cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Mid-Infrared Spectra of High Redshift (z>2) Radio Galaxies
Creators: name: Seymour, N.
name: Ogle, P.
name: De Breuck, C.
name: Fazio, G. G.
name: Galametz, A.
name: Haas, M.
name: Lacy, M.
name: Sajina, A.
name: Stern, D.
name: Willner, S. P.
name: Vernet, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the first mid-infrared Spitzer/Infrared Spectrograph (IRS) observations of powerful radio galaxies at z>2. These radio galaxies, 4C +23.56 (z=2.48) and 6C J1908+7220 (z=3.53), both show strong mid-infrared continua, but with 6C J1908+7220 also showing strong PAH emission at rest-frame 6.2 and 7.7um. In 4C+23.56 we see no obvious PAH features above the continuum. The PAH emission in 6C J1908+7220 is the amongst the most distant observed to date and implies that there is a large instantaneous star formation rate (SFR). This is consistent with the strong detection of 6C J1908+7220 at far-IR and sub-mm wavelengths, indicative of large amounts of cold dust, ~10^9Msun. Powerful radio galaxies at lower redshifts tend to have weak or undetectable PAH features and typically have lower far-IR luminosities. In addition, 4C 23.56 shows moderate silicate absorption as seen in less luminous radio galaxies, indicating tau_{9.7um}=0.3+/-0.05. This feature is shifted out of the observed wavelength range for 6C J1908+7220. The correlation of strong PAH features with large amounts of cold dust, despite the presence of a powerful AGN, is in agreement with other recent results and implies that star formation at high redshift is, in some cases at least, associated with powerful, obscured AGN.
description: 6 pages, 3 figures, includes emulateapj.cls, in press ApJL
State of Open Access Procedures at Research Infrastructures
Creators: name: Giacomo, Ornela De
name: Kolar, Jana
name: Brzosko, Dariusz
Publisher: name: Zenodo
Year: 2021
Subjects: Research Infrastructures
Open Access Procedures

description: The COVID-19 emergency has challenged facilities in an unprecedented way, affecting their operations, performance and procedures. An overview of these disruptions and the measures put in place by RIs to cope with the COVID-19 outbreak were collected and published, to allow facilities to share best practices in front of this serious challenge. A summary of the most relevant findings is included in this document. Research Infrastructures (RIs) were forced to speed up and apply remote access extensively, raising a series of issues partly due to the lack of technologies and dedicated funds to support it. ACCELERATE partners have the possibility to consider the experience of these facilities for developing or improving their policies and procedures, including the most recent developments as remote access and data issues. The information collected about facilities procedures for open access, in very different formats (interviews, emails, policies, etc.) has been summarised in a table (Annex II) to improve the readability and allow for a better comparison of the different access policies and solutions adopted by the RIs involved. In the same way, the surveys used to collect information about the COVID-19 related services implemented by facilities are included as annexes III, IV and IV.
Measuring the Decoherence of a Quantronium Qubit with the Cavity Bifurcation Amplifier
Creators: name: Metcalfe, M.
name: Boaknin, E.
name: Manucharyan, V.
name: Vijay, R.
name: Siddiqi, I.
name: Rigetti, C.
name: Frunzio, L.
name: Schoelkopf, R. J.
name: Devoret, M. H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Dispersive readouts for superconducting qubits have the advantage of speed and minimal invasiveness. We have developed such an amplifier, the Cavity Bifurcation Amplifier (CBA) [10], and applied it to the readout of the quantronium qubit [2]. It consists of a Josephson junction embedded in a microwave on-chip resonator. In contrast with the Josephson bifurcation amplifier [17], which has an on-chip capacitor shunting a junction, the resonator is based on a simple coplanar waveguide imposing a pre-determined frequency and whose other RF characteristics like the quality factor are easily controlled and optimized. Under proper microwave irradiation conditions, the CBA has two metastable states. Which state is adopted by the CBA depends on the state of a quantronium qubit coupled to the CBA's junction. Due to the MHz repetition rate and large signal to noise ratio we can show directly that the coherence is limited by 1/f gate charge noise when biased at the sweet spot - a point insensitive to first order gate charge fluctuations. This architecture lends itself to scalable quantum computing using a multi-resonator chip with multiplexed readouts.
description: 6 pages, 5 figures To be published in Physical Review B
Monetary and Multidimensional Poverty: Correlation, Mismatches, and a Combined Approach
Creators: name: Evans, Martin
name: Nogales, Ricardo
name: Robson, Matthew
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Science Policy
subject: Computational Biology

description: We consider the relationships between multidimensional and monetary poverty indices in international and national poverty profiles, and empirically explore the consequences of identifying poor people relying on a combination of both approaches. Taking first a cross-country perspective, focusing on 90 countries in the developing world, we corroborate that the incidence of poverty by money metrics and the global Multidimensional Poverty Index, a non-monetary measure of poverty, are correlated. Digging deeper, we use microdata from six countries—Bolivia, Brazil, Ecuador, Ethiopia, Ghana, and Uganda—to study the joint densities of monetary and multidimensional welfare and the poverty identification mismatches for a comprehensive array of poverty line pairs. Mismatches are important, particularly in the poorer countries. Although mismatches could be avoided by combining both approaches in a dual cutoff-based poverty measure, the choice of the monetary poverty line remains a considerable issue as it changes the nonmonetary composition of poverty.
A Novel Approach to Study Highly Correlated Nanostructures: The Logarithmic Discretization Embedded Cluster Approximation
Creators: name: Anda, E. V.
name: Chiappe, G.
name: Busser, C. A.
name: Davidovich, M. A.
name: Martins, G. B.
name: Heidrich-Meisner, F.
name: Dagotto, E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: This work proposes a new approach to study transport properties of highly correlated local structures. The method, dubbed the Logarithmic Discretization Embedded Cluster Approximation (LDECA), consists of diagonalizing a finite cluster containing the many-body terms of the Hamiltonian and embedding it into the rest of the system, combined with Wilson's idea of a logarithmic discretization of the representation of the Hamiltonian. The physics associated with both one embedded dot and a double-dot side-coupled to leads is discussed in detail. In the former case, the results perfectly agree with Bethe ansatz data, while in the latter, the physics obtained is framed in the conceptual background of a two-stage Kondo problem. A many-body formalism provides a solid theoretical foundation to the method. We argue that LDECA is well suited to study complicated problems such as transport through molecules or quantum dot structures with complex ground states.
description: 17 pages, 13 figures
Analytic non-Abelian gravitating solitons in the Einstein-Yang-Mills-Higgs theory and transitions between them
Creators: name: Canfora, Fabrizio
name: Oh, Seung Hun
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Two analytic examples of globally regular non-Abelian gravitating solitons in the Einstein-Yang-Mills-Higgs theory in (3+1)-dimensions are presented. In both cases, the space-time geometries are of the Nariai type and the Yang-Mills field is completely regular and of meron type (namely, proportional to a pure gauge). However, while in the first family (type I) $X_{0} = 1/2$ (as in all the known examples of merons available so far) and the Higgs field is trivial, in the second family (type II) $X_{0}$ is not 1/2 and the Higgs field is non-trivial. We compare the entropies of type I and type II families determining when type II solitons are favored over type I solitons: the VEV of the Higgs field plays a crucial role in determining the phases of the system. The Klein-Gordon equation for test scalar fields coupled to the non-Abelian fields of the gravitating solitons can be written as the sum of a two-dimensional D'Alembert operator plus a Hamiltonian which has been proposed in the literature to describe the four-dimensional Quantum Hall Effect (QHE): the difference between type I and type II solutions manifest itself in a difference between the degeneracies of the corresponding energy levels.
description: 18 pages, 9 figures
Axions and Anomaly-Mediated Interactions: The Green-Schwarz and Wess-Zumino Vertices at Higher Orders and g-2 of the muon
Creators: name: Armillis, Roberta
name: Coriano', Claudio
name: Guzzi, Marco
name: Morelli, Simone
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a study of the mechanism of anomaly cancellation using only transverse invariant amplitudes on anomaly diagrams at higher perturbative orders. The method is the realization of the Green-Schwarz (GS) mechanism at field theory level, which restores the Ward identities by a subtraction of the anomaly pole. Some of the properties of the GS vertex are analyzed both in the context of unitarity and of the organization of the related perturbative expansion. We investigate the role played by the GS and the Wess-Zumino vertices in the anomalous magnetic moment of the muon and in the hyperfine splitting of muonium, which are processes that can be accompanied by the exchange of a virtual anomalous extra Z-prime and an axion-like particle.
description: 51 Pages, 31 Figures, Revised final version to appear on JHEP
$^1$H-NMR Study of the Random Bond Effect in the Quantum Spin System (CH$_3$)$_2$CHNH$_3$Cu(Cl$_x$Br$_{1-x}$)$_3$
Creators: name: Adachi, T.
name: Kanada, K.
name: Saito, T.
name: Oosawa, A.
name: Goto, T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Spin-lattice relaxation rate $T_1^{-1}$ of $^1$H-NMR has been measured in (CH$_3$)$_2$CHNH$_3$Cu(Cl$_x$Br$_{1-x}$)$_3$ with $x=0.88$, which has been reported to be gapped system with singlet ground state from the previous macroscopic magnetization and specific heat measurements, in order to investigate the bond randomness effect microscopically in the gapped composite Haldane system (CH$_3$)$_2$CHNH$_3$CuCl$_3$. It was found that the spin-lattice relaxation rate $T_1^{-1}$ in the present system includes both fast and slow relaxation parts indicative of the gapless magnetic ground state and the gapped singlet ground state, respectively. We discuss the obtained results with the previous macroscopic magnetization and specific heat measurements together with the microscopic $μ$SR experiments.
description: 4 pages, 2 figures, to be published in J. Phys. Soc. Jpn. vol.76 (2007) No.8
Cuando el progresismo se obsesiona con el  desarrollismo: la falacia del ambientalismo bobo y  el extractivismo inteligente
Creators: name: Gudynas, Eduardo
Publisher: name: CLAES
Year: 2024
Subjects: politics

description: Un examen de las respuestas a la irrupción de la extrema derecha basado en la defensa de un progresismo extractivista, como argumenta el argentino José Natanson, desnuda una economía política contradictoria, una renovación bloqueada y una política que se erosiona. Es, a fin de cuentas, una posición que a pesar de su discurso corre el riesgo de ser funcional a esa ultraderecha.
Space-filling models of the ethylene molecule
Creators: name: Chen, Junjie
Publisher: name: figshare
Year: 2022
Subjects: subject: 30606 Structural Chemistry and Spectroscopy
subject: FOS: Chemical sciences

description: Ethylene is widely used in the chemical industry, and its worldwide production exceeds that of any other organic compound. Much of this production goes toward polyethylene, a widely used plastic containing polymer chains of ethylene units in various chain lengths. Ethylene is the starting material for the preparation of a number of two-carbon compounds including ethanol (industrial alcohol), ethylene oxide (converted to ethylene glycol for antifreeze and polyester fibres and films), acetaldehyde (converted to acetic acid), and vinyl chloride (converted to polyvinyl chloride). In addition to these compounds, ethylene and benzene combine to form ethylbenzene, which is dehydrogenated to styrene for use in the production of plastics and synthetic rubber. Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com, Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China
Statistical properties of the linear tidal shear
Creators: name: Desjacques, Vincent
name: Smith, Robert E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Large-scale structures originate from coherent motions induced by inhomogeneities in the primeval gravitational potential. Here, we investigate the two-point statistics of the second derivative of the potential, the tidal shear, under the assumption of Gaussianity. We derive an exact closed form expression for the angular averaged, two-point distribution of the shear components which is valid for an arbitrary Lagrangian separation. This result is used to write down the two-point statistics of the shear eigenvalues in compact form. Next, we examine the large-scale asymptotics of the correlation of the shear eigenvalues, and the alignment of the principal axes. The analytic results are in good agreement with measurements obtained from random realizations of the gravitational potential. Finally, we show that a number of two-point distributions of the shear eigenvalues are well approximated by Gaussian bivariates over a wide range of separation and smoothing scales. We speculate that the Gaussian approximation also holds for multiple point distributions of the shear eigenvalues. It is hoped that these results will be relevant for studies aimed at describing the properties of the (evolved) matter distribution in terms of the statistics of the primordial shear field.
description: 13 pages, 6 figures. Matches version published in PRD
Local lettuce: heat tolerant romaine cultivars and vermicompost soil amendment to increase sustainability in the Mid-Atlantic
Creators: name: Wallis, Anna Elizabeth
Publisher: name: Digital Repository at the University of Maryland
Year: 2014
Subjects: subject: Plant sciences
subject: Horticulture
subject: compost
subject: lactuca sativa
subject: lettuce
subject: local agriculture
subject: sustainability
subject: vermicompost

description: Local production of lettuce in the Mid-Atlantic utilizing heat-tolerant romaine cultivars and vermicompost soil amendment has the potential to significantly increase sustainability of agriculture. Heat tolerant cultivars would facilitate season extension into the summer. Vermicompost, compost produced using earthworms, may increase yield and quality of lettuce crops. This research tested a system incorporating these two practices. Success was assessed on lettuce yield and quality of lettuce across three seasons (spring, summer, and fall) and food safety risk of vermicompost. Several of the heat tolerant cultivars showed marketing potential when grown in the summer. Vermicompost did not significantly increase lettuce performance, but trends indicate that it may help, especially at higher rates. No food safety risk was associated with tested materials.
Bleeding at the Margins: Understanding Period Poverty among SC and ST Women Using Decomposition Analysis
Creators: name: Babbar, Karan
name: Vandana
name: Arora, Ashu
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Evolutionary Biology
subject: Environmental Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences

description: Scheduled Caste (SC) and Scheduled Tribe (ST) women in India have relatively lower usage of period products than women of the General category. This paper attempts to understand and uncover the social factors explaining inequalities in the period product usage among these groups. This paper uses data from the National Family Health Survey (NFHS-5), conducted in 2019–21, for this study, with a sample of 49,136 SC, 44,392 ST, and 41,045 General caste women in the age group of 15 to 24 years. Using the Fairlie decomposition method, we explain the inequalities in the period product usage between SC, ST, and general categories. Differences in wealth index (SC-Gen: 49.54%; ST-Gen: 46.6%), respondent’s education level (SC-Gen: 22.85%; ST-Gen: 17.3%), watching television (SC-Gen: 09.44%; ST-Gen: 10.1%), reading newspaper (SC-Gen: 08.71%; ST-Gen: 05.09%), and toilet facility (SC-Gen: 06.36%; ST-Gen: 03.05%) account for a large portion of the gap in the period product usage among these groups. Government, policymakers, and NGOs should focus on creating comprehensive menstrual health and hygiene (MHH) programmes, including educational programmes and mass media campaigns, while increasing focus on disadvantaged communities, viz. SCs and STs to make the necessary nudge for girls and women to adopt hygienic menstrual practices.
Copies of a one-ended group in a Mapping Class Group
Creators: name: Dahmani, Francois
name: Fujiwara, Koji
Publisher: name: arXiv
Year: 2007
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics

description: We establish that, given $Σ$ a compact orientable surface, and $G$ a finitely presented one-ended group, the set of copies of $G$ in the mapping class group $\mathcal{MCG}(Σ)$ consisting of only pseudo-anosov elements except identity, is finite up to conjugacy. This relies on a result of Bowditch on the same problem for images of surfaces groups. He asked us whether we could reduce the case of one-ended groups to his result ; this is a positive answer. Our work involves analogues of Rips and Sela canonical cylinders in curve complexes, and the argument of Delzant to bound the number of images of a one-ended group in a hyperbolic group.
description: 16 pages, 3 figures, revised
Persistent Agricultural Shocks and Child Poverty
Creators: name: Miller, Ray
name: Mudenda, Lackson D.
name: Sedai, Ashish K.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: Medicine
Neuroscience
Biotechnology
Biological Sciences not elsewhere classified
Science Policy

description: This study shows how persistent agricultural shocks in Ethiopia affect education, health and labor outcomes through a time-use study of young people aged 5-22. Leveraging five rounds of the Young Lives Study from 2002-2016, we use dynamic panel instrumental variable regressions to account for the unobserved heterogeneity and serial correlation in the estimation. Agricultural shocks significantly reduce schooling participation and time spent in schooling, deteriorate health, and increase both labor force participation and labor time. Household wealth acts as a buffer and mitigates the adverse effects of shocks on schooling. Interestingly, children from wealthier households have a higher likelihood of joining agricultural labor during shocks, but their intensity of child labor is significantly lower compared to poorer households.
Exact Heisenberg operator solutions for multi-particle quantum mechanics
Creators: name: Odake, Satoru
name: Sasaki, Ryu
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Exact Heisenberg operator solutions for independent `sinusoidal coordinates' as many as the degree of freedom are derived for typical exactly solvable multi-particle quantum mechanical systems, the Calogero systems based on any root system. These Heisenberg operator solutions also present the explicit forms of the annihilation-creation operators for various quanta in the interacting multi-particle systems. At the same time they can be interpreted as multi-variable generalisation of the three term recursion relations for multi-variable orthogonal polynomials constituting the eigenfunctions.
description: 17 pages, no figures
The Reproduction of Inequalities through Educational Aspirations: Evidence from Teenagers in India
Creators: name: Flechtner, Svenja
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Science Policy
subject: Plant Biology
subject: FOS: Biological sciences

description: This paper studies educational aspirations and grade achievements of teenagers in India, using Structural Equation Modelling with data from the Young Lives Study. The analysis differentiates direct effects of relevant socio-economic and individual characteristics on educational output from indirect effects through aspirations. In this sample, some student characteristics – parents’ education, mothers’ caste and the student’s gender – have no direct effect on educational output, but an indirect effect on educational aspirations going through abilities. Students from disadvantaged backgrounds, and in particular girls, are at a disadvantage at age 12 because they have accumulated lower cognitive abilities. Abilities shape aspirations, which then impact educational output beyond the mere effect of abilities. Girls are at a double disadvantage: besides lower average skills at age 12, they developed lower aspirations than boys of the same characteristics. The economic situation of the household was neither directly nor indirectly related with students’ achievements in school. These results help distinguish aspirations as drivers of behaviour from aspirations as correlates of other characteristics, and they have relevant policy implications.
How are Lyman $α$ absorbers in the cosmic web related to gas-rich galaxies?
Creators: name: Borthakur, Sanchayeeta
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the two-point cross-correlation function between Lyman $α$ absorbers and HI galaxies in the nearby Universe ($0.01 \le z \le 0.057$). We use absorbers from 21 QSO sightlines from the Survey of the Low-Redshift Intergalactic Medium with HST/COS and the galaxy catalogs from the Arecibo Legacy Fast ALFA survey and the New York University Value-Added Galaxy Catalog. We find that Lyman $α$ absorbers are strongly correlated to Lyman $α$ galaxies at a projected separation of $\le$0.5 Mpc and velocity separation of $\le 50~km~s^{-1}$. Lyman $α$ absorbers are 7.6 times more likely to be found near HI galaxies compared to a random distribution. The correlation decreases as the projected and/or velocity separation increase. We also find the correlation between Lyman $α$ absorbers and HI galaxies to be stronger than those observed between Lyman $α$ absorbers and optically selected galaxies. There is an enhancement in the number of absorbers at velocity separations of $\le30~km~s^{-1}$ from HI galaxies at distances larger than their viral radius. Combined with the fact that most of our galaxies are not driving strong outflows, we conclude that the absorbers at low-velocity separations are tracing cooler intergalactic gas around galaxies. This conclusion is consistent with the predictions from cosmological simulations where faint gas from the intergalactic medium flows into the disks of galaxies leading to galaxy growth.
description: 10 pages, 5 figures, accepted for publication in ApJ
Breakdown of large-N quenched reduction in SU(N) lattice gauge theories
Creators: name: Bringoltz, Barak
name: Sharpe, Stephen R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the validity of the large-N equivalence between four-dimensional SU(N) lattice gauge theory and its momentum quenched version--the Quenched Eguchi-Kawai (QEK) model. We find that the assumptions needed for the proofs of equivalence do not automatically follow from the quenching prescription. We use weak-coupling arguments to show that large-N equivalence is in fact likely to break down in the QEK model, and that this is due to dynamically generated correlations between different Euclidean components of the gauge fields. We then use Monte-Carlo simulations at intermediate couplings with 20 <= N <= 200 to provide strong evidence for the presence of these correlations and for the consequent breakdown of reduction. This evidence includes a large discrepancy between the transition coupling of the "bulk" transition in lattice gauge theories and the coupling at which the QEK model goes through a strongly first-order transition. To accurately measure this discrepancy we adapt the recently introduced Wang-Landau algorithm to gauge theories.
description: 51 pages, 16 figures, Published verion. Historical inaccuracies in the review of the quenched Eguchi-Kawai model are corrected, discussion on reduction at strong-coupling added, references updated, typos corrected. No changes to results or conclusions
Machine-actionable Data Management Plans
Creators: name: Oblasser, Simon
name: Miksa, Tomasz
Publisher: name: Zenodo
Year: 2019
Subjects: Open Science
Japan Open Science Summit
JOSS2019
machine-actionable DMP
Research Data Management

description: This presentation was held at the Japan Open Science Summit (DMP session) on 28 May 2019, Tokyo. The goal of the presentation is to show how machine-actionability can improve the quality of DMPs and enable a whole range of new use cases. Parts of the work being presented were created during the National Institute of Informatics (NII) International Internship Program at Kitamoto Lab.
Improving application performance with biased distributions of quantum states
Creators: name: Lohani, Sanjaya
name: Lukens, Joseph M.
name: Jones, Daniel E.
name: Searles, Thomas A.
name: Glasser, Ryan T.
name: Kirby, Brian T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We consider the properties of a specific distribution of mixed quantum states of arbitrary dimension that can be biased towards a specific mean purity. In particular, we analyze mixtures of Haar-random pure states with Dirichlet-distributed coefficients. We analytically derive the concentration parameters required to match the mean purity of the Bures and Hilbert--Schmidt distributions in any dimension. Numerical simulations suggest that this value recovers the Hilbert--Schmidt distribution exactly, offering an alternative and intuitive physical interpretation for ensembles of Hilbert--Schmidt-distributed random quantum states. We then demonstrate how substituting these Dirichlet-weighted Haar mixtures in place of the Bures and Hilbert--Schmidt distributions results in measurable performance advantages in machine-learning-based quantum state tomography systems and Bayesian quantum state reconstruction. Finally, we experimentally characterize the distribution of quantum states generated by both a cloud-accessed IBM quantum computer and an in-house source of polarization-entangled photons. In each case, our method can more closely match the underlying distribution than either Bures or Hilbert--Schmidt distributed states for various experimental conditions.
description: 16 pages, 15 figures
Why Should we Integrate Income and Employment Support? A Conceptual and Empirical Investigation
Creators: name: Asenjo, Antonia
name: Escudero, Verónica
name: Liepmann, Hannah
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Mathematical Sciences not elsewhere classified
subject: Cancer
subject: Science Policy
subject: Computational Biology

description: The integration of active labour market policies within income support schemes – such as unemployment insurance and social assistance – has been a key component of social protection in high-income countries since the 1990s, with a rich literature reviewing its effects and implementation characteristics. Today, although this approach has become prevalent in many middle-income economies, its conceptual and practical application has not been studied in detail outside of high-income countries. This paper conceptualizes, for the first time, the implementation of integrated approaches, focusing on low- and middle-income countries (LMIC). We first develop a conceptual framework to understand how integrated policies can address labour market challenges, exploring the theoretical effects they exert on selected labour market and social dimensions. We then contrast these theoretical expectations with findings from the empirical literature on the effectiveness of integrated approaches. While many empirical studies find positive effects across different labour market dimensions, this is not a universal finding. To reconcile this discrepancy, we investigate the design and implementation of integrated approaches across LMIC and identify factors which contribute to their effectiveness.
Generating mixtures of spatial qubits
Creators: name: Lima, G.
name: Torres-Ruiz, F. A.
name: Neves, L.
name: Delgado, A.
name: Saavedra, C.
name: Padua, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In a recent letter [Phys. Rev. Lett. 94, 100501 (2005)], we presented a scheme for generating pure entangled states of spatial qudits ($D$-dimensional quantum systems) by using the momentum transverse correlation of the parametric down-converted photons. In this work we discuss a generalization of this process to enable the creation of mixed states. With the technique proposed we experimentally generated a mixture of two spatial qubits.
description: To appear in Optics Communications
Characterization of topological states on a lattice with Chern number
Creators: name: Hafezi, Mohammad
name: Sorensen, Anders S.
name: Lukin, Mikhail D.
name: Demler, Eugene
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study Chern numbers to characterize the ground state of strongly interacting systems on a lattice. This method allows us to perform a numerical characterization of bosonic fractional quantum Hall (FQH) states on a lattice where conventional overlap calculation with known continuum case such as Laughlin state, breaks down due to the lattice structure or dipole-dipole interaction. The non-vanishing Chern number indicates the existence of a topological order in the degenerate ground state manifold.
description: 5 pages, 3 figures, V2: changes in the presentation
Path-Integral Treatment of Quantum Bouncers
Creators: name: Loh, Yen Lee
name: Gan, Chee Kwan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The one-sided bouncer and the symmetric bouncer involve a one-dimensional particle in a piecewise linear potential. For such problems, the time-dependent quantum mechanical propagator cannot be found in closed form. The semiclassical Feynman path integral is a very appealing approach, as it approximates the propagator by a closed-form expression (a sum over a finite number of classical paths). In this paper we solve the classical path enumeration problem. We obtain closed-form expressions for the initial velocity, bounce times, focal times, action, van Vleck determinant, and Morse index for each classical path. We calculate the propagator within the semiclassical approximation. The numerical results agree with eigenfunction expansion results away from caustics. We derive mappings between the one-sided bouncer and symmetric bouncer, which explains why each bounce of the one-sided bouncer increases the Morse index by 2 and results in a phase change of $π$. We interpret the semiclassical Feynman path integral to obtain visualizations of matter wave propagation based on interference between classical paths, in analogy with the traditional visualization of light wave propagation as interference between classical ray paths.
description: 21 pages. 14 figures
Appropriate SCF basis sets for orbital studies of galaxies and a `quantum-mechanical' method to compute them
Creators: name: Kalapotharakos, Constantinos
name: Efthymiopoulos, Christos
name: Voglis, Nikos
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We address the question of an appropriate choice of basis functions for the self-consistent field (SCF) method of simulation of the N-body problem. Our criterion is based on a comparison of the orbits found in N-body realizations of analytical potential-density models of triaxial galaxies, in which the potential is fitted by the SCF method using a variety of basis sets, with those of the original models. Our tests refer to maximally triaxial Dehnen gamma-models for values of $γ$ in the range 0<=gamma<=1. When an N-body realization of a model is fitted by the SCF method, the choice of radial basis functions affects significantly the way the potential, forces, or derivatives of the forces are reproduced, especially in the central regions of the system. We find that this results in serious discrepancies in the relative amounts of chaotic versus regular orbits, or in the distributions of the Lyapunov characteristic exponents, as found by different basis sets. Numerical tests include the Clutton-Brock and the Hernquist-Ostriker (HO) basis sets, as well as a family of numerical basis sets which are `close' to the HO basis set. The family of numerical basis sets is parametrized in terms of a quantity $ε$ which appears in the kernel functions of the Sturm-Liouville (SL) equation defining each basis set. The HO basis set is the $ε=0$ member of the family. We demonstrate that grid solutions of the SL equation yielding numerical basis sets introduce large errors in the variational equations of motion. We propose a quantum-mechanical method of solution of the SL equation which overcomes these errors. We finally give criteria for a choice of optimal value of $ε$ and calculate the latter as a function of the value of gamma.
description: 22 pages, 13 figures, Accepted in MNRAS
Hartree-Fock-Bogoliubov Theory of Polarized Fermi Systems
Creators: name: Bertsch, George
name: Dobaczewski, Jacek
name: Nazarewicz, Witold
name: Pei, Junchen
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Condensed Fermi systems with an odd number of particles can be described by means of polarizing external fields having a time-odd character. We illustrate how this works for Fermi gases and atomic nuclei treated by density functional theory or Hartree-Fock-Bogoliubov (HFB) theory. We discuss the method based on introducing two chemical potentials for different superfluid components, whereby one may change the particle-number parity of the underlying quasiparticle vacuum. Formally, this method is a variant of non-collective cranking, and the procedure is equivalent to the so-called blocking. We present and exemplify relations between the two-chemical-potential method and the cranking approximation for Fermi gases and nuclei.
description: 11 RevTeX pages, 4 figures, submitted to Physical Review A, extended version
Gryllus locorojo or Gryllus assimilis? – PCR-based differentiation of two commonly confused crickets for pet and livestock feeding
Creators: name: König, F.
name: Zagon, J.
name: Garino, C.
name: Winkel, M.
Publisher: name: Brill Online
Year: 2025
Subjects: classificationCode: 309999
subject: Other agricultural, veterinary and food sciences not elsewhere classified

description: A real-time polymerase chain reaction (PCR)-based protocol (Gloco-PCR) was validated to specifically detect Gryllus locorojo, a Gryllus species on the European market often mistaken for Gryllus assimilis. Whereas the latter species is allowed in the EU for feeding farmed animals, G. locorojo is only permitted for pets according to the current legislation. The method was developed on the basis of the cytochrome oxidase I gene, (COI), which was sequenced with thoroughly characterised G. locorojo and G. assimilis samples. The method is highly sensitive, detecting 0.8 pg G. locorojo-DNA or 0.1% G. locorojo incurred in feed, respectively. Authentic G. assimilis specimens were used to ensure that the G. locorojo method (Gloco-PCR) discriminates this closely related sister taxon, with a comfortable Ct-difference of 10-15. For cross analysis of true G. assimilis, similar primers with another probe were employed (Gassim-PCR) and the annealing temperature was increased from 60 °C to 62 °C. Under these conditions, authentic G. assimilis crickets were detectable with Ct-values around 20, while G. locorojo samples showed a low detection at cycles around Ct 35. An investigation of ten ‘G. assimilis’ samples collected from Germany and four other European countries revealed that all of them were of the G. locorojo type. This proves the usefulness of our approach and supports the assumption that many G. assimilis crickets marketed in the EU indeed belong to the species G. locorojo. Consequently, European legislation, currently based on a white list of allowed insect species, is critically questioned.
High Resolution X-Ray Imaging of the Center of IC342
Creators: name: Mak, Daisy S. Y.
name: Pun, Chun. S. J.
name: Kong, Albert K. H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We presented the result of a high resolution (FWHM~0.5'') 12 ks Chandra HRC-I observation of the starburst galaxy IC342 taken on 2 April 2006. We identified 23 X-ray sources within the central 30' x 30' region of IC342. Our HRC-I observation resolved the historical Ultraluminous X-ray sources (ULX), X3, near the nucleus into 2 sources, namely C12 and C13, for the first time. The brighter source C12, with L(0.08-10keV)=(6.66\pm0.45)\times10^{38}ergs^-1, was spatially extended (~82 pc x 127 pc). From the astrometric registration of the X-ray image, C12 was at R.A.=03h:46m:48.43s, decl.=+68d05m47.45s, and was closer to the nucleus than C13. Thus we concluded that source was not an ULX and must instead be associated with the nucleus. The fainter source C13, with L(0.08-10keV)=(5.1\pm1.4) x 10^{37}ergs^-1 was consistent with a point source and located $6.51'' at P.A. 240 degree of C12. We also analyzed astrometrically corrected optical Hubble Space Telescope and radio Very Large Array images, a comparison with the X-ray image showed similarities in their morphologies. Regions of star formation within the central region of IC342 were clearly visible in HST H alpha image and this was the region where 3 optical star clusters and correspondingly our detected X-ray source C12 were observed. We found that a predicted X-ray emission from starburst was very close to the observed X-ray luminosity of C12, suggesting that nuclear X-ray emission in IC342 was dominated by starburst. Furthermore, we discussed the possibility of AGN in the nucleus of IC342. Although our data was not enough to give a firm existence of an AGN, it could not be discarded.
description: 29 page, 8 figures, accepted by ApJ
Determining effective permeability at reservoir scale: Numerical simulations and theoretical modeling
Creators: name: Adeyemi, Barnabas
name: Ghanbarian, Behzad
name: Winter, C. L.
name: King, Peter R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Determining the effective permeability (keff) of geological formations has broad applications to site remediation, aquifer discharge or recharge, hydrocarbon production, and enhanced oil recovery. The objectives of this study are: (1) to explore an approach to estimating keff at the reservoir scale using the critical path analysis (CPA), (2) to evaluate the accuracy of this new approach by comparing the estimated keff to the numerically simulated effective permeability, and (3) to compare the performance of CPA estimates of keff to estimates by three other models i.e., perturbation theory (PT), effective-medium approximation (EMA), and renormalization group theory (RGT). We construct two- and three-dimensional random (uncorrelated) geologic formations based on permeability measurements from the Borden site and assume that the permeability distribution conforms to the log-normal probability density function over a wide range of means and standard deviations. Comparing keff estimated via CPA to keff values derived from numerical flow simulations indicates that CPA provides accurate estimations in both two and three dimensions over a wide range of heterogeneity levels, similar to RGT. Inter-model comparisons show that although PT and EMA provide reasonable keff estimations in rather homogeneous formations, they substantially overestimate the effective permeability in highly heterogeneous formations.
Elation generalised quadrangles of order (s,p), where p is prime
Creators: name: Bamberg, John
name: Penttila, Tim
name: Schneider, Csaba
Publisher: name: arXiv
Year: 2007
Subjects: subject: Combinatorics (math.CO)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 51E12

description: We show that an elation generalised quadrangle which has p+1 lines on each point, for some prime p, is classical or arises from a flock of a quadratic cone (i.e., is a flock quadrangle).
description: 14 pages
ПРОФИЛАКТИКА  ИНСПЕКТОРИНИНГ  МИЛЛИЙ ГВАРДИЯ ҚЎРИҚЛАШ ХИЗМАТИБИЛАН ҲУҚУҚБУЗАРЛИКЛАР ПРОФИЛАКТИКАСИ ФАОЛИЯТИНИ АМАЛГА ОШИРИШДА ЎЗАРО ҲАМКОРЛИГИ ВА УНИНГ АҲАМИЯТИ
Creators: name: Зиёдуллаева, Наргиза
name: Ниматов, Шерзод
Publisher: name: Zenodo
Year: 2025

description: Жамоат хавфсизлигини таъминлаш, ҳуқуқбузарликларнинг олдини олиш ва жиноятчиликка қарши курашишнинг яхлит тизимини шакллантириш, ички ишлар органларининг энг қуйи бўғинидан республика даражасигача самарали фаолиятини йўлга қўйиш ва замонавий иш услубларини жорий этиш орқали мамлакатимизда ҳуқуқ-тартибот ва қонунийликни мустаҳкамлаш, аҳолининг тинчлиги ва осойишталигини таъминлаш мақсадида бугунги кунда кўплаб ислоҳотлар амалга оширилмоқда. Жамиятимизда  мавжуд  ўта  ноёб,  бетакрор  ижтимоий  бошқарув  идораси  бўлган,  ҳеч  нарса билан солиштириб бўлмайдиган, юз йиллар давомида ривожланиб келаётган ва мустақиллик даврида тубдан янгиланиб, замон талаблари асосида такомиллашиб бораётган маҳалла тизими имкониятларини  тўлиқ  ишга  солиш  ва  аҳоли  фаоллигини  ошириш  жиноятларнинг  олдини олишда,  албатта,  ўз  самарасини  беради,, ана  шу  меросдан  амалиётда  моҳирлик  билан фойдаланиш зарур
Density of states of disordered graphene
Creators: name: Hu, Ben Yu-Kuang
name: Hwang, E. H.
name: Sarma, S. Das
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We calculate the average single particle density of states in graphene with disorder due to impurity potentials. For unscreened short-ranged impurities, we use the non-self-consistent and self-consistent Born and $T$-matrix approximations to obtain the self-energy. Among these, only the self-consistent $T$-matrix approximation gives a non-zero density of states at the Dirac point. The density of states at the Dirac point is non-analytic in the impurity potential. For screened short-ranged and charged long-range impurity potentials, the density of states near the Dirac point typically increases in the presence of impurities, compared to that of the pure system.
description: 8 pages, 5 figures
TNQMetro: Tensor-network based package for efficient quantum metrology computations
Creators: name: Chabuda, Krzysztof
name: Demkowicz-Dobrzanski, Rafal
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: TNQMetro is a numerical package written in Python for calculations of fundamental quantum bounds on measurement precision. Thanks to the usage of the tensor-network formalism it can beat the curse of dimensionality and provides an efficient framework to calculate bounds for finite size system as well as determine the asymptotic scaling of precision in systems where quantum enhancement amounts to a constant factor improvement over the Standard Quantum Limit. It is written in a user-friendly way so that the basic functions do not require any knowledge of tensor networks.