cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Experimental Simulation of Larger Quantum Circuits with Fewer Superconducting Qubits
Creators: name: Ying, Chong
name: Cheng, Bin
name: Zhao, Youwei
name: Huang, He-Liang
name: Zhang, Yu-Ning
name: Gong, Ming
name: Wu, Yulin
name: Wang, Shiyu
name: Liang, Futian
name: Lin, Jin
name: Xu, Yu
name: Deng, Hui
name: Rong, Hao
name: Peng, Cheng-Zhi
name: Yung, Man-Hong
name: Zhu, Xiaobo
name: Pan, Jian-Wei
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Although near-term quantum computing devices are still limited by the quantity and quality of qubits in the so-called NISQ era, quantum computational advantage has been experimentally demonstrated. Moreover, hybrid architectures of quantum and classical computing have become the main paradigm for exhibiting NISQ applications, where low-depth quantum circuits are repeatedly applied. In order to further scale up the problem size solvable by the NISQ devices, it is also possible to reduce the number of physical qubits by "cutting" the quantum circuit into different pieces. In this work, we experimentally demonstrated a circuit-cutting method for simulating quantum circuits involving many logical qubits, using only a few physical superconducting qubits. By exploiting the symmetry of linear-cluster states, we can estimate the effectiveness of circuit-cutting for simulating up to 33-qubit linear-cluster states, using at most 4 physical qubits for each subcircuit. Specifically, for the 12-qubit linear-cluster state, we found that the experimental fidelity bound can reach as much as 0.734, which is about 19\% higher than a direct simulation {on the same} 12-qubit superconducting processor. Our results indicate that circuit-cutting represents a feasible approach of simulating quantum circuits using much fewer qubits, while achieving a much higher circuit fidelity.
Static and dynamical correlation in diradical molecules by Quantum Monte Carlo using the Jastrow Antisymmetrized Geminal Power ansatz
Creators: name: Zen, Andrea
name: Coccia, Emanuele
name: Luo, Ye
name: Sorella, Sandro
name: Guidoni, Leonardo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Diradical molecules are essential species involved in many organic and inorganic chemical reactions. The computational study of their electronic structure is often challenging, because a reliable description of the correlation, and in particular of the static one, requires multi-reference techniques. The Jastrow correlated Antisymmetrized Geminal Power (JAGP) is a compact and efficient wave function ansatz, based on the valence-bond representation, which can be used within Quantum Monte Carlo (QMC) approaches. The AGP part can be rewritten in terms of molecular orbitals, obtaining a multi-determinant expansion with zero-seniority number. In the present work we demonstrate the capability of the JAGP ansatz to correctly describe the electronic structure of two diradical prototypes: the orthogonally twisted ethylene, C2H4, and the methylene, CH2, representing respectively a homosymmetric and heterosymmetric system. On the other hand, we show that the simple ansatz of a Jastrow correlated Single Determinant (JSD) wave function is unable to provide an accurate description of the electronic structure in these diradical molecules, both at variational level and, more remarkably, in the fixed-nodes projection schemes showing that a poor description of the static correlation yields an inaccurate nodal surface. The suitability of JAGP to correctly describe diradicals with a computational cost comparable with that of a JSD calculation, in combination with a favorable scalability of QMC algorithms with the system size, opens new perspectives in the ab initio study of large diradical systems, like the transition states in cycloaddition reactions and the thermal isomerization of biological chromophores.
Optimization of Artificial Neural Networks models applied to the identification of images of asteroids' resonant arguments
Creators: name: Carruba, Valerio
name: Aljbaae, Safwan
name: Caritá, Gabriel
name: Domingos, Rita Cassia
name: Martins, Bruno
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Machine Learning (cs.LG)
subject: Image and Video Processing (eess.IV)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The asteroidal main belt is crossed by a web of mean-motion and secular resonances, that occur when there is a commensurability between fundamental frequencies of the asteroids and planets. Traditionally, these objects were identified by visual inspection of the time evolution of their resonant argument, which is a combination of orbital elements of the asteroid and the perturbing planet(s). Since the population of asteroids affected by these resonances is, in some cases, of the order of several thousand, this has become a taxing task for a human observer. Recent works used Convolutional Neural Networks (CNN) models to perform such task automatically. In this work, we compare the outcome of such models with those of some of the most advanced and publicly available CNN architectures, like the VGG, Inception and ResNet. The performance of such models is first tested and optimized for overfitting issues, using validation sets and a series of regularization techniques like data augmentation, dropout, and batch normalization. The three best-performing models were then used to predict the labels of larger testing databases containing thousands of images. The VGG model, with and without regularizations, proved to be the most efficient method to predict labels of large datasets. Since the Vera C. Rubin observatory is likely to discover up to four million new asteroids in the next few years, the use of these models might become quite valuable to identify populations of resonant minor bodies.
description: 15 pages, 13 figures, 3 tables. Accepted for publication at Celestial Mechanics and Dynamical Astronomy
VIMAP: an Interactive Program Providing Radio Spectral Index Maps of Active Galactic Nuclei
Creators: name: Kim, Jae-Young
name: Trippe, Sascha
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a GUI-based interactive Python program, VIMAP, which generates radio spectral index maps of active galactic nuclei (AGN) from Very Long Baseline Interferometry (VLBI) maps obtained at different frequencies. VIMAP is a handy tool for the spectral analysis of synchrotron emission from AGN jets, specifically of spectral index distributions, turn-over frequencies, and core-shifts. In general, the required accurate image alignment is difficult to achieve because of a loss of absolute spatial coordinate information during VLBI data reduction (self-calibration) and/or intrinsic variations of source structure as function of frequency. These issues are overcome by VIMAP which in turn is based on the two-dimensional cross-correlation algorithm of Croke and Gabuzda (2008). In this paper, we briefly review the problem of aligning VLBI AGN maps, describe the workflow of VIMAP, and present an analysis of archival VLBI maps of the active nucleus 3C 120.
description: 5 pages, 4 figures, 2 tables; to appear in JKAS (received September 5, 2014; accepted October 10, 2014)
Simulations of an ultracold, neutral plasma with equal masses
Creators: name: Robicheaux, F.
name: Bender, B. J.
name: Phillips, M. A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The results of a theoretical investigation of an ultracold, neutral plasma composed of equal mass positive and negative charges are reported. In our simulations, the plasma is created by the fast dissociation of a neutral particle. The temperature of the plasma is controlled by the relative energy of the dissociation. We studied the early time evolution of this system where the initial energy was tuned so that the plasma is formed in the strongly coupled regime. In particular, we present results on the temperature evolution and three body recombination. In the weakly coupled regime, we studied how an expanding plasma thermalizes and how the scattering between ions affects the expansion. Because the expansion causes the density to drop, the velocity distribution only evolves for a finite time with the final distribution depending on the number of particles and initial temperature of the plasma.
First-order transitions in spin chains coupled to quantum baths
Creators: name: Perroni, C. A.
name: De Candia, A.
name: Cataudella, V.
name: Fazio, R.
name: De Filippis, G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We show that tailoring the dissipative environment allows to change the features of continuous quantum phase transitions and, even, induce first order transitions in ferromagnetic spin chains. In particular, using a numerically exact quantum Monte Carlo method for the paradigmatic Ising chain of one-half spins in a transverse magnetic field, we find that spin couplings to local quantum boson baths in the Ohmic regime can drive the transition from the second to the first order even for a low dissipation strength. Moreover, using a variational mean-field approach for the treatment of spin-spin and spin-boson interactions, we point out that phase discontinuities are ascribable to a dissipation induced effective magnetic field which is intrinsically related to the bath quantum fluctuations and vanishes for classical baths. The effective field is able to switch the sign of the magnetization along the direction of spin-spin interactions. The results can be potentially tested in recent quantum simulators and are relevant for quantum sensing since the spin system could not only detect the properties of non-classical baths, but also the effects of weak magnetic fields.
description: 5 pages, 4 figures
The governance of conservation and economic restructuring in a historic city : York 1966-2011
Creators: name: French, Jonathan
Publisher: name: Leeds Beckett University
Year: 2022
Subjects: Uncategorized

description: Many historic cities have experienced the challenges common to other cities since the 1960s, including deindustrialisation. An additional issue has been the need to conserve the historic built environment in a period of economic change. Historic cities have also seen a growth in the appreciation of heritage related employment opportunities in the service economy and especially in tourism. This thesis focuses on the role of local governance practice in the management of that process of change, examining what specific characteristics in historic cities might build and reinforce effective governance mechanisms. This focus has provided the opportunity to position historic cities, and particularly conservation, in the wider theoretical discourse on local governance.
 York provided an opportunity for a single case study, being a ‘jewel’ historic city that also experienced significant losses of manufacturing employment. An historical institutionalist approach was adopted enabling a thick and deep understanding of the processes of institutional change over a long period of development and economic restructuring. Narratives were prepared on the governance of conservation, economic development and tourism that demonstrate how the qualities of a place influenced governance mechanisms. Evidence was gathered from documentary and interview sources, the latter especially informing the motivations of participants in governance processes. The thesis concludes that regime theory is appropriate to explain the interaction of national, local and voluntary organisations in conservation in the research period. The role of independent institutions in York, with the financial capacity to act, (in science development and tourism as well as conservation), enabled some of the governance mechanisms to be categorised as regimes. Underpinning governance activity in York has been strength in social capital formation, occurring over a very long historic period and maintained through processes of path dependence. The discovery of regimes challenges a literature that postulates regimes as USA centric and not a feature of UK governance. Overall the thesis demonstrates the importance of a historical approach to institutionalist studies.
Acoustic interaction force between two particles immersed in a viscoelastic fluid
Creators: name: Eslami, Fateme
name: Hamzehpour, Hossein
name: Derikvandi, Sanaz
name: Bahrani, S. Amir
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The interaction acoustic radiation force in a standing plane wave applied to each small solid sphere in a two-particle system immersed in a viscoelastic fluid is studied in a framework based on perturbation theory. In this work, the first- and second-order perturbation theories are used in the governing equations with considering the upper-convected maxwell model to obtain mathematical modeling. We use the finite element method to carry out simulations and describe the behavior of the viscoelastic fluid. The mathematical development is validated from three literature case studies: a one-particle system in a viscous fluid, a two-particle system in a viscous fluid, and a one-particle system in a viscoelastic fluid. The novelty of this study is to establish the acoustic interaction force between two spherical particles immersed in a viscoelastic fluid. The results show that the acoustic interaction force between two spheres is greater in a viscous fluid in comparison with the viscoelastic fluid with the same shear viscosity. This behavior is due to the relaxation time effect. A mathematical formula is proposed for the acoustic interaction force between particles located close to each other in a viscoelastic fluid.
Data Spaces 101: "Everything you wanted to know about data space but were afraid to ask"
Creators: name: Dietrich, Mark
Publisher: name: Zenodo
Year: 2023
Subjects: data space
governance
data exchange
building blocks
data sovereignty

description: Introduction to Data Spaces, with some focus on initial design questions and governance, as well as relationships BETWEEN data spaces. Why do we need Data Spaces? Different kinds of data, different problems A definition of Data Spaces – exploring what it means How do Data Spaces interact? Purpose, Objectives, Value Creation Designing a Data Space, Building the Governance Framework Compliance Digital Platforms Data Space Governance Data Governance Legal, Operational, Technical Requirements Building Blocks EGI Support for Data Spaces
Advanced MBR processes for wastewater treatment and energy production
Creators: name: Borea, Laura
Publisher: name: Universita degli studi di Salerno
Year: 2016
Subjects: subject: ICAR/03 INGEGNERIA SANITARIA-AMBIENTALE
subject: Fouline
subject: Bioelectrochemical processes
subject: Fouling precursors

description: 2014 - 2015
description: More stringent standards on water quality along with the shortage of vater resources have led to the development of advanced wastewater treatment processes, in order to ensure the respect of discharge limits and the reuse of trated water... [edited by Author]
The Oceanus Moving Group: A New 500 Myr-Old Host for the Nearest Brown Dwarf
Creators: name: Gagné, Jonathan
name: Moranta, Leslie
name: Faherty, Jacqueline K.
name: Kiman, Rocio
name: Couture, Dominic
name: Larochelle, Arnaud René
name: Popinchalk, Mark
name: Morrone, Daniella
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the discovery of the Oceanus moving group, a $\approx$ 500 Myr-old group with 50 members and candidate members at distances 2-50 pc from the Sun using an unsupervised clustering analysis of nearby stars with Gaia DR3 data. This new moving group includes the nearest brown dwarf WISE J104915.57-531906.1 AB (Luhman 16 AB) at a distance of 2 pc, which was previously suspected to be young (600-800 Myr) based on a comparison of its dynamical mass measurements with brown dwarf evolutionary models. We use empirical color-magnitude sequences, stellar activity and gyrochronology to determine that this new group is roughly coeval with the Coma Ber open cluster, with an isochronal age of 510 $\pm$ 95 Myr. This newly discovered group will be useful to refine the age and chemical composition of Luhman 16 AB, which is already one of the best substellar benchmarks known to date. Furthermore, the Oceanus moving group is one of the nearest young moving groups identified to date, making it a valuable laboratory for the study of exoplanets and substellar members, with 8 brown dwarf candidate members already identified here.
description: Accepted in ApJ. 32 pages, 6 figures, 6 tables
Inter-mode reactive coupling induced by waveguide-resonator interaction
Creators: name: Ghulinyan, Mher
name: Manzano, Fernando Ramiro
name: Prtljaga, Nikola
name: Bernard, Martino
name: Pavesi, Lorenzo
name: Pucker, Georg
name: Carusotto, Iacopo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report on a joint theoretical and experimental study of an integrated photonic device consisting of a single mode waveguide vertically coupled to a disk-shaped microresonator. Starting from the general theory of open systems, we show how the presence of a neighboring waveguide induces reactive inter-mode coupling in the resonator, analogous to an off-diagonal Lamb shift from atomic physics. Observable consequences of this coupling manifest as peculiar Fano lineshapes in the waveguide transmission spectra. The theoretical predictions are validated by full vectorial 3D finite element numerical simulations and are confirmed by the experiments.
description: 5 pages, 5 figures
A New Structure in the Deuteron
Creators: name: Sargsian, Misak M.
name: Vera, Frank
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We demonstrate that a paradigm shift from considering the deuteron as a system of bound proton and neutron to considering it as a pseudo-vector system in which we observe proton and neutron, results in a possibility of probing a new "incomplete" P-state like structure on the light-front (LF), at extremely large internal momenta, which can be achieved in high energy transfer electro-disintegration of the deuteron. Investigating the deuteron on the light-front, where the vacuum-fluctuations are suppressed, we found that this new structure, together with conventional S- and D- states, is a leading order in transferred energy of the reaction, thus it is not suppressed on the light-front.The incompleteness of the observed P-state results in a violation of angular condition which can happen only if deuteron contains non-nucleonic structures such as $Δ$$Δ$, $N^*N$ or hidden color components. We demonstrate that experimentally verifiable signatures of "incomplete" P-states are angular anisotropy of LF momentum distribution of the nucleon in the deuteron as well as an enhancement of the tensor polarization strength beyond the S- and D- wave predictions at large internal momenta in the deuteron.
description: Five pages and two figures
Hyperon mixing and universal many-body repulsion in neutron stars
Creators: name: Yamamoto, Y.
name: Furumoto, T.
name: Yasutake, N.
name: Rijken, Th. A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: A multi-pomeron exchange potential (MPP) is proposed as a model for the universal many-body repulsion in baryonic systems on the basis of the Extended Soft Core (ESC) bryon-baryon interaction. The strength of MPP is determined by analyzing the nucleus-nucleus scattering with the G-matrix folding model. The interaction in $ΛN$ channels is shown to reproduce well the experimental $Λ$ binding energies. The equation of state (EoS) in neutron matter with hyperon mixing is obtained including the MPP contribution, and mass-radius relations of neutron stars are derived. It is shown that the maximum mass can be larger than the observed one $2M_{\odot}$ even in the case of including hyperon mixing on the basis of model-parameters determined by terrestrial experiments.
Non-relativistic spin-3 symmetries in 2+1 dimensions from expanded/extended Nappi-Witten algebras
Creators: name: Caroca, Ricardo
name: Peñafiel, Diego M.
name: Salgado-Rebolledo, Patricio
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We show that infinite families of non-relativistic spin-$3$ symmetries in $2+1$ dimensions, which include higher-spin extensions of the Bargmann, Newton-Hooke, non-relativistic Maxwell, and non-relativistic AdS-Lorentz algebras, can be obtained as Lie algebra expansions of two different spin-$3$ extensions of the Nappi-Witten symmetry. These higher-spin Nappi-Witten algebras, in turn, are obtained by means of Inönü-Wigner contractions applied to suitable direct product extensions of $\mathfrak{sl}(3,\mathbb{R})$. Conversely, we show that the same result can be obtained by considering contractions of expanded $\mathfrak{sl}(3,\mathbb{R})$ algebras. The method can be used to define non-relativistic higher-spin Chern-Simon gravity theories in $2+1$ dimensions in a systematic way.
description: 44 pages, typos corrected, references added
Supplementary document for Spatially-coded wavelength-scanning lensless on-chip microscopy for pixel-super-resolved quantitative phase imaging - 7406636.pdf
Creators: name: guo, chengfei
name: ma, haojie
name: Ding, Jiayu
name: Shao, Xiaopeng
name: Peng, Siying
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Biomedical Instrumentation

description: Supplementary materials
Experimental Test of Quantum Jarzynski Equality with a Trapped Ion System
Creators: name: An, Shuoming
name: Zhang, Jing-Ning
name: Um, Mark
name: Lv, Dingshun
name: Lu, Yao
name: Zhang, Junhua
name: Yin, Zhang-qi
name: Quan, H. T.
name: Kim, Kihwan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The past two decades witnessed important developments in the field of non-equilibrium statistical mechanics. Among these developments, the Jarzynski equality, being a milestone following the landmark work of Clausius and Kelvin, stands out. The Jarzynski equality relates the free energy difference between two equilibrium states and the work done on the system through far from equilibrium processes. While experimental tests of the equality have been performed in classical regime, the verification of the quantum Jarzynski equality has not yet been fully demonstrated due to experimental challenges. Here, we report an experimental test of the quantum Jarzynski equality with a single \Yb ion trapped in a harmonic potential. We perform projective measurements to obtain phonon distributions of the initial thermal state. Following that we apply the laser induced force on the projected energy eigenstate, and find transition probabilities to final energy eigenstates after the work is done. By varying the speed of applying the force from equilibrium to far-from equilibrium regime, we verified the quantum Jarzynski equality in an isolated system.
description: 18 pages, 4 figures, 1 table
Constraining Nuclear Symmetry Energy with Multi-messenger Resonant Shattering Flares
Creators: name: Neill, Duncan
name: Preston, Rebecca
name: Newton, William G.
name: Tsang, David
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Much effort is devoted to measuring the nuclear symmetry energy through neutron star (NS) and nuclear observables. Since matter in the NS core may be non-hadronic, observables like radii and tidal deformability may not provide reliable constraints on properties of nucleonic matter. We demonstrate that coincident timing of a resonant shattering flare (RSF) and gravitational wave signal during binary NS inspiral probes the crust-core transition region and provides constraints on the symmetry energy comparable to terrestrial nuclear experiments. We show that nuclear masses, RSFs and measurements of NS radii and tidal deformabilities constrain different density ranges of the EOS, providing complementary probes.
description: 7 pages, 3 figures submitted to PRL
Enabling the Multi-User Generalized Degrees of Freedom in the Gaussian Cellular Channel
Creators: name: Fritschek, Rick
name: Wunder, Gerhard
Publisher: name: arXiv
Year: 2014
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: There has been major progress over the last decade in understanding the classical interference channel (IC). Recent key results show that constant bit gap capacity results can be obtained from linear deterministic models (LDMs). However, it is widely unrecognized that the time-invariant, frequency-flat cellular channel, which contains the IC as a special case, possesses some additional generalized degrees of freedom (GDoF) due to multi-user operation. This was proved for the LDM cellular channel very recently but is an open question for the corresponding Gaussian counterpart. In this paper, we close this gap and provide an achievable sum-rate for the Gaussian cellular channel which is within a constant bit gap of the LDM sum capacity. We show that the additional GDoFs from the LDM cellular channel carry over. This is enabled by signal scale alignment. In particular, the multi-user gain reduces the interference by half in the 2-user per cell case compared to the IC.
description: 5 pages, to appear in IEEE ITW 2014, Hobart, Australia
Playsound Agora
Creators: name: Stolfi, Ariane
Publisher: name: Zenodo
Year: 2020

description: Playsound.space is a tool that was developed in 2018 for the practice of free improvisation. At UBIMUS 2018 we present a piece where we use the system to create a soundscape from Oswald de Andrade's anthropophagic manifesto. This time, we propose a participatory performance, where the audience can, through the chat interface offered by the system, propose search terms for the performer. When communicating during the performance by chat, each word typed becomes a link to search the system. The performer who will be connected to the central sound system will choose words from those typed by the audience to create a soundscape in real time.
Efficient expectation propagation for posterior approximation in high-dimensional probit models
Creators: name: Fasano, Augusto
name: Anceschi, Niccolò
name: Franzolini, Beatrice
name: Rebaudo, Giovanni
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation (stat.CO)
subject: Methodology (stat.ME)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Bayesian binary regression is a prosperous area of research due to the computational challenges encountered by currently available methods either for high-dimensional settings or large datasets, or both. In the present work, we focus on the expectation propagation (EP) approximation of the posterior distribution in Bayesian probit regression under a multivariate Gaussian prior distribution. Adapting more general derivations in Anceschi et al. (2023), we show how to leverage results on the extended multivariate skew-normal distribution to derive an efficient implementation of the EP routine having a per-iteration cost that scales linearly in the number of covariates. This makes EP computationally feasible also in challenging high-dimensional settings, as shown in a detailed simulation study.
Holographic imaginary potential of a quark antiquark pair in the presence of gluon condensation
Creators: name: Tahery, Sara
name: Chen, Xurong
name: Zhang, Zi-qiang
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: For a moving heavy quark antiquark ($Q\bar{Q}$) in a quark gluon plasma (QGP), we use gauge/gravity duality to study both real and imaginary parts of the potential (Re$V_{Q\bar{Q}}$ and Im$V_{Q\bar{Q}}$ respectively) in a gluon condensate (GC) theory. The complex potential is derived from the Wilson loop by considering the thermal fluctuations of the worldsheet of the Nambu-Goto holographic string. We calculate Re$V_{Q\bar{Q}}$ and Im$V_{Q\bar{Q}}$ in both cases where the axis of the moving $Q\bar{Q}$ pair is transverse and parallel with respect to its direction of movement in the plasma. Using the renormalization scheme for the Re$V_{Q\bar{Q}}$ , we find that the inclusion of GC increases the dissociation length while rapidity has the opposite effect. While for the Im$V_{Q\bar{Q}}$ , we observe that by considering the effect of GC, the Im$V_{Q\bar{Q}}$ is generated for larger distance thus decreasing quarkonium dissociation, while rapidity has opposite effect. In particular, as the value of GC decreases in the deconfined phase, the Im$V_{Q\bar{Q}}$ is generated for smaller distance thus enhancing quarkonium dissociation, and at high temperatures it is nearly not modified by GC, consistent with previous findings of the entropic force.
description: 21 pages, 10 figures, references are added
Fluctuating Fractionalized Spins in Quasi Two-dimensional Magnetic V0.85PS3
Creators: name: Kumar, Vivek
name: Kumar, Deepu
name: Singh, Birender
name: Shemerliuk, Yuliia
name: Behnami, Mahdi
name: Buchner, Bernd
name: Aswartham, Saicharan
name: Kumar, Pradeep
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Quantum spin liquid (QSL), a state characterized by exotic low energy fractionalized excitations and statistics is still elusive experimentally and may be gauged via indirect experimental signatures. Remnant of QSL phase may reflect in the spin dynamics as well as quanta of lattice vibrations, i.e., phonons, via the strong coupling of phonons with the underlying fractionalized excitations i.e., Majorana fermions. Inelastic light scattering (Raman) studies on V1-xPS3 single crystals evidences the spin fractionalization into Majorana fermions deep into the paramagnetic phase reflected in the emergence of a low frequency quasielastic response along with a broad magnetic continuum marked by a crossover temperature T* ~ 200 K from a pure paramagnetic state to fractionalized spins regime qualitatively gauged via dynamic Raman susceptibility. We further evidenced anomalies in the phonons self-energy parameters in particular phonon line broadening and line asymmetry evolution at this crossover temperature, attributed to the decaying of phonons into itinerant Majorana fermions. This anomalous scattering response is thus indicative of fluctuating fractionalized spins suggesting a phase proximate to the quantum spin liquid state in this quasi two-dimensional (2D) magnetic system.
How to deal with expanding spectrum of telecommunication networks threatening VLBI?
Creators: name: Tornatore, Vincenza
name: Bautista-Durán, Marta
name: Ferreira, João Salmin
name: García, Susana
name: Hase, Hayo
name: Kallunki, Juha
name: Lindqvist, Michael
name: López-Pérez, José Antonio
name: Madkour, Waleed
name: McKay, Derek
name: Probst, Willi
name: Tangen, Leif Morten
Publisher: name: Zenodo
Year: 2023

description: New plans from telecommunication enterprises foresee the demand of wide sub-band allocations in the range of 1-100 GHz during the upcoming World Radio Conferences, which go beyond of the known expansion of spectrum use by 5G and large satellite constellations (starlink, OneWeb).
More than 50,000 satellites have been planned to be launched in the next decade by telecommunications industry to provide global connectivity, but satellite downlink signals can affect VGOS receivers. Furthermore there are indications that recent agreements among national administrations and satellite companies to coordinate protection zones around radio telescopes and VGOS stations, avoiding downlink satellite transmissions, have been rejected.
Installation of normal cell-phone base stations on communication satellites is also under discussion to connect normal smartphones to satellites to provide global connectivity. Concerning the conducted power levels of cell-phone base stations would have an impact on any radio astronomy observation. CRAF studies show that coordination zones of up to 100km radius would be required to continue with undisturbed VLBI observations. This demonstrates that the future of VLBI is at risk, if no actions are taken to protect VLBI-sites.
Another troubling clue comes from the contention of a big part (6425-7125 MHz) of the so called mid-band by international mobile telecommunication (IMT), 5G and RLAN (Wi-Fi) services in many European Countries. This would degrade sensitivity and accuracy of VGOS measurements in this band. In addition RA community is going to loose the long observed Methanol spectral line at 6650-6675.2 MHz, despite this line is protected by ITU-R Footnote 5.149. National licensing processes are necessary to protect radio astronomy facilities in this band.
Important achievements in increasing sensibility of scientific communities on the importance of geodetic VLBI and VGOS activities have been reached, but still urgent initiatives and strategies are necessary to gain proper protection of VGOS bands before they will be fully crowded by signal of telecommunications services. The situation raises the question what should be done?
Towards Natural Inflation in String Theory
Creators: name: Ben-Dayan, Ido
name: Pedro, Francisco G.
name: Westphal, Alexander
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We provide type IIB string embeddings of two axion variants of natural inflation. We use a combination of RR 2 form axions as the inflaton field and have its potential generated by non perturbative effects in the superpotential. Besides giving rise to inflation, the models developed take into account the stabilization of the compact space, both in the KKLT and large volume scenario regimes, an essential condition for any semi-realistic model of string inflation.
description: LaTeX, 1+26 pages, 2 figures; v2: added refs; v3: corrected a LaTeX problem, where v2 refs were compiled with v1 tex file
Positive psychology and romantic scientism: Reply to comments on Brown, Sokal, & Friedman (2013)
Creators: name: Brown, Nicholas J. L.
name: Sokal, Alan D.
name: Friedman, Harris L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences
subject: 91E99

description: This is a response to five comments [American Psychologist 69, 626-629 and 632-635 (2014)] on our article arXiv:1307.7006.
description: PDF, 9 pages
The Differential Assembly History of the Centers and Outskirts of Main Sequence Galaxies at $z\sim2.3$
Creators: name: Cutler, Sam E.
name: Giavalisco, Mauro
name: Ji, Zhiyuan
name: Cheng, Yingjie
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a study of spatially-resolved star formation histories (SFHs) for 60 $z\sim2.3$ main-sequence, star-forming galaxies selected from the MOSDEF spectroscopic survey in the GOODS-N field, with median stellar mass $\log(M_\star/M_\odot)=9.75$ and spanning the range $8.6<\log(M_\star/M_\odot)<11.5$. Photometry is decomposed into a central and outer spatial component using observed $z_\mathrm{F850LP}-H_\mathrm{F160W}$ colors. The Prospector code is used to model spectral energy distributions for the center, outskirt, and integrated galaxy using HST/ACS and WFC3, Spitzer/IRAC, and ground-based photometry, with additional constraints on gas-phase metallicity and spectroscopic redshift from MOSDEF spectroscopy. For the low-resolution bands, spatially-resolved photometry is determined with an iterative approach. The reconstructed SFHs indicate that the majority of galaxies with $\log(M_\star/M_\odot)<10.5$ are observed while their central regions undergo relatively recent ($<100$ Myr) bursts of star formation, while the outskirts have a smooth, quasi-steady SFH that gently increases towards the redshift of observation. The enhanced star formation activity of the central parts is broadly consistent with the idea that it is produced by highly dissipative gas compaction and accretion. The wide range of central densities and sizes observed in the sample suggests that for the selected galaxies such a process has started but is still far from being completed. The implication would be that selecting star-forming galaxies at cosmic noon frequently includes systems in an "evolved" evolutionary phase where the centers have recently started a burst of star formation activity that will likely initiate inside-out quenching in the next several hundred million years.
description: 28 pages, 21 figures. Accepted for publication in ApJ
Global existence and optimal decay rates for the Timoshenko system: the case of equal wave speeds
Creators: name: Mori, Naofumi
name: Xu, Jiang
name: Kawashima, Shuichi
Publisher: name: arXiv
Year: 2014
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35L45, 35B40, 74F05

description: This work first gives the global existence and optimal decay rates of solutions to the classical Timoshenko system on the framework of Besov spaces. Due to the \textit{non-symmetric} dissipation, the general theory for dissipative hyperbolic systems ([30]) can not be applied to the Timoshenko system directly. In the case of equal wave speeds, we construct global solutions to the Cauchy problem pertaining to data in the spatially Besov spaces. Furthermore, the dissipative structure enables us to give a new decay framework which pays less attention on the traditional spectral analysis. Consequently, the optimal decay estimates of solution and its derivatives of fractional order are shown by time-weighted energy approaches in terms of low-frequency and high-frequency decompositions. As a by-product, the usual decay estimate of $L^{1}(\mathbb{R})$-$L^{2}(\mathbb{R})$ type is also shown.
description: 29 pages
High-temperature self-energy corrections to x-ray absorption spectra
Creators: name: Tan, Tun S.
name: Kas, J. J.
name: Trickey, S. B.
name: Rehr, J. J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Effects of finite-temperature quasiparticle self-energy corrections to x-ray absorption spectra are investigated within the finite-temperature quasiparticle local density GW approximation up to temperatures $T$ of order the Fermi temperature. To facilitate the calculations, we parametrize the quasiparticle self-energy using low-order polynomial fits. We show that temperature-driven decrease in the electron lifetime substantially broadens the spectra in the near-edge region with increasing $T$. However, the quasiparticle shift is most strongly modified near the onset of plasmon excitations.
Equivalence between Time Series Predictability and Bayes Error Rate
Creators: name: Xu, En
name: Zhou, Tao
name: Yu, Zhiwen
name: Sun, Zhuo
name: Guo, Bin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Theory (cs.IT)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Predictability is an emerging metric that quantifies the highest possible prediction accuracy for a given time series, being widely utilized in assessing known prediction algorithms and characterizing intrinsic regularities in human behaviors. Lately, increasing criticisms aim at the inaccuracy of the estimated predictability, caused by the original entropy-based method. In this brief report, we strictly prove that the time series predictability is equivalent to a seemingly unrelated metric called Bayes error rate that explores the lowest error rate unavoidable in classification. This proof bridges two independently developed fields, and thus each can immediately benefit from the other. For example, based on three theoretical models with known and controllable upper bounds of prediction accuracy, we show that the estimation based on Bayes error rate can largely solve the inaccuracy problem of predictability.
description: 1 Figure, 1 Table, 5 Pages
Robust Scaling of Strength and Elastic Constants and Universal Cooperativity in Disordered Colloidal Micropillars
Creators: name: Strickland, Daniel J.
name: Huang, Yun-Ru
name: Lee, Daeyeon
name: Gianola, Daniel S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study the uniaxial compressive behavior of disordered colloidal free-standing micropillars composed of a bidisperse mixture of 3 and 6 um polystyrene particles. Mechanical annealing of confined pillars enables variation of the packing fraction across the phase space of colloidal glasses. The measured normalized strengths and elastic moduli of the annealed freestanding micropillars span almost three orders-of-magnitude despite similar plastic morphology governed by shear banding. We measure a robust correlation between ultimate strengths and elastic constants that is invariant to relative humidity, implying a critical strain of $\sim$0.01 that is strikingly similar to that observed in metallic glasses (MGs) [W.L. Johnson, K. Samwer, Phys. Rev. Lett. 95, 195501, 2005] and suggestive of a universal mode of cooperative plastic deformation. We estimate the characteristic strain of the underlying cooperative plastic event by considering the energy necessary to create an Eshelby-like ellipsoidal inclusion in an elastic matrix. We find that the characteristic strain is similar to that found in experiments and simulations of other disordered solids with distinct bonding and particle sizes, suggesting a universal criterion for the elastic to plastic transition in glassy materials with the capacity for finite plastic flow.
description: 7 pages, 3 figures
Self-propelling colloidal finite state machines
Creators: name: van Kesteren, Steven
name: Alvarez, Laura
name: Arrese-Igor, Silvia
name: Alegria, Angel
name: Isa, Lucio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Endowing materials with physical intelligence holds the key for a progress leap in robotic systems. In spite of the growing success for macroscopic devices, transferring these concepts to the microscale presents several challenges connected to the lack of suitable fabrication and design techniques, and of internal response schemes that connect the materials' properties to the function of an autonomous unit. Here, we realize self-propelling colloidal clusters which behave as simple finite state machines, i.e. systems built to possess a finite number of internal states connected by reversible transitions and associated to distinct functions. We produce these units via capillary assembly combining hard polystyrene colloids with two different types of thermo-responsive microgels. The clusters, actuated by spatially uniform AC electric fields, adapt their shape and dielectric properties, and consequently their propulsion, via reversible temperature-induced transitions controlled by light. The different transition temperatures for the two microgels enable three distinct dynamical states corresponding to three illumination intensity levels. The sequential reconfiguration of the microgels affects the velocity and shape of the active trajectories according to a pathway defined by tailoring the clusters' geometry during assembly. The demonstration of these simple systems indicates an exciting route to build more complex units with broader reconfiguration schemes and multiple responses towards the realization of autonomous systems with physical intelligence at the colloidal scale.
The Development of a Program to Enhance the Ethical Leadership Qualities of Teachers under the Supervision of the Secondary Educational Service Area Office Khon Kaen
Creators: name: Rachai Namwongsa
Publisher: name: DR.KEN Institute of Academic Development and Promotion.
Year: 2023
Subjects: Development of a Program
Enhancing Program
Ethical Leadership Qualities

description: Interdisciplinary Academic and Research Journal, 3, 4, 271-290
Measurement of the branching fraction and search for $CP$ violation in $D^0\rightarrow K^0_S\,K^0_S\,π^+π^-$ decays at Belle
Creators: name: Sangal, Aman
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We measure the branching fraction for the Singly Cabibbo-suppressed decay $D^0\rightarrow K^0_S\,K^0_S\,π^+π^-$, and we search for $CP$ violation via a measurement of the $CP$ asymmetry $A^{}_{CP}$ and also the $T$-odd triple-product asymmetry $a_{CP}^{T}$. The later two measurements are complementary. We use 922~fb$^{-1}$ of data recorded by the Belle experiment, which ran at the KEKB asymmetric-energy $e^+ e^-$ collider. The branching fraction is measured relative to the Cabibbo-favored normalization channel $D^0\rightarrow K^0_S\,π^+π^-$. Singly Cabibbo-suppressed charm decays are expected to have especially good sensitivity to new physics effects.
description: Proceeding for FPCP 2022 conference talk