cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Understanding EROS2 observations toward the spiral arms within a classical Galactic model framework
Creators: name: Moniez, Marc
name: Sajadian, Sedighe
name: Karami, Mansour
name: Rahvar, Sohrab
name: Ansari, Reza
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: EROS has searched for microlensing toward four directions in the Galactic plane away from the Galactic center. The interpretation of the catalog optical depth is complicated by the spread of the source distance distribution. We compare the EROS microlensing observations with Galactic models, tuned to fit the EROS source catalogs, and take into account all observational data such as the microlensing optical depth, the Einstein crossing durations, and the color and magnitude distributions of the catalogued stars. We simulated EROS-like source catalogs using the Hipparcos database, the Galactic mass distribution, and an interstellar extinction table. Taking into account the EROS star detection efficiency, we were able to produce simulated color-magnitude diagrams that fit the observed diagrams. This allows us to estimate average microlensing optical depths and event durations that are directly comparable with the measured values. Both the Besancon model and our Galactic model allow us to fully understand the EROS color-magnitude data. The average optical depths and mean event durations calculated from these models are in reasonable agreement with the observations; consequently our simulation allows a better understanding of the lens and source spatial distributions in the microlensing events. Varying the Galactic structure parameters through simulation, we were also able to deduce contraints on the kinematics of the disk, the disk stellar mass function (IMF at a few kpc distance from the Sun), and the maximum contribution of a thick disk of compact objects in the Galactic plane (Mthick < 5 - 7 x 10**10 Msun at 95%, depending on the model). We also show that the microlensing data toward one of our monitored directions are significantly sensitive to the galactic bar parameters, although much larger statistics are needed to provide competitive constraints.
description: 16 pages, 17 figures, submitted to A&A
Cooling of neutron stars in soft X-ray transients
Creators: name: Han, Sophia
name: Steiner, Andrew W.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Thermal states of neutron stars in soft X-ray transients (SXRTs) are thought to be determined by "deep crustal heating" in the accreted matter that drives the quiescent luminosity and cooling via emission of photons and neutrinos from the interior. In this study, we assume a global thermal steady-state of the transient system and calculate the heating curves (quiescent surface luminosity as a function of mean accretion rate) predicted from theoretical models, taking into account variations in the equations of state, superfluidity gaps, thickness of the light element layer and a phenomenological description of the direct Urca threshold. We further provide a statistical analysis on the uncertainties in these parameters, and compare the overall results with observations of several SXRTs, in particular the two sources containing the coldest (SAX J1808.4-3658) and the hottest (Aql X-1) neutron stars. Interpretation of the observational data indicates that the direct Urca process is required for the most massive stars and also suggests small superfluid gaps.
description: 15 pages, 10 figures; typos corrected; extended discussions on the likelihood function and quality of the fit; interpretation of superfluid gaps and direct Urca threshold has been elaborated
Real-Time Detection and Control of Correlated Charge Tunneling in a Quantum Dot
Creators: name: Bayer, Johannes C.
name: Brange, Fredrik
name: Schmidt, Adrian
name: Wagner, Timo
name: Rugeramigabo, Eddy P.
name: Flindt, Christian
name: Haug, Rolf J.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We experimentally demonstrate the real-time detection and control of correlated charge tunneling in a dynamically driven quantum dot. Specifically, we measure the joint distribution of waiting times between tunneling charges and show that the waiting times for holes may be strongly correlated due to the periodic drive and the Coulomb interactions on the dot, although the electron waiting times are not. Our measurements are in excellent agreement with a theoretical model that allows us to develop a detailed understanding of the correlated tunneling events. We also demonstrate that the degree of correlations can be controlled by the drive. Our experiment paves the way for systematic real-time investigations of correlated electron transport in low-dimensional nanostructures.
description: 7 pages, 5 figures
Equivalence between the Lovelock-Cartan action and a constrained gauge theory
Creators: name: Junqueira, O. C.
name: Pereira, A. D.
name: Sadovski, G.
name: Santos, T. R. S.
name: Sobreiro, R. F.
name: Tomaz, A. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that the four-dimensional Lovelock-Cartan action can be derived from a massless gauge theory for the $SO(1,3)$ group with an additional BRST trivial part. The model is originally composed by a topological sector and a BRST exact piece and has no explicit dependence on the metric, the vierbein or a mass parameter. The vierbein is introduced together with a mass parameter through some BRST trivial constraints. The effect of the constraints is to identify the vierbein with some of the additional fields, transforming the original action into the Lovelock-Cartan one. In this scenario, the mass parameter is identified with Newton's constant while the gauge field is identified with the spin-connection. The symmetries of the model are also explored. Moreover, the extension of the model to a quantum version is qualitatively discussed.
description: 17 pages. No figures. Final version accepted for publication at the EPJC
Packing parameters in graphs: New bounds and a solution to an open problem
Creators: name: Mojdeh, D. A.
name: Samadi, Babak
Publisher: name: arXiv
Year: 2017
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C69

description: In this paper, we investigate the packing parameters in graphs. By applying the Mantel's theorem, We give upper bounds on packing and open packing numbers of triangle-free graphs along with characterizing the graphs for which the equalities hold and exhibit sharp Nordhaus-Gaddum type inequalities for packing numbers. We also solve the open problem of characterizing all connected graphs with $ρ_{o}(G)=n-ω(G)$ posed in [S. Hamid and S. Saravanakumar, {\em Packing parameters in graphs}, Discuss Math. Graph Theory, 35 (2015), 5--16].
Large magnetoresistance and Fermi surface study of Sb$_2$Se$_2$Te single crystal
Creators: name: Shrestha, K.
name: Marinova, V.
name: Graf, D.
name: Lorenz, B.
name: Chu, C. W.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have studied the magnetotransport properties of a Sb$_2$Se$_2$Te single crystal. Magnetoresistance (MR) is maximum when the magnetic field is perpendicular to the sample surface and reaches to a value of 1100\% at $B$=31 T with no sign of saturation. MR shows Shubnikov de Haas (SdH) oscillations above $B$=15 T. The frequency spectrum of SdH oscillations consists of three distinct peaks at $α$=32 T, $β$=80 T and $γ$=117 T indicating the presence of three Fermi surface pockets. Among these frequencies, $β$ is the prominent peak in the frequency spectrum of SdH oscillations measured at different tilt angles of the sample with respect to the magnetic field. From the angle dependence $β$ and Berry phase calculations, we have confirmed the trivial topology of the $β$-pocket. The cyclotron masses of charge carriers, obtained by using the Lifshitz-Kosevich formula, are found to be $m^{*}_β=0.16m_o$ and $m^{*}_γ=0.63m_o$ for the $β$ and $γ$ bands respectively. Large MR of Sb$_2$Se$_2$Te is suitable for utilization in electronic instruments such as a computer hard disc, high field magnetic sensors, and memory devices.
description: http://aip.scitation.org/doi/10.1063/1.4998575
The automorphisms of Petit's algebras
Creators: name: Brown, Christian
name: Pumpluen, Susanne
Publisher: name: arXiv
Year: 2017
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: Let $σ$ be an automorphism of a field $K$ with fixed field $F$. We study the automorphisms of nonassociative unital algebras which are canonical generalizations of the associative quotient algebras $K[t;σ]/fK[t;σ]$ obtained when the twisted polynomial $f\in K[t;σ]$ is invariant, and were first defined by Petit. We compute all their automorphisms if $σ$ commutes with all automorphisms in ${\rm Aut}_F(K)$ and $n\geq m-1$, where $n$ is the order of $σ$ and $m$ the degree of $f$,and obtain partial results for $n
description: Final version, to appear in Communications in Algebra
Frustrated Magnetism of Dipolar Molecules on a Square Optical Lattice: Prediction of a Quantum Paramagnetic Ground State
Creators: name: Zou, Haiyuan
name: Zhao, Erhai
name: Liu, W. Vincent
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Motivated by the experimental realization of quantum spin models of polar molecule KRb in optical lattices, we analyze the spin 1/2 dipolar Heisenberg model with competing anisotropic, long-range exchange interactions. We show that, by tilting the orientation of dipoles using an external electric field, the dipolar spin system on square lattice comes close to a maximally frustrated region similar, but not identical, to that of the $J_1$-$J_2$ model. This provides a simple yet powerful route to potentially realize a quantum spin liquid without the need for a triangular or kagome lattice. The ground state phase diagrams obtained from Schwinger-boson and spin-wave theories consistently show a spin disordered region between the N$\acute{\textrm{e}}$el, stripe, and spiral phase. The existence of a finite quantum paramagnetic region is further confirmed by an unbiased variational ansatz based on tensor network states and a tensor renormalization group.
description: 5+10 pages, 3+8 figures
Benchmarking and Improving Bird's Eye View Perception Robustness in Autonomous Driving
Creators: name: Xie, Shaoyuan
name: Kong, Lingdong
name: Zhang, Wenwei
name: Ren, Jiawei
name: Pan, Liang
name: Chen, Kai
name: Liu, Ziwei
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Recent advancements in bird's eye view (BEV) representations have shown remarkable promise for in-vehicle 3D perception. However, while these methods have achieved impressive results on standard benchmarks, their robustness in varied conditions remains insufficiently assessed. In this study, we present RoboBEV, an extensive benchmark suite designed to evaluate the resilience of BEV algorithms. This suite incorporates a diverse set of camera corruption types, each examined over three severity levels. Our benchmarks also consider the impact of complete sensor failures that occur when using multi-modal models. Through RoboBEV, we assess 33 state-of-the-art BEV-based perception models spanning tasks like detection, map segmentation, depth estimation, and occupancy prediction. Our analyses reveal a noticeable correlation between the model's performance on in-distribution datasets and its resilience to out-of-distribution challenges. Our experimental results also underline the efficacy of strategies like pre-training and depth-free BEV transformations in enhancing robustness against out-of-distribution data. Furthermore, we observe that leveraging extensive temporal information significantly improves the model's robustness. Based on our observations, we design an effective robustness enhancement strategy based on the CLIP model. The insights from this study pave the way for the development of future BEV models that seamlessly combine accuracy with real-world robustness.
description: TPAMI 2025; 17 pages, 13 figures, 11 tables; Code at this https URL: https://github.com/Daniel-xsy/RoboBEV
Optimal control of Rydberg lattice gases
Creators: name: Cui, Jian
name: van Bijnen, Rick
name: Pohl, Thomas
name: Montangero, Simone
name: Calarco, Tommaso
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We present optimal control protocols to prepare different many-body quantum states of Rydberg atoms in optical lattices. Specifically, we show how to prepare highly ordered many-body ground states, GHZ states as well as some superposition of symmetric excitation number Fock states, that inherit the translational symmetry from the Hamiltonian, within sufficiently short excitation times minimizing detrimental decoherence effects. For the GHZ states, we propose a two-step detection protocol to experimentally verify the optimal preparation of the target state based only on standard measurement techniques. Realistic experimental constraints and imperfections are taken into account by our optimization procedure making it applicable to ongoing experiments.
description: Accepted version
Ranking with Ties based on Noisy Performance Data
Creators: name: Sankaran, Aravind
name: Karlsson, Lars
name: Bientinesi, Paolo
Publisher: name: arXiv
Year: 2024
Subjects: subject: Performance (cs.PF)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: We consider the problem of ranking a set of objects based on their performance when the measurement of said performance is subject to noise. In this scenario, the performance is measured repeatedly, resulting in a range of measurements for each object. If the ranges of two objects do not overlap, then we consider one object as 'better' than the other, and we expect it to receive a higher rank; if, however, the ranges overlap, then the objects are incomparable, and we wish them to be assigned the same rank. Unfortunately, the incomparability relation of ranges is in general not transitive; as a consequence, in general the two requirements cannot be satisfied simultaneously, i.e., it is not possible to guarantee both distinct ranks for objects with separated ranges, and same rank for objects with overlapping ranges. This conflict leads to more than one reasonable way to rank a set of objects. In this paper, we explore the ambiguities that arise when ranking with ties, and define a set of reasonable rankings, which we call partial rankings. We develop and analyse three different methodologies to compute a partial ranking. Finally, we show how performance differences among objects can be investigated with the help of partial ranking.
description: 22 pages, 21 figures
Meth4Mob - Planning, Design, Implementation and Alpha Testing
Creators: name: Galeano, Iris
name: Merin, Mauricio
name: González, Magalí
name: Cernuzzi, Luca
Publisher: name: figshare
Year: 2023
Subjects: Software quality, processes and metrics

description: Verification of the usability of the suggested techniques in the following phases: * Planning Phase * Design Phase * Implementation and Alpha Testing Phase
Perturbative corrections to $B \to D$ form factors in QCD
Creators: name: Wang, Yu-Ming
name: Wei, Yan-Bing
name: Shen, Yue-Long
name: Lü, Cai-Dian
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We compute perturbative QCD corrections to $B \to D$ form factors at leading power in $Λ/m_b$, at large hadronic recoil, from the light-cone sum rules (LCSR) with $B$-meson distribution amplitudes in HQET. QCD factorization for the vacuum-to-$B$-meson correlation function with an interpolating current for the $D$-meson is demonstrated explicitly at one loop with the power counting scheme $m_c \sim {\cal O} \left (\sqrt{Λ\, m_b} \right ) $. The jet functions encoding information of the hard-collinear dynamics in the above-mentioned correlation function are complicated by the appearance of an additional hard-collinear scale $m_c$, compared to the counterparts entering the factorization formula of the vacuum-to-$B$-meson correction function for the construction of $B \to π$ from factors. Inspecting the next-to-leading-logarithmic sum rules for the form factors of $B \to D \ell ν$ indicates that perturbative corrections to the hard-collinear functions are more profound than that for the hard functions, with the default theory inputs, in the physical kinematic region. We further compute the subleading power correction induced by the three-particle quark-gluon distribution amplitudes of the $B$-meson at tree level employing the background gluon field approach. The LCSR predictions for the semileptonic $B \to D \ell ν$ form factors are then extrapolated to the entire kinematic region with the $z$-series parametrization. Phenomenological implications of our determinations for the form factors $f_{BD}^{+, 0}(q^2)$ are explored by investigating the (differential) branching fractions and the $R(D)$ ratio of $B \to D \ell ν$ and by determining the CKM matrix element $|V_{cb}|$ from the total decay rate of $B \to D μν_μ$.
description: 49 pages, 8 figures, version accepted for publication in JHEP
Meth4Mob - Planning, Design, Implementation and Alpha Testing
Creators: name: Galeano, Iris
name: González, Magalí
name: Cernuzzi, Luca
Publisher: name: figshare
Year: 2023
Subjects: Software quality, processes and metrics

description: Verification of the usability of the suggested techniques in the following phases: * Planning Phase * Design Phase * Implementation and Alpha Testing Phase
Time-dependent spectral renormalization method
Creators: name: Cole, Justin T.
name: Musslimani, Ziad H.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: The spectral renormalization method was introduced by Ablowitz and Musslimani in 2005, [Opt. Lett. 30, pp. 2140-2142] as an effective way to numerically compute (time-independent) bound states for certain nonlinear boundary value problems. % of the nonlinear Schrödinger (NLS), Gross-Pitaevskii and water wave type equations to mention a few. In this paper, we extend those ideas to the time domain and introduce a time-dependent spectral renormalization method as a numerical means to simulate linear and nonlinear evolution equations. The essence of the method is to convert the underlying evolution equation from its partial or ordinary differential form (using Duhamel's principle) into an integral equation. The solution sought is then viewed as a fixed point in both space and time. The resulting integral equation is then numerically solved using a simple renormalized fixed-point iteration method. Convergence is achieved by introducing a time-dependent renormalization factor which is numerically computed from the physical properties of the governing evolution equation. The proposed method has the ability to incorporate physics into the simulations in the form of conservation laws or dissipation rates. This novel scheme is implemented on benchmark evolution equations: the classical nonlinear Schrödinger (NLS), integrable $PT$ symmetric nonlocal NLS and the viscous Burgers' equations, each of which being a prototypical example of a conservative and dissipative dynamical system. Numerical implementation and algorithm performance are also discussed.
description: Corrected version to be published in Physica D
Ideal Magnetohydrodynamics with Radiative Terms: Energy Conditions
Creators: name: Pimentel, Oscar M.
name: Lora-Clavijo, F. D.
name: González, Guillermo A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Nowadays, the magnetic and radiation fields are very important to understand the matter accretion into compact objects, the dynamics of binary systems, the equilibrium configurations of neutron stars, the photon diffusion, etc. The energy and the momentum associated to these fields, along with the matter one, need to satisfy some conditions that guarantee an appropriate physical behavior of the source and its gravitational field. Based on this fact, we present the energy conditions for a perfect fluid with magnetic and radiation field, in which the radiation part of the energy-momentum tensor is assumed to be approximately isotropic, in accordance with the optically thick regime. In order to find these conditions, the stress tensor of the system is written in an orthonormal basis in which it becomes diagonal, and the energy conditions are computed through contractions of the energy-momentum tensor with the four velocity vector of an arbitrary observer. Finally, the conditions for a magnetized fluid are presented as a particular case in which the radiation contribution is zero.
description: 12 pages
MPEC 2023-N10 : DAILY ORBIT UPDATE (2023 July 3)
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Parametric geometry of numbers in function fields
Creators: name: Roy, Damien
name: Waldschmidt, Michel
Publisher: name: arXiv
Year: 2017
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11J13 (Primary), 41A20, 41A21, 13J05, 11H06 (Secondary)

description: Parametric geometry of numbers is a new theory, recently created by Schmidt and Summerer, which unifies and simplifies many aspects of classical Diophantine approximations, providing a handle on problems which previously seemed out of reach. Our goal is to transpose this theory to fields of rational functions in one variable and to analyze in that context the problem of simultaneous approximation to exponential functions.
description: 20 pages, the proof of a central lemma is simplified and the main construction is shown to be universal. This paper will appear in Mathematika
Search for Evergreens in Science: A Functional Data Analysis
Creators: name: Zhang, Ruizhi
name: Wang, Jian
name: Mei, Yajun
Publisher: name: arXiv
Year: 2017
Subjects: subject: Applications (stat.AP)
subject: Digital Libraries (cs.DL)
subject: FOS: Computer and information sciences

description: Evergreens in science are papers that display a continual rise in annual citations without decline, at least within a sufficiently long time period. Aiming to better understand evergreens in particular and patterns of citation trajectory in general, this paper develops a functional data analysis method to cluster citation trajectories of a sample of 1699 research papers published in 1980 in the American Physical Society (APS) journals. We propose a functional Poisson regression model for individual papers' citation trajectories, and fit the model to the observed 30-year citations of individual papers by functional principal component analysis and maximum likelihood estimation. Based on the estimated paper-specific coefficients, we apply the K-means clustering algorithm to cluster papers into different groups, for uncovering general types of citation trajectories. The result demonstrates the existence of an evergreen cluster of papers that do not exhibit any decline in annual citations over 30 years.
description: 40 pages, 9 figures
VBIM-Net: Variational Born Iterative Network for Inverse Scattering Problems
Creators: name: Xing, Ziqing
name: Zhang, Zhaoyang
name: Chen, Zirui
name: Wang, Yusong
name: Ma, Haoran
name: Wei, Zhun
Publisher: name: arXiv
Year: 2024
Subjects: subject: Signal Processing (eess.SP)
subject: Artificial Intelligence (cs.AI)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Recently, studies have shown the potential of integrating field-type iterative methods with deep learning (DL) techniques in solving inverse scattering problems (ISPs). In this article, we propose a novel Variational Born Iterative Network, namely, VBIM-Net, to solve the full-wave ISPs with significantly improved structural rationality and inversion quality. The proposed VBIM-Net emulates the alternating updates of the total electric field and the contrast in the variational Born iterative method (VBIM) by multiple layers of subnetworks. We embed the analytical calculation of the contrast variation into each subnetwork, converting the scattered field residual into an approximate contrast variation and then enhancing it by a U-Net, thus avoiding the requirement of matched measurement dimension and grid resolution as in existing approaches. The total field and contrast of each layer's output is supervised in the loss function of VBIM-Net, imposing soft physical constraints on the variables in the subnetworks, which benefits the model's performance. In addition, we design a training scheme with extra noise to enhance the model's stability. Extensive numerical results on synthetic and experimental data both verify the inversion quality, generalization ability, and robustness of the proposed VBIM-Net. This work may provide some new inspiration for the design of efficient field-type DL schemes.
description: This article has been published in IEEE Transactions on Geoscience and Remote Sensing
Dark Matter Search Results from the PICO-60 C$_3$F$_8$ Bubble Chamber
Creators: name: Amole, C.
name: Ardid, M.
name: Arnquist, I. J.
name: Asner, D. M.
name: Baxter, D.
name: Behnke, E.
name: Bhattacharjee, P.
name: Borsodi, H.
name: Bou-Cabo, M.
name: Campion, P.
name: Cao, G.
name: Chen, C. J.
name: Chowdhury, U.
name: Clark, K.
name: Collar, J. I.
name: Cooper, P. S.
name: Crisler, M.
name: Crowder, G.
name: Dahl, C. E.
name: Das, M.
name: Fallows, S.
name: Farine, J.
name: Felis, I.
name: Filgas, R.
name: Girard, F.
name: Giroux, G.
name: Hall, J.
name: Harris, O.
name: Hoppe, E. W.
name: Jin, M.
name: Krauss, C. B.
name: Laurin, M.
name: Lawson, I.
name: Leblanc, A.
name: Levine, I.
name: Lippincott, W. H.
name: Mamedov, F.
name: Maurya, D.
name: Mitra, P.
name: Nania, T.
name: Neilson, R.
name: Noble, A. J.
name: Olson, S.
name: Ortega, A.
name: Plante, A.
name: Podviyanuk, R.
name: Priya, S.
name: Robinson, A. E.
name: Roeder, A.
name: Rucinski, R.
name: Scallon, O.
name: Seth, S.
name: Sonnenschein, A.
name: Starinski, N.
name: Štekl, I.
name: Tardif, F.
name: Vázquez-Jáuregui, E.
name: Wells, J.
name: Wichoski, U.
name: Yan, Y.
name: Zacek, V.
name: Zhang, J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: New results are reported from the operation of the PICO-60 dark matter detector, a bubble chamber filled with 52 kg of C$_3$F$_8$ located in the SNOLAB underground laboratory. As in previous PICO bubble chambers, PICO-60 C$_3$F$_8$ exhibits excellent electron recoil and alpha decay rejection, and the observed multiple-scattering neutron rate indicates a single-scatter neutron background of less than 1 event per month. A blind analysis of an efficiency-corrected 1167-kg-day exposure at a 3.3-keV thermodynamic threshold reveals no single-scattering nuclear recoil candidates, consistent with the predicted background. These results set the most stringent direct-detection constraint to date on the WIMP-proton spin-dependent cross section at 3.4 $\times$ 10$^{-41}$ cm$^2$ for a 30-GeV$\thinspace$c$^{-2}$ WIMP, more than one order of magnitude improvement from previous PICO results.
description: 6 pages, 6 figures
Open Journal Systems System Installation Considerations
Creators: name: SOONG
Publisher: name: Zenodo
Year: 2023
Subjects: OJS

description: Open Journal Systems is mainly used for publishing open source journals, including functions such as submission, review, and publishing. There are multiple parts of the installation process that require special operations, and this article is only for record purposes. It includes version selection, environment configuration, post installation adjustment, error handling, etc.
Confining gauge theories and holographic entanglement entropy with a magnetic field
Creators: name: Dudal, David
name: Mahapatra, Subhash
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the soft wall model for a heuristic holographical modelling of a confining gauge theory and discuss how the introduction of a (constant) magnetic field influences the (de)confinement phase structure. We use the entanglement entropy as a diagnostic tool in terms of the length of an entangling strip geometry. Due to the anisotropy introduced by the magnetic field, we find that the results depend on the orientation of the strip relative to the field. This allows to identify a richer, anisotropic, interplay between confinement and a magnetic field than possibly can be extracted from a more standard order parameter as, for example, the Polyakov loop expectation value.
description: 25 pages, 31 figures
Coupled modes locally interacting with qubits: critical assessment of the rotating wave approximation
Creators: name: Cárdenas, P. C.
name: Teixeira, W. S.
name: Semião, F. L.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The interaction of qubits with quantized modes of electromagnetic fields has been largely addressed in the quantum optics literature under the rotating wave approximation (RWA), where rapid oscillating terms in the qubit-mode interaction picture Hamiltonian can be neglected. At the same time, it is generally accepted that provided the interaction is sufficiently strong or for long times, the RWA tends to describe physical phenomena incorrectly. In this work, we extend the investigation of the validity of the RWA to a more involved setup where two qubit-mode subsystems are brought to interaction through their harmonic coordinates. Our treatment is all analytic thanks to a sequence of carefully chosen unitary transformations which allows us to diagonlize the Hamiltonian within and without the RWA. By also considering qubit dephasing, we find that the purity of the two-qubit state presents non-Markovian features which become more pronounced as the coupling between the modes gets stronger and the RWA loses its validity. In the same regime, there occurs fast generation of entanglement between the qubits which is also not correctly described under the RWA. The setup and results presented here clearly show the limitations of the RWA in a scenario amenable to exact description and free from numerical uncertainties. Consequently, it may be of interest for the community working with cavity or circuit quantum electrodynamic systems in the strong coupling regime.
description: 8 pages, 5 figures
Resolving Dispersion and Induction Components for Polarisable Molecular Simulations of Ionic Liquids
Creators: name: Pádua, Agílio A. H.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: One important development in interaction potential models, or atomistic force fields, for molecular simulation is the inclusion of explicit polarisation, which represents the induction effects of charged or polar molecules on polarisable electron clouds. Polarisation can be included through fluctuating charges, induced multipoles or Drude dipoles. This work uses Drude dipoles and is focused on room-temperature ionic liquids, for which fixed-charge models predict too slow dynamics. The aim of this study is to devise a strategy to adapt existing non-polarisable force fields upon addition of polarisation, because induction was already contained to an extent, implicitly, due to parametrisation against empirical data. Therefore, a fraction of the van der Waals interaction energy should be subtracted so that the Lennard-Jones terms only account for dispersion and the Drude dipoles for induction. Symmetry-adapted perturbation theory (SAPT) is used to resolve the dispersion and induction terms in dimers and to calculate scaling factors to reduce the Lennard-Jones terms from the non-polarisable model. Simply adding Drude dipoles to an existing fixed-charge model already improves the prediction of transport properties, increasing diffusion coefficients and lowering the viscosity. Scaling down the Lennard-Jones terms leads to still faster dynamics and to densities that match experiment extremely well. The concept developed here improves the prediction of density and transport properties and can be adapted to other models and systems. The inclusion of polarisation and the down-scaling of Lennard-Jones terms affects onyl slightly the ordering of the first shell of counterions, leading to small decreases in coordination numbers. The effect of polarisation is major beyond first neighbours, weakening spatial correlations, a structural effect related to the faster dynamics of polarisable models.
Roche-lobe overflow in eccentric planet-star systems
Creators: name: Dosopoulou, Fani
name: Naoz, Smadar
name: Kalogera, Vassiliki
Publisher: name: arXiv
Year: 2017
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Many giant exoplanets are found near their Roche limit and in mildly eccentric orbits. In this study we examine the fate of such planets through Roche-lobe overflow as a function of the physical properties of the binary components, including the eccentricity and the asynchronicity of the rotating planet. We use a direct three-body integrator to compute the trajectories of the lost mass in the ballistic limit and investigate the possible outcomes. We find three different outcomes for the mass transferred through the Lagrangian point $L_{1}$: (i) self-accretion by the planet, (ii) direct impact on the stellar surface, (iii) disk formation around the star. We explore the parameter space of the three different regimes and find that at low eccentricities, $e\lesssim 0.2$, mass overflow leads to disk formation for most systems, while for higher eccentricities or retrograde orbits self-accretion is the only possible outcome. We conclude that the assumption often made in previous work that when a planet overflows its Roche lobe it is quickly disrupted and accreted by the star is not always valid.
description: 6 pages, 4 Figures, Accepted for publication to ApJ
Quantum Algorithms for tensor-SVD
Creators: name: Jojo, Jezer
name: Khandelwal, Ankit
name: Chandra, M Girish
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A promising area of applications for quantum computing is in linear algebra problems. In this work, we introduce two new quantum t-SVD (tensor-SVD) algorithms. The first algorithm is largely based on previous work that proposed a quantum t-SVD algorithm for context-aware recommendation systems. The new algorithm however seeks to address and fix certain drawbacks to the original, and is fundamentally different in its approach compared to the existing work. The second algorithm proposed uses a hybrid variational approach largely based on a known variational quantum SVD algorithm.
description: 9 pages, 8 figures
IN-SYNC. V. Stellar kinematics and dynamics in the Orion A Molecular Cloud
Creators: name: Da Rio, Nicola
name: Tan, Jonathan C.
name: Covey, Kevin R.
name: Cottaar, Michiel
name: Foster, Jonathan B.
name: Cullen, Nicholas C.
name: Tobin, John J.
name: Kim, Jinyoung S.
name: Meyer, Michael R.
name: Nidever, David L.
name: Stassun, Keivan G.
name: Chojnowski, S. Drew
name: Flaherty, Kevin M.
name: Majewski, Steve
name: Skrutskie, Michael F.
name: Zasowski, Gail
name: Pan, Kaike
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The kinematics and dynamics of young stellar populations enable us to test theories of star formation. With this aim, we continue our analysis of the SDSS-III/APOGEE IN-SYNC survey, a high resolution near infrared spectroscopic survey of young clusters. We focus on the Orion A star-forming region, for which IN-SYNC obtained spectra of $\sim2700$ stars. In Paper IV we used these data to study the young stellar population. Here we study the kinematic properties through radial velocities ($v_r$). The young stellar population remains kinematically associated with the molecular gas, following a $\sim10\:{\rm{km\:s}}^{-1}$ gradient along filament. However, near the center of the region, the $v_r$ distribution is slightly blueshifted and asymmetric; we suggest that this population, which is older, is slightly in foreground. We find evidence for kinematic subclustering, detecting statistically significant groupings of co-located stars with coherent motions. These are mostly in the lower-density regions of the cloud, while the ONC radial velocities are smoothly distributed, consistent with it being an older, more dynamically evolved cluster. The velocity dispersion $σ_v$ varies along the filament. The ONC appears virialized, or just slightly supervirial, consistent with an old dynamical age. Here there is also some evidence for on-going expansion, from a $v_r$--extinction correlation. In the southern filament, $σ_v$ is $\sim2$--$3$ times larger than virial in the L1641N region, where we infer a superposition along the line of sight of stellar sub-populations, detached from the gas. On the contrary, $σ_v$ decreases towards L1641S, where the population is again in agreement with a virial state.
description: 14 pages, 13 figures, ApJ accepted
Enhancing Battlefield Awareness: An Aerial RIS-assisted ISAC System with Deep Reinforcement Learning
Creators: name: Cho, Hyunsang
name: Yoo, Seonghoon
name: Jung, Bang Chul
name: Kang, Joonhyuk
Publisher: name: arXiv
Year: 2024
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper considers a joint communication and sensing technique for enhancing situational awareness in practical battlefield scenarios. In particular, we propose an aerial reconfigurable intelligent surface (ARIS)-assisted integrated sensing and communication (ISAC) system consisting of a single access point (AP), an ARIS, multiple users, and a sensing target. With deep reinforcement learning (DRL), we jointly optimize the transmit beamforming of the AP, the RIS phase shifts, and the trajectory of the ARIS under signal-to-interference-noise ratio (SINR) constraints. Numerical results demonstrate that the proposed technique outperforms the conventional benchmark schemes by suppressing the self-interference and clutter echo signals or optimizing the RIS phase shifts.
Securitización del sector energético en el conflicto Rusia-Ucrania: un análisis de ciberseguridad en infraestructuras críticas
Creators: name: Rodríguez Islas
name: Aguilar-Antonio, J.M.
Publisher: name: Zenodo
Year: 2023
Subjects: Hybrid conflict
Securitization
Energy Security,
Russia
Ukraine

description: Resumen: Este trabajo refleja un análisis de los impactos en la industria energética tras el estallido del conflicto en Ucrania. En primer lugar, se enfoca en la hibridación del enfrentamiento, que deja de lado los referentes tradicionales enfocados únicamente a los factores político-militares de la guerra. Conjuntamente, se consideran los procesos de securitización en la esfera de los hidrocarburos como un tema prioritario en la agenda nacional y mundial. Palabras clave: Conflicto híbrido, securitización, seguridad energética, Rusia, Ucrania.
 Abstract: This paper presents an analysis of the impacts on the energy industry following the outbreak of the conflict in Ukraine. Firstly, it focuses on the hybridization of the confrontation, moving beyond traditional references solely centered on political-military factors of the war. Concurrently, it considers the processes of securitization in the sphere of hydrocarbons as a priority issue on both national and global agendas. Keywords: Hybrid conflict, securitization, energy security, Russia, Ukraine.
Zero mass limit of Kerr spacetime is a wormhole
Creators: name: Gibbons, Gary W.
name: Volkov, Mikhail S.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that, contrary to what is usually claimed in the literature, the zero mass limit of Kerr spacetime is not flat Minkowski space but a spacetime whose geometry is only locally flat. This limiting spacetime, as the Kerr spacetime itself, contains two asymptotic regions and hence cannot be topologically trivial. It also contains a curvature singularity, because the power-law singularity of the Weyl tensor vanishes in the limit but there remains a distributional contribution of the Ricci tensor. This spacetime can be interpreted as a wormhole sourced by a negative tension ring. We also extend the discussion to similarly interpret the zero mass limit of the Kerr-(anti)-de Sitter spacetime.
description: 14 pages, 4 figures, references added
La regulación de las Big Tech: el papel del Estado para contener a los gigantes de la tecnología en el siglo XXI
Creators: name: Aguilar-Antonio, J.M.
Publisher: name: Zenodo
Year: 2023
Subjects: Big Tech
Regulations
Legislations
State Nation
Government

description: Resumen: Las big tech como Facebook, Twitter y Uber han sido disruptoras, como tecnologías de la innovación, en brindar alternativas de entrenamiento, consumo o servicios a los usuarios alrededor del mundo. Sin embargo, muchas de ellas se han aprovechado de la ausencia de controles y leyes del Estado-nación para resguardar la autoridad del gobierno, lo que en múltiples episodios ha tenido costos sociales para los usuarios, consumidores y ciudadanos. Este artículo reflexiona sobre cómo el papel del Estado por regular a estos actores surge como una consecuencia innata, que delineará las relaciones entre las big tech y el gobierno durante el siglo XXI.
 Palabras clave: big tech, regulaciones, legislaciones, Estado-nación, gobierno. Abstract: Big tech companies such as Facebook, Twitter, and Uber have emerged as disruptive forces, driving technological innovations that offer alternative forms of training, consumption, and services to users across the globe. Nevertheless, many of these companies have exploited the absence of state controls and regulations to secure their influence, resulting in numerous instances where social costs were incurred by users, consumers, and citizens. This article contemplates the pivotal role of the state in regulating these entities, recognizing it as an inherent consequence that will shape the complex interplay between big tech and government in the 21st century.

 Keywords: big tech, regulations, legislations, State-nation, government.
Gaussian-Mixture-Model-based Cluster Analysis Finds Five Kinds of Gamma Ray Bursts in the BATSE Catalog
Creators: name: Chattopadhyay, Souradeep
name: Maitra, Ranjan
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Clustering methods are an important tool to enumerate and describe the different coherent kinds of Gamma Ray Bursts (GRBs). But their performance can be affected by a number of factors such as the choice of clustering algorithm and inherent associated assumptions, the inclusion of variables in clustering, nature of initialization methods used or the iterative algorithm or the criterion used to judge the optimal number of groups supported by the data. We analyzed GRBs from the BATSE 4Br catalog using $k$-means and Gaussian Mixture Models-based clustering methods and found that after accounting for all the above factors, all six variables -- different subsets of which have been used in the literature -- and that are, namely, the flux duration variables ($T_{50}$, $T_{90}$), the peak flux ($P_{256}$) measured in 256-millisecond bins, the total fluence ($F_t$) and the spectral hardness ratios ($H_{32}$ and $H_{321}$) contain information on clustering. Further, our analysis found evidence of five different kinds of GRBs and that these groups have different kinds of dispersions in terms of shape, size and orientation. In terms of duration, fluence and spectrum, the five types of GRBs were characterized as intermediate/faint/intermediate, long/intermediate/soft, intermediate/intermediate/intermediate, short/faint/hard and long/bright/intermediate.
description: 17 pages, 12 figures, 6 tables
Meth4Mob - Negotiation
Creators: name: Galeano, Iris
name: Merin, Mauricio
name: González, Magalí
name: Cernuzzi, Luca
Publisher: name: figshare
Year: 2023
Subjects: Software quality, processes and metrics

description: Verification of the usability of the techniques suggested in the Negotiation phase of the proposed methodology.
Shivelight
Creators: name: Eotvos, Melody
Publisher: name: The University of Melbourne
Year: 2024
Subjects: classificationCode: 360302
subject: Music composition and improvisation

description: "Shivelight" is a new work for Horn Trio (Violin, Horn in F, Piano) inspired by Gerard Manley Hopkins invented word, in 1888, to describe those lances of light that pierce a tree’s canopy or foliage.