cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Efficient Computation of Sparse Matrix Functions for Large-Scale Electronic Structure Calculations: The CheSS Library
Creators: name: Mohr, Stephan
name: Dawson, William
name: Wagner, Michael
name: Caliste, Damien
name: Nakajima, Takahito
name: Genovese, Luigi
Publisher: name: arXiv
Year: 2017
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We present CheSS, the "Chebyshev Sparse Solvers" library, which has been designed to solve typical problems arising in large-scale electronic structure calculations using localized basis sets. The library is based on a flexible and efficient expansion in terms of Chebyshev polynomials and presently features the calculation of the density matrix, the calculation of matrix powers for arbitrary powers, and the extraction of eigenvalues in a selected interval. CheSS is able to exploit the sparsity of the matrices and scales linearly with respect to the number of nonzero entries, making it well-suited for large-scale calculations. The approach is particularly adapted for setups leading to small spectral widths of the involved matrices and outperforms alternative methods in this regime. By coupling CheSS to the DFT code BigDFT, we show that such a favorable setup is indeed possible in practice. In addition, the approach based on Chebyshev polynomials can be massively parallelized, and CheSS exhibits excellent scaling up to thousands of cores even for relatively small matrix sizes.
Masaʻot shel Moshe ha-Leṿi: bi-zeman she-halakh me-ʻir Kafa li-Yerushalayim
Creators: Leṿi, Moshe ben Eliyahu, ha-Yerushalmi
Publisher: name: Columbia University
Year: 2016
Subjects: Voyages and travels
Jewish travelers

description: Manuscript in Hebrew on paper.
VITALISE D7.2 Ethical application documents for JRA3
Creators: name: Santonen Teemu
Publisher: name: Zenodo
Year: 2022

description: VITALISE brings together Living Labs across Europe (and 1 outside Europe in Canada) to create a Thematic ecosystem of Living Labs in the Health and Wellbeing domain, aiming at creating synergies and transnational collaboration opportunities through innovative Joint Research Activities (JRA). JRAs will also serve as the test bed for all the harmonization procedures, for assessing and improving the provided living lab services. JRA3 for everyday living environments will focus on evaluating the usage and applicability of innovative data collection technologies during the various everyday living activities executed inside and outside premises. The results will help to develop harmonized research protocol for developing big data–driven hybrid persona –hypothetical user archetypes created to represent a user community. This document presents the work performed for obtaining ethical approval for the research activities performed in JRA3. The results indicate significant ethical application process time differences between the countries ranging from few days to over two months. Three different types of the ethical boards were identified: internal, external and mixed boards. Internal entity referring to boards operating within the organization while external board is referring to a board which is not directly associated with the organization conducting the study. Mixed board includes both external and internal actors and can be managed by the research organization or external entity. All but one VITALISE JRA3 partner have submitted their ethical application. The missing partner (TREBAG) is submitting their application on April. Case studies incorporating AIT, LiCalab, CERTH, AUTH and McGill-UDEM have already received ethical approval. Laurea and INTRAS case studies were asked to do re-submission, which Laurea has already done while INTRAS is waiting for the Spanish Agency for Medicines and Health Products resolution on whether their study is considered as a medical device study before making the re-submission. GAIA has been waiting ethics board decision for over two months but should receive it on April. As a summary, it is concluded that JRA3 is progressing somewhat as planned, since additional information request are normal during the ethics process. The risk of delays that will have an impact on VITALISE project are not in sight.
Novel SM-like Higgs decay into displaced heavy neutrino pairs in U(1)' models
Creators: name: Accomando, E.
name: Rose, L. Delle
name: Moretti, S.
name: Olaiya, E.
name: Shepherd-Themistocleous, C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We examine the observability of heavy neutrino (nu_h) signatures of a U(1)' enlarged Standard Model (SM) encompassing three heavy Majorana neutrinos alongside the known light neutrino states at the the Large Hadron Collider (LHC). We show that heavy neutrinos can be rather long-lived particles producing distinctive displaced vertices that can be accessed in the CERN LHC detectors. We concentrate here on the gluon fusion production mechanism gg -> H_{1,2} -> nu_h nu_h, where H_1 is the discovered SM-like Higgs and H_2 is a heavier state, yielding displaced leptons following nu_h decays into weak gauge bosons. Using data collected by the end of the LHC Run 2, these signatures would prove to be accessible with negligibly small background.
description: 30 pages, journal version
Universal Brotherhood of Mankind from the primary perspective of Sikhism.
Creators: name: Saldanha, Savio
Publisher: name: Zenodo
Year: 2022
Subjects: Universal Brotherhood, Sikhism, Islam, Christianity, Hinduism

description: In this paper I have tried to capture the tenet of Universal brotherhood with a special reference to Sikhism. I have then compared it with the similar concepts found in Hinduism, Islam and Christianity. My aim is to show that the tenet of Universal Brotherhood is a value which unites all humanity into one family of being God’s children, irrespective of religion, region, caste or gender. It should be propagated to bring about the peace, equality, fraternity and liberty which the humanity is craving for. This paper is a part of an assignment for the subject of Indian Religions and Culture.
Fiber-dependent deautonomization of integrable 2D mappings and discrete Painlevé equations
Creators: name: Carstea, Adrian Stefan
name: Dzhamay, Anton
name: Takenawa, Tomoyuki
Publisher: name: arXiv
Year: 2017
Subjects: subject: Dynamical Systems (math.DS)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: It is well known that two-dimensional mappings preserving a rational elliptic fibration, like the Quispel-Roberts-Thompson mappings, can be deautonomized to discrete Painlevé equations. However, the dependence of this procedure on the choice of a particular elliptic fiber has not been sufficiently investigated. In this paper we establish a way of performing the deautonomization for a pair of an autonomous mapping and a fiber. %By choosing a particular Starting from a single autonomous mapping but varying the type of a chosen fiber, we obtain different types of discrete Painlevé equations using this deautonomization procedure. We also introduce a technique for reconstructing a mapping from the knowledge of its induced action on the Picard group and some additional geometric data. This technique allows us to obtain factorized expressions of discrete Painlevé equations, including the elliptic case. Further, by imposing certain restrictions on such non-autonomous mappings we obtain new and simple elliptic difference Painlevé equations, including examples whose symmetry groups do not appear explicitly in Sakai's classification.
description: 48 pages
Stability of emergent time periodicity in a few-body interacting system
Creators: name: Campbell, Steve
name: Eisert, Jens
name: Guarnieri, Giacomo
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We examine the onset and resilience of emergent time periodicity in a few-body all-to-all interacting Lipkin-Meshkov-Glick model, where one of the constituents is locally in contact with a thermal bath. Employing both a collision model framework and a suitable time-continuous description, we show that stable time-periodic behavior can only be exhibited when the bath acts as a purely dissipative channel. We assess the role that the microscopic interactions within the system play, establishing that for the all-to-all model the introduction of temperature leads to a melting of the emergent time periodicity, in contrast to stable long-time behavior which can be maintained for nearest neighbor $XXZ$ type interactions.
description: 8 pages, 4 figures. Close to published version
$u d \bar{b} \bar{b}$ tetraquark resonances with lattice QCD potentials and the Born-Oppenheimer approximation
Creators: name: Bicudo, Pedro
name: Cardoso, Marco
name: Peters, Antje
name: Pflaumer, Martin
name: Wagner, Marc
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study tetraquark resonances with lattice QCD potentials computed for a static bbar bbar pair in the presence of two lighter quarks u d, the Born-Oppenheimer approximation and the emergent wave method. As a proof of concept we focus on the system with isospin I = 0, but consider different relative angular momenta l of the heavy quarks bbar bbar. For l=0 a bound state has already been predicted with quantum numbers I(JP) = 0(1+). Exploring various angular momenta we now compute the phase shifts and search for S and T matrix poles in the second Riemann sheet. We predict a tetraquark resonance for l =1, decaying into two B mesons, with quantum numbers I(JP) = 0(1-), mass m = 10 \, 576^{+4}_{-4} MeV} and decay width Gamma = 112^{+90}_{-103} MeV.
description: 7 pages, 6 figures, 1 table, extended version
Gluon orbital angular momentum at small-$x$
Creators: name: Hatta, Yoshitaka
name: Nakagawa, Yuya
name: Xiao, Bowen
name: Yuan, Feng
name: Zhao, Yong
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a general analysis of the orbital angular momentum (OAM) distribution of gluons $L_g(x)$ inside the nucleon with particular emphasis on the small-$x$ region. We derive a novel operator representation of $L_g(x)$ in terms of Wilson lines and argue that it is approximately proportional to the gluon helicity distribution $L_g(x) \approx -2ΔG(x)$ at small-$x$. We also compute longitudinal single spin asymmetry in exclusive diffractive dijet production in lepton-nucleon scattering in the next-to-eikonal approximation and show that the asymmetry is a direct probe of the gluon helicity/OAM distribution as well as the QCD odderon exchange.
description: 22 pages. v2 significantly expands the previous version with all the details of derivation as well as a number of new results and discussions. The title and abstract are changed, and an author is added
Dynamic finite-size scaling at first-order transitions
Creators: name: Pelissetto, Andrea
name: Vicari, Ettore
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate the dynamic behavior of finite-size systems close to a first-order transition (FOT). We develop a dynamic finite-size scaling (DFSS) theory for the dynamic behavior in the coexistence region where different phases coexist. It is characterized by an exponentially large time scale related to the tunneling between the two phases. We show that, when considering time scales of the order of the tunneling time, the dynamic behavior can be described by a two-state coarse-grained dynamics. This allows us to obtain exact predictions for the dynamical scaling functions. To test the general DFSS theory at FOTs, we consider the two-dimensional Ising model in the low-temperature phase, where the external magnetic field drives a FOT, and the 20-state Potts model, which undergoes a thermal FOT. Numerical results for a purely relaxational dynamics fully confirm the general theory.
description: 13 pages
Balanced Splitting: A Framework for Achieving Zero-wait in the Multiserver-job Model
Creators: name: Anselmi, Jonatha
name: Doncel, Josu
Publisher: name: arXiv
Year: 2024
Subjects: subject: Performance (cs.PF)
subject: FOS: Computer and information sciences
subject: 68M20

description: We present a new framework for designing nonpreemptive and job-size oblivious scheduling policies in the multiserver-job queueing model. The main requirement is to identify a static and balanced sub-partition of the server set and ensure that the servers in each set of that sub-partition can only handle jobs of a given class and in a first-come first-served order. A job class is determined by the number of servers to which it has exclusive access during its entire execution and the probability distribution of its service time. This approach aims to reduce delays by preventing small jobs from being blocked by larger ones that arrived first, and it is particularly beneficial when the job size variability intra resp. inter classes is small resp. large. In this setting, we propose a new scheduling policy, Balanced-Splitting. We provide a sufficient condition for the stability of Balanced-Splitting and show that the resulting queueing probability, i.e., the probability that an arriving job needs to wait for processing upon arrival, vanishes in both the subcritical (the load is kept fixed to a constant less than one) and critical (the load approaches one from below) many-server limiting regimes. Crucial to our analysis is a connection with the M/GI/s/s queue and Erlang's loss formula, which allows our analysis to rely on fundamental results from queueing theory. Numerical simulations show that the proposed policy performs better than several preemptive/nonpreemptive size-aware/oblivious policies in various practical scenarios. This is also confirmed by simulations running on real traces from High Performance Computing (HPC) workloads. The delays induced by Balanced-Splitting are also competitive with those induced by state-of-the-art policies such as First-Fit-SRPT and ServerFilling-SRPT, though our approach has the advantage of not requiring preemption, nor the knowledge of job sizes.
Spectral intertwining relations in exactly solvable quantum-mechanical systems
Creators: name: Houri, Tsuyoshi
name: Sakamoto, Makoto
name: Tatsumi, Kentaro
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: In exactly solvable quantum-mechanical systems, ladder and intertwining operators play a central role because, if they are found, the energy spectra can be obtained algebraically. In this paper, we propose the spectral intertwining relation as a unified relation of ladder and intertwining operators in a way that can depend on the energy eigenvalues. It is shown that the spectral intertwining relations can connect eigenfunctions of different energy eigenvalues belonging to two different Hamiltonians, which cannot be obtained by previously known structures such as shape invariance. As an application, we find new spectral intertwining operators for the Hamiltonians of the hydrogen atom and the Rosen--Morse potential.
description: 13 pages and 5 figures, published version
NSF Science and Technology Center (STC) Learning the Earth with Artificial Intelligence and Physics (LEAP) Code of Conduct (Version 1, October 17, 2022)
Creators: name: Gentine, Pierre
name: McKinley, Galen
name: Zheng, Tian
name: Cogburn, Courtney
name: Abernathey, Ryan
name: Zanna, Laure
name: Vondrick, Carl
name: Burbano, Vanessa
name: Revkin, Andrew
name: Lawrence, David
name: Pritchard, Michael
Publisher: name: Zenodo
Year: 2022
Subjects: climate science
data science
machine learning
climate change

description: LEAP's Code of Conduct outlines the responsibilities and ethical standards for LEAP's members. LEAP's Code of Conduct will be updated and versioned on a periodic basis. The current version is V1, dated October 17, 2022.
Enhanced concentrations of nitrogen-vacancy centers in diamond through TEM irradiation
Creators: name: Farfurnik, D.
name: Alfasi, N.
name: Masis, S.
name: Kauffmann, Y.
name: Farchi, E.
name: Romach, Y.
name: Hovav, Y.
name: Buks, E.
name: Bar-Gill, N.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The studies of many-body dynamics of interacting spin ensembles, as well as quantum sensing in solid state systems, are often limited by the need for high spin concentrations, along with efficient decoupling of the spin ensemble of interest from its spin-bath environment. In particular, for an ensemble of nitrogen-vacancy (NV) centers in diamond, high conversion efficiencies between nitrogen (P1) defects and NV centers are essential, while maintaining long coherence times of an NV ensemble. In this work, we study the effect of electron irradiation on the conversion efficiency and the coherence time of various types of diamond samples with different initial nitrogen concentrations. The samples were irradiated using a 200 keV transmission electron microscope (TEM). Our study reveals that the efficiency of NV creation strongly depends on the initial conversion efficiency as well as on the initial nitrogen concentration. We observe an order of magnitude improvement in the NV concentration (up to $\sim 10^{11}$ NV/cm^2), without any degradation in their coherence times of $\sim 180$ μm. We address the potential of this technique to pave the way toward the study of many-body physics of ensembles of NV spins, and contribute to the creation of non-classical spin states for quantum sensing.
Turbulence intensity and the friction factor for smooth- and rough-wall pipe flow
Creators: name: Basse, Nils T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Turbulence intensity profiles are compared for smooth- and rough-wall pipe flow measurements made in the Princeton Superpipe. The profile development in the transition from hydraulically smooth to fully rough flow displays a propagating sequence from the pipe wall towards the pipe axis. The scaling of turbulence intensity with Reynolds number shows that the smooth- and rough wall level deviates with increasing Reynolds number. We quantify the correspondence between turbulence intensity and the friction factor.
Non-Hermiticity Induced Flat Band
Creators: name: Ramezani, Hamidreza
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We demonstrate the emergence of an entire flat band embedded in dispersive bands at the exceptional point of a PT symmetric photonic lattice. For this to occur, the gain and loss parameter effectively alters the size of the partial flat band windows and band gap of the photonic lattice simultaneously. The mode associated with the entire flat band is robust against changes in the system size and survives even at the edge of the lattice. Our proposal offers a route for controllable localization of light in non-Hermitian systems and a technique for measuring non-Hermiticity via localization.
Massive fluctuations in deconfining SU(2) Yang-Mills thermodynamics
Creators: name: Bischer, Ingolf
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We review how vertex constraints inherited from the thermal ground state strongly reduce the integration support of loop four-momenta associated with massive quasi-particles in bubble diagrams constituting corrections to the free thermal quasi-particle pressure. In spite of the observed increasingly suppressing effect when increasing 2-particle-irreducible (2PI) loop order, a quantitative analysis enables us to disprove the conjecture voiced in hep-th/0609033 that the loop expansion would terminate at a finite order. This reveals the necessity to investigate exact expressions of (at least some) higher-loop order diagrams. Explicit calculation shows that although the behaviour of the 2PI three-loop contribution at low temperatures displays hierarchical suppression compared to lower loop-orders, its high-temperature expression instead dominates all lower orders. However, an all-loop-order resummation of a class of 2PI bubble diagrams is shown to yield an analytic continuation of the low-temperature hierarchy to all temperatures in the deconfining phase.
description: 12 pages, 8 figures
Effects of H$^-$ low beam irradiation and high field pulsing tests in different metals
Creators: name: Serafim, C.
name: Calatroni, S.
name: Djurabekov, F.
name: Peacock, R.
name: Bjelland, V.
name: Perez-Fontenla, A. T.
name: Wuensch, W.
name: Grudiev, A.
name: Lombardi, S. Sgobba A.
name: Sargsyan, E.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: This work studies the suitability of a set of different materials for manufacturing of more efficient and durable Radio-Frequency Quadrupole (RFQ) structures compared to that currently used in many linear particle accelerators, traditionally made out of copper. RFQs are susceptible to vacuum breakdowns caused by the exposure to high electric fields, resulting in surface degradation. Additionally, a further limitation of present-day copper RFQs is surface blistering under hydrogen ion beam exposure, due to beam halo losses. Irradiation is associated with a further reduction of the breakdown field strength of the metal surface thereby affecting the overall efficiency of the RFQ. The investigated materials, Cu-OFE, CuCr1Zr, CuBe2, Ti6Al4V, SS316LN, Nb and Ta, were submitted to low-energy (45 keV) H$^-$ irradiation and tested in a direct-current (DC) system with pulsed high voltage. For comparison, the maximum surface electric field was measured for both irradiated and pristine (non irradiated) surfaces of the same material. The effects of irradiation on the surface of the materials, before and after being submitted to high electric fields, were studied with the help of microscopic imaging and chemical analysis. Blistering caused by H$^-$ irradiation has been observed in all copper and copper alloy materials. Despite reductions in breakdown field strength post-irradiation, no indications were found that the blisters on the surface have a direct cause in triggering breakdowns during high electric field tests. SS316LN, Ti6Al4V, CuBe2 and CuCr1Zr showed maximum surface electric fields higher than copper, making these promising candidate materials for future RFQs manufacturing. This paper focuses on the results with CuCr1Zr, CuBe2, SS316LN and Ta, complementing and expanding previous work exploring Cu-OFE, Nb and Ti6Al4V.
Sterile neutrinos facing kaon physics experiments
Creators: name: Abada, Asmaa
name: Becirevic, Damir
name: Sumensari, Olcyr
name: Weiland, Cedric
name: Funchal, Renata Zukanovich
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We discuss weak kaon decays in a scenario in which the Standard Model is extended by massive sterile fermions. After revisiting the analytical expressions for leptonic and semileptonic decays we derive the expressions for decay rates with two neutrinos in the final state. By using a simple effective model with only one sterile neutrino, compatible with all current experimental bounds and general theoretical constraints, we conduct a thorough numerical analysis which reveals that the impact of the presence of massive sterile neutrinos on kaon weak decays is very small, less than $1\%$ on decay rates. The only exception is $\mathcal{B} (K_L\to νν)$, which can go up to $\mathcal{O}( 10^{-10})$, thus possibly within the reach of the KOTO experiment. In other words, if all the future measurements of weak kaon decays turn out to be compatible with the Standard Model predictions, this would not rule out the existence of massive light sterile neutrinos with non-negligible active-sterile mixing. Instead, for a sterile neutrino of mass below $m_K$, one might obtain a huge enhancement of $\mathcal{B} (K_L\to νν)$, otherwise negligibly small in the Standard Model.
description: 32 pages, 11 plots in 6 figures, version published in PRD
Orbital Evolution of Moons in Weakly Accreting Circumplanetary Disks
Creators: name: Fujii, Yuri I.
name: Kobayashi, Hiroshi
name: Takahashi, Sanemichi Z.
name: Gressel, Oliver
Publisher: name: arXiv
Year: 2017
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We investigate the formation of hot and massive circumplanetary disks (CPDs) and the orbital evolution of satellites formed in these disks. Because of the comparatively small size-scale of the sub-disk, quick magnetic diffusion prevents the magnetorotational instability (MRI) from being well-developed at ionization levels that would allow MRI in the parent protoplanetary disk. In the absence of significant angular momentum transport, continuous mass supply from the parental protoplanetary disk leads to the formation of a massive CPD. We have developed an evolutionary model for this scenario and have estimated the orbital evolution of satellites within the disk. We find, in a certain temperature range, that inward migration of a satellite can be stopped by a change in the structure due to the opacity transitions. Moreover, by capturing second and third migrating satellites in mean motion resonances, a compact system in Laplace resonance can be formed in our disk models.
description: 10 pages, 9 figures
Stable black holes in shift-symmetric Horndeski theories
Creators: name: Tretyakova, Daria A.
name: Takahashi, Kazufumi
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In shift-symmetric Horndeski theories, a static and spherically symmetric black hole can support linearly time-dependent scalar hair. However, it was shown that such a solution generically suffers from ghost or gradient instability in the vicinity of the horizon. In the present paper, we explore the possibility to avoid the instability, and present a new example of theory and its black hole solution with a linearly time-dependent scalar configuration. We also discuss the stability of solutions with static scalar hair for a special case where nonminimal derivative coupling to the Einstein tensor appears.
description: 14 pages; matches published version
Masses of Scalar and Axial-Vector B Mesons Revisited
Creators: name: Cheng, Hai-Yang
name: Yu, Fu-Sheng
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The SU(3) quark model encounters a great challenge in describing even-parity mesons. Specifically, the $q\bar q$ quark model has difficulties in understanding the light scalar mesons below 1 GeV, scalar and axial-vector charmed mesons and $1^+$ charmonium-like state $X(3872)$. A common wisdom for the resolution of these difficulties lies on the coupled channel effects which will distort the quark model calculations. In this work, we focus on the near mass degeneracy of scalar charmed mesons, $D_{s0}^*$ and $D_0^{*0}$, and its implications. Within the framework of heavy meson chiral perturbation theory, we show that near degeneracy can be qualitatively understood as a consequence of self-energy effects due to strong coupled channels. Quantitatively, the closeness of $D_{s0}^*$ and $D_0^{*0}$ masses can be implemented by adjusting two relevant strong couplings and the renormalization scale appearing in the loop diagram. Then this in turn implies the mass similarity of $B_{s0}^*$ and $B_0^{*0}$ mesons. The $P_0^* P'_1$ interaction with the Goldstone boson is crucial for understanding the phenomenon of near degeneracy. Based on heavy quark symmetry in conjunction with corrections from QCD and $1/m_Q$ effects, we obtain the masses of $B^*_{(s)0}$ and $B'_{(s)1}$ mesons, for example, $M_{B_{s0}^*}= (5715\pm1)\,{\rm MeV}+δΔ_S$, $M_{B'_{s1}}=(5763\pm1)\,{\rm MeV}+δΔ_S$ with $δΔ_S$ being $1/m_Q$ corrections. We find that the predicted mass difference of 48 MeV between $B'_{s1}$ and $B_{s0}^*$ is larger than that of $20\sim 30$ MeV inferred from the relativistic quark models, whereas the difference of 15 MeV between the central values of $M_{B'_{s1}}$ and $M_{B'_1}$ is much smaller than the quark model expectation of $60-100$ MeV.
description: 21 pages, 1 figure, to appear in Eur. Phys. J. (2017). arXiv admin note: text overlap with arXiv:1404.3771
The communication-hiding pipelined BiCGStab method for the parallel solution of large unsymmetric linear systems
Creators: name: Cools, Siegfried
name: Vanroose, Wim
Publisher: name: arXiv
Year: 2016
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences
subject: 65F10

description: A High Performance Computing alternative to traditional Krylov subspace methods, pipelined Krylov subspace solvers offer better scalability in the strong scaling limit compared to standard Krylov subspace methods for large and sparse linear systems. The typical synchronization bottleneck is mitigated by overlapping time-consuming global communication phases with local computations in the algorithm. This paper describes a general framework for deriving the pipelined variant of any Krylov subspace algorithm. The proposed framework was implicitly used to derive the pipelined Conjugate Gradient (p-CG) method in "Hiding global synchronization latency in the preconditioned Conjugate Gradient algorithm" by P. Ghysels and W. Vanroose, Parallel Computing, 40(7):224--238, 2014. The pipelining framework is subsequently illustrated by formulating a pipelined version of the BiCGStab method for the solution of large unsymmetric linear systems on parallel hardware. A residual replacement strategy is proposed to account for the possible loss of attainable accuracy and robustness by the pipelined BiCGStab method. It is shown that the pipelined algorithm improves scalability on distributed memory machines, leading to significant speedups compared to standard preconditioned BiCGStab.
description: 24 pages, 5 figures, 4 tables, 45 references
Small-scale Intensity Mapping: Extended Ly$α$, H$α$ and Continuum emission as a Probe of Halo Star Formation in High-redshift Galaxies
Creators: name: Mas-Ribas, Lluís
name: Dijkstra, Mark
name: Hennawi, Joseph F.
name: Trenti, Michele
name: Momose, Rieko
name: Ouchi, Masami
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Lyman alpha halos are observed ubiquitously around star-forming galaxies at high redshift, but their origin is still a matter of debate. We demonstrate that the emission from faint unresolved satellite sources, $M_{\rm UV} \gtrsim -17$, clustered around the central galaxies may play a major role in generating spatially extended Ly$α$, continuum (${\rm UV + VIS}$) and H$α$ halos. We apply the analytic formalism developed in Mas-Ribas & Dijkstra (2016) to model the halos around Lyman Alpha Emitters (LAEs) at $z=3.1$, for several different satellite clustering prescriptions. In general, our UV and Ly$α$ surface brightness profiles match the observations well at $20\lesssim r \lesssim 40$ physical kpc from the centers of LAEs. We discuss how our profiles depend on various model assumptions and how these can be tested and constrained with future H$α$ observations by the James Webb Space Telescope (JWST). Our analysis shows how spatially extended halos constrain (i) the presence of otherwise undetectable satellite sources, (ii) the integrated, volumetric production rates of Ly$α$ and LyC photons, and (iii) their population-averaged escape fractions. These quantities are all directly relevant for understanding galaxy formation and evolution and, for high enough redshifts, cosmic reionization.
description: 13 pages, 6 figures, edited to match accepted ApJ version. Results unaffected. New descriptive flow-chart figure (Fig.6)
Scalar resonant frequencies and Hawking effect of an $f(R)$ global monopole
Creators: name: Vieira, H. S.
name: Graça, J. P. Morais
name: Bezerra, V. B.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Massive scalar fields are considered in the gravitational field produced by a Schwarzschild black hole with a global monopole in $f(R)$ gravity. The exact solution of the radial part of the Klein-Gordon equation in this background is obtained and is given in terms of the general Heun functions. We apply the properties of the general Heun functions to study the Hawking radiation and the resonant frequencies of scalar particles.
description: 12 pages, 8 figures
Solving The Muon g-2 Anomaly With Natural NMSSM From Generalized Deflected AMSB
Creators: name: Ning, Xuyang
name: Wang, Fei
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose to realize (natural) NMSSM spectrum from deflected AMSB with new messenger-matter interactions. With additional messenger-matter interactions involving ${\bf 10}\oplus{\bf \overline{10}}$ representation messengers, the muon g-2 anomaly can be solved at $2σ$ (or $3σ$) level with the corresponding gluino mass range $2.8~{\rm TeV}
description: 23 pages, 7 figures
Student Major Choice as Decision-Making Processes Among Z Generation: Discourse Reopening and Future Research Agenda
Creators: name: Iliashenko, Iuliia
name: Mardenova, Leila
Publisher: name: Economia Aziendale Online -
Year: 2023
Subjects: students’ major choice, social media, digital transformation, Generation Z, decision-making processes, digitalization, students’ major choice models.

description: This research discovers a “digital-shift” in social life within the scientific research devoted to the major choice among students who belong to Generation Z, providing a systematic literature review and outlining the future research agenda. The study describes the existing models of student major choice in order to disclose these models within “Digital – Z-students” frame, distilling the significant Generation Z attributes affecting students’ decision-making processes. The study, based on the systematic literature review on the student major choice which relies on PRISMA method, provides suggestions for the conceptualization of the interrelation of the major choice determinants' influence and particular characteristics of Generation Z in the context of the digital transformation of the social life The paper examines widening of the social media communicational functions regarding the modern educational processes. The paper suggests recommendations on the prospective research avenues to provide a new discourse of the students’ major choice consideration and background for further estimation of the digitalization impact on Z-students’ behavioural intentions to choose a major. Finally, the study suggests an explanatory framework that is to consider the peculiarities of the modern students' major choice decision-making processes to provide the higher education sector with more comprehensive knowledge in order to match the needs of modern society.
description: Economia Aziendale Online -, Vol 14, No 2 (2023): ISSUE 2/2023
Two-component droplet phases and their spectral stability in one dimension
Creators: name: Charalampidis, Efstathios G.
name: Mistakidis, Simeon I.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We unravel the existence and stability properties of one-dimensional droplets arising in genuine two-component particle imbalanced bosonic mixtures under the influence of a weak harmonic confinement. A plethora of miscible droplet phases is found with the majority component atoms in the vicinity of the minority ones assembling in a droplet configuration while the remaining excess atoms being in the gas state. Our computations identify a transition from a bound to a trapped gas many-body state for increasing total atom number and fixed interactions, with the bound character being prolonged for stronger intercomponent attractions. Spectral stability of these two-component droplets is revealed by examining their underlying Bogoliubov-de-Gennes excitation spectrum. Furthermore, the collective dynamics associated with the fundamental dipole and breathing modes of the system is monitored by suddenly shifting the trap's center or quenching the trap's frequency, respectively. There, a back action of the significantly localized minority component is imprinted in the majority cloud. The present findings can be simulated in recent cold-atom experiments, thus setting the stage for probing the complex nonequilibrium dynamics of two-component droplets.
description: 13 pages, 8 figures
Super Generalized Central Limit Theorem: Limit distributions for sums of non-identical random variables with power-laws
Creators: name: Shintani, Masaru
name: Umeno, Ken
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistics Theory (math.ST)
subject: Mathematical Physics (math-ph)
subject: General Economics (econ.GN)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: In nature or societies, the power-law is present ubiquitously, and then it is important to investigate the mathematical characteristics of power-laws in the recent era of big data. In this paper we prove the superposition of non-identical stochastic processes with power-laws converges in density to a unique stable distribution. This property can be used to explain the universality of stable laws such that the sums of the logarithmic return of non-identical stock price fluctuations follow stable distributions.
description: 4pages,1figure
A sparse domination principle for rough singular integrals
Creators: name: Conde-Alonso, Jose M.
name: Culiuc, Amalia
name: Di Plinio, Francesco
name: Ou, Yumeng
Publisher: name: arXiv
Year: 2016
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 42B20

description: We prove that bilinear forms associated to the rough homogeneous singular integrals $T_Ω$ on $\mathbb R^d$, where the angular part $Ω\in L^q (S^{d-1})$ has vanishing average and $1
description: 29 pages. References updated. Final version to appear on Analysis&PDE
Holographic calculation of entanglement entropy in the presence of boundaries
Creators: name: Astaneh, Amin Faraji
name: Berthiere, Clement
name: Fursaev, Dmitri
name: Solodukhin, Sergey N.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: When a spacetime has boundaries, the entangling surface does not have to be necessarily compact and it may have boundaries as well. Then there appear a new, boundary, contribution to the entanglement entropy due to the intersection of the entangling surface with the boundary of the spacetime. We study the boundary contribution to the logarithmic term in the entanglement entropy in dimensions $d=3$ and $d=4$ when the entangling surface is orthogonal to the boundary. In particular, we compute a boundary term in the entropy of ${\mathcal{N}}=4$ super-gauge multiplet at weak coupling. This result is compared with the holographic calculation of the entropy based on the Ryu-Takayanagi proposal adapted appropriately to the present situation. We find a complete agreement between these two calculations provided the boundary conditions imposed on the gauge multiplet preserve $1/2$ of the supersymmetry and the extension of the boundary into the AdS bulk is a minimal hypersurface.
description: v3: minor corrections, accepted for publication in PRD
Senior Secondary School Science Teachers Participation in Workshops, Conferences and Seminar in Calabar Metropolis in Cross River State, Nigeria.pdf
Creators: name: Inyang, Mary  Imo
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 399999
subject: Other education not elsewhere classified

description: This study investigated the level of senior secondary school science teachers' participation in the professional workshops, conferences and seminars in Calabar metropolis in Cross River State Nigeria. A sample of one hundred and thirty five (135) science teachers (Biology, Chemistry, and Physics) was used for the study. The study was investigatory and a twenty two (22) item questionnaire titled the Teachers Conference, Workshop and Seminar Participation Questionnaire (TCWSPQ)...
The $L^p$ boundedness of wave operators for the three-dimensional multi-centre point interaction
Creators: name: Dell'Antonio, Gianfausto
name: Michelangeli, Alessandro
name: Scandone, Raffaele
name: Yajima, Kenji
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mathematical Physics (math-ph)
subject: Functional Analysis (math.FA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We prove that, for arbitrary centres and strengths, the wave operators for three dimensional Schrödinger operators with multi-centre local point interactions are bounded in $L^p(\mathbb{R}^3)$ for $1
description: to appear on Annales Henri Poincar\'e, 2017
Background force compensation in dynamic atomic force microscopy
Creators: name: Borgani, Riccardo
name: Thorén, Per-Anders
name: Forchheimer, Daniel
name: Dobryden, Illia
name: Sah, Si Mohamed
name: Claesson, Per Martin
name: Haviland, David B.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Background forces are linear long-range interactions of the cantilever body with its surroundings that must be compensated for in order to reveal tip-surface force, the quantity of interest for determining material properties in atomic force microscopy. We provide a mathematical derivation of a method to compensate for background forces, apply it to experimental data, and discuss how to include background forces in simulation. Our method, based on linear-response theory in the frequency domain, provides a general way of measuring and compensating for any background force and it can be readily applied to different force reconstruction methods in dynamic AFM.
description: Author prepared version of a manuscript published at Physical Review Applied. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI
eXtended Variational Quasicontinuum Methodology for Lattice Networks with Damage and Crack Propagation
Creators: name: Rokoš, Ondřej
name: Peerlings, Ron H. J.
name: Zeman, Jan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Lattice networks with dissipative interactions are often employed to analyze materials with discrete micro- or meso-structures, or for a description of heterogeneous materials which can be modelled discretely. They are, however, computationally prohibitive for engineering-scale applications. The (variational) QuasiContinuum (QC) method is a concurrent multiscale approach that reduces their computational cost by fully resolving the (dissipative) lattice network in small regions of interest while coarsening elsewhere. When applied to damageable lattices, moving crack tips can be captured by adaptive mesh refinement schemes, whereas fully-resolved trails in crack wakes can be removed by mesh coarsening. In order to address crack propagation efficiently and accurately, we develop in this contribution the necessary generalizations of the variational QC methodology. First, a suitable definition of crack paths in discrete systems is introduced, which allows for their geometrical representation in terms of the signed distance function. Second, special function enrichments based on the partition of unity concept are adopted, in order to capture kinematics in the wakes of crack tips. Third, a summation rule that reflects the adopted enrichment functions with sufficient degree of accuracy is developed. Finally, as our standpoint is variational, we discuss implications of the mesh refinement and coarsening from an energy-consistency point of view. All theoretical considerations are demonstrated using two numerical examples for which the resulting reaction forces, energy evolutions, and crack paths are compared to those of the direct numerical simulations.
description: 36 pages, 23 figures, 1 table, 2 algorithms; small changes after review, paper title changed
Long-Range Nonlocality in Six-Point String Scattering: simulation of black hole infallers
Creators: name: Dodelson, Matthew
name: Silverstein, Eva
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We set up a tree-level six point scattering process in which two strings are separated longitudinally such that they could only interact directly via a non-local spreading effect such as that predicted by light cone gauge calculations and the Gross-Mende saddle point. One string, the `detector', is produced at a finite time with energy $E$ by an auxiliary $2\to 2$ sub-process, with kinematics such that it has sufficient resolution to detect the longitudinal spreading of an additional incoming string, the `source'. We test this hypothesis in a gauge-invariant S-matrix calculation convolved with an appropriate wavepacket peaked at a separation $X$ between the central trajectories of the source and produced detector. The amplitude exhibits support for scattering at the predicted longitudinal separation $X\simα' E$, in sharp contrast to the analogous quantum field theory amplitude (whose support manifestly traces out a tail of the position-space wavefunction). The effect arises in a regime in which the string amplitude is not obtained as a convergent sum of such QFT amplitudes, and has larger amplitude than similar QFT models (with the same auxiliary four point amplitude). In a linear dilaton background, the amplitude depends on the string coupling as expected if the scattering is not simply occuring on the wavepacket tail in string theory. This manifests the scale of longitudinal spreading in a gauge-invariant S-matrix amplitude, in a calculable process with significant amplitude. It simulates a key feature of the dynamics of time-translated horizon infallers.
description: 42 pages, 9 figures. v2: 43 pages, 9 figures. Added section on vertex operator integral, other small corrections. v3: minor addition on probability and normalization