cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Floquet-engineered pair and single particle filter in the Fermi Hubbard model
Creators: name: Hübner, Friedrich
name: Dauer, Christoph
name: Eggert, Sebastian
name: Kollath, Corinna
name: Sheikhan, Ameneh
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We investigate the Fermi-Hubbard model with a Floquet-driven impurity in the form of a local time-oscillating potential. For strong attractive interactions a stable formation of pairs is observed. These pairs show a completely different transmission behavior than the transmission that is observed for the single unpaired particles. Whereas in the high frequency limit the single particles show a maximum of the transition at low driving amplitudes, the pairs display a pronounced maximum transmission when the amplitude of the driving lies close to the ratio of the interaction U and the driving frequency ω. We use the distinct transmission behaviour to design filters for pairs or single particles, respectively. For example one can totally block the transmission of single particles through the driven impurity and allow only for the transmission of pairs. We quantify the quality of the designed filters.
A perturbation approach to Translational Gravity
Creators: name: Julve, J.
name: Tiemblo, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Within a gauge formulation of 3+1 gravity relying on a nonlinear realization of the group of isometries of space-time, a natural expansion of the metric tensor arises and a simple choice of the gravity dynamical variables is possible. We show that the expansion parameter can be identified with the gravitational constant and that the first order depends only on a diagonal matrix in the ensuing perturbation approach. The explicit first order solution is calculated in the static isotropic case, and its general structure is worked out in the harmonic gauge.
description: 13 pages. Abstract mistaken in previous version. Submitted to IJGMMP. arXiv admin note: substantial text overlap with arXiv:1007.0342
Five Starter Pieces: Quantum Information Science via Semi-definite Programs
Creators: name: Siddhu, Vikesh
name: Tayur, Sridhar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Optimization and Control (math.OC)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: As the title indicates, this chapter presents a brief, self-contained introduction to five fundamental problems in Quantum Information Science (QIS) that are especially well-suited to be formulated as Semi-definite Programs (SDP). We have in mind two audiences. The primary audience comprises of Operations Research (and Computer Science) graduate students who have familiarity with SDPs, but have found it daunting to become even minimally conversant with pre-requisites of QIS. The second audience consists of Physicists (and Electrical Engineers) already knowledgeable with modeling of QIS via SDP but interested in computational tools that are applicable more generally. For both audiences, we strive for rapid access to the unfamiliar material. For the first, we provide just enough required background material (from Quantum Mechanics, treated via matrices, and mapping them in Dirac notation) and simultaneously for the second audience we recreate, computationally in Jupyter notebooks, known closed-form solutions. We hope you will enjoy this introduction and gain understanding of the marvelous connection between SDP and QIS by self-study, or as a short seminar course. Ultimately, we hope this disciplinary outreach will fuel advances in QIS through their fruitful study via SDPs.
description: 38 pages, 4 figures, and some relevant code, see https://github.com/vsiddhu/SDP-Quantum-OR, included here. v3 essentially matches published version
title: Desde el sur : la Revolución Rusa y América Latina
Creators: name: Acha, Omar
name: Herrera, Carlos Miguel
Publisher: name: Politika.io
Year: 2019

description: Partiendo de la producción histórica latinoamericana en ocasión del centenario de la Revolución Rusa de 1917, y en continuidad con un congreso organizado por la Université de Cergy-Pontoise en noviembre de 2017 sobre las proyecciones del acontecimiento en América Latina, Omar Acha (autor del capítulo conclusivo del libro surgido de esa reunión), y Carlos Herrera, uno de sus organizadores, realizan un intercambio sobre el estado de la investigación, sus avances y sus impasses, esbozando una agenda futura. Una agenda que involucra, de hecho, regresar sobre el concepto de revolución, el centenario como temporalidad, el comparatismo en una visión postcolonial, e incluso las particularidades que supone un relato desde América Latina, entre otros problemas historiográficos y políticos.
CMOS-compatible Ising and Potts Annealing Using Single Photon Avalanche Diodes
Creators: name: Whitehead, William
name: Nelson, Zachary
name: Camsari, Kerem Y.
name: Theogarajan, Luke
Publisher: name: arXiv
Year: 2022
Subjects: subject: Emerging Technologies (cs.ET)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Applied Physics (physics.app-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Massively parallel annealing processors may offer superior performance for a wide range of sampling and optimization problems. A key component dictating the size of these processors is the neuron update circuit, ideally implemented using special stochastic nanodevices. We leverage photon statistics using single photon avalanche diodes (SPADs) and temporal filtering to generate stochastic states. This method is a powerful alternative offering unique features not currently seen in annealing processors: the ability to continuously control the computational temperature and the seamless extension to the Potts model, a $n$-state generalization of the two-state Ising model. SPADs also offer a considerable practical advantage since they are readily manufacturable in current standard CMOS processes. As a first step towards realizing a CMOS SPAD-based annealer, we have designed Ising and Potts models driven by an array of discrete SPADs and show they accurately sample from their theoretical distributions.
Light $Z^\prime$ and Dirac fermion dark matter in the $B-L$ model
Creators: name: Nath, Newton
name: Okada, Nobuchika
name: Okada, Satomi
name: Raut, Digesh
name: Shafi, Qaisar
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We consider a $U(1)_{B-L}$ model with a $Z^\prime$ portal Dirac fermion dark matter (DM) $χ$ of low mass which couples very weakly to the $B - L$ gauge boson $Z^\prime$. An arbitrary $B-L$ charge $Q\neq \pm1, \pm 3$ of the DM $χ$ ensures its stability. Motivated by the sensitivity reach of forthcoming "Lifetime Frontier" experiments, we focus on the $Z^\prime$ mass, $m_{Z^\prime}$, in the sub-GeV to few GeV range. To evaluate the DM relic abundance, we examine both the freeze-out and freeze-in DM scenarios. For the freeze-out scenario, we show that the observed DM abundance is reproduced near the $Z^\prime$ resonance, $m_χ\simeq m_{Z^\prime}/2$, where $m_χ$ is the DM mass. For the freeze-in scenario, we focus on $m_χ\ll m_{Z^\prime}$. We show that for a fixed value of $m_{Z^\prime}$, $g_{BL}$ values roughly scale as $1/Q$ to reproduce the observed DM abundance. For various $Q$ values in the range between $10^{-6}$ and $10^2$, we show that the gauge coupling values $g_{BL}$ needed to reproduce the observed DM abundance lie in the search reach of future planned and/or proposed experiments such as FASER, Belle-II, LDMX, and SHiP. In the freeze-in case, the $Q$ values to realize observable $g_{BL}$ values are found to be much smaller than that in the freeze-out case.
description: 14 pages, 3 figures, revised section III with new Figure 1
Epsilon-regularity for Griffith almost-minimizers in any dimension under a separating condition
Creators: name: Labourie, Camille
name: Lemenant, Antoine
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 49Q20

description: In this paper we prove that if (u, K) is an almost-minimizer of the Griffith functional and K is $ε$-close to a plane in some ball B $\subset$ R N while separating the ball B in two big parts, then K is C 1,$α$ in a slightly smaller ball. Our result contains and generalizes the 2 dimensional result of [4], with a different and more sophisticate approach inspired by [23, 24], using also [20] in order to adapt a part of the argument to Griffith minimizers.
description: Minor corrections
Parametric resonance of spin waves in ferromagnetic nanowires tuned by spin Hall torque
Creators: name: Yang, Liu
name: Jara, Alejandro A.
name: Duan, Zheng
name: Smith, Andrew
name: Youngblood, Brian
name: Arias, Rodrigo E.
name: Krivorotov, Ilya N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a joint experimental and theoretical study of parametric resonance of spin wave eigenmodes in Ni$_{80}$Fe$_{20}$/Pt bilayer nanowires. Using electrically detected magnetic resonance, we measure the spectrum of spin wave eigenmodes in transversely magnetized nanowires and study parametric excitation of these eigenmodes by a microwave magnetic field. We also develop an analytical theory of spin wave eigenmodes and their parametric excitation in the nanowire geometry that takes into account magnetic dilution at the nanowire edges. We measure tuning of the parametric resonance threshold by antidamping spin Hall torque from a direct current for the edge and bulk eigenmodes, which allows us to independently evaluate frequency, damping and ellipticity of the modes. We find good agreement between theory and experiment for parametric resonance of the bulk eigenmodes but significant discrepancies arise for the edge modes. The data reveals that ellipticity of the edge modes is significantly lower than expected, which can be attributed to strong modification of magnetism at the nanowire edges. Our work demonstrates that parametric resonance of spin wave eigenmodes is a sensitive probe of magnetic properties at edges of thin-film nanomagnets.
description: 24 pages, 9 figures
Interval Valued Fuzzy Modeling and Indirect Adaptive Control of Quadrotor
Creators: name: Bouhentala, Moufid
name: Ghanai, Mouna
name: Chafaa, Kheireddine
Publisher: name: arXiv
Year: 2022
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, a combination of fuzzy clustering estimation and sliding mode control is used to control a quadrotor system, whose mathematical model is complex and has unknown elements, including structure, parameters, and so on. In addition, they may be affected by external environmental disturbances. At first, the nonlinear unknown part of the system is estimated by a fuzzy model, A new method is presented for constructing a Takagi-Sugeno (TS) interval-valued fuzzy model (IVFM) based on inputoutput data of the identified system. Following the construction of the fuzzy model that estimates the unknown part of the quadrotor system, a control and on-line adjusting of the fuzzy modeled part of dynamics is used. In this step, the system model will be estimated in adaptive form so that the dynamic equations can be used in sliding mode control. Finally, the proposed technique is applied, and the simulation results are presented to show the effectiveness of this approach in controlling the quadrotor with unknown nonlinear dynamics.
description: 25 pages
Realization of Dirac quantization in loop quantum gravity
Creators: name: Zhang, Xiangdong
name: Ma, Yongge
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The system of gravity coupled to the non-rotational dust field is studied at both classical and quantum levels. The scalar constraint of the system can be written in the form of a true physical Hamiltonian with respect to the dust time. In the framework of loop quantum gravity, the scalar constraint is promoted to a well-defined operator in a suitable Hilbert space of the coupled system, such that the physical Hamiltonian becomes a symmetric operator. By the deparametrized form, a general expression of the solutions to the quantum scalar constraint is obtained, and the observables on the space of solutions can be constructed. Moreover, the Dirac quantization procedure can be fully carried out in loop quantum gravity by this system.
description: 6 pages
Connection Between Mid-Infrared Emission Properties and Narrow Line Region Outflows in Type 1 Active Galactic Nuclei
Creators: name: Zhang, Kai
name: Wang, Ting-Gui
name: Yan, Lin
name: Dong, Xiao-Bo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The location of warm dust producing the Mid-infrared (MIR) emission in Type 1 Active Galactic Nuclei (AGNs) is complex and not yet fully known. We explore this problem by studying how the MIR covering factor (CF_{MIR} =L_{MIR}/L_{bol}) correlates with the fundamental parameters of AGN accretion process (such as L_{bol}, black hole mass MBH, and Eddington ratio L/LEdd) and the properties of narrow emission lines (as represented by [O III] 5007), using large data sets derived from the Sloan Digital Sky Spectroscopic Survey (SDSS) and the Wide Infrared Sky Survey (WISE). Firstly we find that the luminosity of the [O III] wing component (Lwing) correlates more tightly with the continuum luminosity (L5100) than the luminosity of the line core component (Lcore) does, which is in line with our previous conclusion that the wing component, generally blueshifted, originates from the polar outflows in the inner narrow-line region (NLR). We then find that the MIR CF shows the strongest correlation with Lwing/L_{bol} rather than with Lcore/L_{bol} or the above fundamental AGN parameters, and the correlation becomes stronger as the infrared wavelength increases. We also confirm the anti-correlations of CF_{MIR} with L_{bol} and MBH, and the lack of dependence of CF_{MIR} on the Eddington ratio. These results suggest that a large fraction of the warm dust producing MIR emission in AGNs is likely embedded in polar outflows in the NLR instead of in the torus.
description: 8 pages, 4 figures, 1 table, ApJ accepted
title: Waste Heat Recovery at the Steel and Rolling Mill “Marienhütte”, Graz (Austria)
Creators: name: Waste Heat Recovery at the Steel and Rolling Mill “Marienhütte”, Graz (Austria)
Publisher: name: Alexander Arnitz for Heat Pump Centre
Year: 2019

description: A long-standing cooperation between two companies, the energy service provider and district heating network
 operator Energie Graz GmbH & Co KG and the steel and rolling mill Marienhütte GmbH, has resulted in a project that is economically viable for both partners and ecologically valuable for the Graz region (Austria). Due to the installation of two highly efficient large heat pumps, waste heat from the steel and rolling mill Marienhütte GmbH can be used to deliver environmentally friendly heat to the existing district heating network in Graz.
Sublimable complexes with spin switching: Chemical design, processing as thin films and integration in graphene-based devices
Creators: name: Gavara-Edo, Miguel
name: Valverde-Muñoz, Francisco Javier
name: Córdoba, Rosa
name: Muñoz, M. Carmen
name: Herrero-Martín, Javier
name: Real, José Antonio
name: Coronado, Eugenio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Among the different types of switchable molecular compounds, sublimable Fe(II) SCO molecules provide a suitable platform to develop smart devices that respond to external stimuli. Here we report the synthesis, crystallographic structure and magnetic properties of three new neutral Fe(II) SCO molecules belonging to the {Fe[H2B(pz)2]2(L)} family with bidentate-alpha-diimine ligands L = 3-(pyridin-2-yl)-[1,2,3]triazolo[1,5-a]pyridine (tzpy), 5,5,6,6-tetrahydro-4H,4H-2,2-bi(1,3-thiazine) (btz) and 4,4,5,5-tetrahydro-2,2-bithiazole (bt) (1, 2 and 3, respectively), as well as two solvated forms of 1 and 3. All three desolvated compounds present thermal- and light-induced SCO transitions with different degrees of cooperativity and effectiveness. Furthermore, 1 and 2 are demonstrated to be sublimable under HV conditions affording homogeneous thin films 200 nm thick (TF1 and TF2) that retain the chemical integrity of the original molecules regardless the deposition surface. The SCO behaviour of the films is characterized by XAS technique revealing the partial retainment of both thermal- and light-induced spin transitions, yet losing the cooperativity. Finally, SCO/2D horizontal hybrid devices based on CVD-graphene are produced using these films. Being the first ones of this type utilizing molecules of {Fe[H2B(pz)2]2(L)} family, with L = tzpy and btz, the devices have allowed the successful detection of the thermal SCO transition through the electric properties of the CVD-graphene.
description: 20 pages, 8 figures
Ab initio simulation of laser-induced electronic and vibrational coherence
Creators: name: Krumland, Jannis
name: Jacobs, Matheus
name: Cocchi, Caterina
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The atomistic resolution recently achieved by ultrafast spectroscopies demands corresponding theoretical advances. Real-time time-dependent density-functional theory (RT-TDDFT) with Ehrenfest dynamics offers an optimal trade-off between accuracy and computational costs to study electronic and vibrational dynamics of laser-excited materials in the sub-picosecond regime. However, this approach is unable to account for thermal effects or zero-point energies which are crucial in the physics involved. Herein, we adopt a quantum-semiclassical method based on RT-TDDFT+Ehrenfest to simulate laser-induced electronic and vibrational coherences in condensed matter. With the example of carbon-conjugated molecules, we show that ensemble-averaging with initial configurations from a nuclear quantum distribution remedies many shortcomings of single-trajectory RT-TDDFT+Ehrenfest, damping electronic coherence and introducing ultrafast non-adiabatic coupling between excited states. As the number of sampled configurations decreases with size and rigidity of the compounds, computational costs remain moderate for large systems for which mean-field approaches shine. The explicit inclusion of a time-dependent pulse in the simulations makes this method a prime advance for first-principles studies of coherent nonlinear spectroscopy as an independent counterpart to experimental results.
Weyl estimates for spacelike hypersurfaces in de Sitter space
Creators: name: Ballesteros-Chavez, Daniel
name: Klingenberg, Wilhelm
name: Lambert, Ben
Publisher: name: arXiv
Year: 2021
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We study the isometric spacelike embedding problem in scaled de Sitter space, and obtain Weyl-type estimates and the corresponding closedness in the space of embeddings.
Relevance of coordinate and particle-number scaling in density functional theory
Creators: name: Fabiano, Eduardo
name: Constantin, Lucian A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We discuss a $β$-dependent family of electronic density scalings of the form $n_λ(\R)=λ^{3β+1}\; n(λ^β\R)$ in the context of density functional theory. In particular, we consider the following special cases: the Thomas-Fermi scaling ($β=1/3$ and $λ\gg 1$), which is crucial for the semiclassical theory of neutral atoms; the uniform-electron-gas scaling ($β=-1/3$ and $λ\gg 1$), that is important in the semiclassical theory of metallic clusters; the homogeneous density scaling ($β=0$) which can be related to the self-interaction problem in density functional theory when $λ\leq 1$; the fractional scaling ($β=1$ and $λ\leq 1$), that is important for atom and molecule fragmentation; and the strong-correlation scaling ($β=-1$ and $λ\gg 1$) that is important to describe the strong correlation limit. The results of our work provide evidence for the importance of this family of scalings in semiclassical and quantum theory of electronic systems, and indicate that these scaling properties must be considered as important constraints in the construction of new approximate density functionals. We also show, using the uniform-electron-gas scaling, that the curvature energy of metallic clusters is related to the second-order gradient expansion of kinetic and exchange-correlation energies.
description: 13 pages, 3 figures, accepted for publication on PRA
A bioeconomic analysis of site-specific management and delayed planting strategies for weed control
Creators: name: Oriade, Caleb Adewale
name: Oriade, Caleb Adewale
Publisher: name: Unknown
Year: 1995
Subjects: Crop Production/Industries

description: The potential economic and environmental benefits of two emerging tools for low input weed management are examined in this research. Site-specific weed management (SSM) prescribes herbicide treatment for only the portion of a field exposed to weed infestations, rather than the entire field. Delayed planting allows weeds to emerge prior to planting. Since these weeds are eliminated during pre-plant tillage operations, the potential for subsequent weed problems is greatly reduced. The potential benefits of these instruments are simulated using a variant of WEEDSIM, a dynamic bioeconomic weed management model. Differences in model performance under SSM and delayed planting strategies as compared to performance under standard practices impute value to these weed control tools. Simulations with the model were conducted within a deterministic framework. Simulated results suggest that patchiness in weed distributions is the most crucial factor justifying the use of SSM. Other factors such as weed populations and weed species mixes only play secondary roles. There is a substantial environmental gain from SSM practices under a considerably high degree of weed pressure and aggregation. However, the impact of such practices on profit is generally modest. For this reason, it is doubtful if farmers will be willing to adopt this strategy without some public support, particularly when cost and risk considerations are factored in. Outcomes from static simulation experiments for delayed planting strategy suggest that the practice can be a valuable instrument for optimizing net income and herbicide use, especially at high weed populations. The practice may lead to an effective control of pre-plant weeds through mechanical means to the extent that the use of pre-emergence herbicides is not required. Furthermore, the economic benefits of delayed planting strategies are not sensitive to hybrid varieties and rotational practices in the short run. In view of the desirable environmental attributes of these two strategies, their use deserves support. Cheap and affordable technology, cheap and easy access to information on weed population dynamics and crop yield-planting date relationships are means of enhancing the adoption of these environmentally-friendly practices.
description: University of Minnesota. Major advisor: Robert P. King
Investigating the Electromechanical Behavior of Unconventionally Ferroelectric $Hf_{0.5}Zr_{0.5}O_{2}$-based Capacitors Through Operando Nanobeam X-ray Diffraction
Creators: name: Stylianidis, Evgenios
name: Surabhi, Pranav
name: Hamming-Green, Ruben
name: Salverda, Mart
name: Wei, Yingfen
name: Burema, Arjan
name: Matzen, Sylvia
name: Banerjee, Tamalika
name: Björling, Alexander
name: Mukherjee, Binayak
name: Dutta, Sangita
name: Aramberri, Hugo
name: Íñiguez, Jorge
name: Noheda, Beatriz
name: Carbone, Dina
name: Nukala, Pavan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Understanding various aspects of ferroelectricity in hafnia-based nanomaterials is of vital importance for the development of future non-volatile memory and logic devices. Here, the unconventional and weak electromechanical response of epitaxial $La_{0.67}Sr_{0.33}MnO_{3}$/$Hf_{0.5}Zr_{0.5}O_{2}$/$La_{0.67}Sr_{0.33}MnO_{3}$ ferroelectric capacitors is investigated, via the sensitivity offered by nanobeam X-ray diffraction experiments during application of electrical bias. It is shown that the pristine rhombohedral phase exhibits a negative linear piezoelectric effect with piezoelectric coefficient ($d_{33}$) ~ -0.5 to -0.8 pm$V^{-1}$. First-principles calculations support an intrinsic negative piezoresponse. In addition, it is found that the piezoelectric response is suppressed above the coercive voltage. For higher voltages, and with the onset of DC conductivity throughout the capacitor, a second-order effect is observed. The electromechanical response observed in this work is clearly different from that of normal ferroelectrics, again underlining the unconventional nature of polarization switching in the samples.
Quantum memories for fundamental science in space
Creators: name: Mol, Jan-Michael
name: Esguerra, Luisa
name: Meister, Matthias
name: Bruschi, David Edward
name: Schell, Andreas Wolfgang
name: Wolters, Janik
name: Wörner, Lisa
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Investigating and verifying the connections between the foundations of quantum mechanics and general relativity will require extremely sensitive quantum experiments. To provide ultimate insight into this fascinating area of physics, the realization of dedicated experiments in space will sooner or later become a necessity. Quantum technologies, and among them quantum memories in particular, are providing novel approaches to reach conclusive experimental results due to their advanced state of development backed by decades of progress. Storing quantum states for prolonged time will make it possible to study Bell tests on astronomical baselines, to increase measurement precision for investigations of gravitational effects on quantum systems, or enable distributed networks of quantum sensors and clocks. We here promote the case of exploiting quantum memories for fundamental physics in space, and discuss both distinct experiments as well as potential quantum memory platforms and their performance.
description: 33 pages, 5 figures, 1 table
title: Industrial Heat Pumps – Good examples from  ongoing Annex
Creators: name: Industrial Heat Pumps – Good examples from  ongoing Annex
Publisher: name: Heat Pump Centre
Year: 2019

description: Even though heat pumps often are thought of as domestic products, they do have a large potential also in industrial implementations. However, such implementations may imply significant challenges. The challenges are connected to the fact that each solution often must be tailor-made to fit a specific application. Despite this, industrial use of heat pumps could be given much more credibility than what is currently done. This issue of HPT Magazine focuses on industrial heat pumps and shows examples of applications.
Inelastic Dark Matter from Dark Higgs Boson Decays at FASER
Creators: name: Li, Jinmian
name: Nomura, Takaaki
name: Shimomura, Takashi
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider inelastic dark matter scenarios with dark photon mediator and a dark Higgs boson. The dark Higgs boson spontaneously breaks the gauge symmetry associated with the dark photon, and gives the mass to the dark photon and the mass difference to dark particles. Such a dark Higgs boson can decay into the dark particles and hence can be another source of the dark particles at collider experiments. We analyze the sensitivity to decays of the excited state into the dark matter and charged particles at the FASER 2 experiment in fermion and scalar inelastic dark matter scenarios. We consider two mass spectra as illustrating examples in which the excited state can be produced only through the decay of dark Higgs boson. We show that unprobed parameter region can be explored in fermion dark matter scenario for the illustrating mass spectra.
description: 19pages, 4 figures
Distant galaxy clusters in the XMM Large Scale Structure survey
Creators: name: Willis, J. P.
name: Clerc, N.
name: Bremer, M. N.
name: Pierre, M.
name: Adami, C.
name: Ilbert, O.
name: Maughan, B.
name: Maurogordato, S.
name: Pacaud, F.
name: Valtchanov, I.
name: Chiappetti, L.
name: Thanjavur, K.
name: Gwyn, S.
name: Stanway, E. R.
name: Winkworth, C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: (Abridged) Distant galaxy clusters provide important tests of the growth of large scale structure in addition to highlighting the process of galaxy evolution in a consistently defined environment at large look back time. We present a sample of 22 distant (z>0.8) galaxy clusters and cluster candidates selected from the 9 deg2 footprint of the overlapping X-ray Multi Mirror (XMM) Large Scale Structure (LSS), CFHTLS Wide and Spitzer SWIRE surveys. Clusters are selected as extended X-ray sources with an accompanying overdensity of galaxies displaying optical to mid-infrared photometry consistent with z>0.8. Nine clusters have confirmed spectroscopic redshifts in the interval 0.80.8 clusters.
description: Accepted by MNRAS, 25 pages, 15 figures
MOPRD: A multidisciplinary open peer review dataset
Creators: name: Lin, Jialiang
name: Song, Jiaxin
name: Zhou, Zhangping
name: Chen, Yidong
name: Shi, Xiaodong
Publisher: name: arXiv
Year: 2022
Subjects: subject: Digital Libraries (cs.DL)
subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Open peer review is a growing trend in academic publications. Public access to peer review data can benefit both the academic and publishing communities. It also serves as a great support to studies on review comment generation and further to the realization of automated scholarly paper review. However, most of the existing peer review datasets do not provide data that cover the whole peer review process. Apart from this, their data are not diversified enough as the data are mainly collected from the field of computer science. These two drawbacks of the currently available peer review datasets need to be addressed to unlock more opportunities for related studies. In response, we construct MOPRD, a multidisciplinary open peer review dataset. This dataset consists of paper metadata, multiple version manuscripts, review comments, meta-reviews, author's rebuttal letters, and editorial decisions. Moreover, we propose a modular guided review comment generation method based on MOPRD. Experiments show that our method delivers better performance as indicated by both automatic metrics and human evaluation. We also explore other potential applications of MOPRD, including meta-review generation, editorial decision prediction, author rebuttal generation, and scientometric analysis. MOPRD is a strong endorsement for further studies in peer review-related research and other applications.
description: Please cite the version of Neural Computing and Applications
Holographic Quantum Scars
Creators: name: Liska, Diego
name: Gritsev, Vladimir
name: Vleeshouwers, Ward
name: Minář, Jiří
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We discuss a construction of quantum many-body scars in the context of holography. We consider two-dimensional conformal field theories and use their dynamical symmetries, naturally realized through the Virasoro algebra, to construct scarred states. By studying their Loschmidt amplitude, we evaluate the states' periodic properties. A geometrical interpretation allows us to compute the expectation value of the stress tensor and entanglement entropy of these scarred states. We show that their holographic dual is related by a diffeomorphism to empty AdS, even for energies above the black hole threshold. We also demonstrate that expectation values in the scarred states are generally non-thermal and that their entanglement entropy grows with the energy as $\log(E)$ in contrast to $\sqrt{E}$ for the typical (bulk) states. Furthermore, we identify fixed points on the CFT plane associated with divergent or vanishing entanglement entropy in the limit where the scarred states have infinite energy.
description: 22 pages + References, 3 figures; The updated version contains new references, added footnotes 4, 11 and 13, and a new remark after the introduction
title: No subject for the inexperienced (poems)
Creators: name: Everest, Clay
Publisher: name: Memorial University of Newfoundland
Year: 2019

description: No Subject for the Inexperienced is a collection of poems that explores the commodification of disaster narratives in the tourism industry and how these curated narratives influence our understanding of place. Focusing primarily on the relationship between the city of Halifax, the sinking of the Titanic, and the Halifax Explosion, the poems investigate how history is experienced and consumed by those within and without the culture, using a range of perspectives and materials. Museum artifacts, tourist brochures, as well local attractions are used to underscore their own commodification. A series of unreliable narrators, such as a conspiracy theorist, TripAdvisor reviewers, and a talkative barfly, reveal their own agendas as consumers and producers of culture. Finally, the collapse of a fictional relationship invites a consideration of how an author selectively creates and presents a private narrative to an audience, paralleling the larger public curation of history and culture. Through this collision of narratives, voices, and ephemera dealing with loss, No Subject for the Inexperienced ultimately critiques the ethics of ‘knowing’ a past, how history is packaged and sold in the present, and how our own relationships with place and history are influenced by the recirculation of these narratives.
Towards the classification of integrable differential-difference equations in 2 + 1 dimensions
Creators: name: Ferapontov, E. V.
name: Novikov, V. S.
name: Roustemoglou, I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: 35Q51, 37K10

description: We address the problem of classification of integrable differential-difference equations in 2+1 dimensions with one/two discrete variables. Our approach is based on the method of hydrodynamic reductions and its generalisation to dispersive equations. We obtain a number of classification results of scalar integrable equations including that of the intermediate long wave and Toda type.
description: 16 pages
Carex gracilis Opiz
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: A. gracilis Opiz (A. micansBuser) Cat. 137. l: Val d'Illiez (J.); Col de Balme (J.).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Gravity and the Crossed Product
Creators: name: Witten, Edward
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Recently Leutheusser and Liu [1,2] identified an emergent algebra of Type III$_1$ in the operator algebra of ${\mathcal N}=4$ super Yang-Mills theory for large $N$. Here we describe some $1/N$ corrections to this picture and show that the emergent Type III$_1$ algebra becomes an algebra of Type II$_\infty$. The Type II$_\infty$ algebra is the crossed product of the Type III$_1$ algebra by its modular automorphism group. In the context of the emergent Type II$_\infty$ algebra, the entropy of a black hole state is well-defined up to an additive constant, independent of the state. This is somewhat analogous to entropy in classical physics.
description: 28 pp, a number of corrections in v. 2, minor corrections in v. 3,4,5
Tensor Products of Affine and Formal Abelian Groups
Creators: name: Bauer, Tilman
name: Carlson, Magnus
Publisher: name: Deutsche Mathematiker-Vereinigung
Year: 2019

description: In this paper we study tensor products of affine abelian group schemes over a perfect field $k$. We first prove that the tensor product $G_1 \otimes G_2$ of two affine abelian group schemes $G_1,G_2$ over a perfect field $k$ exists. We then describe the multiplicative and unipotent part of the group scheme $G_1 \otimes G_2$. The multiplicative part is described in terms of Galois modules over the absolute Galois group of $k$. We describe the unipotent part of $G_1 \otimes G_2$ explicitly, using Dieudonn\'e theory in positive characteristic. We relate these constructions to previously studied tensor products of formal group schemes.
description: DOCUMENTA MATHEMATICA, Vol 24 (2019), p. 2525-2582, 1431-0643
Electron MHD: dynamics and turbulence
Creators: name: Lyutikov, Maxim
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: (Abridged) We consider dynamics and turbulent interaction of whistler modes within the framework of inertialess electron MHD (EMHD). We argue there is no energy principle in EMHD: any stationary closed configuration is neutrally stable. We consider the turbulent cascade of whistler modes. We show that (i) harmonic whistlers are exact non-linear solutions; (ii) co-linear whistlers do not interact (including counter-propagating); (iii) waves with the same value of the wave vector, $k_1=k_2$, do not interact; (iv) whistler modes have a dispersion that allows a three-wave decay, including into a zero frequency mode; (v) the three-wave interaction effectively couples modes with highly different wave numbers and propagation angles. In addition, linear interaction of a whistler with a single zero-mode can lead to spatially divergent structures via parametric instability. All these properties are drastically different from MHD, so that the qualitative properties of the Alfven turbulence cannot be transferred to the EMHD turbulence. We derive the Hamiltonian formulation of EMHD, and using Bogolyubov transformation reduce it to the canonical form; we calculate the matrix elements for the three-wave interaction of whistlers. We solve numerically the kinetic equation and show that, generally, the EMHD cascade develops within a broad range of angles, while transiently it may show anisotropic, nearly two dimensional structures. Development of a cascade depends on the forcing (non-universal) and often fails to reach a steady state. Analytical estimates predict the spectrum of magnetic fluctuations for the quasi-isotropic cascade $\propto k^{-2}$. The cascade remains weak (not critically-balanced). The cascade is UV-local, while the infrared locality is weakly (logarithmically) violated.
title: Pflanzenvielfalt in Botanischen Gärten. Eine wenig beachtete und gesicherte Schatztruhe
Creators: name: Koch, Marcus
name: Kahl, Wolfgang
Publisher: name: University Library Heidelberg
Year: 2016

description: Der Beitrag geht – am Beispiel von Heidelberg – der Frage nach, welche ökologische Bedeutung Botanischen Gärten mit Blick auf den Schutz der Biodiversität zukommt, die zu den wichtigsten Zielen des Naturschutzrechts gehört. Er zeichnet dabei das Bild weitgehend fehlender, spezifisch die Tätigkeit Botanischer Gärten regelnder Rechtsnormen und damit mangelnder Rechtssicherheit für die verantwortlichen Akteure in diesem Bereich. Dieses rechtliche Schutzdefizit wiegt umso schwerer, als in Zeiten knapper finanzieller und personeller Ressourcen die Abwägung mit konkurrierenden (ökonomischen) Belangen insbesondere auf politischer Ebene ohnehin nicht selten zuungunsten der Sicherung biologischer Vielfalt „ex situ“ erfolgt.
description: Forschungsansatz, -methode oder -verfahren: rechtswissenschaftliche Analyse; biologische Analyse
description: Forum Marsilius-Kolleg, Bd. 13 (2016), Beginn und Erscheinungsfrequenz: Jahr: 2012
Tydi-lang: A Language for Typed Streaming Hardware
Creators: name: Tian, Yongding
name: Reukers, Matthijs A.
name: Al-Ars, Zaid
name: Hofstee, Peter
name: Brobbel, Matthijs
name: Peltenburg, Johan
name: van Straten, Jeroen
Publisher: name: arXiv
Year: 2022
Subjects: subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences
subject: B.6.3; D.3.0

description: Transferring composite data structures with variable-length fields often requires designing unique protocols, causing incompatibility issues and decreased collaboration among hardware developers, especially in the open-source community. Because the high-level meaning of a protocol is often lost in translation to low-level languages when a custom protocol needs to be designed, extra documentation is required, the interpretation of which introduces new opportunities for errors. The Tydi specification (Tydi-spec) was proposed to address the issues by codifying the complex structures in a type and providing a standard protocol to transfer typed data among components. This paper presents Tydi-lang, a language that incorporates Tydi-spec for describing typed streams and offers templates for reusable components. An open-source compiler from Tydi-lang to Tydi intermediate representation (Tydi-IR) is implemented, and a Tydi-IR to VHDL compiler is utilized. Through Tydi-lang examples translating high-level SQL to VHDL, we demonstrate its efficiency in raising abstraction levels and reducing design effort.
description: 8 pages and 1 page of reference, 4 figures, 4 tables
Laser-assisted CP-odd and CP-even Higgs bosons production in THDM
Creators: name: Ouhammou, M.
name: Ouali, M.
name: Taj, S.
name: Benbrik, R.
name: Manaut, B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper, we have theoretically studied the neutral Higgs pair production in Two Higgs Doublet Model (THDM) in the presence of a circularly polarized laser field. The laser-assisted differential partial cross section is derived in the centre of mass frame at the leading order including $Z$ diagram. The total cross section is computed numerically by integrating the differential cross section over the solid angle $dΩ$. Two benchmark points are discussed for the THDM parameters. In the first step, we have analyzed the total cross section of ${e}^{+}{e}^{-}\rightarrow h^{0}A^{0}$ by considering $H^{0}$ as the standard model-like Higgs boson. Then, the process ${e}^{+}{e}^{-}\rightarrow H^{0}A^{0}$ is studied by taking $h^{0}$ as the Higgs boson of the standard model. For both benchmark points, the laser-assisted total cross section of the studied processes depends on the produced neutral Higgs masses, the centre of mass energy and the laser field parameters. In addition, the maximum cross section occurs at high centre of mass energy for the process ${e}^{+}{e}^{-}\rightarrow H^{0}A^{0}$ as compared to that of ${e}^{+}{e}^{-}\rightarrow h^{0}A^{0}$.
description: 18 pages, 10 figures
Blind extraction of an exoplanetary spectrum through Independent Component Analysis
Creators: name: Waldmann, Ingo P.
name: Tinetti, Giovanna
name: Deroo, Pieter
name: Hollis, Morgan D. J.
name: Yurchenko, Sergey N.
name: Tennyson, Jonathan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Blind-source separation techniques are used to extract the transmission spectrum of the hot-Jupiter HD189733b recorded by the Hubble/NICMOS instrument. Such a 'blind' analysis of the data is based on the concept of independent component analysis. The de-trending of Hubble/NICMOS data using the sole assumption that nongaussian systematic noise is statistically independent from the desired light-curve signals is presented. By not assuming any prior, nor auxiliary information but the data themselves, it is shown that spectroscopic errors only about 10 - 30% larger than parametric methods can be obtained for 11 spectral bins with bin sizes of ~0.09 microns. This represents a reasonable trade-off between a higher degree of objectivity for the non-parametric methods and smaller standard errors for the parametric de-trending. Results are discussed in the light of previous analyses published in the literature. The fact that three very different analysis techniques yield comparable spectra is a strong indication of the stability of these results.
description: ApJ accepted
Auto-labelling of Bug Report using Natural Language Processing
Creators: name: Patil, Avinash
name: Jadon, Aryan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Software Engineering (cs.SE)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The exercise of detecting similar bug reports in bug tracking systems is known as duplicate bug report detection. Having prior knowledge of a bug report's existence reduces efforts put into debugging problems and identifying the root cause. Rule and Query-based solutions recommend a long list of potential similar bug reports with no clear ranking. In addition, triage engineers are less motivated to spend time going through an extensive list. Consequently, this deters the use of duplicate bug report retrieval solutions. In this paper, we have proposed a solution using a combination of NLP techniques. Our approach considers unstructured and structured attributes of a bug report like summary, description and severity, impacted products, platforms, categories, etc. It uses a custom data transformer, a deep neural network, and a non-generalizing machine learning method to retrieve existing identical bug reports. We have performed numerous experiments with significant data sources containing thousands of bug reports and showcased that the proposed solution achieves a high retrieval accuracy of 70% for recall@5.
description: 7 Pages, 11 Figures