cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Flexible mapping of ringdown amplitudes for nonprecessing binary black holes
Creators: name: Pacilio, Costantino
name: Bhagwat, Swetha
name: Nobili, Francesco
name: Gerosa, Davide
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The remnant black hole from a binary coalescence emits ringdown gravitational waves characterized by quasinormal modes, which depend solely on the remnant's mass and spin. In contrast, the ringdown amplitudes and phases are determined by the properties of the merging progenitors. Accurately modeling these amplitudes and phases reduces systematic biases in parameter estimation and enables the development and performance of rigorous tests of general relativity. We present a state-of-the-art, data-driven surrogate model for ringdown amplitudes and phases, leveraging Gaussian process regression trained against SXS numerical-relativity simulations. Focusing on nonprecessing, quasicircular binary black holes, our model offers the most comprehensive fit that includes 16 emission modes, incorporating overtones and quadratic contributions. Our surrogate model achieves reconstruction errors that are approximately 2 orders of magnitude smaller than the typical measurement errors of current gravitational-wave interferometers. An additional benefit of our approach is its flexibility, which allows for future extensions to include features such as eccentricity and precession, broadening the scope of its applicability to more generic astrophysical scenarios. Finally, we are releasing our model in a ready-to-use package called postmerger.
description: 12 pages, 7 figures; code usage examples are available at https://github.com/cpacilio/postmerger . v2: matches published version
A Passivity-Based Variable Impedance Controller for Incremental Learning of Periodic Interactive Tasks
Creators: name: Vedove, Matteo Dalle
name: Lamon, Edoardo
name: Fontanelli, Daniele
name: Palopoli, Luigi
name: Saveriano, Matteo
Publisher: name: arXiv
Year: 2024
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: In intelligent manufacturing, robots are asked to dynamically adapt their behaviours without reducing productivity. Human teaching, where an operator physically interacts with the robot to demonstrate a new task, is a promising strategy to quickly and intuitively reconfigure the production line. However, physical guidance during task execution poses challenges in terms of both operator safety and system usability. In this paper, we solve this issue by designing a variable impedance control strategy that regulates the interaction with the environment and the physical demonstrations, explicitly preventing at the same time passivity violations. We derive constraints to limit not only the exchanged energy with the environment but also the exchanged power, resulting in smoother interactions. By monitoring the energy flow between the robot and the environment, we are able to distinguish between disturbances (to be rejected) and physical guidance (to be accomplished), enabling smooth and controlled transitions from teaching to execution and vice versa. The effectiveness of the proposed approach is validated in wiping tasks with a real robotic manipulator.
description: Accepted at the 2024 IEEE 20th International Conference on Automation Science and Engineering (CASE)
Safety-Critical Stabilization of Force-Controlled Nonholonomic Mobile Robots
Creators: name: Han, Tianyu
name: Wang, Bo
Publisher: name: arXiv
Year: 2024
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We present a safety-critical controller for the problem of stabilization for force-controlled nonholonomic mobile robots. The proposed control law is based on the constructions of control Lyapunov functions (CLFs) and control barrier functions (CBFs) for cascaded systems. To address nonholonomicity, we design the nominal controller that guarantees global asymptotic stability and local exponential stability for the closed-loop system in polar coordinates and construct a strict Lyapunov function valid on any compact sets. Furthermore, we present a procedure for constructing CBFs for cascaded systems, utilizing the CBF of the kinematic model through integrator backstepping. Quadratic programming is employed to combine CLFs and CBFs to integrate both stability and safety in the closed loop. The proposed control law is time-invariant, continuous along trajectories, and easy to implement. Our main results guarantee both safety and local asymptotic stability for the closed-loop system.
description: The paper has been accepted to IEEE Control Systems Letters (L-CSS)
Two-Time Measurement of Entropy Transfer in Markovian Quantum Dynamics
Creators: name: Joye, A.
name: Pillet, C. -A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 81P15, 81P17

description: We consider a protocol for the two-time measurement of entropic observables in quantum open systems driven out of thermal equilibrium by coupling to several heat baths. We concentrate on the Markovian approximation of the time-evolution and relate the expected value of the so defined entropy variations with the well-known expression of entropy production due to Lebowitz and Spohn. We do so under the detailed balance condition and, as a byproduct, we show that the probabilities of outcomes of two-time measurements are given by a continuous time Markov process determined by the Lindblad generator of the Markovian quantum dynamics.
description: Published version
Flavor Nernst effects in quantum paramagnets
Creators: name: Lu, Bowen
name: Ma, Bowen
name: Yu, Yue
name: Chen, Gang
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Recent advances in spin transport research have highlighted the potential of quantum paramagnets as platforms for exploring novel phenomena and developing next-generation technologies. In this paper, we investigate the flavor Nernst effect (FNE) in quantum paramagnets, focusing on the Hall-type thermal spin transport of crystal electric field (CEF) excitations with spin-orbit couplings. As a proof of principle, we investigate the quantum paramagnetic ground state in an effective spin-1 Hamiltonian with Dzyaloshinskii-Moriya interactions and a large hard-axis anisotropy. We employ linear flavor-wave theory to analyze the low-energy excitations, and obtain the flavor Nernst coefficients from the linear response theory. We demonstrate the FNE in a 2D pyrochlore thin film with an all-in-all-out Ising axis configuration, and investigate their dependence on temperature, anisotropy, DM interaction, and external fields. Our results reveal the connection between the FNE and the Berry curvature of the CEF excitations, suggesting potential applications in manipulating thermal spin currents and exploring topological spin transport phenomena in quantum paramagnets.
description: 12 pages, 10 figures
Variational approach to atom-membrane dynamics
Creators: name: Clougherty, Dennis P.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Using the Dirac-Frenkel variational principle, a time-dependent description of the dynamics of a two-level system coupled to a bosonic bath is formulated. The method is applied to the case of a gas of cold atoms adsorbing to an elastic membrane at finite temperature via phonon creation. The time-dependence of the system state is analytically calculated using Laplace transform methods, and a closed-form expression for the transition rate is obtained. Atoms in the gas transition to the adsorbed state through a resonance that has contributions from a distribution of vibrational modes of the membrane. The resonance can decay with the creation of a phonon to complete the adsorption process. The adsorption rate at low membrane temperatures agrees with the golden rule estimate to lowest order in the coupling constant for values greater than a critical coupling strength. Below this critical coupling strength, the adsorption rate is exponentially suppressed by a phonon reduction factor whose exponent diverges with increasing adsorbent size. The rate changes discontinuously with coupling strength for low temperature membranes, and the magnitude of the discontinuity decreases with increasing temperature. These variational results suggest the quantum adsorption model may contain a first-order quantum phase transition.
description: 10 pages, 4 figures
Multi-Component Dark Matter from Minimal Flavor Violation
Creators: name: Mescia, Federico
name: Okawa, Shohei
name: Wu, Keyun
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Minimal Flavor Violation (MFV) offers an appealing framework for exploring physics beyond the Standard Model. Interestingly, within the MFV framework, a new colorless field that transforms non-trivially under a global ${\rm SU}(3)^3$ quark flavor group can naturally be stable. Such a new field is thus a promising dark matter candidate, provided it is electrically neutral. We extend the MFV framework for dark matter and demonstrate that dark matter can naturally be multi-component across a broad parameter space. For illustration, we consider a gauge singlet, flavor triplet scalar field and identify parameter spaces for multi-component dark matter, where only the lightest flavor component is absolutely stable and heavy flavor components are decaying with lifetimes sufficiently longer than the age of the universe. Phenomenological, cosmological and astrophysical aspects of multi-component flavored dark matter are briefly discussed.
description: 23 pages + appendices and references, 7 figures
Probing heavy meson lightcone distribution amplitudes with heavy quark spin symmetry
Creators: name: Deng, Zhi-Fu
name: Wang, Wei
name: Wei, Yan-Bing
name: Zeng, Jun
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Building on a previous work~\cite{Han:2024min}, we illustrate that the leading-twist light-cone distribution amplitudes (LCDAs) defined in heavy-quark effective theory (HQET) can be determined through lattice simulations of quasi-distribution amplitudes (quasi-DAs) with a large momentum component $P^z$. Exploiting heavy-quark spin symmetry, we show that the LCDAs for a heavy pseudoscalar and vector meson in the context of HQET exhibit degeneracy, and the degeneracy allows for the utilization of quasi DAs for both pseudoscalar and vector mesons on the lattice. We then derive the relevant short-distance coefficients for the matching between LCDAs defined with QCD fields and HQET LCDAs at the one-loop level. The incorporation of these three quasi DAs can not only confirm the methodology introduced in Ref.~\cite{Han:2024min} but also provides possible insight into power corrections. Discrepancies between the corresponding results offer a valuable perspective for estimating power corrections within the system which are imperative for precise investigations into heavy-meson LCDAs in the future particularly in the context of lattice QCD.
description: 10 pages, 1 figure
What Guides Our Choices? Modeling Developers' Trust and Behavioral Intentions Towards GenAI
Creators: name: Choudhuri, Rudrajit
name: Trinkenreich, Bianca
name: Pandita, Rahul
name: Kalliamvakou, Eirini
name: Steinmacher, Igor
name: Gerosa, Marco
name: Sanchez, Christopher
name: Sarma, Anita
Publisher: name: arXiv
Year: 2024
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Generative AI (genAI) tools, such as ChatGPT or Copilot, are advertised to improve developer productivity and are being integrated into software development. However, misaligned trust, skepticism, and usability concerns can impede the adoption of such tools. Research also indicates that AI can be exclusionary, failing to support diverse users adequately. One such aspect of diversity is cognitive diversity -- variations in users' cognitive styles -- that leads to divergence in perspectives and interaction styles. When an individual's cognitive style is unsupported, it creates barriers to technology adoption. Therefore, to understand how to effectively integrate genAI tools into software development, it is first important to model what factors affect developers' trust and intentions to adopt genAI tools in practice?
 We developed a theoretically grounded statistical model to (1) identify factors that influence developers' trust in genAI tools and (2) examine the relationship between developers' trust, cognitive styles, and their intentions to use these tools in their work. We surveyed software developers (N=238) at two major global tech organizations: GitHub Inc. and Microsoft; and employed Partial Least Squares-Structural Equation Modeling (PLS-SEM) to evaluate our model. Our findings reveal that genAI's system/output quality, functional value, and goal maintenance significantly influence developers' trust in these tools. Furthermore, developers' trust and cognitive styles influence their intentions to use these tools in their work. We offer practical suggestions for designing genAI tools for effective use and inclusive user experience.
description: 13 pages, Accepted by 47th IEEE/ACM International Conference on Software Engineering (ICSE 2025)
The impact of feedback on the evolution of gas density profiles from galaxies to clusters: a universal fitting formula from the Simba suite of simulations
Creators: name: Sorini, Daniele
name: Bose, Sownak
name: Davé, Romeel
name: Anglés-Alcázar, Daniel
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The radial distribution of gas within galactic haloes is connected to the star formation rate and the nature of baryon-driven feedback processes. Using six variants of the hydrodynamic simulation Simba, we study the impact of different stellar/AGN feedback prescriptions on the gas density profiles of haloes in the total mass range $10^{11} \, \mathrm{M}_{\odot} < M_{\mathrm{200c}} < 10^{14} \, \mathrm{M}_{\odot}$ and redshift interval $0
description: Accepted for publication in The Open Journal of Astrophysics; minor changes wrt previous version; conclusions unchanged
Exciton crystal melting and destruction by disorder in bilayer quantum hall system with total filling factor one
Creators: name: Hu, Zhengfei
name: Yang, Kun
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Bilayer quantum hall system with total filling factor 1 was studied in the regime of heavy layer imbalance in a recent transport experiment [Zeng2023, arXiv:2306.16995], with intriguing new findings. We demonstrate in this paper that 1) the exciton Wigner crystal in this regime can melt into a superfluid phase, giving rise to re-entrant superfluid behavior; 2) in the presence of disorder, electron and hole Wigner crystals in the two layers go through a locking/decoupling transition as layer separation increases, resulting in a sudden change in the counter flow conductance. Comparison will be made with the findings of experiments.
description: 12 pages, 3 figures
Polarization Pinning at Antiphase Boundaries in Multiferroic YbFeO$_3$
Creators: name: Ren, Guodong
name: Omprakash, Pravan
name: Li, Xin
name: Yun, Yu
name: Thind, Arashdeep S.
name: Xu, Xiaoshan
name: Mishra, Rohan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The switching characteristics of ferroelectrics and multiferroics are influenced by the interaction of topological defects with domain-walls. We report on the pinning of polarization due to antiphase boundaries in thin films of the multiferroic hexagonal YbFeO$_3$. We have directly resolved the atomic structure of a sharp antiphase boundary (APB) in YbFeO$_3$ thin films using a combination of aberration-corrected scanning transmission electron microscopy (STEM) and total energy calculations based on density-functional theory (DFT). We find the presence of a layer of FeO$_6$ octahedra at the APB that bridge the adjacent domains. STEM imaging shows a reversal in the direction of polarization on moving across the APB, which DFT calculations confirm is structural in nature as the polarization reversal reduces the distortion of the FeO$_6$ octahedral layer at the APB. Such APBs in hexagonal perovskites are expected to serve as domain-wall pinning sites and hinder ferroelectric switching of the domains.
description: 16 pages, 4 figures
Generalized compression and compressive search of large datasets
Creators: name: Prior, Morgan E.
name: Howard, Thomas
name: Light, Emily
name: Ishaq, Najib
name: Daniels, Noah M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences
subject: E.2; E.4; H.3.2; H.3.3; H.1.1
subject: 68P20

description: The Big Data explosion has necessitated the development of search algorithms that scale sub-linearly in time and memory.
 While compression algorithms and search algorithms do exist independently, few algorithms offer both, and those which do are domain-specific.
 We present panCAKES, a novel approach to compressive search, i.e., a way to perform $k$-NN and $ρ$-NN search on compressed data while only decompressing a small, relevant, portion of the data.
 panCAKES assumes the manifold hypothesis and leverages the low-dimensional structure of the data to compress and search it efficiently.
 panCAKES is generic over any distance function for which the distance between two points is proportional to the memory cost of storing an encoding of one in terms of the other.
 This property holds for many widely-used distance functions, e.g. string edit distances (Levenshtein, Needleman-Wunsch, etc.) and set dissimilarity measures (Jaccard, Dice, etc.).
 We benchmark panCAKES on a variety of datasets, including genomic, proteomic, and set data.
 We compare compression ratios to gzip, and search performance between the compressed and uncompressed versions of the same dataset.
 panCAKES achieves compression ratios close to those of gzip, while offering sub-linear time performance for $k$-NN and $ρ$-NN search.
 We conclude that panCAKES is an efficient, general-purpose algorithm for exact compressive search on large datasets that obey the manifold hypothesis.
 We provide an open-source implementation of panCAKES in the Rust programming language.
Polarization of active galactic nuclei with significant VLBI-Gaia displacements
Creators: name: Blinov, Dmitry
name: Arshinova, Arina
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Numerous studies have reported significant displacements in the coordinates of active galactic nuclei between measurements using radio interferometry techniques and those obtained by the Gaia space observatory. There is a consensus that these discrepancies do indeed manifest astrometrically resolved sub-components of AGN rather than random measurement noise. Among other evidence, it has been reported that AGN with VLBI-to-Gaia displacements (VGD) pointing downstream their parsec-scale radio jets exhibit higher optical polarization compared to sources with the opposite VGD orientation. We aim to verify this previously reported connection between optical polarization and VGD-jet angle using a larger dataset of polarimetric measurements and updated Gaia DR3 positions. We also seek additional evidence supporting the disc-jet dichotomy as an explanation of such a connection by using mm-wave polarization and multi-band optical polarization measurements. We performed optical polarimetric observations of 152 AGN using three telescopes. We cross-match public astrometric data from VLBI and Gaia experiments, obtain corresponding positional displacements, and join this catalog with the polarimetric and jet directions data. AGN with downstream VGD are confirmed to have significantly higher optical fractional polarization than the upstream sample. At the same time, the mm-wavelength polarization of the two samples demonstrates very similar distributions. Our results support the hypothesis that the VLBI-to-Gaia displacements pointing down the radio jet are likely caused by a component in the jet emitting highly polarized synchrotron radiation and dominating in the overall optical emission. The upstream-oriented VGD are likely to be produced by the low-polarized emission of the central engine sub-components dominating in the optical.
description: 7 pages, 5 figures, accepted by Astronomy and Astrophysics
Self-Organizing Maps of Unbiased Ligand-Target Binding Pathways and Kinetics
Creators: name: Callea, Lara
name: Caprai, Camilla
name: Bonati, Laura
name: Giorgino, Toni
name: Motta, Stefano
Publisher: name: arXiv
Year: 2024
Subjects: subject: Biomolecules (q-bio.BM)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: The interpretation of ligand-target interactions at atomistic resolution is central to most efforts in computational drug discovery and optimization. However, the highly dynamic nature of protein targets, as well as possible induced fit effects, makes difficult to sample many interactions effectively with docking studies or even with large-scale molecular dynamics (MD) simulations. We propose a novel application of Self-Organizing Maps (SOM) to address the sampling and dynamic mapping tasks, particularly in cases involving ligand flexibility and induced fit. The SOM approach offers a data-driven strategy to create a map of the interaction process and pathways based on unbiased MD. Furthermore, we show how the preliminary SOM mapping is complementary to kinetic analysis, both with the employment of network-based approaches and Markov State Models (MSM). We demonstrate the method by comprehensively mapping a large dataset of 640 μs of unbiased trajectories sampling the recognition process between the phosphorylated YEEI peptide and its high-specificity target Lck-SH2. The integration of SOM into unbiased simulation protocols significantly advances our understanding of the ligand binding mechanism. This approach serves as a potent tool for mapping intricate ligand-target interactions with unprecedented detail, thereby enhancing the characterization of kinetic properties crucial to drug design.
description: The following article has been accepted by JCP. After it is published, it will be found at publishing.aip.org
The Viscosity of Liquids in the Dual Model
Creators: name: Peluso, Fabio
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chemical Physics (physics.chem-ph)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: A reliable model of viscosity in liquids using a dual liquid model framework is developed. The analytical expression arrived at exhibits the correct T-dependence Arrhenius-like. It is compared with the values of viscosity for water with acceptable accuracy and those related to the mechano-thermal effect in liquids under low-frequency shear. It has even been shown that a numerical approach of viscosity in liquids dealt with as dual systems provides good agreement with experimental data. The expression of viscosity shows an explicit dependence upon the sound velocity and the collective vibratory degrees of freedom excited at a given temperature. The terms involved depend upon the Boltzmann and Planck constants. Finally, the physical model is coherent with the postulate of microscopic reversibility as well as with the time's arrow for macroscopic dissipative mechanisms.
description: The text consists of 29 pages, plus a list of references, 4 Figures and one Table. Keywords: viscosity; liquid theory; phonons; liquid dual models; shear viscosity
Enhancing Recommendation with Denoising Auxiliary Task
Creators: name: Liu, Pengsheng
name: Zheng, Linan
name: Chen, Jiale
name: Zhang, Guangfa
name: Xu, Yang
name: Fang, Jinyun
Publisher: name: arXiv
Year: 2024
Subjects: subject: Information Retrieval (cs.IR)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The historical interaction sequences of users plays a crucial role in training recommender systems that can accurately predict user preferences. However, due to the arbitrariness of user behavior, the presence of noise in these sequences poses a challenge to predicting their next actions in recommender systems. To address this issue, our motivation is based on the observation that training noisy sequences and clean sequences (sequences without noise) with equal weights can impact the performance of the model. We propose a novel self-supervised Auxiliary Task Joint Training (ATJT) method aimed at more accurately reweighting noisy sequences in recommender systems. Specifically, we strategically select subsets from users' original sequences and perform random replacements to generate artificially replaced noisy sequences. Subsequently, we perform joint training on these artificially replaced noisy sequences and the original sequences. Through effective reweighting, we incorporate the training results of the noise recognition model into the recommender model. We evaluate our method on three datasets using a consistent base model. Experimental results demonstrate the effectiveness of introducing self-supervised auxiliary task to enhance the base model's performance.
Higher-order soft-gluon corrections for $t{\bar t}Z$ cross sections
Creators: name: Kidonakis, Nikolaos
name: Foster, Chris
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate higher-order soft-gluon corrections for the associated production of a top-antitop quark pair and a $Z$ boson ($t{\bar t}Z$ production) in proton-proton collisions. We find that these corrections are numerically dominant and large. We present approximate NNLO (aNNLO) and approximate N$^3$LO (aN$^3$LO) cross sections that add, respectively, second-order and third-order soft-gluon corrections to the exact NLO QCD result. We also add electroweak (EW) corrections through NLO. We estimate uncertainties that arise from scale dependence, which are smaller at higher orders, and from parton distribution functions. We compare our aN$^3$LO QCD + NLO EW theoretical results to measurements of $t{\bar t}Z$ cross sections from the LHC and find good agreement. We also calculate single-particle-inclusive differential distributions in top-quark transverse momentum and rapidity.
description: 10 pages, 3 figures. arXiv admin note: text overlap with arXiv:2312.00861
Structure formation with primordial black holes: collisional dynamics, binaries, and gravitational waves
Creators: name: Delos, M. Sten
name: Rantala, Antti
name: Young, Sam
name: Schmidt, Fabian
Publisher: name: arXiv
Year: 2024
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Primordial black holes (PBHs) could compose the dark matter content of the Universe. We present the first simulations of cosmological structure formation with PBH dark matter that consistently include collisional few-body effects, post-Newtonian orbit corrections, orbital decay due to gravitational wave emission, and black-hole mergers. We carefully construct initial conditions by considering the evolution during radiation domination as well as early-forming binary systems. We identify numerous dynamical effects due to the collisional nature of PBH dark matter, including evolution of the internal structures of PBH halos and the formation of a hot component of PBHs. We also study the properties of the emergent population of PBH binary systems, distinguishing those that form at primordial times from those that form during the nonlinear structure formation process. These results will be crucial to sharpen constraints on the PBH scenario derived from observational constraints on the gravitational wave background. Even under conservative assumptions, the gravitational radiation emitted over the course of the simulation appears to exceed current limits from ground-based experiments, but this depends on the evolution of the gravitational wave spectrum and PBH merger rate toward lower redshifts.
description: 46 pages, 26 figures; matches published version
Study of radon removal performance of silver-ion exchanged zeolite from air for underground experiments
Creators: name: Sone, T.
name: Takeuchi, Y.
name: Matsukura, M.
name: Nakano, Y.
name: Ogawa, H.
name: Sekiya, H.
name: Wakihara, T.
name: Hirano, S.
name: Taniguchi, A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Radon is a common background source for underground astroparticle physics experiments and its removal is essential. In this study, we fabricated several prototype silver-ion exchanged zeolites, measured their radon adsorption properties, and evaluated their applicability for radon removal in underground experiments. As a result, we succeeded in producing a prototype silver-ion exchanged zeolite that showed better radon adsorption properties than preceding studies.
description: 14 pages, 13 figures
Simulation of fidelity in entanglement-based networks with repeater chains
Creators: name: Castro, David Pérez
name: Vilas, Ana Fernández
name: Fernández-Veiga, Manuel
name: Rodríguez, Mateo Blanco
name: Redondo, Rebeca P. Díaz
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: 68M10

description: We implement a simulation environment on top of NetSquid that is specifically designed for estimating the end-to-end fidelity across a path of quantum repeaters or quantum switches. The switch model includes several generalizations which are not currently available in other tools, and are useful for gaining insight into practical and realistic quantum network engineering problems: an arbitrary number of memory registers at the switches, simplicity in including entanglement distillation mechanisms, arbitrary switching topologies, and more accurate models for the depolarization noise. An illustrative case study is presented, namely a comparison in terms of performance between a repeater chain where repeaters can only swap sequentially, and a single switch equipped with multiple memory registers, able to handle multiple swapping requests.
Low-latitude magnetic flux emergence on rapidly rotating solar-type stars
Creators: name: Işık, Emre
name: Solanki, Sami K.
name: Cameron, Robert H.
name: Shapiro, Alexander I.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Besides a dense coverage of their high latitudes by starspots, rapidly rotating cool stars also display low-latitude spots in Doppler images, although generally with a lower coverage. In contrast, flux emergence models of fast-rotating stars predict strong poleward deflection of radially rising magnetic flux as the Coriolis effect dominates over buoyancy, leaving a spot-free band around the equator. To resolve this discrepancy, we consider a flux tube near the base of the convection zone in a solar-type star rotating eight times faster than the Sun, assuming field intensification by weak-tube explosions. For the intensification to continue into to the buoyancy-dominated regime, the upper convection zone must have a significantly steeper temperature gradient than in the Sun, by a factor that is comparable with that found in 3D simulations of rotating convection. Within the hypothesis that stellar active regions stem from the base of the convection zone, flux emergence between 1-20 degree latitudes requires highly supercritical field strengths of up to 500 kG in rapidly rotating stars. These field strengths require explosions of 100-kG tubes within the convection zone, compatible with reasonable values of the superadiabatic temperature gradient associated with the more rapid rotation.
description: 12 pages, 9 figures, published in ApJ
Rare-Earth Chalcogenides: An Inspiring Playground For Exploring Frustrated Magnetism
Creators: name: Xie, Mingtai
name: Zhuo, Wenzhen
name: Cai, Yanzhen
name: Zhang, Zheng
name: Zhang, Qingming
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The rare-earth chalcogenide $ARECh_{2}$ family ($A =$ alkali metal or monovalent ions, $RE =$ rare earth, $Ch =$ chalcogen) has emerged as a paradigmatic platform for studying frustrated magnetism on a triangular lattice. The family members exhibit a variety of ground states, from quantum spin liquid to exotic ordered phases, providing fascinating insight into quantum magnetism. Their simple crystal structure and chemical tunability enable systematic exploration of competing interactions in quantum magnets. Recent neutron scattering and thermodynamic studies have revealed rich phase diagrams and unusual excitations, refining theoretical models of frustrated systems. This review provides a succinct introduction to $ARECh_{2}$ research. It summarizes key findings on crystal structures, single-ion physics, magnetic Hamiltonians, ground states, and low-energy excitations. By highlighting current developments and open questions, we aim to catalyze further exploration and deeper physical understanding on this frontier of quantum magnetism.
description: 15 pages, 5 figures
Pilot-wave theory and the search for new physics
Creators: name: Valentini, Antony
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show how pilot-wave theory points to new physics, beyond quantum mechanics, in three distinct ways. First, generalised cosmological initial conditions, departing from the Born rule, can lead to observable anomalies in the cosmic microwave background and in relic cosmological particles. Second, a breakdown of the Born rule in the deep quantum-gravity regime, with gravitational corrections that render the Born rule semiclassically unstable, can create anomalies in Hawking radiation from evaporating black holes. Third, a regularised equation of motion that remains finite at nodes of the wave function generates corrections to the Born rule at short distances, while a natural time-dependent generalisation implies an instability of quantum equilibrium at short times, effects which may be observable in high-energy collisions.
description: 26 pages. To appear in: 100 Years of Matter Waves, special issue, Annales de la Fondation Louis de Broglie
Chlamydopteryx eurobium Kirkaldy
Creators: name: Gnezdilov, Vladimir M.
name: Fletcher, Murray J.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Issidae
Chlamydopteryx
Chlamydopteryx eurobium

description: Chlamydopteryx eurobium Kirkaldy
(Fig. 8)
Chlamydopteryx eurobium Kirkaldy 1907: 103.
Type material examined. 1 female syntype “Cairns, Q. / Austr. 8.1904.” “Chlamydop - / teryx / eurobium / Kirk. / Ƥ 449. / holotype ” (BPBM)
Distribution. Queensland.
Note. In his original description, Kirkaldy (1907) provides a note that the male has the “pygophore as in C. ridicularis ”. This indicates that he examined at least one male. The specimen labelled as “ holotype ” has not been validated as such by publication and is here regarded as a syntype. If a male specimen can be found in BPBM matching the original collection details, then it is available to be designated as lectotype.
description: Published as part of Gnezdilov, Vladimir M. & Fletcher, Murray J., 2010, A review of the Australian genera of the planthopper family Issidae (Hemiptera: Fulgoromorpha) with description of an unusual new species of Chlamydopteryx Kirkaldy, pp. 35-45 in Zootaxa 2366 on page 39, DOI: 10.5281/zenodo.275776
Tetrica Stal
Creators: name: Gnezdilov, Vladimir M.
name: Fletcher, Murray J.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Issidae
Tetrica

description: Genus Tetrica Stål
Tetrica Stål 1866: 208. Type species: Tetrica fusca Stål, designated by Stål 1870 (Burma = Myanmar).
Note. Australian species described in this primarily oriental genus are here retained with their current combinations until Tetrica has been revised in the Oriental Region.
description: Published as part of Gnezdilov, Vladimir M. & Fletcher, Murray J., 2010, A review of the Australian genera of the planthopper family Issidae (Hemiptera: Fulgoromorpha) with description of an unusual new species of Chlamydopteryx Kirkaldy, pp. 35-45 in Zootaxa 2366 on page 42, DOI: 10.5281/zenodo.275776
Sarima Melichar
Creators: name: Gnezdilov, Vladimir M.
name: Fletcher, Murray J.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Issidae
Sarima

description: Genus Sarima Melichar
Sarima Melichar 1903: 224. Type species: Sarima illibata Melichar 1903, subsequently designated by Distant 1906: 342 (Ceylon = Sri Lanka).
Note. This genus is well known in the Oriental Region and until the Oriental fauna has been revised, the correct generic placement of the following species is uncertain. It is retained with its current combination pending further knowledge of the oriental fauna.
description: Published as part of Gnezdilov, Vladimir M. & Fletcher, Murray J., 2010, A review of the Australian genera of the planthopper family Issidae (Hemiptera: Fulgoromorpha) with description of an unusual new species of Chlamydopteryx Kirkaldy, pp. 35-45 in Zootaxa 2366 on page 42, DOI: 10.5281/zenodo.275776
Tetrica tumidifrons Jacobi
Creators: name: Gnezdilov, Vladimir M.
name: Fletcher, Murray J.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Issidae
Tetrica
Tetrica tumidifrons

description: Tetrica tumidifrons Jacobi
(Figs 12, 22)
Tetrica tumidifrons Jacobi 1928: 14.
Type material examined. Holotype (by monotypy), Malanda, Qld (NHRS).
Other material examined. Australia, Queensland: 1 male, 5 females, Malanda, 7 km NE of Atherton tableland, rain forest, piège lumineaux, 3-8.III.1997, T. Bourgoin (MNHN).
Distribution. Queensland.
Note. Jacobi (1928) notes that only one specimen was available to him and this is here recognised as the holotype by monotypy. Photographs of this specimen in NHRS were examined to establish the identity of the species. Its sex is unknown.
description: Published as part of Gnezdilov, Vladimir M. & Fletcher, Murray J., 2010, A review of the Australian genera of the planthopper family Issidae (Hemiptera: Fulgoromorpha) with description of an unusual new species of Chlamydopteryx Kirkaldy, pp. 35-45 in Zootaxa 2366 on page 42, DOI: 10.5281/zenodo.275776
Sarima novaehollandiae Jacobi
Creators: name: Gnezdilov, Vladimir M.
name: Fletcher, Murray J.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Issidae
Sarima
Sarima novaehollandiae

description: Sarima novaehollandiae Jacobi
(Fig. 13)
Sarima novaehollandiae Jacobi 1928: 14.
Type material. Syntypes 2 (sex unknown), Cedar Creek, March (NHRS).
Distribution. Queensland.
Note. Jacobi (1928) described material collected during 1910-1913 but his original description gives only an indication of the month, not year, of collection. Photographs of a syntype of S. novaehollandiae deposited in NHRS were examined in order to establish the identity of this species.
description: Published as part of Gnezdilov, Vladimir M. & Fletcher, Murray J., 2010, A review of the Australian genera of the planthopper family Issidae (Hemiptera: Fulgoromorpha) with description of an unusual new species of Chlamydopteryx Kirkaldy, pp. 35-45 in Zootaxa 2366 on pages 43-44, DOI: 10.5281/zenodo.275776
Jujubinus Monterosato 1884
Creators: name: Martín-González, Esther
name: Vera-Peláez, José Luis
name: Castillo, Carolina
name: Lozano-Francisco, M. Carmen
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Archaeogastropoda
Trochidae
Jujubinus

description: Genus Jujubinus Monterosato, 1884
Type species. Trochus matoni Payraudeau, 1826.
description: Published as part of Martín-González, Esther, Vera-Peláez, José Luis, Castillo, Carolina & Lozano-Francisco, M. Carmen, 2018, New fossil gastropod species (Mollusca: Gastropoda) from the upper Miocene of the Canary Islands (Spain), pp. 191-218 in Zootaxa 4422 (2) on page 202, DOI: 10.11646/zootaxa.4422.2.3, http://zenodo.org/record/1251497
Phorcus Risso 1826
Creators: name: Martín-González, Esther
name: Vera-Peláez, José Luis
name: Castillo, Carolina
name: Lozano-Francisco, M. Carmen
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Archaeogastropoda
Trochidae
Phorcus

description: Genus Phorcus Risso, 1826
Type species. Phorcus margaritaceus Risso, 1826
description: Published as part of Martín-González, Esther, Vera-Peláez, José Luis, Castillo, Carolina & Lozano-Francisco, M. Carmen, 2018, New fossil gastropod species (Mollusca: Gastropoda) from the upper Miocene of the Canary Islands (Spain), pp. 191-218 in Zootaxa 4422 (2) on page 203, DOI: 10.11646/zootaxa.4422.2.3, http://zenodo.org/record/1251497
Gibbula Risso 1826
Creators: name: Martín-González, Esther
name: Vera-Peláez, José Luis
name: Castillo, Carolina
name: Lozano-Francisco, M. Carmen
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Archaeogastropoda
Trochidae
Gibbula

description: Genus Gibbula Risso, 1826
Type species. Trochus magus Linnaeus, 1758.
description: Published as part of Martín-González, Esther, Vera-Peláez, José Luis, Castillo, Carolina & Lozano-Francisco, M. Carmen, 2018, New fossil gastropod species (Mollusca: Gastropoda) from the upper Miocene of the Canary Islands (Spain), pp. 191-218 in Zootaxa 4422 (2) on page 205, DOI: 10.11646/zootaxa.4422.2.3, http://zenodo.org/record/1251497
Issidae
Creators: name: Gnezdilov, Vladimir M.
name: Fletcher, Murray J.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Issidae

description: Key to Australian genera of the family Issidae
1. Fore wings with concave costal margin (Figure 14)........................................................................... Orinda Kirkaldy
- Fore wings with convex costal margin ........................................................................................................................ 2
2. Fore wings with radius simple, bearing characteristic vein-loop proximally (Figure 15).................. Sarima Melichar
- Fore wings with radius bifurcate, branches long, without vein-loop........................................................................... 3
3. Fore wings with first radial vein sinuate near base (Figure 16) ........................................... Apsadaropteryx Kirkaldy
- Fore wings with first radial vein evenly convex near base, not sinuate (Figure 17) ................................................... 4
4. Metope rather wide (e.g. Figures 3, 4). Hind wings rudimentary or well developed, with postcubitus simple (Pcu 1), without transverse veins between postcubitus and first anal vein (A1) (Figure 19) ............ Chlamydopteryx Kirkaldy
- Metope rather elongate (Figure 18). Hind wings always well developed, with postcubitus pentafurcate (Pcu 5) and two transverse veins between postcubitus and first anal vein (A1) (Figure 22) .......................................... Tetrica Stål
description: Published as part of Gnezdilov, Vladimir M. & Fletcher, Murray J., 2010, A review of the Australian genera of the planthopper family Issidae (Hemiptera: Fulgoromorpha) with description of an unusual new species of Chlamydopteryx Kirkaldy, pp. 35-45 in Zootaxa 2366 on page 44, DOI: 10.5281/zenodo.275776
Patella Linnaeus 1758
Creators: name: Martín-González, Esther
name: Vera-Peláez, José Luis
name: Castillo, Carolina
name: Lozano-Francisco, M. Carmen
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Archaeogastropoda
Patellidae
Patella

description: Genus Patella Linnaeus, 1758
Type species. Patella vulgata Linnaeus, 1758.
description: Published as part of Martín-González, Esther, Vera-Peláez, José Luis, Castillo, Carolina & Lozano-Francisco, M. Carmen, 2018, New fossil gastropod species (Mollusca: Gastropoda) from the upper Miocene of the Canary Islands (Spain), pp. 191-218 in Zootaxa 4422 (2) on page 194, DOI: 10.11646/zootaxa.4422.2.3, http://zenodo.org/record/1251497
Cerithium Bruguiere 1789
Creators: name: Martín-González, Esther
name: Vera-Peláez, José Luis
name: Castillo, Carolina
name: Lozano-Francisco, M. Carmen
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Neotaenioglossa
Cerithiidae
Cerithium

description: Genus Cerithium Bruguière, 1789
Type species. Cerithium adansonii Bruguière, 1792
description: Published as part of Martín-González, Esther, Vera-Peláez, José Luis, Castillo, Carolina & Lozano-Francisco, M. Carmen, 2018, New fossil gastropod species (Mollusca: Gastropoda) from the upper Miocene of the Canary Islands (Spain), pp. 191-218 in Zootaxa 4422 (2) on page 208, DOI: 10.11646/zootaxa.4422.2.3, http://zenodo.org/record/1251497
Tectarius Valenciennes 1832
Creators: name: Martín-González, Esther
name: Vera-Peláez, José Luis
name: Castillo, Carolina
name: Lozano-Francisco, M. Carmen
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Littorinimorpha
Littorinidae
Tectarius

description: Genus Tectarius Valenciennes, 1832
Type species. Tectarius coronatus (Valenciennes, 1832).
description: Published as part of Martín-González, Esther, Vera-Peláez, José Luis, Castillo, Carolina & Lozano-Francisco, M. Carmen, 2018, New fossil gastropod species (Mollusca: Gastropoda) from the upper Miocene of the Canary Islands (Spain), pp. 191-218 in Zootaxa 4422 (2) on page 209, DOI: 10.11646/zootaxa.4422.2.3, http://zenodo.org/record/1251497