cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Correlation, doping and interband effects on the optical conductivity of iron superconductors
Creators: name: Calderón, M. J.
name: Medici, L. de'
name: Valenzuela, B.
name: Bascones, E.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Electronic interactions in multiorbital systems lead to non-trivial features in the optical spectrum. In iron superconductors the Drude weight is strongly suppressed with hole-doping. We discuss why the common association of the renormalization of the Drude weight with that of the kinetic energy, used in single band systems, does not hold in multi-orbital systems. This applies even in a Fermi liquid description when each orbital is renormalized differently, as it happens in iron superconductors. We estimate the contribution of interband transitions at low energies. We show that this contribution is strongly enhanced by interactions and dominates the coherent part of the spectral weight in hole-doped samples at frequencies currently used to determine the Drude weight.
description: 5 pages, 3 figures, as accepted in Phys. Rev. B
Correlation between morphology and transport properties of quasi-free-standing monolayer graphene
Creators: name: Murata, Yuya
name: Mashoff, Torge
name: Takamura, Makoto
name: Tanabe, Shinichi
name: Hibino, Hiroki
name: Beltram, Fabio
name: Heun, Stefan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigate the morphology of quasi-free-standing monolayer graphene (QFMLG) formed at several temperatures by hydrogen intercalation and discuss its relationship with transport properties. Features corresponding to incomplete hydrogen intercalation at the graphene-substrate interface are observed by scanning tunneling microscopy on QFMLG formed at 600 and 800°C. They contribute to carrier scattering as charged impurities. Voids in the SiC substrate and wrinkling of graphene appear at 1000°C, and they decrease the carrier mobility significantly.
A keV String Axion from High Scale Supersymmetry
Creators: name: Henning, Brian
name: Kehayias, John
name: Murayama, Hitoshi
name: Pinner, David
name: Yanagida, Tsutomu T.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Various theoretical and experimental considerations motivate models with high scale supersymmetry breaking. While such models may be difficult to test in colliders, we propose looking for signatures at much lower energies. We show that a keV line in the X-ray spectrum of galaxy clusters (such as the recently disputed 3.5 keV observation) can have its origin in a universal string axion coupled to a hidden supersymmetry breaking sector. A linear combination of the string axion and an additional axion in the hidden sector remains light, obtaining a mass of order 10 keV through supersymmetry breaking dynamics. In order to explain the X-ray line, the scale of supersymmetry breaking must be about $10^{11-12}$ GeV. This motivates high scale supersymmetry as in pure gravity mediation or minimal split supersymmetry and is consistent with all current limits. Since the axion mass is controlled by a dynamical mass scale, this mass can be much higher during inflation, avoiding isocurvature (and domain wall) problems associated with high scale inflation. In an appendix we present a mechanism for dilaton stabilization that additionally leads to $\mathcal{O}(1)$ modifications of the gaugino mass from anomaly mediation.
description: 12 pages with 2 appendices; v2: updates to emphasize general results, other minor updates, matches published version
GGOS Days 2022 Status Report GGOS DACH
Creators: name: Kutterer, Hansjörg
Publisher: name: Zenodo
Year: 2022
Subjects: GGOS, Earth Observation, Geodesy, Space Techniques

description: Activity Report of the GGOS Regional Affiliate GGOS DACH on the occasion of the GGOS Days 2022 in Munich
Time-dependent generalized-active-space configuration-interaction approach to photoionization dynamics of atoms and molecules
Creators: name: Bauch, Sebastian
name: Sørensen, Lasse Kragh
name: Madsen, Lars Bojer
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences
subject: 81-08

description: We present a wave-function based method to solve the time-dependent many-electron Schrödinger equation (TDSE) with special emphasis on strong-field ionization phenomena. The theory builds on the configuration-interaction (CI) approach supplemented by the generalized-active-space (GAS) concept from quantum chemistry. The latter allows for a controllable reduction in the number of configurations in the CI expansion by imposing restrictions on the active orbital space. The method is similar to the recently formulated time-dependent restricted-active-space (TD-RAS) CI method [D. Hochstuhl, and M. Bonitz, Phys. Rev. A 86, 053424 (2012)]. We present details of our implementation and address convergence properties with respect to the active spaces and the associated account of electron correlation in both ground state and excitation scenarios. We apply the TD-GASCI theory to strong-field ionization of polar diatomic molecules and illustrate how the method allows us to uncover a strong correlation-induced shift of the preferred direction of emission of photoelectrons.
description: 22 pages, 13 figures
Leicestershire spas
Creators: name: Bennett, John
Publisher: name: Archaeology Data Service
Year: 2023

description: Leicestershire Historian, 4 (1), 5-9
description: The little known spas of Ashby-de-la-Zouch, Hinckley, Leicester, Belvoir, Burton Lazars, Moira, Nevill Holt, Sapcote and Shearsby.
Leicestershire: a County of Inland Ports
Creators: name: Trubshaw, Robert
Publisher: name: Archaeology Data Service
Year: 2023

description: Leicestershire Historian, 51, 43-47
description: Before bridges, rivers presented significant obstacles to overland travel giving importance to locations where they could be more-or-less reliably forded. Yet, at the same time, rivers were in themselves important routeways - not least when transporting goods which were too heavy or bulky to be easily carried overland. Put these two ideas together and little surprise that places where rivers could be forded became trading places
Atomic filtering for hybrid continuous-variable/discrete-variable quantum optics
Creators: name: Zielińska, Joanna A.
name: Beduini, Federica A.
name: Lucivero, Vito Giovanni
name: Mitchell, Morgan W.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate atomic filtering of frequency-degenerate photon pairs from a sub-threshold optical parametric oscillator (OPO). The filter, a modified Faraday anomalous dispersion optical filter (FADOF), achieves 70% peak transmission simultaneous with 57 dB out-of-band rejection and a 445 MHz transmission bandwidth. When applied to the OPO output, only the degenerate mode, containing one-mode squeezed vacuum, falls in the filter pass-band; all other modes are strongly suppressed. The high transmission preserves non-classical continuous-variable features, e.g. squeezing or non-gaussianity, while the high spectral purity allows reliable discrete-variable detection and heralding. Correlation and atomic absorption measurements indicate a spectral purity of 96% for the individual photons, and 98% for the photon pairs. These capabilities will enable generation of atom-resonant hybrid states, e.g. "Schrödinger kittens" obtained by photon subtraction from squeezed vacuum, making these exotic states available for quantum networking and atomic quantum metrology applications.
description: final version, 11 pages,6 figures
Constraints on ionising photon production from the large-scale Lyman-alpha forest
Creators: name: Pontzen, Andrew
name: Bird, Simeon
name: Peiris, Hiranya
name: Verde, Licia
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Recent work has shown that the z~2.5 Lyman-alpha forest on large scales encodes information about the galaxy and quasar populations that keep the intergalactic medium photoionized. We present the first forecasts for constraining the populations with data from current and next-generation surveys. At a minimum the forest should tell us whether galaxies or, conversely, quasars dominate the photon production. The number density and clustering strength of the ionising sources might be estimated to sub-10% precision with a DESI-like survey if degeneracies (e.g., with the photon mean-free-path, small-scale clustering power normalization and potentially other astrophysical effects) can be broken by prior information. We demonstrate that, when inhomogeneous ionisation is correctly handled, constraints on dark energy do not degrade.
description: Matches version published in ApJL
The Grand Tack model: a critical review
Creators: name: Raymond, Sean N.
name: Morbidelli, Alessandro
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The `Grand Tack' model proposes that the inner Solar System was sculpted by the giant planets' orbital migration in the gaseous protoplanetary disk. Jupiter first migrated inward then Jupiter and Saturn migrated back outward together. If Jupiter's turnaround or "tack" point was at ~1.5 AU the inner disk of terrestrial building blocks would have been truncated at ~1 AU, naturally producing the terrestrial planets' masses and spacing. During the gas giants' migration the asteroid belt is severely depleted but repopulated by distinct planetesimal reservoirs that can be associated with the present-day S and C types. The giant planets' orbits are consistent with the later evolution of the outer Solar System. Here we confront common criticisms of the Grand Tack model. We show that some uncertainties remain regarding the Tack mechanism itself; the most critical unknown is the timing and rate of gas accretion onto Saturn and Jupiter. Current isotopic and compositional measurements of Solar System bodies -- including the D/H ratios of Saturn's satellites -- do not refute the model. We discuss how alternate models for the formation of the terrestrial planets each suffer from an internal inconsistency and/or place a strong and very specific requirement on the properties of the protoplanetary disk. We conclude that the Grand Tack model remains viable and consistent with our current understanding of planet formation. Nonetheless, we encourage additional tests of the Grand Tack as well as the construction of alternate models.
description: 9 pages, 1 figure (updated references)
Leicestershire's First Lost Houses
Creators: name: Bennett, John
Publisher: name: Archaeology Data Service
Year: 2023

description: Leicestershire Historian, 51, 32-35
description: The twentieth century saw the disappearance of large numbers of country houses, particularly during the period between the two World Wars. In Leicestershire there are a number of early examples of houses which, for various reasons, were vacated by their owners, and which subsequently disappeared
Effects of short-range correlation reduced kinetic symmetry energy in heavy-ion collisions at intermediate energies
Creators: name: Li, Bao-An
name: Guo, Wen-Jun
name: Shi, Zhaozhong
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Besides earlier predictions based on both phenomenological models and modern microscopic many-body theories, circumstantial evidence was recently found for a reduced kinetic symmetry energy of isospin-asymmetric nucleonic matter compared to the free Fermi gas model prediction due to the short-range correlation of high-momentum neutron-proton pairs. While keeping the total symmetry energy near the saturation density of nuclear matter consistent with existing experimental constraints, we examine the correspondingly enhanced role of the isospin degree of freedom in heavy-ion collisions at intermediate energies due to the reduced (enhanced) kinetic (potential) symmetry energy. Important observable consequences are investigated.
description: Version accepted by Phys. Rev. C
D9.2 Workshop Series
Creators: name: Baggetto, Marina
Publisher: name: Zenodo
Year: 2022
Subjects: Workshop, communication, dissemination, stakeholders

description: This document is the main document describing in detail the series of workshops related to the HyCool Stakeholder Workshop task (T9.2). The four workshops with the stakeholders involved in HyCool will serve as the basis to the development of the set of needs and market analysis (T8.3). Two of them will be planned, hosted and executed by the partners providing the demo sites. The other two workshops will be strategically timed to facilitate a more targeted stakeholder integration, taking place in large renewable energy events and focusing in specific topics to maximize outreach and impact. Workshops will be overseen by the Work Package leader Comet to ensure consistency and quality and to integrate outputs into the market analysis report.
The minimum jet power and equipartition
Creators: name: Zdziarski, Andrzej A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We derive the minimum power of jets and their magnetic field strength based on their observed non-thermal synchrotron emission. The correct form of this method takes into account both the internal energy in the jet and the ion rest-mass energy associated with the bulk motion. The latter was neglected in a number of papers, which instead adopted the well-known energy-content minimization method. That method was developed for static sources, for which there is no bulk-motion component of the energy. In the case of electron power-law spectra with index >2 in ion-electron jets, the rest-mass component dominates. The minimization method for the jet power taking it into account was considered in some other work, but only based on either an assumption of a constant total synchrotron flux or a fixed range of the Lorentz factors. Instead, we base our method on an observed optically-thin synchrotron spectrum. We find the minimum jet power is independent of its radius when the ion rest-mass power dominates, which becomes the case below certain critical radius. This allows for robust minimum power estimates. We also present results for the case with observed turnover frequency, at which the source becomes optically thick. This method allows a determination of the source size, in addition to the power and the magnetic field. We also point out that when the ion rest-mass power dominates, the estimates of the minimum power lead to very different equipartition parameters than those based on minimization of the energy content. The former and latter lead to approximate equipartition between the internal energy in magnetic field and in particles including and excluding, respectively, their rest mass energy.
description: MNRAS, in press
Single scale factor for the universe from the creation of radiation and matter till the present
Creators: name: Erdem, Recai
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A scheme for incorporating the creation of radiation and matter into the cosmological evolution is introduced so that it becomes possible to merge the times before and after the creation of radiation and matter in a single scale factor in Robertson-Walker metric. This scheme is illustrated through a toy model that has the prospect of constituting a basis for a realistic model.
description: Minor typos are corrected, an acknowledgment is added, to be published in The European Physical Journal C
Efficient dielectric matrix calculations using the Lanczos algorithm for fast many-body $G_0W_0$ implementations
Creators: name: Janssen, Jonathan Laflamme
name: Rousseau, Bruno
name: Côté, Michel
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a $G_0W_0$ implementation that assesses the two major bottlenecks of traditional plane-waves implementations, the summations over conduction states and the inversion of the dielectric matrix, without introducing new approximations in the formalism. The first bottleneck is circumvented by converting the summations into Sternheimer equations. Then, the novel avenue of expressing the dielectric matrix in a Lanczos basis is developed, which reduces the matrix size by orders of magnitude while being computationally efficient. We also develop a model dielectric operator that allows us to further reduce the size of the dielectric matrix without accuracy loss. Furthermore, we develop a scheme that reduces the numerical cost of the contour deformation technique to the level of the lightest plasmon pole model. Finally, the use of the simplified quasi-minimal residual scheme in replacement of the conjugate gradients algorithm allows a direct evaluation of the $G_0W_0$ corrections at the desired real frequencies, without need for analytical continuation. The performance of the resulting $G_0W_0$ implementation is demonstrated by comparison with a traditional plane-waves implementation, which reveals a 500-fold speedup for the silane molecule. Finally, the accuracy of our $G_0W_0$ implementation is demonstrated by comparison with other $G_0W_0$ calculations and experimental results.
description: 19 pages, 2 figures
D.8.1 Report on the standardization landscape and applicable standards
Creators: name: Ortiz de Zárate, Natalia
Publisher: name: Zenodo
Year: 2018
Subjects: Standard, Technical Specification, Workshop Agreement, ISO standards

description: This document collects the information on the state of the art in standardization relevant for HYCOOL. This analysis of the standardization landscape includes the information on the relevant standards (both, published and under-development) and the relevant standardization technical committees. The objective of the deliverable is to provide the consortium with the proper knowledge of the standardization landscape at an early stage in order this information can be taken into account in the development of the different working packages as starting material, facilitating the use of existing knowledge and ensuring the compatibility and the interoperability of the results. It is based in the standardization fields of interest identified by HYCOOL and the subsequent identification and analysis of related standards and standardization technical committees. D8.1 is the first deliverable of the Task 8.1 “Standardization” and will conform the basis for further steps towards the consideration of the results of HYCOOL in future standards contributing to the market acceptance of the developed solutions. The Spanish Association for Standardization, recently called UNE, and previously called AENOR, as National Standardization Body (NSB), member of CEN-CENELEC is member of HYCOOL to provide support regarding the standardization tasks included in the project (WP8-Exploitation, Standardization and Training).
Letters from America
Creators: name: Shepherd, Janette
Publisher: name: Archaeology Data Service
Year: 2023

description: Leicestershire Historian, 4 (4), 17-19
description: The story of their journey of the Ellson family to Avon Ohio and their life there for the next 20 years is chronicled in letters written by John to his brother William Ellson back in Theddingworth. This collection of letters was given to Leicestershire Record Office last year by a relative of the Ellsons and has now been catalogued and made available
Classical dynamics and localization of resonances in the high energy region of the hydrogen atom in crossed fields
Creators: name: Schweiner, Frank
name: Main, Jörg
name: Cartarius, Holger
name: Wunner, Günter
Publisher: name: arXiv
Year: 2014
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: When superimposing the potentials of external fields on the Coulomb potential of the hydrogen atom a saddle point appears, which is called the Stark saddle point. For energies slightly above the saddle point energy one can find classical orbits, which are located in the vicinity of this point. We follow those so-called quasi-Penning orbits to high energies and field strengths observing structural changes and uncovering their bifurcation behavior. By plotting the stability behavior of those orbits against energy and field strength the appearance of a stability apex is reported. A cusp bifurcation, located in the vicinity of the apex, will be investigated in detail. In this cusp bifurcation another orbit of similar shape is found, which becomes completely stable in the observed region of positive energy, i.e., in a region of parameter space, where the Kepler-like orbits located around the nucleus are already unstable. By quantum-mechanically exact calculations we prove the existence of signatures in quantum spectra belonging to those orbits. Husimi distributions are used to compare quantum-Poincaré sections with the extension of the classical torus structure around the orbits. Since periodic orbit theory predicts that each classical periodic orbit contributes an oscillating term to photoabsorption spectra, we finally give an estimation for future experiments, which could verify the existence of the stable orbits.
description: 12 pages, 13 figures, modest revisions in the text
Nanofragmentation as a relaxation mechanism in post deformed solids: molecular-dynamics investigation
Creators: name: Dmitriev A., I.
name: Psakhie S., G.
Publisher: name: Физическая мезомеханика
Year: 2004

description: In the paper the possibility of nanofragmentation of the material in layers near to a free surface at initial stages of relaxation was investigated. Investigations have been carried out by a method of molecular dynamics. It was shown the possibility of off-oriented nanoblocks formation at the initial stage of relaxation. Fragmented structure initially formed in the area of localized deformation near to stress concentrators and then distributed into the material. It was shown that in the area of localized deformation the radial distribution function of atomic density has broad peaks corresponding to peaks of ideal FCC structure and in other part of crystallite there are splitting peaks of FCC structure caused by symmetry disorder due to deformation. With propagation of the area of localized deformation deep into material peak broadness significantly decreases and their location close to corresponded peaks of ideal FCC lattice. The obtained results enable to assume that a possible mechanism of internal stress relaxation in the post-loaded solids is the effect of material nanofragmentation and some off-oriented blocks are separated in the fragmented area.
On detecting oscillations of gamma rays into axion-like particles in turbulent and coherent magnetic fields
Creators: name: Meyer, Manuel
name: Montanino, Daniele
name: Conrad, Jan
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Background radiation fields pervade the Universe, and above a certain energy any $γ$-ray flux emitted by an extragalactic source should be attenuated due to $e^+e^-$ pair production. The opacity could be alleviated if photons oscillated into hypothetical axion-like particles (ALPs) in ambient magnetic fields, leading to a $γ$-ray excess especially at high optical depths that could be detected with imaging air Cherenkov telescopes (IACTs). Here, we introduce a method to search for such a signal in $γ$-ray data and to estimate sensitivities for future observations. Different magnetic fields close to the $γ$-ray source are taken into account in which photons can convert into ALPs that then propagate unimpeded over cosmological distances until they re-convert in the magnetic field of the Milky Way. Specifically, we consider the coherent field at parsec scales in a blazar jet as well as the turbulent field inside a galaxy cluster. For the latter, we explicitly derive the transversal components of a magnetic field with gaussian turbulence which are responsible for the photon-ALP mixing. To illustrate the method, we apply it to a mock IACT array with characteristics similar to the Cherenkov Telescope Array and investigate the dependence of the sensitivity to detect a $γ$-ray excess on the magnetic-field parameters.
description: 31 pages, 9 figures. Published in JCAP
Computer simulation of target penetration on the basis of a combined discrete-continual approach
Creators: name: Chertov M., A.
name: Smolin A. Yu
name: Stefanov Yu, P.
name: Psakhie S., G.
name: Dewu Huan
Publisher: name: Физическая мезомеханика
Year: 2004

description: In the present paper a combined discrete-continual approach proposed in the previous work [1] is applied to simulation of finite thickness steel plate penetration by long tungsten rod. Advantages of this approach for description of penetration, which go from the combination of best properties from a continual numerical method and the discrete numerical method of movable cellular automata (MCA), are discussed and demonstrated by computation of practical problem. In computations the influence of such parameters as impact velocities and plate thickness on penetration process pattern is studied. The dependences of final velocity and rod length as functions of impact velocity and plate thickness are calculated and verified against experimental data. The calculated curves and overall behavior of the simulated system have demonstrated sufficient compliance with experiment, which proves that the proposed approach is effective for description of penetration and other complex dynamic problems.
Evolution of the dust emission of massive galaxies up to z=4 and constraints on their dominant mode of star formation
Creators: name: Béthermin, Matthieu
name: Daddi, Emanuele
name: Magdis, Georgios
name: Lagos, Claudia
name: Sargent, Mark
name: Albrecht, Marcus
name: Aussel, Hervé
name: Bertoldi, Frank
name: Buat, Véronique
name: Galametz, Maud
name: Heinis, Sébastien
name: Karim, Alexander
name: Koekemoer, Anton
name: Lacey, Cedric
name: Floc'h, Emeric Le
name: Navarrete, Felipe
name: Pannella, Maurilio
name: Schreiber, Corentin
name: Symeonidis, Myrto
name: Viero, Marco
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We aim to measure the average dust and molecular gas content of massive star-forming galaxies ($\rm > 3 \times 10^{10}\,M_\odot$) up to z=4 in the COSMOS field to determine if the intense star formation observed at high redshift is induced by major mergers or caused by large gas reservoirs. Firstly, we measured the evolution of the average spectral energy distributions as a function of redshift using a stacking analysis of Spitzer, Herschel, LABOCA, and AzTEC data for two samples of galaxies: normal star-forming objects and strong starbursts, as defined by their distance to the main sequence. We found that the mean intensity of the radiation field $< U >$ heating the dust (strongly correlated with dust temperature) increases with increasing redshift up to z$\sim$4 in main-sequence galaxies. We can reproduce this evolution with simple models that account for the decrease of the gas metallicity with redshift. No evolution of $< U >$ with redshift is found in strong starbursts. We then deduced the evolution of the molecular gas fraction (defined here as $\rm M_{\rm mol}/(M_{\rm mol}+M_\star)$) with redshift and found a similar, steeply increasing trend for both samples. At z$\sim$4, this fraction reaches $\sim$60%. The average position of the main-sequence galaxies is on the locus of the local, normal star-forming disks in the integrated Schmidt-Kennicutt diagram (star formation rate versus mass of molecular gas), suggesting that the bulk of the star formation up to z=4 is dominated by secular processes.
description: 17 pages, 14 figures, 2 tables, accepted by A&A
Gamma-Ray Bursts: Temporal Scales and the Bulk Lorentz Factor
Creators: name: Sonbas, E.
name: MacLachlan, G. A.
name: Dhuga, K. S.
name: Veres, P.
name: Shenoy, A.
name: Ukwatta, T. N.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: For a sample of Swift and Fermi GRBs, we show that the minimum variability timescale and the spectral lag of the prompt emission is related to the bulk Lorentz factor in a complex manner: For small $Γ$'s, the variability timescale exhibits a shallow (plateau) region. For large $Γ$'s, the variability timescale declines steeply as a function of $Γ$ ($δT\proptoΓ^{-4.05\pm0.64}$). Evidence is also presented for an intriguing correlation between the peak times, t$_p$, of the afterglow emission and the prompt emission variability timescale.
description: Accepted for publication in ApJ
Local History and Heritage Groups in Leicestershire - Additions / Amendments
Creators: name: Wessel, Caroline
Publisher: name: Archaeology Data Service
Year: 2023

description: Leicestershire Historian, 45, 59-59
description: The following list of local history and heritage groups in Leicestershire contains additions and amendments that the Society has been notified of since the publication of the list in the Leicestershire Historian No. 44, (2008).
Rings in Random Environments: Sensing Disorder Through Topology
Creators: name: Michieletto, Davide
name: Baiesi, Marco
name: Orlandini, Enzo
name: Turner, Matthew S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this paper we study the role of topology in DNA gel electrophoresis experiments via molecular dynamics simulations. The gel is modelled as a 3D array of obstacles from which half edges are removed at random with probability p, thereby generating a disordered environment. Changes in the microscopic structure of the gel are captured by measuring the electrophoretic mobility of ring polymers moving through the medium, while their linear counterparts provide a control system as we show they are insensitive to these changes. We show that ring polymers provide a novel non-invasive way of exploiting topology to sense microscopic disorder. Finally, we compare the results from the simulations with an analytical model for the non-equilibrium differential mobility, and find a striking agreement between simulation and theory
description: 8 pages,6 figures Accepted for publication in Soft Matter
The 2D $κ$-Dirac oscillator
Creators: name: Andrade, Fabiano M.
name: Silva, Edilberto O.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this Letter, 2D Dirac oscillator in the quantum deformed framework generated by the $κ$-Poincaré-Hopf algebra is considered. The problem is formulated using the $κ$-deformed Dirac equation. The resulting theory reveals that the energies and wave functions of the oscillator are modified by the deformation parameter.
description: 4 pages, 2 figures, Accepted for publication in Physics Letters B
Investigation of high harmonics initiation in surface temperature field under fatigue loading
Creators: name: Plekhov O.
name: Palin-Luc T.
name: Saintier N.
Publisher: name: Физическая мезомеханика
Year: 2004

description: The peculiarities of surface temperature time evolution measured by infrared detector are investigated analytically. Based on the Kelvin equation it is shown that initiation of high harmonics in temperature field can be caused by both energy-determined sources (damage, viscous friction and so on) and artifact sources (motion of specimen surface, painting defect, external heating). The spatial distribution of high harmonics caused by artifact sources for different materials and experimental conditions is determined. The way depending on the investigated material properties to decrease the influence of artifact sources on temperature evolution recorded by infrared camera is proposed.
Multiqubit symmetric states with maximally mixed one-qubit reductions
Creators: name: Baguette, Dorian
name: Bastin, Thierry
name: Martin, John
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a comprehensive study of maximally entangled symmetric states of arbitrary numbers of qubits in the sense of the maximal mixedness of the one-qubit reduced density operator. A general criterion is provided to easily identify whether given symmetric states are maximally entangled in that respect or not. We show that these maximally entangled symmetric (MES) states are the only symmetric states for which the expectation value of the associated collective spin of the system vanishes, as well as in corollary the dipole moment of the Husimi function. We establish the link between this kind of maximal entanglement, the anticoherence properties of spin states, and the degree of polarization of light fields. We analyze the relationship between the MES states and the classes of states equivalent through stochastic local operations with classical communication (SLOCC). We provide a nonexistence criterion of MES states within SLOCC classes of qubit states and show in particular that the symmetric Dicke state SLOCC classes never contain such MES states, with the only exception of the balanced Dicke state class for even numbers of qubits. The 4-qubit system is analyzed exhaustively and all MES states of this system are identified and characterized. Finally the entanglement content of MES states is analyzed with respect to the geometric and barycentric measures of entanglement, as well as to the generalized N-tangle. We show that the geometric entanglement of MES states is ensured to be larger than or equal to 1/2, but also that MES states are not in general the symmetric states that maximize the investigated entanglement measures.
description: 12 pages, 4 figures
Coherent Excitation Transfer in a Spin Chain of Three Rydberg Atoms
Creators: name: Barredo, Daniel
name: Labuhn, Henning
name: Ravets, Sylvain
name: Lahaye, Thierry
name: Browaeys, Antoine
name: Adams, Charles S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We study coherent excitation hopping in a spin chain realized using highly excited individually addressable Rydberg atoms. The dynamics are fully described in terms of an XY spin Hamiltonian with a long range resonant dipole-dipole coupling that scales as the inverse third power of the lattice spacing, $C_3/R^3$. The experimental data demonstrate the importance of next neighbor interactions which are manifest as revivals in the excitation dynamics. The results suggest that arrays of Rydberg atoms are ideally suited to large scale, high-fidelity quantum simulation of spin dynamics.
description: 5 pages and 4 figures + supplementary material ; published version
Application of the gauge theory of defects in analyzing the stress-strain state of pairs in friction transmissions
Creators: name: Grinyaev Yu, V.
name: Shilko V., K.
Publisher: name: Физическая мезомеханика
Year: 2005

description: In the paper using the gauge theory of defects we consider certain generation and redistribution conditions for normal and tangential stresses in pairs of sliding friction transmissions. Analytical dependences for the analysis of normal and tangential stresses in friction pairs are obtained with regard to the stress-strain state of a "third body" formed between the pairs. Stresses in a friction pair of the "pulley -ribbon saw" transmission are analyzed.
Propagation of nanofiber-guided light through an array of atoms
Creators: name: Kien, Fam Le
name: Rauschenbeutel, Arno
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We study the propagation of nanofiber-guided light through an array of atomic cesium, taking into account the transitions between the hyperfine levels $6S_{1/2}F=4$ and $6P_{3/2}F'=5$ of the $D_2$ line. We derive the coupled-mode propagation equation, the input-output equation, the scattering matrix, the transfer matrix, and the reflection and transmission coefficients for the guided field in the linear, quasistationary, weak-excitation regime. We show that, when the initial distribution of populations of atomic ground-state sublevels is flat, the quasilinear polarizations along the principal axes $x$ and $y$, which are parallel and perpendicular, respectively, to the radial direction of the atomic position, are not coupled to each other in the linear coherent scattering process. When the guided probe field is quasilinearly polarized along the major principal axis $x$, forward and backward scattering have different characteristics. We find that, when the array period is far from the Bragg resonance, the backward scattering is weak. Under the Bragg resonance, most of the guided probe light can be reflected back in a broad region of field detunings even though there is an irreversible decay channel into radiation modes. When the atom number is large enough, two different band gaps may be formed, whose properties depend on the polarization of the guided probe field.
description: 24 pages, 16 figures. Added references. arXiv admin note: text overlap with arXiv:1406.0108
Dispersion of guided modes in two-dimensional split ring lattices
Creators: name: Lunnemann, Per
name: Koenderink, A. Femius
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present a semi-analytical point-dipole method that uses Ewald lattice summation to find the dispersion relation of guided plasmonic and bianisotropic modes in metasurfaces composed of 2D periodic lattices of arbitrarily strongly scattering magneto-electric dipole scatterers. This method takes into account all retarded electrodynamic interactions as well as radiation damping selfconsistently. As illustration we analyze the dispersion of plasmon nanorod lattices, and of 2D split ring resonator lattices. Plasmon nanorod lattices support transverse and longitudinal in-plane electric modes. Scatterers that have an in-plane electric and out-of-plane magnetic polarizability, but without intrinsic magnetoelectric coupling, result in two bands that are mixtures of the bands of electric-only and magnetic-only lattices. Thereby bianisotropy through mutual coupling, in absence of building-block bianisotropy, is evident. Once strong bi-anisotropy is included in each building block, the Bloch modes become even more strongly magnetoelectric. Our results are important to understand spatial dispersion and bianisotropy of metasurface and metamaterial designs.
Численное моделирование процессов распространения сейсмоакустических полей с учетом неоднородности зоны проникновения
Creators: name: Решетова Г. В.
name: Чеверда В. А.
name: Ельцов И. Н.
Publisher: name: Физическая мезомеханика
Year: 2005

description: С помощью математического моделирования исследуется замеченная на данных акустического каротажа изменчивость амплитуды первых вступлений на фоне практически полного отсутствия вариаций времен первых вступлений. Предложено и обосновано на серии численных экспериментов объяснение волноводного характера распространения сейсмоакустических колебаний в зоне проникновения. Показано, что изменчивость мощности этой зоны приводит к существенным вариациям амплитуды волн.
Coherent manipulation of dipolar coupled spins in an anisotropic environment
Creators: name: Baibekov, E. I.
name: Gafurov, M. R.
name: Zverev, D. G.
name: Kurkin, I. N.
name: Malkin, B. Z.
name: Barbara, B.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study coherent dynamics in a system of dipolar coupled spin qubits diluted in solid and subjected to a driving microwave field. In the case of rare earth ions, anisotropic crystal background results in anisotropic g tensor and thus modifies the dipolar coupling. We develop a microscopic theory of spin relaxation in transient regime for the frequently encountered case of axially symmetric crystal field. The calculated decoherence rate is nonlinear in Rabi frequency. We show that the direction of static magnetic field that corresponds to the highest spin g-factor is preferable in order to obtain higher number of coherent qubit operations. The results of calculations are in excellent agreement with our experimental data on Rabi oscillations recorded for a series of CaWO4 crystals with different concentrations of Nd3+ ions.
description: 16 pages, 9 figures
Social Network Capital and Academic Careers
Creators: name: Medicamento, Umberto
name: Wilson, Paul N.
name: Rahman, Tauhidur
name: Thompson, Gary D.
name: Medicamento, Umberto
name: Wilson, Paul N.
name: Rahman, Tauhidur
name: Thompson, Gary D.
Publisher: name: Unknown
Year: 2010
Subjects: subject: Institutional and Behavioral Economics
subject: Labor and Human Capital
subject: Teaching/Communication/Extension/Profession
subject: Social capital
subject: academic networks
subject: human capital

description: Social Network Capital and Academic Careers: The Case of a College of Agriculture ABSTRACT The relationship between economic performance and various forms of capital anchors a significant portion of mainstream economic theory and applied economics. Human, physical and financial capital represent important factors in the production of goods and services. The label “capital” implies characteristics such as investment, accumulation, maintenance, depreciation, and transfer. Recently, social capital or social network capital (SNC) has received increased scholarly attention in the literature of sociology, business, and economics. Limited analysis, however, has been directed at the role of SNC in the academy. We hypothesize that academic success at the professorial level is determined by the stock of human (HC) and SNC and the value flows emerging from these stocks. We view SNC as a complement to HC, increasing the productivity of HC while holding all other factors constant. An analysis of SNC’s importance to academic career success should interest the academy as well as other large organizations (i.e. research laboratories, government agencies) with similar structures and incentive systems.
Characterization and mapping of surface physical properties of Mars from CRISM multi-angular data: application to Gusev Crater and Meridiani Planum
Creators: name: Fernando, J.
name: Schmidt, F.
name: Pilorget, C.
name: Pinet, P.
name: Ceamanos, X.
name: Douté, S.
name: Daydou, Y.
name: Costard, F.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The analysis of the surface texture from the particle (grain size, shape and internal structure) to its organization (surface roughness) provides information on the geological processes. CRISM multi-angular observations (varied emission angles) allow to characterize the surface scattering behavior which depends on the composition but also the material physical properties (e.g., grain size, shape, internal structure, the surface roughness). After an atmospheric correction by the Multi-angle Approach for Retrieval of the Surface Reflectance from CRISM Observations, the surface reflectances at different geometries are analyzed by inverting the Hapke photometric model depending on the single scattering albedo, the 2-term phase function, the macroscopic roughness and the 2-term opposition effects. Surface photometric maps are created to observe the spatial variations of surface scattering properties as a function of geological units at the CRISM spatial resolution (200m/pixel). An application at the Mars Exploration Rover (MER) landing sites located at Gusev Crater and Meridiani Planum where orbital and in situ observations are available, is presented. Complementary orbital observations (e.g. CRISM spectra, THermal EMission Imaging System, High Resolution Imaging Science Experiment images) are used for interpreting the estimated Hapke photometric parameters in terms of physical properties. The in situ observations are used as ground truth to validate the interpretations. Varied scattering properties are observed inside a CRISM observation (5x10km) suggesting that the surfaces are controlled by local geological processes (e.g. volcanic resurfacing, aeolian and impact processes) rather than regional or global. Consistent results with the in situ observations are observed thus validating the approach and the use of photometry for the characterization of Martian surface physical properties.
О пульсирующем режиме сейсмоэнерговыделения из напряженных участков шахтных полей
Creators: name: Опарин В. Н.
name: Востриков В. И.
name: Жилкина Н. Ф.
name: Тапсиев А. П.
Publisher: name: Физическая мезомеханика
Year: 2005

description: Анализ обширного банка данных сейсмических записей толчков и горных ударов, зарегистрированных сейсмостанцией «Норильск» на рудниках Октябрьский и Таймырский Норильского месторождения медно-никелевых руд, позволил обнаружить пульсирующий режим сейсмоэнерговыделения из напряженных участков рудного и породного массивов с движением фронтов индуцированной сейсмичности как в направлении от центров соответствующих «ядерных» зон, так и по направлению к ним по типу своеобразного колеблющегося «маятника». Даны соответствующие кинематические оценки. Отмечается важная для прогнозных оценок катастрофических событий связь между средними значениями скоростей миграции фронтов индуцированной сейсмичности и «кажущихся» скоростей миграции сейсмособытий для упорядоченных по времени их проявления последовательностей в пределах зон повышенной сейсмоактивности.
Lutterworth Pauper Children and Apprenticeship, 1673-1856
Creators: name: Farrell, Jerome
Publisher: name: Archaeology Data Service
Year: 2023

description: Leicestershire Historian, 3 (2), 17-24
description: A review of the series of 385 apprenticeship indentures spanning the period 1673-1856 form the Lutterworth parish records
Нелинейное возбуждение упругих волн в околоскважинном пространстве
Creators: name: Егоров Г. В.
Publisher: name: Физическая мезомеханика
Year: 2005

description: С использованием нелинейных свойств среды осуществлено возбуждение упругих волн в околоскважинном объеме источником, находящимся внутри обсадной трубы скважины. В трубе в диапазоне ее резонанса возбуждались бигармонические радиальные колебания, которые в водонасыщенном речном песке генерировали упругую волну разностной частоты