud neural network that can be learned with data. The model predicts the closure variable at a point based on the flow information in its neighborhood. Such nonlocal information is represented by a group of points, each having a feature vector attached to it, and thus the input is referred to as vector cloud. The cloud is mapped to the closure variable through a frame-independent neural network, invariant both to coordinate translation and rotation and to the ordering of points in the cloud. As such, the network can deal with any number of arbitrarily arranged grid points and thus is suitable for unstructured meshes in fluid simulations. The merits of the proposed network are demonstrated for scalar transport PDEs on a family of parameterized periodic hill geometries. The vector-cloud neural network is a promising tool not only as nonlocal constitutive models and but also as general surrogate models for PDEs on irregular domains.
Ο έρωτας και η σύσταση της ψυχής στον πλατωνικό Φαίδρο
Creators: name: Μήλιου, Αννέτα Ηλία
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Έρωτας
Ψυχή
Πλάτωνας
Love
Soul
Plato

description: Σκοπός της διατριβής ήταν η μελέτη του έρωτα, καθώς και της σύστασης της ψυχής στον πλατωνικό Φαίδρο. Αρχικά αναλύσαμε τον όρο της ψυχής στη φιλοσοφία του Πλάτωνα όπως καταδεικνύεται από τον ίδιο στα έργα του. Στη συνέχεια, διερευνήσαμε το ζήτημα του έρωτα, σε ό,τι αφορά την προέλευση του, την ποιότητά του και τα αποτελέσματα της βίωσης του από τον άνθρωπο έχοντας ως εφαλτήριο την πλατωνική σκέψη. Ακόμη αναφερθήκαμε στον πλατωνικό έρωτα, ως μανία, με αφορμή τη σύλληψη του κάλλους της αντίστοιχης μορφής μέσω της όρασης και τη διαμόρφωση της ανάμνησης της ιδεατής ομορφιάς. Επίσης, κάναμε λόγο για τη τριμερή μορφή της ψυχής σε συνάρτηση με το πώς λειτουργεί η τελευταία όταν ενδίδει στη μανία για το κάλλος. Τέλος ασχοληθήκαμε με τη σύνδεση της πλατωνικής φιλοσοφίας για την ψυχή και τον έρωτα με τις σημερινές συνθήκες σύλληψής τους από τον άνθρωπο
description: The purpose of this dissertation was the study of love as well as the composition of soul in the Platonic Phaedrus. We first analyzed the term f soul in Plato’s philosophy as it is demonstrated by himself in his writings. Then we subsequently searched the matter of love in terms of its origin, quality and human’s experience as these are based in Plato’s perception. In addition we made reference to the Platonic love, as a mania, occasionally understanding the corresponding figure’s beauty through vision and shaping the memory of the ideal beauty. We also spoke of the three-parted form of soul depending on how it works when it gives in to the beauty mania. In conclusion we got involved with the connection between -Platonic philosophy for soul and love- and today’s conditions of their understanding by human
Multi-Time-Scale Input Approaches for Hourly-Scale Rainfall-Runoff Modeling based on Recurrent Neural Networks
Creators: name: Ishida, Kei
name: Kiyama, Masato
name: Ercan, Ali
name: Amagasaki, Motoki
name: Tu, Tongbi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: This study proposes two straightforward yet effective approaches to reduce the required computational time of the training process for time-series modeling through a recurrent neural network (RNN) using multi-time-scale time-series data as input. One approach provides coarse and fine temporal resolutions of the input time-series to RNN in parallel. The other concatenates the coarse and fine temporal resolutions of the input time-series data over time before considering them as the input to RNN. In both approaches, first, finer temporal resolution data are utilized to learn the fine temporal scale behavior of the target data. Next, coarser temporal resolution data are expected to capture long-duration dependencies between the input and target variables. The proposed approaches were implemented for hourly rainfall-runoff modeling at a snow-dominated watershed by employing a long and short-term memory (LSTM) network, which is a newer type of RNN. Subsequently, the daily and hourly meteorological data were utilized as the input, and hourly flow discharge was considered as the target data. The results confirm that both of the proposed approaches can reduce the computational time for the training of RNN significantly (up to 32.4 times). Furthermore, one of the proposed approaches improves the estimation accuracy.
description: 11pages, 5 figures