cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Threshold theorem in isolated quantum dynamics with stochastic control errors
Creators: name: Okuyama, Manaka
name: Ohki, Kentaro
name: Ohzeki, Masayuki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the effect of stochastic control errors in the time-dependent Hamiltonian on isolated quantum dynamics. The control errors are formulated as time-dependent stochastic noise in the Schrodinger equation. For a class of stochastic control errors, we establish a threshold theorem that provides a sufficient condition to obtain the target state, which should be determined in noiseless isolated quantum dynamics, as a relation between the number of measurements and noise strength. The theorem guarantees that if the sum of the noise strengths is less than the inverse of computational time, the target state can be obtained through a constant-order number of measurements. If the opposite is true, the number of measurements to guarantee obtaining the target state increases exponentially with computational time. Our threshold theorem can be applied to any isolated quantum dynamics such as quantum annealing and adiabatic quantum computation.
description: 9 pages, 0 figure
There exist no 4-dimensional geodesically equivalent metrics with the same stress-energy tensor
Creators: name: Kiosak, Volodymir
name: Matveev, Vladimir S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Differential Geometry (math.DG)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We show that if two 4-dimensional metrics of arbitrary signature on one manifold are geodesically equivalent (i.e., have the same geodesics considered as unparameterized curves) and are solutions of the Einstein field equation with the same stress-energy tensor, then they are affinely equivalent or flat. Under the additional assumption that the metrics are complete or the manifold is closed, the result survives in all dimensions >2.
QCD evolution of the gluon Sivers function in heavy flavor dijet production at the Electron-Ion Collider
Creators: name: Kang, Zhong-Bo
name: Reiten, Jared
name: Shao, Ding Yu
name: Terry, John
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Using Soft-Collinear Effective Theory, we develop the transverse-momentum-dependent factorization formalism for heavy flavor dijet production in polarized-proton-electron collisions. We consider heavy flavor mass corrections in the collinear-soft and jet functions, as well as the associated evolution equations. Using this formalism, we generate a prediction for the gluon Sivers asymmetry for charm and bottom dijet production at the future Electron-Ion Collider. Furthermore, we compare theoretical predictions with and without the inclusion of finite quark masses. We find that the heavy flavor mass effects can give sizable corrections to the predicted asymmetry.
description: 25 pages, 6 figures; journal version
Sketch-based community detection in evolving networks
Creators: name: Beckus, Andre
name: Atia, George K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Machine Learning (cs.LG)
subject: Social and Information Networks (cs.SI)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We consider an approach for community detection in time-varying networks. At its core, this approach maintains a small sketch graph to capture the essential community structure found in each snapshot of the full network. We demonstrate how the sketch can be used to explicitly identify six key community events which typically occur during network evolution: growth, shrinkage, merging, splitting, birth and death. Based on these detection techniques, we formulate a community detection algorithm which can process a network concurrently exhibiting all processes. One advantage afforded by the sketch-based algorithm is the efficient handling of large networks. Whereas detecting events in the full graph may be computationally expensive, the small size of the sketch allows changes to be quickly assessed. A second advantage occurs in networks containing clusters of disproportionate size. The sketch is constructed such that there is equal representation of each cluster, thus reducing the possibility that the small clusters are lost in the estimate. We present a new standardized benchmark based on the stochastic block model which models the addition and deletion of nodes, as well as the birth and death of communities. When coupled with existing benchmarks, this new benchmark provides a comprehensive suite of tests encompassing all six community events. We provide analysis and a set of numerical results demonstrating the advantages of our approach both in run time and in the handling of small clusters.
Cavity optomechanics with synthetic Landau levels of ultra cold Fermi gas
Creators: name: Padhi, Bikash
name: Ghosh, Sankalpa
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Ultra cold fermionic atoms placed in a synthetic magnetic field arrange themselves in Landau levels. We theoretically study the optomechanical interaction between the light field and collective excitations of such fermionic atoms in synthetic magnetic field by placing them in side a Fabry Perot cavity. We derive the effective hamiltonian for particle hole excitations from a filled Landau level using a bosonization technique and obtain an expression for the cavity transmission spectrum. Using this we show that the cavity transmission spectrum demonstrates cold atom analogue of Subnikov de Hass oscillation in electronic condensed matter systems. We discuss the experimental consequences for this oscillation for such system and the related optical bistability.
description: Minor revisions: Accepted for publication in Physical Review Letters
Fast Flavor Oscillations of Astrophysical Neutrinos with $1,\,2,\,\ldots,\,\infty$ Crossings
Creators: name: Bhattacharyya, Soumya
name: Dasgupta, Basudeb
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In the early Universe, as well as in supernovae and merging neutron stars, neutrinos have such high densities that they affect each other and exhibit collective flavor oscillations. A crucial ingredient for fast collective flavor oscillations is that the electron lepton number (ELN) distribution changes its sign as a function of direction, i.e., has a zero crossing. We present a study in two dimensions and show how fast flavor oscillations depend on the ELN and its crossings. We show that a large number of crossings can inhibit flavor oscillations. This may be a natural self-limiting mechanism that stabilizes the flavor content of the dense neutrino gas in a vast majority of scenarios, especially the early Universe, where the angular distributions for all flavors are very similar and crossings occur mainly due to fluctuations.
description: 25 pages, 6 figures
Electron-Ion Collider impact study on the tensor charge of the nucleon
Creators: name: Gamberg, Leonard
name: Kang, Zhong-Bo
name: Pitonyak, Daniel
name: Prokudin, Alexei
name: Sato, Nobuo
name: Seidl, Ralf
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this letter we study the impact of the Electron-Ion Collider (EIC) on the phenomenological extraction of the tensor charge from a QCD global analysis of single transverse-spin asymmetries (SSAs). We generate EIC pseudo-data for the Collins effect in semi-inclusive deep-inelastic scattering for proton and $^{3\!}He$ beams across multiple center-of-mass energies. We find a significant reduction in the uncertainties for the up, down, and isovector tensor charges that will make their extraction from EIC data on SSAs as precise as current lattice QCD calculations. We also analyze the constraints placed by future data from the proposed SoLID experiment at Jefferson Lab, discuss its important complementary role to the EIC, and present the combined impact from both facilities.
description: 12 pages, 6 figures, 1 table; minor changes; version to be published in PLB
Parameterisation space for Cornell potential in a QCD potential model
Creators: name: Pathak, Krishna Kingkar
name: Bhattacharya, Satyadeep
name: Das, Tapashi
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We make a critical analysis on the free parameters of the Cornell potential $-4α_{s}/3r+br+c$ and provide a parameterisation space for the strong coupling constant $α_{s}$ and the constant shift $c$ for choosing linear part as perturbation in the potential model. In the analysis of heavy-light mesons $(D,D_{s},B,B_{s}~ \text{and} ~B_{c})$, we have found a wide range of values for the coupling constant i.e $0.20 \leq α_{s}\leq 0.64$ with $-1.2 \leq c \leq -0.66$ which can be used to treat the confining part as perturbation.
description: 7 Pages, 1 figures, 3 tables, 24 references
Transverse $Λ$ Polarization in $e^+ e^-$ collisions
Creators: name: Gamberg, Leonard
name: Kang, Zhong-Bo
name: Shao, Ding Yu
name: Terry, John
name: Zhao, Fanyi
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this paper we study transverse polarization of $Λ$ hyperons in single-inclusive leptonic annihilation. We show that when the transverse momentum of the $Λ$ baryon is measured with respect to the thrust axis, a transverse momentum dependent (TMD) factorization formalism is required and the polarization is generated by the TMD polarizing fragmentation function (TMD PFF), $D_{1T}^\perp$. However, when the transverse momentum of the $Λ$ baryon is measured with respect to the momentum of the initial leptons, a collinear twist-3 formalism is required and the polarization is generated by the intrinsic collinear twist-3 fragmentation function $D_{T}$. Thus while these measurements differ from one another only by a change in the measurement axis, they probe different distribution functions. Recently, Belle measured a significant polarization in single-inclusive $Λ$ baryon production as a function of the transverse momentum with respect to the thrust axis. However, this data can in principle be re-analyzed to measure the polarization as a function of the transverse momentum of the $Λ$ baryon with respect to the lepton pair. This observable could be the first significant probe of the function, $D_{T}$. In this paper, we first develop a TMD formalism for $Λ$ polarization; we then present a recent twist-3 formalism that was established to describe $Λ$ polarization. Using the TMD formalism, we demonstrate that the $Λ$ polarization at OPAL and Belle can be described using the twist-2 TMD factorization formalism. Finally, we make a theoretical prediction for this polarization in the collinear twist-3 formalism at Belle.
description: 11 pages, 7 figures
Physics-compatible discretization techniques on single and dual grids, with application to the Poisson equation of volume forms
Creators: name: Palha, Artur
name: Rebelo, Pedro Pinto
name: Hiemstra, René
name: Kreeft, Jasper
name: Gerritsma, Marc
Publisher: name: arXiv
Year: 2013
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: This paper introduces the basic concepts for physics-compatible discretization techniques. The paper gives a clear distinction between vectors and forms. Based on the difference between forms and pseudo-forms and the $\star$-operator which switches between the two, a dual grid description and a single grid description are presented. The dual grid method resembles a staggered finite volume method, whereas the single grid approach shows a strong resemblance with a finite element method. Both approaches are compared for the Poisson equation for volume forms.
description: 27 pages
Ultrasound Matrix Imaging-Part I: The focused reflection matrix, the F-factor and the role of multiple scattering
Creators: name: Lambert, William
name: Robin, Justine
name: Cobus, Laura A.
name: Fink, Mathias
name: Aubry, Alexandre
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: Image and Video Processing (eess.IV)
subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This is the first article in a series of two dealing with a matrix approach for aberration quantification and correction in ultrasound imaging. Advanced synthetic beamforming relies on a double focusing operation at transmission and reception on each point of the medium. Ultrasound matrix imaging (UMI) consists in decoupling the location of these transmitted and received focal spots. The response between those virtual transducers form the so-called focused reflection matrix that actually contains much more information than a confocal ultrasound image. In this paper, a time-frequency analysis of this matrix is performed, which highlights the single and multiple scattering contributions as well as the impact of aberrations in the monochromatic and broadband regimes. Interestingly, this analysis enables the measurement of the incoherent input-output point spread function at any pixel of this image. A fitting process enables the quantification of the single scattering, multiple scattering and noise components in the image. From the single scattering contribution, a focusing criterion is defined, and its evolution used to quantify the amount of aberration throughout the ultrasound image. In contrast to the state-of-the-art coherence factor, this new indicator is robust to multiple scattering and electronic noise, thereby providing a contrasted map of the focusing quality at a much better transverse resolution. After a validation of the proof-of-concept based on time-domain simulations, UMI is applied to the in-vivo study of a human calf. Beyond this specific example, UMI opens a new route for speed-of-sound and scattering quantification in ultrasound imaging.
description: 15 pages, 7 figures
Discussion of 'Estimating time-varying causal excursion effect in mobile health with binary outcomes' by T. Qian et al
Creators: name: Guo, F. Richard
name: Richardson, Thomas S.
name: Robins, James M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: We discuss the recent paper on "excursion effect" by T. Qian et al. (2020). We show that the methods presented have close relationships to others in the literature, in particular to a series of papers by Robins, Hernán and collaborators on analyzing observational studies as a series of randomized trials. There is also a close relationship to the history-restricted and the history-adjusted marginal structural models (MSM). Important differences and their methodological implications are clarified. We also demonstrate that the excursion effect can depend on the design and discuss its suitability for modifying the treatment protocol.
description: Submitted to Biometrika as an invited discussion
A gauss-kuzmin theorem and related questions for $θ$-expansions
Creators: name: Sebe, Gabriela Ileana
name: Lascu, Dan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 11A55, 11K50

description: Using the natural extension for $θ$-expansions, we give an infinite-order-chain representation of the sequence of the incomplete quotients of these expansions. Together with the ergodic behavior of a certain homogeneous random system with complete connections, this allows us to solve a variant of Gauss-Kuzmin problem for the above fraction expansion.
description: 27 pages
title: Wildfleisch: Gesundheitliche Bewertung von humanpathogenen Parasiten: Stellungnahme Nr. 045/2018 des BfR vom 21. Dezember 2018
Creators: name: Bundesinstitut Für Risikobewertung
Publisher: name: Bundesbehörden und Einrichtungen im Geschäftsbereich des Bundesministeriums für Ernährung und Landwirtschaft (BMEL)
Year: 2018
Subjects: subject: 000

description: BfR-Stellungnahmen, vol. 2018, no. 045
Supplementary information for: Species tree inference methods intended to deal with incomplete lineage sorting are robust to the presence of paralog
Creators: name: Yan, Zhi
name: Smith, Megan
name: Du, Peng
name: Hahn, Matthew
name: Nakhleh, Luay
Publisher: name: Zenodo
Year: 2021

description: Supplementary material for the publication titled: Species tree inference methods intended to deal with incomplete lineage sorting are robust to the presence of paralog
Engineering Nanowire n-MOSFETs at Lg < 8 nm
Creators: name: Mehrotra, Saumitra
name: Kim, SungGeun
name: Kubis, Tillmann
name: Povolotskyi, Michael
name: Lundstrom, Mark
name: Klimeck, Gerhard
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: As metal-oxide-semiconductor field-effect transistors (MOSFET) channel lengths (Lg) are scaled to lengths shorter than Lg<8 nm source-drain tunneling starts to become a major performance limiting factor. In this scenario a heavier transport mass can be used to limit source-drain (S-D) tunneling. Taking InAs and Si as examples, it is shown that different heavier transport masses can be engineered using strain and crystal orientation engineering. Full-band extended device atomistic quantum transport simulations are performed for nanowire MOSFETs at Lg<8 nm in both ballistic and incoherent scattering regimes. In conclusion, a heavier transport mass can indeed be advantageous in improving ON state currents in ultra scaled nanowire MOSFETs.
description: 6 pages, 7 figures, journal
title: Release of metals from enamel-coated grill racks: Several give off too much: BfR Opinion No 044/2018 of 26 July 2018
Creators: name: Bundesinstitut Für Risikobewertung
Publisher: name: Bundesbehörden und Einrichtungen im Geschäftsbereich des Bundesministeriums für Ernährung und Landwirtschaft (BMEL)
Year: 2018
Subjects: subject: 000

description: BfR-Stellungnahmen, vol. 2018, no. 024
On the thermodynamics of periodic AdS black branes
Creators: name: Donos, Aristomenis
name: Gauntlett, Jerome P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider asymptotically AdS black brane solutions that are dual to CFTs with periodic dependence on the spatial directions, arising from either a spontaneous or an explicit breaking of translational symmetry. We derive a simple expression for the variation of the free-energy with respect to changing the periods. This explains some observations, based on numerics, that have arisen in the explicit construction of thermodynamically preferred black holes in the case that the spatial directions are infinite in extent and the symmetry is spontaneously broken. It also leads to simple Smarr-type relations involving the boundary stress tensor..
description: 18 pages. Smarr relations strengthened. References added
Quantum phase transition in an atom-molecule conversion system with atomic hopping
Creators: name: Hui, Ning-Ju
name: Lu, Li-Hua
name: Xu, Xiao-Qiang
name: Li, You-Quan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: The quantum phase transition in an atom-molecule conversion system with atomic hopping between different hyperfine states is studied. In mean field approximation, we give the phase diagram whose phase boundary only depends on the atomic hopping strength and the atom-molecule energy detuning but not on the atomic interaction. Such a phase boundary is further confirmed by the fidelity of the ground state and the energy gap between the first-excited state and the ground one. In comparison to mean field approximation, we also study the quantum phase transition in full quantum method, where the phase boundary can be affected by the particle number of the system. Whereas, with the help of finite-size scaling behaviors of energy gap, fidelity susceptibility and the first-order derivative of entanglement entropy, we show that one can obtain the same phase boundary by the MFA and full quantum methods in the limit of $N\rightarrow \infty$. Additionally, our results show that the quantum phase transition can happens at the critical value of the atomic hopping strength even if the atom-molecule energy detuning is fixed on a certain value, which provides one a new way to control the quantum phase transition.
description: 7 pages,6 figures
Ultrafast light-induced dynamics in the microsolvated biomolecular indole chromophore with water
Creators: name: Onvlee, Jolijn
name: Trippel, Sebastian
name: Küpper, Jochen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: Interactions between proteins and their solvent environment can be studied in a bottom-up approach using hydrogen-bonded chromophore-solvent clusters. The ultrafast dynamics following UV-light-induced electronic excitation of the chromophores, potential radiation damage, and their dependence on solvation are important open questions. The microsolvation effect is challenging to study due to the inherent mix of the produced gas-phase aggregates. We use the electrostatic deflector to spatially separate different molecular species in combination with pump-probe velocity-map-imaging experiments. We demonstrate that this powerful experimental approach reveals intimate details of the UV-induced dynamics in the near-UV-absorbing prototypical biomolecular indole-water system. We determine the time-dependent appearance of the different reaction products and disentangle the occurring ultrafast processes. This approach ensures that the reactants are well-known and that detailed characteristics of the specific reaction products are accessible -- paving the way for the complete chemical-reactivity experiment.
Background Rejection in the DMTPC Dark Matter Search Using Charge Signals
Creators: name: Lopez, J. P.
name: Dujmic, D.
name: Ahlen, S.
name: Battat, J. B. R.
name: Deaconu, C.
name: Fisher, P.
name: Henderson, S.
name: Inglis, A.
name: Kaboth, A.
name: Monroe, J.
name: Sciolla, G.
name: Tomita, H.
name: Wellenstein, H.
name: Yamamoto, R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The Dark Matter Time Projection Chamber (DMTPC) collaboration is developing a low pressure gas TPC for detecting Weakly Interacting Massive Particle (WIMP)-nucleon interactions. Optical readout with CCD cameras allows for the detection of the daily modulation of the direction of the dark matter wind. In order to reach sensitivities required for WIMP detection, the detector needs to minimize backgrounds from electron recoils. This paper demonstrates that a simplified CCD analysis achieves $7.3\times10^{-5}$ rejection of electron recoils while a charge analysis yields an electron rejection factor of $3.3\times10^{-4}$ for events with $^{241}$Am-equivalent ionization energy loss between 40 keV and 200 keV. A combined charge and CCD analysis yields a background-limited upper limit of $1.1\times10^{-5}$ (90% confidence level) for the rejection of $γ$ and electron events. Backgrounds from alpha decays from the field cage are eliminated by introducing a veto electrode that surrounds the sensitive region in the TPC. CCD-specific backgrounds are reduced more than two orders of magnitude when requiring a coincidence with the charge readout.
description: 18 pages, 12 figures. Preprint accepted by NIM A
Robust discrete choice models with t-distributed kernel errors
Creators: name: Krueger, Rico
name: Bierlaire, Michel
name: Gasos, Thomas
name: Bansal, Prateek
Publisher: name: arXiv
Year: 2020
Subjects: subject: Econometrics (econ.EM)
subject: Methodology (stat.ME)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: Outliers in discrete choice response data may result from misclassification and misreporting of the response variable and from choice behaviour that is inconsistent with modelling assumptions (e.g. random utility maximisation). In the presence of outliers, standard discrete choice models produce biased estimates and suffer from compromised predictive accuracy. Robust statistical models are less sensitive to outliers than standard non-robust models. This paper analyses two robust alternatives to the multinomial probit (MNP) model. The two models are robit models whose kernel error distributions are heavy-tailed t-distributions to moderate the influence of outliers. The first model is the multinomial robit (MNR) model, in which a generic degrees of freedom parameter controls the heavy-tailedness of the kernel error distribution. The second model, the generalised multinomial robit (Gen-MNR) model, is more flexible than MNR, as it allows for distinct heavy-tailedness in each dimension of the kernel error distribution. For both models, we derive Gibbs samplers for posterior inference. In a simulation study, we illustrate the excellent finite sample properties of the proposed Bayes estimators and show that MNR and Gen-MNR produce more accurate estimates if the choice data contain outliers through the lens of the non-robust MNP model. In a case study on transport mode choice behaviour, MNR and Gen-MNR outperform MNP by substantial margins in terms of in-sample fit and out-of-sample predictive accuracy. The case study also highlights differences in elasticity estimates across models.
Exploring the N$Λ$-N$Σ$ coupled system with high precision correlation techniques at the LHC
Creators: name: ALICE Collaboration
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The interaction of $Λ$ and $Σ$ hyperons (Y) with nucleons (N) is strongly influenced by the coupled-channel dynamics. Due to the small mass difference of the $\rm N Λ$ and $\rm N Σ$ systems, the sizeable coupling strength of the $\rm N Σ\leftrightarrow N Λ$ processes constitutes a crucial element in the determination of the N$Λ$ interaction. In this letter we present the most precise measurements on the interaction of p$Λ$ pairs, from zero relative momentum up to the opening of the $\rm N Σ$ channel. The correlation function in the relative momentum space for $\mathrm{p}Λ\oplus\overline{\mathrm{p}}\overlineΛ$ pairs measured in high-multiplicity triggered pp collisions at $\sqrt{s}~=~13$ TeV at the LHC is reported. The opening of the inelastic N$Σ$ channels is visible in the extracted correlation function as a cusp-like structure occurring at relative momentum $k^{*}$ = 289 MeV/$c$. This represents the first direct experimental observation of the $\rm N Σ\rightarrow N Λ$ coupled channel in the p$Λ$ system. The correlation function is compared with recent chiral effective field theory calculations, based on different strengths of the $\rm N Σ\leftrightarrow N Λ$ transition potential. A weaker coupling, as possibly supported by the present measurement, would require a more repulsive three-body NN$Λ$ interaction for a proper description of the $Λ$ in-medium properties, which has implications on the nuclear equation of state and for the presence of hyperons inside neutron stars.
description: 19 pages, 2 captioned figures, 2 tables, authors from page 14, published version, figures at http://alice-publications.web.cern.ch/node/7048
Electrowetting of a soap bubble
Creators: name: Arscott, Steve
Publisher: name: arXiv
Year: 2013
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A proof-of-concept demonstration of the electrowetting-on-dielectric of a sessile soap bubble is reported here. The bubbles are generated using a commercial soap bubble mixture - the surfaces are composed of highly doped, commercial silicon wafers covered with nanometre thick films of Teflon. Voltages less than 40V are sufficient to observe the modification of the bubble shape and the apparent bubble contact angle. Such observations open the way to inter alia the possibility of bubble-transport, as opposed to droplet-transport, in fluidic microsystems (e.g. laboratory-on-a-chip) - the potential gains in terms of volume, speed and surface/volume ratio are non-negligible.
Magnetic field symmetries of nonlinear transport with elastic and inelastic scattering
Creators: name: Bedkihal, Salil
name: Bandyopadhyay, Malay
name: Segal, Dvira
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study nonlinear electronic transport symmetries in Aharonov-Bohm interferometers subjected to inelastic scattering effects and show that odd (even) conductance terms are even (odd) in the magnetic field when the junction is (left-right) spatially symmetric. This observation does not hold when an asymmetry is introduced, as we show numerically, but odd conductance terms only manifest a weak breakdown of the magnetic field symmetry. Under elastic dephasing effects, the Onsager-Casimir symmetry is maintained beyond linear response and under spatial asymmetries.
Study of Gauge Symmetry of Some Field Theoretical Models Through the Lagrangian Formulation
Creators: name: Yasmin, Safia
name: Rahaman, Anisur
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Study of gauge symmetry is carried over the different interacting and noninteracting field theoretical models through a prescription based on lagrangian formulation. It is found that the prescription is capable of testing whether a given model posses a gauge symmetry or not. It can successfully formulate the gauge transformation generator in all the cases whatever subtleties are involved in it. It is found that the prescription has the ability to show a direction how to extend the phase space using auxiliary fields to restore the gauge invariance of a theory. Like the usual phase space the prescription is found to be equally powerful in the extended phase space of a theory.
description: 22 pages latex; No figure; To appear in Int. Jour. Theor. Phys
Semi-blind Channel Estimation and Data Detection for Multi-cell Massive MIMO Systems on Time-Varying Channels
Creators: name: Naraghi-Pour, Mort
name: Rashid, Mohammed
name: Vargas-Rosales, Cesar
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Theory (cs.IT)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We study the problem of semi-blind channel estimation and symbol detection in the uplink of multi-cell massive MIMO systems with spatially correlated time-varying channels. An algorithm based on expectation propagation (EP) is developed to iteratively approximate the joint a posteriori distribution of the unknown channel matrix and the transmitted data symbols with a distribution from an exponential family. This distribution is then used for direct estimation of the channel matrix and detection of data symbols. A modified version of the popular Kalman filtering algorithm referred to as KF-M emerges from our EP derivation and it is used to initialize the EP-based algorithm. Performance of the Kalman smoothing algorithm followed by KF-M is also examined. Simulation results demonstrate that channel estimation error and the symbol error rate (SER) of the semi-blind KF-M, KS-M, and EP-based algorithms improve with the increase in the number of base station antennas and the length of the transmitted frame. It is shown that the EP-based algorithm significantly outperforms KF-M and KS-M algorithms in channel estimation and symbol detection. Finally, our results show that when applied to time-varying channels, these algorithms outperform the algorithms that are developed for block-fading channel models.
description: 28 pages, 13 figures, Submitted to IEEE Trans. on Vehicular Technology
A waveguide-coupled thermally-isolated radiometric source
Creators: name: Rostem, Karwan
name: Chuss, David T.
name: Lourie, Nathan P.
name: Voellmer, George M.
name: Wollack, Edward J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The design and validation of a dual polarization source for waveguide-coupled millimeter and sub-millimeter wave cryogenic sensors is presented. The thermal source is a waveguide mounted absorbing conical dielectric taper. The absorber is thermally isolated with a kinematic suspension that allows the guide to be heat sunk to the lowest bath temperature of the cryogenic system. This approach enables the thermal emission from the metallic waveguide walls to be subdominant to that from the source. The use of low thermal conductivity Kevlar threads for the kinematic mount effectively decouples the absorber from the sensor cold stage. Hence, the absorber can be heated to significantly higher temperatures than the sensor with negligible conductive loading. The kinematic suspension provides high mechanical repeatability and reliability with thermal cycling. A 33-50 GHz blackbody source demonstrates an emissivity of 0.999 over the full waveguide band where the dominant deviation from unity arrises from the waveguide ohmic loss. The observed thermal time constant of the source is 40 s when the absorber temperature is 15 K. The specific heat of the lossy dielectric MF-117 is well approximated by $C_v(T)=0.12\,T\,^{2.06}$ mJ g$^{-1}$ K$^{-1}$ between 3.5 K and 15 K.
X-ray interference effects on the determination of structural data in ultrathin La2/3Sr1/3MnO3 epitaxial thin films
Creators: name: Pesquera, D.
name: Bachelet, R.
name: Herranz, G.
name: Fontcuberta, J.
name: Marti, X.
name: Holy, V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We analyze X-ray diffraction data used to extract cell parameters of ultrathin films on closely matching substrates. We focus on epitaxial La2/3Sr1/3MnO3 films grown on (001) SrTiO3 single crystalline substrates. It will be shown that, due to extremely high structural similarity of film and substrate, data analysis must explicitly consider the distinct phase of the diffracted waves by substrate and films to extract reliable unit cell parameters. The implications of this finding for the understanding of strain effects in ultrathin films and interfaces will be underlined
Porous dust grains in debris disks
Creators: name: Kirchschlager, Florian
name: Wolf, Sebastian
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: When modeling the density and grain size distribution in debris disks, the minimum particle size is often significantly larger than the corresponding blowout size. While the dust particles are usually modeled as compact, homogenous spheres, we instead investigate the impact of porosity. The optical properties of porous particles are determined, and the influences of porosity on the blowout size and dust temperatures investigated. Using the method of discrete dipole approximation, we calculate the scattering and absorption cross sections of porous particles and derive the blowout size and the behavior of the dust temperature. We investigate the influence on the beta-ratio. Blowout sizes are calculated for various stellar luminosities and porosities, and an approximation equation is derived to estimate the blowout size as a function of these parameters. Furthermore, we investigate the influence of the porosity on the dust equilibrium temperature. The blowout size increases with the particle porosity and stellar luminosity. The dust temperature of porous particles is lower than the one of the compact spheres, in particular the temperature of blowout grains decreases for porous particles.
description: 10 pages, 18 figures
The strong truncated Hamburger moment problem with and without gaps
Creators: name: Zalar, Aljaž
Publisher: name: arXiv
Year: 2021
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: Primary 47A57, 47A20, 44A60, Secondary 15A04, 47N40

description: The strong truncated Hamburger moment problem (STHMP) of degree $(-2k_1,2k_2)$ asks to find necessary and sufficient conditions for the existence of a positive Borel measure, supported on $\mathbb{R}\setminus \{0\}$, such that $β_i=\int x^idμ\; (-2k_1\leq i\leq 2k_2)$. Using the solution of the truncated Hamburger moment problem and the properties of Hankel matrices we solve the STHMP. Then, using the equivalence with the STHMP of degree $(-2k,2k)$, we obtain the solution of the 2-dimensional truncated moment problem (TMP) of degree $2k$ with variety $xy=1$, first solved by Curto and Fialkow. Our addition to their result is the fact previously known only for $k=2$, that the existence of a measure is equivalent to the existence of a flat extension of the moment matrix. Further on, we solve the STHMP of degree $(-2k_1,2k_2)$ with one missing moment in the sequence, i.e., $β_{-2k_1+1}$ or $β_{2k_2-1}$, which also gives the solution of the TMP with variety $x^2y=1$ as a special case, first studied by Fialkow.
description: 20 pages. arXiv admin note: text overlap with arXiv:2007.11846
Scripts to evaluate the approaches
Creators: name: Aktaş, Ethem Utku
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 461202
subject: Empirical software engineering

description: This study aims to develop a tool that guides reporters in providing the necessary information (OB (Observed Behaviour), S2R (Steps to reproduce) and EB (Expected Behaviour)) in an industrial setting. The proposed approach is developed for issue reports written specifically in Turkish language. It is motivated by the need for issue report classification tools that can handle the unique characteristics of the Turkish language, such as the presence of many compound words. The scripts given in this project are used to evaluate the proposed approaches for the industrial case.
kultur GUTerhalten. Eine Sonderausstellung der Staatlichen Museen zu Berlin im Alten Museum vom 27. März bis 28. Juni 2009
Creators: name: Peltz, Uwe
Publisher: name: Verlag des Römisch-Germanischen Zentralmuseums Mainz
Year: 2017

description: [nicht vorhanden / not available]
description: Restaurierung und Archäologie, Bd. 1 (2008): Restaurierung und Archäologie
Surfactant mediated growth of ferromagnetic Mn δ-doped Si
Creators: name: Kahwaji, S.
name: Gordon, R. A.
name: Crozier, E. D.
name: Roorda, S.
name: Robertson, M. D.
name: Zhu, J.
name: Monchesky, T. L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present an investigation of Mn δ-doped layers in Si(001) grown by molecular beam epitaxy. We discovered that a Pb surfactant has significant effect on the structural and magnetic properties of the submonolayer of Mn, which depends on the Si capping layer growth temperature, T_Si, and the Mn coverage, θ_Mn. The results presented in this paper identify three regions in the growth-phase-diagram characterized by distinct magnetic behaviors and crystal structures. In one region, X-ray absorption fine structure (XAFS) and transmission electron microscopy (TEM) experiments indicate that MnSi nanocrystallites form with B2-like crystal type structures. At the optimal growth conditions, T_Si = 200 C and θ_Mn = 0.26 monolayer, a ferromagnetic phase develops with a Curie temperature T_C > 400 K and a saturation moment m_sat = 1.56 μ_B/Mn, whereas T_C drops to zero for a control sample prepared without Pb. For T_Si > 200 C, MnSi-B20 type precipitates form with a T_C ~ 170 K. Rutherford backscattering spectroscopy shows that the increase in the remanent magnetization in these two phases is possibly correlated with an increase in the Mn substitutional fraction, which suggests that a Si_{1-x}Mn_x dilute magnetic semiconductor may be forming in the matrix between the precipitates. Density functional calculations show that Pb changes the pathway by which the Mn atoms access the Si substitutional sites, Mn_Si. While the Pb increases the formation energy of Mn_Si at the Si surface, it enables substitutional incorporation by lowering the formation energy of Si vacancies by 0.92 eV.
description: 10 pages, 8 figures
Many-body localization in the infinite-interaction limit and the discontinuous eigenstate phase transition
Creators: name: Chen, Chun
name: Chen, Yan
name: Wang, Xiaoqun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Can localization persist when interaction grows infinitely stronger than randomness? If so, is it many-body Anderson localization? How about the associated localization transition in the infinite-interaction limit? To tackle these questions, we study many-body localization (MBL) in a spin-chain model mimicking the Rydberg-blockade quantum simulator with both infinite-strength projection and moderate quasiperiodic modulation. Employing exact diagonalization, Krylov-typicality technique, and time-evolving block decimation, we identify evidence for a constrained MBL phase stabilized by a pure quasirandom transverse field. Remarkably, the constrained MBL transition may embody a discontinuous eigenstate phase transition, whose discontinuity nature significantly suppresses the finite-size drifts that plague most numerical studies of conventional MBL transition. Through quantum dynamics, we find that rotating the modulated field from parallel toward perpendicular to the projection axis induces an eigenstate transition between the diagonal and constrained MBL phases. Intriguingly, the entanglement-entropy growth in constrained MBL follows a double-log form, whereas it changes to a power law in approaching the diagonal limit. By unveiling the significance of confined nonlocal effects in integrals of motion of constrained MBL, we show that this newfound insulating state is not a many-body Anderson insulator. Our predictions can be tested in Rydberg experiments.
description: 14 pages, 9 figures
Square root of an element in $PSL_2(\mathbb{F}_p)$, $SL_2(\mathbb{F}_p)$, $GL_2(\mathbb{F}_p)$ and $A_n$. Verbal width by set of squares in alternating group $A_n$ and Mathieu groups
Creators: name: Ruslan, Skuratovskii
Publisher: name: arXiv
Year: 2021
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20B27, 20E08, 20B22, 20B35, 20F65, 20B07

description: The problems of square root from group element existing in $SL_2(F_p)$, $PSL_2(F_p)$ and $GL_2(F_p)$ were solved. The similar goal of root finding was reached in the GM algorithm adjoining an $n$-th root of a generator results in a discrete group for group $PSL(2,R)$, but we consider this question over finite field $F_p$. Well known the Cayley-Hamilton method \cite{Pell} for computing the square roots of the matrix $M^n$ can give answer of square roots existing over finite field only after computation of $det M^n$ and some real Pell-Lucas numbers by using Bine formula. Over method gives answer about existing $\sqrt{ M^n}$ without exponents $M$ to $n$-th power. We use only trace of $M$ or only eigenvalues of $M$. In paper "Computing n-th roots in SL2 and Fibonacci polynomials" it was only the Anisotropic case of group $SL_1(Q)$ solved, where $Q$ is a quaternion division algebra over $k$ was considered. The authors of \cite{Amit} considered criterion to be square only for case $F_p$ is a field of characteristic not equal 2. We solve this problem even for fields $F_2$ and $F_{2^n}$. The criterion to $g \in SL_2 (F_2)$ be square in $SL_2(F_2)$ was not found by them what was declared in a separate sentence. The criterion of squareness in $A_n$ is presented. The necessary and sufficient conditions when an element of alternating group $g A_n$ and $GL_2(F_p)$ as well as for $SL_2(F_p)$ can be presented as a squares of one element are also found by us. Some necessary conditions to an element $g\in A_n$ being the square in $A_n$ are investigated. The criterion square root of an element existing in $PSL_2(\mathbb{F}_p)$ is found. The criterion of existing an element square root in $PSL_2(\mathbb{F}_p)$ is found.
Renato Perini, Scavi archeologici nella zona palafitticola di Fiavé-Carera, Parte I - II, Trento 1984 und 1987
Creators: name: Teegen, Wolf-Rüdiger
Publisher: name: DGUF e.V.
Year: 2017

description: Rezension zu: Scavi archeologici nella zona palafitticola di Fiavé-Carera. Parte I. Campagne 1969-1976. Situazione dei depositi e dei resti strutturali.  Renato Perini. Mit Geleitworten und Einleitungen von T. Andreolli, G. Fogolari, R. Wyss, U. Ruoff und naturwissenschaftlichen Beiträgen von J. Brochier, J. Greig, G. Jones & P. RowleyConwy, F. Schweingruber. Patriraonio storico e artistico dei Trentino (PSAT) 8. Trento 1984: Provincia Autonoma di Trento. Servizio Beni Culturali. Ohne ISBN. 361 S. mit 234 Abb., zahlreichen Tabellen und 3 Beilagen mit 5 Tafeln in Tasche. Leinen mit Schutzumschlag.

Rezension zu: Scavi archeologici nella zona palafitticola di Fiavé-Carera. Parte II. Campagne 19691976. Resti della cultura materiale: metallo osso
litica legno. Renato Perini. Mit einem Geleitwort von T. Andreolli und restauratorisch/ naturwissenschaftlichen Beiträgen von A. Kremer & D. Ankner & M. Hopf, R. Wyss, C. Gamble & R. Clark. Patrimonio storico e artistico dei Trentino (PSAT) 9. Trento 1987 [1988]: Provincia Autonoma di Trento. Servizio Beni Culturali. ISBN 8877020164.447 S. mit 61 Taf., 197 Abb. und zahlreichen Tabellen. Leinen mit Schutzumschlag.
description: Archäologische Informationen, Bd. 15, Nr. 1&2 (1992): Archäologische Informationen
Connections between the Generalized Marcum Q-Function and a class of Hypergeometric Functions
Creators: name: Morales-Jimenez, D.
name: Lopez-Martinez, F. J.
name: Martos-Naya, E.
name: Paris, J. F.
name: Lozano, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This paper presents a new connection between the generalized Marcum-Q function and the confluent hypergeometric function of two variables, phi3. This result is then applied to the closed-form characterization of the bivariate Nakagami-m distribution and of the distribution of the minimum eigenvalue of correlated non-central Wishart matrices, both important in communication theory. New expressions for the corresponding cumulative distributions are obtained and a number of communication-theoretic problems involving them are pointed out.
description: The manuscript has been submitted to IEEE Transactions on Information Theory. It contains 13 pages and 1 figure