cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Optimized compiler for Distributed Quantum Computing
Creators: name: Cuomo, Daniele
name: Caleffi, Marcello
name: Krsulich, Kevin
name: Tramonto, Filippo
name: Agliardi, Gabriele
name: Prati, Enrico
name: Cacciapuoti, Angela Sara
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Emerging Technologies (cs.ET)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Practical distributed quantum computing requires the development of efficient compilers, able to make quantum circuits compatible with some given hardware constraints. This problem is known to be tough, even for local computing. Here, we address it on distributed architectures. As generally assumed in this scenario, telegates represent the fundamental remote (inter-processor) operations. Each telegate consists of several tasks: i) entanglement generation and distribution, ii) local operations, and iii) classical communications. Entanglement generations and distribution is an expensive resource, as it is time-consuming and fault-prone. To mitigate its impact, we model an optimization problem that combines running-time minimization with the usage of that resource. Specifically, we provide a parametric ILP formulation, where the parameter denotes a time horizon (or time availability); the objective function count the number of used resources. To minimize the time, a binary search solves the subject ILP by iterating over the parameter. Ultimately, to enhance the solution space, we extend the formulation, by introducing a predicate that manipulates the circuit given in input and parallelizes telegates' tasks.
Effects of spin-orbit interaction and electron correlations in strontium titanate
Creators: name: Urazhdin, Sergei
name: Towsif, Ekram
name: Mitrofanov, Alexander
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We show that the Bloch states in the conduction band of SrTiO$_3$ arise from the interplay between highly anisotropic hopping in sub-bands derived from the Ti $t_{2g}$ orbitals and spin-orbit coupling that mixes these orbitals. Because of the nearly flat-band characteristics for one of the principal axes, at sufficiently high doping these Bloch states become unstable with respect to electron interactions, resulting in Mott-like singlet correlations. These findings may be relevant to the anomalous electronic properties of SrTiO$_3$, including its unusual superconductivity.
description: Version published in Phys. Rev. B
title: Energy From Waste : WP3.3 - Technology System Improvement Opportunity Report - Executive Summary
Creators: name: Hillier, G.
name: Donegan, S.
Publisher: name: ETI
Year: 2011
Subjects: subject: Bioenergy
subject: OTHER POWER and STORAGE TECHNOLOGIES (Electric power conversion)

description: This is the executive summary of the Work Package 3.3 Report which describes the findings and outputs from the technology system modelling work carried out by the consortium, with recommendations for technologies to be investigated further.
Entanglement Entropy from the Truncated Conformal Space
Creators: name: Palmai, T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A new numerical approach to entanglement entropies of the Renyi type is proposed for one-dimensional quantum field theories. The method extends the truncated conformal spectrum approach and we will demonstrate that it is especially suited to study the crossover from massless to massive behavior when the subsystem size is comparable to the correlation length. We apply it to different deformations of massless free fermions, corresponding to the scaling limit of the Ising model in transverse and longitudinal fields. For massive free fermions the exactly known crossover function is reproduced already in very small system sizes. The new method treats ground states and excited states on the same footing, and the applicability for excited states is illustrated by reproducing Renyi entropies of low-lying states in the transverse field Ising model.
description: 8 pages, 3 figures; v3: some typos corrected, figures replaced; v2: discussion in Sec. 2 expanded, some typos corrected, one new reference added
No solvable lambda-value term left behind
Creators: name: García-Pérez, Á.
name: Nogueira, P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: F.4.1

description: In the lambda calculus a term is solvable iff it is operationally relevant. Solvable terms are a superset of the terms that convert to a final result called normal form. Unsolvable terms are operationally irrelevant and can be equated without loss of consistency. There is a definition of solvability for the lambda-value calculus, called v-solvability, but it is not synonymous with operational relevance, some lambda-value normal forms are unsolvable, and unsolvables cannot be consistently equated. We provide a definition of solvability for the lambda-value calculus that does capture operational relevance and such that a consistent proof-theory can be constructed where unsolvables are equated attending to the number of arguments they take (their "order" in the jargon). The intuition is that in lambda-value the different sequentialisations of a computation can be distinguished operationally. We prove a version of the Genericity Lemma stating that unsolvable terms are generic and can be replaced by arbitrary terms of equal or greater order.
description: 43 pages
Entanglement based observables for quantum impurities
Creators: name: Stocker, Lidia
name: Sack, Stefan H.
name: Ferguson, Michael S.
name: Zilberberg, Oded
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum impurities exhibit fascinating many-body phenomena when the small interacting impurity changes the physics of a large noninteracting environment. The characterisation of such strongly correlated non-perturbative effects is particularly challenging due to the infinite size of the environment, and the inability of local correlators to capture the build-up of long-ranged entanglement in the system. Here, we harness an entanglement-based observable - the purity of the impurity - as a witness for the formation of strong correlations. We showcase the utility of our scheme by exactly solving the open Kondo box model in the small box limit, and thus describe all-electronic dot-cavity devices. Specifically, we conclusively characterise the metal-to-insulator phase transition in the system and identify how the (conducting) dot-lead Kondo singlet is quenched by an (insulating) intra-impurity singlet formation. Furthermore, we propose an experimentally feasible tomography protocol for the measurement of the purity, which motivates the observation of impurity physics through their entanglement build-up.
description: 6 pages, 4 figures, comments are welcome
The magnetic shear-current effect: generation of large-scale magnetic fields by the small-scale dynamo
Creators: name: Squire, Jonathan
name: Bhattacharjee, Amitava
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A novel large-scale dynamo mechanism, the magnetic shear-current effect, is discussed and explored. The effect relies on the interaction of magnetic fluctuations with a mean shear flow, meaning the saturated state of the small-scale dynamo can drive a large-scale dynamo -- in some sense the inverse of dynamo quenching. The dynamo is nonhelical, with the mean-field $α$ coefficient zero, and is caused by the interaction between an off-diagonal component of the turbulent resistivity and the stretching of the large-scale field by shear flow. Following up on previous numerical and analytic work, this paper presents further details of the numerical evidence for the effect, as well as an heuristic description of how magnetic fluctuations can interact with shear flow to produce the required electromotive force. The pressure response of the fluid is fundamental to this mechanism, which helps explain why the magnetic effect is stronger than its kinematic cousin, and the basic idea is related to the well-known lack of turbulent resistivity quenching by magnetic fluctuations. As well as being interesting for its applications to general high Reynolds number astrophysical turbulence, where strong small-scale magnetic fluctuations are expected to be prevalent, the magnetic shear-current effect is a likely candidate for large-scale dynamo in the unstratified regions of ionized accretion disks. Evidence for this is discussed, as well as future research directions and the challenges involved with understanding details of the effect in astrophysically relevant regimes.
title: Energy From Waste : WP4.1 - Project Framework Deliverable
Creators: name: Phillips, F.
Publisher: name: ETI
Year: 2009
Subjects: subject: Bioenergy
subject: OTHER POWER and STORAGE TECHNOLOGIES (Electric power conversion)

description: This deliverable is number 1 of 3 in Work Package 4. It documents the framework for project delivery and baseline assumptions for the benefits case to be prepared at the end of the project. To this end it specifically covers :The Technology Evaluation Criteria to allow the technologies assessed within the project to be compared;The financial modelling approach and key assumptions for the calculation of the benefits; andThe definition of the existing market and baseline technologies to compare against the proposed optimisation and improvements.
Multiscale modeling of polycrystalline graphene: A comparison of structure and defect energies of realistic samples from phase field crystal models
Creators: name: Hirvonen, Petri
name: Ervasti, Mikko M.
name: Fan, Zheyong
name: Jalalvand, Morteza
name: Seymour, Matthew
name: Allaei, S. Mehdi Vaez
name: Provatas, Nikolas
name: Harju, Ari
name: Elder, Ken R.
name: Ala-Nissila, Tapio
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We extend the phase field crystal (PFC) framework to quantitative modeling of polycrystalline graphene. PFC modeling is a powerful multiscale method for finding the ground state configurations of large realistic samples that can be further used to study their mechanical, thermal or electronic properties. By fitting to quantum-mechanical density functional theory (DFT) calculations, we show that the PFC approach is able to predict realistic formation energies and defect structures of grain boundaries. We provide an in-depth comparison of the formation energies between PFC, DFT and molecular dynamics (MD) calculations. The DFT and MD calculations are initialized using atomic configurations extracted from PFC ground states. Finally, we use the PFC approach to explicitly construct large realistic polycrystalline samples and characterize their properties using MD relaxation to demonstrate their quality.
description: 18 pages, 15 figures
New method to revisit the gravitational lensing analysis of the Bullet Cluster using radio waves
Creators: name: Yoon, Youngsub
name: Park, Jong-Chul
name: Hwang, Ho Seong
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Gravitational lensing studies of the Bullet Cluster suggested convincingly in favor of the existence of dark matter. However, it was performed without the knowledge of the original orientation of each galaxy before gravitational lensing. A potential improvement to this issue lies in the measurement of the original orientation from the polarization direction of radio waves emitted from each galaxy. In this context, Francfort et al. derived a formula that can utilize the information about the original orientation of each galaxy to obtain what is called {\it shear}. However, we demonstrate that shear in their formula should be replaced by {\it reduced shear} when the change in sizes of images of galaxies is taken into account. As the previous gravitational lensing analysis of the Bullet Cluster used reduced shear, we suggest applying our improved formula directly for the reanalysis once we obtain the polarization direction of radio waves. In particular, we show that our new formula can yield a more accurate analysis than the previous one, if the polarization direction can be measured more precisely than $10^\circ$. Moreover, the approach discussed in this work is generically applicable to the gravitational lensing analysis of clusters, not only limited to the Bullet Cluster.
description: 13 pages, 2 figures; published in JCAP
Fuentes de Información de la BVS - 2021 - Sesión II - Errata, retractación y comentarios en un artículo de revista
Creators: name: BIREME/OPS/OMS
name: Suga, Sueli Mitiko Yano
name: Silva, Lais Aparecida da
Publisher: name: Zenodo
Year: 2021
Subjects: Metodologia BVS
Red BVS

description: [ES] Sesion (02 de 06) Capacitación sobre las Fuentes de Información de la BVS para la Red AL&C_2021 Presentado por Sueli Suga Para bibliotecarios y profesionales de la red LILACS y BVS que contribuyen con la alimentación de la base de datos en el sistema FI-Admin. Presentación: 02:48 - Apertura 04:09 - ¿Por qué hablar de erratas? 11:43 - ¿Qué debe hacer el editor de una en estos casos revista? 17:07 - ¿Cuáles son los tipos de artículos utilizados para estas correciones? 18:01 - ¿Qué es una fe de erratas o erratas? 21:43 - Retratactación de Publicación 25:42 - Comentarios 51:04 - Tratamiento de errata de artículo de periódico en LILACS 32:11 - Acceso del FI-Admin 32:58 - Búsqueda por título de revista, vol., fas., e ano 34:20 - Revisión del registro en el sistema FI-Admin 45:22 - Informaciones generales 49:07 - Discusión Consulte la página general para tener acceso a la presentación: https://lilacs.bvsalud.org/es/sesiones-virtuales-lilacs/capacitacion-sobre-las-fuentes-de-informacion-de-la-bvs-para-la-red-latinoamericana-y-del-caribe-de-informacion-en-ciencias-de-la-salud_2021/
Gaussian Process Position-Dependent Feedforward: With Application to a Wire Bonder
Creators: name: van Haren, Max
name: Poot, Maurice
name: Kostić, Dragan
name: van Es, Robin
name: Portegies, Jim
name: Oomen, Tom
Publisher: name: arXiv
Year: 2022
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Mechatronic systems have increasingly stringent performance requirements for motion control, leading to a situation where many factors, such as position-dependency, cannot be neglected in feedforward control. The aim of this paper is to compensate for position-dependent effects by modeling feedforward parameters as a function of position. A framework to model and identify feedforward parameters as a continuous function of position is developed by combining Gaussian processes and feedforward parameter learning techniques. The framework results in a fully data-driven approach, which can be readily implemented for industrial control applications. The framework is experimentally validated and shows a significant performance increase on a commercial wire bonder.
description: in IEEE 17th International Conference on Advanced Motion Control, Padova, Italy, 2022
Semiclassical framed BPS states
Creators: name: Moore, Gregory W.
name: Royston, Andrew B.
name: Bleeken, Dieter Van den
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We provide a semiclassical description of framed BPS states in four-dimensional N = 2 super Yang-Mills theories probed by 't Hooft defects, in terms of a supersymmetric quantum mechanics on the moduli space of singular monopoles. Framed BPS states, like their ordinary counterparts in the theory without defects, are associated with the L^2 kernel of certain Dirac operators on moduli space, or equivalently with the L^2 cohomology of related Dolbeault operators. The Dirac/Dolbeault operators depend on two Cartan-valued Higgs vevs. We conjecture a map between these vevs and the Seiberg-Witten special coordinates, consistent with a one-loop analysis and checked in examples. The map incorporates all perturbative and nonperturbative corrections that are relevant for the semiclassical construction of BPS states, over a suitably defined weak coupling regime of the Coulomb branch. We use this map to translate wall crossing formulae and the no-exotics theorem to statements about the Dirac/Dolbeault operators. The no-exotics theorem, concerning the absence of nontrivial SU(2)_R representations in the BPS spectrum, implies that the kernel of the Dirac operator is chiral, and further translates into a statement that all L^2 cohomology of the Dolbeault operator is concentrated in the middle degree. Wall crossing formulae lead to detailed predictions for where the Dirac operators fail to be Fredholm and how their kernels jump. We explore these predictions in nontrivial examples. This paper explains the background and arguments behind the results announced in a short accompanying note.
description: v1: 161+78 pages, 5 figures; v2: typos corrected
Continuous-frequency weak electric field measurement with Rydberg atoms
Creators: name: Hu, Jinlian
name: Li, Huaqiang
name: Song, Rong
name: Bai, Jingxu
name: Jiao, Yuechun
name: Zhao, Jianming
name: Jia, Suotang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We demonstrate a continuous frequency electric field measurement based on the far off-resonant AC stark effect in a Rydberg atomic vapor cell. In this configuration, a strong far off-resonant field, denoted as a local oscillator (LO) field, acts as a gain shifting the Rydberg level to a high sensitivity region. An incident weak signal field with a few hundreds of kHz difference from the LO field is mixed with the LO field in Rydberg system to generate an intermediate frequency (IF) signal, which is read out by the Rydberg electromagnetically induced transparency (Rydberg-EIT) spectroscopy. Not like resonant EIT-AT spectra, we realize the electric field measurement of the signal frequency from 2 GHz to 5 GHz using a single Rydberg state. A minimum detectable filed strength is down to 2.31~$μ$V/cm and a linear dynamic range is over 65~dB. The minimum detectable filed is comparable with a resonant microwave-dressed Rydberg heterodyne receiver using the same system, which is 1.45~$μ$V/cm. We also show the system has an inherent polarization selectivity feature. Our method can provide a high sensitivity of electric field measurement and be extended to arbitrary frequency measurements.
description: 5 pages, 4 figures
Encircling the dark: constraining dark energy via cosmic density in spheres
Creators: name: Codis, S.
name: Pichon, C.
name: Bernardeau, F.
name: Uhlemann, C.
name: Prunet, S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The recently published analytic probability density function for the mildly non-linear cosmic density field within spherical cells is used to build a simple but accurate maximum likelihood estimate for the redshift evolution of the variance of the density, which, as expected, is shown to have smaller relative error than the sample variance. This estimator provides a competitive probe for the equation of state of dark energy, reaching a few percent accuracy on wp and wa for a Euclid-like survey. The corresponding likelihood function can take into account the configuration of the cells via their relative separations. A code to compute one-cell density probability density functions for arbitrary initial power spectrum, top-hat smoothing and various spherical collapse dynamics is made available online so as to provide straightforward means of testing the effect of alternative dark energy models and initial power-spectra on the low-redshift matter distribution.
description: 7 pages, replaced to match the MNRAS accepted version
Bauckham, Richard, The Testimony of the Beloved Disciple
Creators: name: Bartholomä, Philipp F.
Publisher: name: Jahrbuch für evangelikale Theologie
Year: 2025

description: 182335081X
description: Jahrbuch für evangelikale Theologie, V. 23 (2009): Jahrbuch für evangelikale Theologie, Band 23
Certification of a Nonprojective Qudit Measurement using Multiport Beamsplitters
Creators: name: Martínez, Daniel
name: Gómez, Esteban S.
name: Cariñe, Jaime
name: Pereira, Luciano
name: Delgado, Aldo
name: Walborn, Stephen P.
name: Tavakoli, Armin
name: Lima, Gustavo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Generalised quantum measurements go beyond the textbook concept of a projection onto an orthonormal basis in Hilbert space. They are not only of fundamental relevance but have also an important role in quantum information tasks. However, it is highly demanding to certify that a generalised measurement is indeed required to explain the results of a quantum experiment in which only the degrees of freedom are assumed to be known. Here, we use state-of-the-art multicore optical fiber technology to build multiport beamsplitters and faithfully implement a seven-outcome generalised measurement in a four-dimensional Hilbert space with a fidelity of $99.7\%$. We apply it to perform an elementary quantum communication task and demonstrate a success rate that cannot be simulated in any conceivable quantum protocol based on standard projective measurements on quantum messages of the same dimension. Our approach, which is compatible with modern photonic platforms, showcases an avenue for faithful and high-quality implementation of genuinely nonprojective quantum measurements beyond qubit systems.
description: 5 pages + references + appendices, 4 figures
Anderson, Paul N. / Just, Felix / Thatcher, S. J. und Tom (Hrsg.), John, Jesus, and History
Creators: name: Bartholomä, Philipp F.
Publisher: name: Jahrbuch für evangelikale Theologie
Year: 2025

description: 1823350801
description: Jahrbuch für evangelikale Theologie, V. 23 (2009): Jahrbuch für evangelikale Theologie, Band 23
Kappa-symmetry of superstring sigma model and generalized 10d supergravity equations
Creators: name: Tseytlin, A. A.
name: Wulff, L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We determine the constraints imposed on the 10d target superspace geometry by the requirement of classical kappa-symmetry of the Green-Schwarz superstring. In the type I case we find that the background must satisfy a generalization of type I supergravity equations. These equations depend on an arbitrary vector X_a and imply the one-loop scale invariance of the GS sigma model. In the special case when X_a is the gradient of a scalar ϕ(dilaton) one recovers the standard type I equations equivalent to the 2d Weyl invariance conditions of the superstring sigma model. In the type II case we find a generalized version of the 10d supergravity equations the bosonic part of which was introduced in arXiv:1511.05795. These equations depend on two vectors \X_a and K_a subject to 1st order differential relations (with the equations in the NS-NS sector depending only on the combination X_a = \X_a + K_a). In the special case of K_a=0 one finds that \X_a=\d_a ϕand thus obtains the standard type II supergravity equations. New generalized solutions are found if K_a is chosen to be a Killing vector (and thus they exist only if the metric admits an isometry). Non-trivial solutions of the generalized equations describe K-isometric backgrounds that can be mapped by T-duality to type II supergravity solutions with dilaton containing a linear isometry-breaking term. Examples of such backgrounds appeared recently in the context of integrable η-deformations of AdS_n x S^n sigma models. The classical kappa-symmetry thus does not, in general, imply the 2d Weyl invariance conditions for the GS sigma model (equivalent to type II supergravity equations) but only weaker scale invariance type conditions.
description: 24 pages; v2: Note and references added; v3: Minor clarifications and references added
Position-Dependent Snap Feedforward: A Gaussian Process Framework
Creators: name: van Haren, Max
name: Poot, Maurice
name: Portegies, Jim
name: Oomen, Tom
Publisher: name: arXiv
Year: 2022
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Mechatronic systems have increasingly high performance requirements for motion control. The low-frequency contribution of the flexible dynamics, i.e. the compliance, should be compensated for by means of snap feedforward to achieve high accuracy. Position-dependent compliance, which often occurs in motion systems, requires the snap feedforward parameter to be modeled as a function of position. Position-dependent compliance is compensated for by using a Gaussian process to model the snap feedforward parameter as a continuous function of position. A simulation of a flexible beam shows that a significant performance increase is achieved when using the Gaussian process snap feedforward parameter to compensate for position-dependent compliance.
description: To appear in: 2022 IEEE American Control Conference. arXiv admin note: text overlap with arXiv:2201.07511
Can decaying sterile neutrinos account for all dark matter?
Creators: name: Chan, Man Ho
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The recent discovery of unexplained X-ray line of $3.5-3.6$ keV emitted from the Perseus cluster of galaxies and M31 and the excess X-ray line of $8.7$ keV emitted from the Milky Way center may indicate that dark matter would decay. In this article, I show that approximately 80 \% of dark matter being 7.1 keV sterile neutrinos and 20 \% of dark matter being 17.4 keV sterile neutrinos can satisfactorily explain the observed X-ray lines and account for all missing mass. No free parameter is needed in this model. This scenario is also compatible with current robust observational constraints from the matter power spectrum in large-scale structures and would alleviate the challenges faced by the existing dark matter models.
description: Accepted in Astrophysics and Space Science
title: System Modelling Tool Kit - gCCS - a commercial system modelling environment for whole-chain CCS applications
Creators: name: Green, A.
name: Ramos, A.
Publisher: name: ETI
Year: 2017
Subjects: subject: Carbon Capture and Storage
subject: FOSSIL FUELS: OIL, GAS and COAL (CO2 Capture and Storage)

description: gCCS is the commercial system modelling environment for whole-chain CCS applications that has been developed through the ETI’s CCS System Modelling Took-Kit Project and is now commercially available from PSE. gCCS operates like many standard process flowsheeting tools, but unlike these it contains high-fidelity models of all major CCS operations. In addition, powerful modelling and solution capabilities mean that it can be used for detailed steady-state and dynamic simulation and optimisation across large sections of CCS networks.
Inelastic dark matter with spin-dependent couplings to protons and large modulation fractions in DAMA
Creators: name: Scopel, Stefano
name: Yoon, KookHyun
Publisher: name: arXiv
Year: 2015
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss a scenario where the DAMA modulation effect is explained by a Weakly Interacting Massive Particle (WIMP) which upscatters inelastically to a heavier state and predominantly couples to the spin of protons. In this scenario constraints from xenon and germanium targets are evaded dynamically, due to the suppression of the WIMP coupling to neutrons, while those from fluorine targets are evaded kinematically, because the minimal WIMP incoming speed required to trigger upscatters off fluorine exceeds the maximal WIMP velocity in the Galaxy, or is very close to it. In this scenario WIMP scatterings off sodium are usually sensitive to the large-speed tail of the WIMP velocity distribution and modulated fractions of the signal close to unity arise in a natural way. On the other hand, a halo-independent analysis with more conservative assumptions about the WIMP velocity distribution allows to extend the viable parameter space to configurations where large modulated fractions are not strictly necessary. We discuss large modulated fractions in the Maxwellian case showing that they imply a departure from the usual cosine time dependence of the expected signal in DAMA. However we explicitly show that the DAMA data is not sensitive to this distortion, both in time and frequency space, even in the extreme case of a 100 % modulated fraction. Moreover the same scenario provides an explanation of the maximum in the energy spectrum of the modulation amplitude detected by DAMA in terms of WIMPs whose minimal incoming speed matches the kinematic threshold for inelastic upscatters. For the elastic case the detection of such maximum suggests an inversion of the modulation phase below the present DAMA energy threshold, while this is not expected for inelastic scattering. This may allow to discriminate between the two scenarios in a future low-threshold analysis of the DAMA data.
description: 28 pages, 11 figures, updated to published version
Wagner, Thomas (Hrsg.), Neues Testament und Antike Kultur
Creators: name: Schnabel, Eckhard J.
Publisher: name: Jahrbuch für evangelikale Theologie
Year: 2025

description: 1823351395
description: Jahrbuch für evangelikale Theologie, V. 23 (2009): Jahrbuch für evangelikale Theologie, Band 23
One-loop superstring six-point amplitudes and anomalies in pure spinor superspace
Creators: name: Mafra, Carlos R.
name: Schlotterer, Oliver
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present the massless six-point one-loop amplitudes in the open and closed superstring using BRST cohomology arguments from the pure spinor formalism. The hexagon gauge anomaly is traced back to a class of kinematic factors in pure spinor superspace which were recently introduced as BRST pseudo-invariants. This complements previous work where BRST invariance arguments were used to derive the non-anomalous part of the amplitude. The associated worldsheet functions are non-singular and demonstrated to yield total derivatives on moduli space upon gauge variation. These cohomology considerations yield an efficient organizing principle for closed-string amplitudes that match expectations from S-duality in the low-energy limit.
description: harvmac TeX, 35 pages; v2: cosmetic changes, typos corrected, references updated, published version
Stable photon orbits in stationary axisymmetric electrovacuum spacetimes
Creators: name: Dolan, Sam R
name: Shipley, Jake O
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the existence and phenomenology of stable photon orbits (SPOs) in stationary axisymmetric electrovacuum spacetimes in four dimensions. First, we review the classification of equatorial circular photon orbits on Kerr-Newman spacetimes in the charge-spin plane. Second, using a Hamiltonian formulation, we show that Reissner-Nordström di-holes (a family encompassing the Majumdar-Papapetrou and Weyl-Bach special cases) admit SPOs, in a certain parameter regime that we investigate. Third, we explore the transition from order to chaos for typical SPOs bounded within a toroidal region around a di-hole, via a selection of Poincaré sections. Finally, for general axisymmetric stationary spacetimes, we show that the Einstein-Maxwell field equations allow for the existence of SPOs in electrovacuum; but not in pure vacuum.
description: 14 pages, 5 figures. Expanded version with two new figures and one appendix
Image encryption for Offshore wind power based on 2D-LCLM and Zhou Yi Eight Trigrams
Creators: name: Kou, Lei
name: Wu, Jinbo
name: Zhang, Fangfang
name: Ji, Peng
name: Ke, Wende
name: Wan, Junhe
name: Liu, Hailin
name: Li, Yang
name: Yuan, Quande
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cryptography and Security (cs.CR)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences
subject: E.3
subject: 68P25

description: Offshore wind power is an important part of the new power system, due to the complex and changing situation at ocean, its normal operation and maintenance cannot be done without information such as images, therefore, it is especially important to transmit the correct image in the process of information transmission. In this paper, we propose a new encryption algorithm for offshore wind power based on two-dimensional lagged complex logistic mapping (2D-LCLM) and Zhou Yi Eight Trigrams. Firstly, the initial value of the 2D-LCLM is constructed by the Sha-256 to associate the 2D-LCLM with the plaintext. Secondly, a new encryption rule is proposed from the Zhou Yi Eight Trigrams to obfuscate the pixel values and generate the round key. Then, 2D-LCLM is combined with the Zigzag to form an S-box. Finally, the simulation experiment of the algorithm is accomplished. The experimental results demonstrate that the algorithm can resistant common attacks and has prefect encryption performance.
description: accepted by Int. J. of Bio-Inspired Computation
The AGI Containment Problem
Creators: name: Babcock, James
name: Kramar, Janos
name: Yampolskiy, Roman
Publisher: name: arXiv
Year: 2016
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences
subject: I.2.0; I.2.m

description: There is considerable uncertainty about what properties, capabilities and motivations future AGIs will have. In some plausible scenarios, AGIs may pose security risks arising from accidents and defects. In order to mitigate these risks, prudent early AGI research teams will perform significant testing on their creations before use. Unfortunately, if an AGI has human-level or greater intelligence, testing itself may not be safe; some natural AGI goal systems create emergent incentives for AGIs to tamper with their test environments, make copies of themselves on the internet, or convince developers and operators to do dangerous things. In this paper, we survey the AGI containment problem - the question of how to build a container in which tests can be conducted safely and reliably, even on AGIs with unknown motivations and capabilities that could be dangerous. We identify requirements for AGI containers, available mechanisms, and weaknesses that need to be addressed.
On polynomial Trefftz spaces for the linear time-dependent Schrödinger equation
Creators: name: Gómez, Sergio
name: Moiola, Andrea
name: Perugia, Ilaria
name: Stocker, Paul
Publisher: name: arXiv
Year: 2023
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We study the approximation properties of complex-valued polynomial Trefftz spaces for the $(d+1)$-dimensional linear time-dependent Schrödinger equation. More precisely, we prove that for the space-time Trefftz discontinuous Galerkin variational formulation proposed by Gómez, Moiola (SIAM. J. Num. Anal. 60(2): 688-714, 2022), the same $h$-convergence rates as for polynomials of degree $p$ in $(d + 1)$ variables can be obtained in a mesh-dependent norm by using a space of Trefftz polynomials of anisotropic degree. For such a space, the dimension is equal to that of the space of polynomials of degree $2p$ in $d$ variables, and bases are easily constructed.
Black holes and the multiverse
Creators: name: Garriga, Jaume
name: Vilenkin, Alexander
name: Zhang, Jun
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Vacuum bubbles may nucleate and expand during the inflationary epoch in the early universe. After inflation ends, the bubbles quickly dissipate their kinetic energy; they come to rest with respect to the Hubble flow and eventually form black holes. The fate of the bubble itself depends on the resulting black hole mass. If the mass is smaller than a certain critical value, the bubble collapses to a singularity. Otherwise, the bubble interior inflates, forming a baby universe, which is connected to the exterior FRW region by a wormhole. A similar black hole formation mechanism operates for spherical domain walls nucleating during inflation. As an illustrative example, we studied the black hole mass spectrum in the domain wall scenario, assuming that domain walls interact with matter only gravitationally. Our results indicate that, depending on the model parameters, black holes produced in this scenario can have significant astrophysical effects and can even serve as dark matter or as seeds for supermassive black holes. The mechanism of black hole formation described in this paper is very generic and has important implications for the global structure of the universe. Baby universes inside super-critical black holes inflate eternally and nucleate bubbles of all vacua allowed by the underlying particle physics. The resulting multiverse has a very non-trivial spacetime structure, with a multitude of eternally inflating regions connected by wormholes. If a black hole population with the predicted mass spectrum is discovered, it could be regarded as evidence for inflation and for the existence of a multiverse.
description: 49 pages, 15 figures, matches version to appear in JCAP
Magnon corner states in twisted bilayer honeycomb magnets
Creators: name: Hua, Chun-Bo
name: Xiao, Feiping
name: Liu, Zheng-Rong
name: Sun, Jin-Hua
name: Gao, Jin-Hua
name: Chen, Chui-Zhen
name: Tong, Qingjun
name: Zhou, Bin
name: Xu, Dong-Hui
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Search for higher-order topological insulators, characterized by topologically protected gapless boundary states of codimension higher than one, in bosonic systems has attracted growing interest. Here, we establish twisted bilayer honeycomb magnets as a new platform for hosting second-order topological magnon insulators (SOTMIs) without fine-tuning. We employ a simple, minimal Heisenberg spin model to describe misaligned bilayer sheets of honeycomb ferromagnetic magnets with a large commensurate twist angle. We found that the higher-order topology in this bilayer system shows a significant dependence on the interlayer exchange coupling. The SOTMI, featuring topologically protected magnon corner states, appears for ferromagnetic interlayer couplings, while the twisted bilayer exhibits a nodal phase in the case of antiferromagnetic interlayer coupling.
description: Accepted for publication as a Letter in Phys. Rev. B
Believing in BERT: Using expressive communication to enhance trust and counteract operational error in physical Human-Robot Interaction
Creators: name: Hamacher, Adriana
name: Bianchi-Berthouze, Nadia
name: Pipe, Anthony G.
name: Eder, Kerstin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Robotics (cs.RO)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Strategies are necessary to mitigate the impact of unexpected behavior in collaborative robotics, and research to develop solutions is lacking. Our aim here was to explore the benefits of an affective interaction, as opposed to a more efficient, less error prone but non-communicative one. The experiment took the form of an omelet-making task, with a wide range of participants interacting directly with BERT2, a humanoid robot assistant. Having significant implications for design, results suggest that efficiency is not the most important aspect of performance for users; a personable, expressive robot was found to be preferable over a more efficient one, despite a considerable trade off in time taken to perform the task. Our findings also suggest that a robot exhibiting human-like characteristics may make users reluctant to 'hurt its feelings'; they may even lie in order to avoid this.
description: 8 pages, 4 figures
title: High Hydrogen - Experimental results, detailed analysis, evaluation and recommendations
Creators: name: Ewan, B.C.R.
name: Moodie, K.
name: Michels, H.J.
name: Rattigan, W.
name: Allen, J.T.
name: Hawksworth, S.
name: Christodolou, M.
Publisher: name: ETI
Year: 2017
Subjects: subject: Carbon Capture and Storage
subject: HYDROGEN and FUEL CELLS (Hydrogen - Hydrogen end uses (incl. combustion
subject: excl. fuel cells))

description: The report contains details for the complete project. This project commenced in 2011 and has completed works at the end of 2016.There have been three previous sections to this project: a literature review, laboratory scale experiments and a circular duct phase; this last phase incorporated a scale heat recovery steam generating boiler.

The project has been shown to be able to simulate several of the relevant features of a full scale HRSG system using the current scaled test rig and to demonstrate the development of flame through the system and the generation of pressures, which are believed to be relevant to the understanding of how these will develop at full scale.The commissioning tests carried out have given confidence in the overall operation of the test rig in terms of achieving appropriate gas temperatures, injected fuel mixtures and equivalence ratios; exhaust/injected fuel mixing and HRSG purging times ahead of actual ignition. Detailed flow measurements at selected positions within the system have confirmed the uniformity of the flow in these regions and have provided background turbulence data for future flow and combustion modelling.
Methods for Simulating TOF-PET in TOPAS Using a Low-Z Medium
Creators: name: Domurat-Sousa, Kepler
name: Poe, Cameron
Publisher: name: arXiv
Year: 2023
Subjects: subject: Medical Physics (physics.med-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We have used the TOPAS Geant4-based package to create a parametric simulation of a new TOF-PET scanner design based on a low atomic number scintillator. TOPAS was extended to provide complete information on individual particle position, energy, and identity, allowing access to all particle interactions in the simulation. The data were then used as the 'truth' information of particle kinematics for the simulation of the TOF-PET scanner, as described in a separate paper. The Derenzo and XCAT phantoms were added to the simulation with in-patient scattering, positron emission placement, and positron diffusion. Running Geant4 simulations through TOPAS requires substantially smaller amounts of user training than would be needed in raw Geant4. This paper describes the methods used to simulate the low-Z whole-body scanner at reduced dose. Specifically, this paper covers the simulation of the FDG decay energy spectrum; the simulation of tissue densities, atomic compositions, and radiotracer doses within imaging phantoms with doses; the custom TOPAS extension used to record particle interaction data; computational performance; and required Geant4 libraries used in TOPAS.
description: Updated to reflect publication edits, 12 pages, 5 figures
Impact of chiral asymmetry and magnetic field on passage of an energetic test parton in a QCD medium
Creators: name: Ghosh, Ritesh
name: Jamal, Mohammad Yousuf
name: Kurian, Manu
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the dependence of collisional energy loss of a test parton moving with a high velocity on the chiral imbalance and magnetic field in the QCD medium. A semi-classical approach is adopted to estimate the parton energy loss that takes into account the back-reaction on the parton due to the polarization effects of the QCD medium while traversing through the medium. We find that the motion of the parton is sensitive to the chiral asymmetry in the medium. Further, we investigate the effect of magnetic field-induced anisotropy on the energy transfer between the moving parton and the medium. Our results show that the energy loss of the parton is strongly influenced by the strength of the magnetic field as well as the relative orientation of the motion of the parton and the direction of the magnetic field in the medium.
description: 9 pages, 5 figures
Texture-induced spin-orbit coupling and Skyrmion-electron bound states in a Néel antiferromagnet
Creators: name: Davier, Naïmo
name: Ramazashvili, Revaz
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We derive effective-mass electron Hamiltonian for a Néel antiferromagnet in the presence of a smooth texture of the staggered magnetization. For certain locations of electron band extrema, the texture produces a peculiar and anomalously strong spin-orbit coupling of the scale $\hbar v / L$, with $v$ the Fermi velocity and $L$ the characteristic length scale of the texture. For a Skyrmion texture, this coupling generates electron bound states, whose energy scale is given by the gap $Δ$ in the electron spectrum. With dopant carriers, such bound states turn the Skyrmion into a charged particle, that can be manipulated by electric field.
description: Contribution to the collection in honor of Emmanuel I. Rashba, on his 95th birthday