Article
Astronomy & Astrophysics
Obinna Umeh
Summary: This study addresses the challenges of computational estimation and high-dimensionality when using the anisotropic three-point correlation function for cosmological parameter inference. By utilizing multipole decompositions to reduce dimensionality, the full expression for the multipole moments and covariance matrix of the anisotropic 3PCF can be derived effectively. Optimal computation of multipole moments and their covariance is demonstrated using the 2D FFTLog formalism, involving integrals over product terms with bispectrum, power spectra, and spherical Bessel functions.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Angelica P. Orlova, Maxwell S. Varley, Maximilian G. Bernbeck, Kyle M. Kirkpatrick, Philip C. Bunting, Milan Gembicky, Jeffrey D. Rinehart
Summary: We investigated the border between single-molecule and solid-state magnetism through a study of erbium-based magnetic compounds. We observed a significant decrease in magnetic relaxation rates due to differences in crystal packing, and discovered the role of nonzero-dimensional interactions in predominantly zero-dimensional magnetic materials. This opens up new possibilities for research on molecular magnetic materials.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Mathematics, Applied
Inga Kottlarz, Ulrich Parlitz
Summary: The ordinal pattern-based complexity-entropy plane is a popular tool for distinguishing stochastic signals from deterministic chaos. However, its performance has been mainly demonstrated for low-dimensional systems. To evaluate its usefulness for high-dimensional chaotic data, we applied this method to various types of time series. We found that both high-dimensional deterministic data and stochastic surrogate data can occupy the same region on the complexity-entropy plane, making classification challenging. Surrogate data tests based on entropy and complexity provide more significant results.
Article
Chemistry, Physical
Mert Tas, Gulsah Elden
Summary: The effects of cell temperature and relative humidity on charge transport parameters are analyzed numerically in this study. The results show that the current densities increase with increasing temperature and humidity, reaching a maximum in the rib regions. The behaviors of electrolyte potentials are similar to the changes in temperature and humidity. The cathode electrical potentials do not change significantly with increasing temperature and humidity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Mechanical
Hooman Eslami, Laddu Bhagya Jayasinghe, Daniele Waldmann
Summary: This study proposes a constitutive material model for simulating the nonlinear mechanical response of timber under a three-dimensional stress state, implementing the model as a user material subroutine UMAT in ABAQUS. The results show a good agreement between numerical simulations and experimental data, suggesting that the proposed model can be further used in numerical simulations of timber's anisotropic behavior.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Polymer Science
Yuri Boiko, Vyacheslav Marikhin, Lyubov' Myasnikova
Summary: This research investigates the suitability of different statistical approaches (Weibull's and Gaussian distribution) for describing the statistical distributions of mechanical properties in high-performance polymer materials. In addition to the routine mechanical properties, the study also considers the apparent viscoelastic modulus and apparent strain at break derived from the stress-strain curves. The results show that both the chain architecture and sample type affect the scatter of data, with the Weibull's model proving to be more accurate compared to the Gaussian model.
Article
Chemistry, Physical
David A. King, Masao Doi, Erika Eiser
Summary: The study reveals significant differences in the elastic response to a step strain between rigid wire frame particles and rods, with wire frames exhibiting specific scaling behavior in linear elasticity and a transition in non-linear response at a critical density. The ability of wire frames to bend due to entanglements with surroundings plays a crucial role in this difference, even at small strains, with most particles being bent above a critical strain.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Physics, Fluids & Plasmas
P. M. Pasinetti, A. J. Ramirez-Pastor, E. E. Vogel
Summary: By combining Monte Carlo simulations and thermodynamic integration method, this study investigates the configurational entropy of straight rigid rods adsorbed on three-dimensional lattices. Different phase diagrams are obtained based on the lengths of the rods. The results provide numerical validation of a recent analytical prediction and support the superuniversality of entropy behavior on hypercubical lattices.
Article
Materials Science, Multidisciplinary
F. Sgrignuoli, S. Torquato, L. Dal Negro
Summary: The purpose of this study is to explore the fundamental connection between structural correlations and light localization in three-dimensional open scattering systems. By numerically investigating the transport of vector electromagnetic waves scattered by resonant electric dipoles spatially arranged in 3D stealthy hyperuniform disordered point patterns, we demonstrate the fine control of exotic states of amorphous matter and the systematic design of optical media with tunable properties. We establish a transport phase diagram that shows a transition from diffusive to weak localization regime, characterized by the Thouless number and the spectral statistics of the scattering resonances. By tuning the parameter chi, we achieve large spectral gaps and suppressed subradiant proximity resonances, facilitating light localization. Moreover, our study reveals a transparent region of the transport phase diagram. This work provides a systematic description of light transport and weak localization in stealthy hyperuniform structures, and motivates the engineering of photonic systems for enhanced light-matter interactions.
Article
Automation & Control Systems
Subha Maity, Yuekai Sun, Moulinath Banerjee
Summary: This paper discusses the task of meta-analysis in high-dimensional settings with similar but non-identical data sources. A global parameter is introduced to borrow strength across heterogeneous datasets, emphasizing interpretability and statistical efficiency in the presence of heterogeneity. A one-shot estimator of the global parameter is also proposed, which preserves data source anonymity and converges based on the size of the combined dataset. The paper demonstrates the superior performance of the identification restrictions in adapting to known data distribution and predicting for new/unseen data distribution in high-dimensional linear model settings. The benefits of the approach are further demonstrated on a large-scale drug treatment dataset involving different cancer cell-lines.
JOURNAL OF MACHINE LEARNING RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Takamichi Terao
Summary: In this study, the level statistics of the three-dimensional tight-binding model with non-Hermitian disorder and its variants were analyzed using the shift-and-invert Arnoldi method on a larger lattice than previous studies. The results showed larger critical disorder magnitudes in the isotropic TME model compared to smaller systems, and also investigated the localization-delocalization transition in an anisotropic model. The computational method used was effective for large-scale analysis of sparse non-Hermitian matrices.
Article
Engineering, Electrical & Electronic
Orestis Koutsos, Francesco Foglia Manzillo, Antonio Clemente, Ronan Sauleau
Summary: A novel approach for studying and designing low-cost anisotropic transmitarrays (TAs) at sub-THz frequencies is presented. The array consists of three metal layers and two interleaved dielectric spacers, and a four-port equivalent circuit model is derived to accurately model the anisotropic behavior of the unit cell (UC). The results demonstrate the effectiveness of the design methodology even under strict technological constraints.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Physics, Nuclear
Zichao Yang, Emanuele Mereghetti, Lucas Platter, Matthias R. Schindler, Jared Vanasse
Summary: The electric dipole moments (EDMs) of three-nucleon systems are calculated in pionless effective field theory. Both one-body contributions from permanent proton and neutron EDMs and two-body contributions from charge-parity-odd nucleon-nucleon interactions are considered. The momentum dependence of the electric dipole form factor in the Wigner limit is found to be similar to the charge form factor, indicating proper renormalization.
Article
Construction & Building Technology
Xiaoming Zhao, Shiyu Shang, Yuanlin Yang, Mingming Hu
Summary: The soil hydraulic conductivity of an embankment exhibits strong spatial variability, which can be characterized by the coefficient of variation and fluctuation scale. The characteristics of the three-dimensional stochastic seepage field in an embankment vary under different COVs and fluctuation scales, showing different trends in mean total head and standard deviation with anisotropy ratio. The study highlights the importance of considering randomness in hydraulic conductivity for accurate analysis of seepage behavior in embankments.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Physics, Fluids & Plasmas
Kazuhiro Inagaki, Hiromichi Kobayashi
Summary: This study discusses the necessity of anisotropic subgrid-scale stress in large eddy simulations of turbulent shear flows using a coarse grid resolution. The findings show that the anisotropic SGS stress has a negligible contribution to energy transfer, but has a large and non-dissipative contribution to the streamwise and spanwise components of grid-scale Reynolds stress when the filter size is large.
PHYSICAL REVIEW FLUIDS
(2023)
Review
Physics, Multidisciplinary
Zohreh Davoudi, William Detmold, Phiala Shanahan, Kostas Orginos, Assumpta Parreno, Martin J. Savage, Michael L. Wagman
Summary: In the past decade, numerical solutions of Quantum Chromodynamics (QCD) using lattice QCD techniques have advanced to the point of connecting fundamental aspects of nuclear physics with the underlying degrees of freedom of the Standard Model. Lattice QCD calculations of nuclear matrix elements offer guidance for low energy nuclear reactions in astrophysics, dark matter direct detection experiments, and experimental searches for violations of the symmetries of the Standard Model.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2021)
Review
Physics, Nuclear
Paulo Bedaque, Amber Boehnlein, Mario Cromaz, Markus Diefenthaler, Latifa Elouadrhiri, Tanja Horn, Michelle Kuchera, David Lawrence, Dean Lee, Steven Lidia, Robert McKeown, Wally Melnitchouk, Witold Nazarewicz, Kostas Orginos, Yves Roblin, Michael Scott Smith, Malachi Schram, Xin-Nian Wang
Summary: This report summarizes the outcomes of the workshop "AI for Nuclear Physics" held at Thomas Jefferson National Accelerator Facility on March 4-6, 2020.
EUROPEAN PHYSICAL JOURNAL A
(2021)
Article
Physics, Multidisciplinary
Silas R. Beane, Roland C. Farrell
Summary: This paper investigates the scattering matrix that describes the low-energy, non-relativistic scattering of spin-1/2 fermions interacting via finite-range potentials. The constraints on scattering trajectories and the effect of spatial dimensionality are explored using a geometric action principle.
Article
Physics, Multidisciplinary
Silas R. Beane, Roland C. Farrell
Summary: This study discovers UV/IR symmetries in the s-wave nucleon-nucleon scattering matrix, which provide an interpretation for phase shift features. The findings are significant for pionless EFT expansions and offer insights into novel expansion methods.
Article
Physics, Nuclear
Silas R. Beane, Roland C. Farrell
Summary: The low energy S-matrix, which describes non-relativistic scattering due to finite-range forces, possesses UV/IR symmetries that are hidden in the corresponding effective field theory (EFT) action. This study demonstrates that the S-matrix symmetries manifest as geometric symmetries of the RG flow of coupling constants in both three and two spatial dimensions in the EFT action. An example is provided to illustrate that UV/IR symmetry breaking in the S-matrix imposes strong constraints on the RG flow of the coefficients of the symmetry-breaking operators in the EFT.
Article
Astronomy & Astrophysics
Saman Amarasinghe, Riyadh Baghdadi, Zohreh Davoudi, William Detmold, Marc Illa, Assumpta Parreno, Andrew V. Pochinsky, Phiala E. Shanahan, Michael L. Wagman
Summary: The low-energy spectrum and scattering of two-nucleon systems have been investigated using lattice quantum chromodynamics and a variational approach. Various types of interpolating operators, including dibaryon operators, hexaquark operators, and quasilocal operators, were utilized. By employing sparsening techniques, correlation function matrices were formed from the quark propagators obtained from the operators. Variational methods were applied to constrain the low-energy spectra of two-nucleon systems in a finite volume. The study reveals the dependence of energy spectra on interpolating operators and highlights the strengths and weaknesses of variational methods.
Article
Optics
Silas R. Beane, Gianluca Bertaina, Roland C. Farrell, William R. Marshall
Summary: We study the ultracold and weakly coupled Fermi gas in two spatial dimensions using an effective field theory framework. It is found that the universal corrections to the energy density at two orders of interaction strength do not agree with Monte Carlo simulations in the weak-coupling regime. We obtain universal corrections to three orders of interaction strength, which provide agreement between theory and simulation. We also consider the scale ambiguity associated with the renormalization of singular contact interactions, and calculate nonuniversal contributions to the energy density.
Article
Computer Science, Interdisciplinary Applications
Travis Whyte, Andreas Stathopoulos, Eloy Romero, Kostas Orginos
Summary: The calculation of disconnected diagram contributions in Lattice QCD is computationally expensive. This article presents a sampling and interpolation scheme that can predict the variances associated with Frequency Splitting under displacements of the lattice, and selects shifts that minimize the cost for trace estimation.
COMPUTER PHYSICS COMMUNICATIONS
(2024)
Article
Astronomy & Astrophysics
P. C. Barry, C. Egerer, J. Karpie, W. Melnitchouk, C. Monahan, K. Orginos, D. Richards, Jian-Wei Qiu, N. Sato, R. S. Sufian, S. Zafeiropoulos
Summary: In this study, pion parton distribution functions were extracted through a Monte Carlo global QCD analysis of experimental data and lattice QCD data. The reduced Ioffe time pseudo-distributions significantly decreased the uncertainties on the PDFs, while the current-current correlators were limited by systematic effects associated with the lattice.
Article
Astronomy & Astrophysics
William Detmold, Anthony Grebe, Issaku Kanamori, C-J David Lin, Santanu Mondal, Robert J. Perry, Yong Zhao
Summary: In this article, the heavy-quark operator product expansion method is numerically implemented for the first time to determine the second Mellin moment of the pion LCDA. The resulting value, obtained at a pion mass of 550 MeV and a factorization scale of 2 GeV in quenched QCD, is 0.210 +/- 0.013(stat) +/- 0.034(sys), which is compatible with previous determinations of this quantity.
Article
Astronomy & Astrophysics
William Detmold, Anthony Grebe, Issaku Kanamori, C-J David Lin, Robert J. Perry, Yong Zhao
Summary: This paper presents theoretical details for calculating PDFs and LCDAs using a heavy-quark operator product expansion method, showing that the operator product expansion can be expressed as the convolution of a perturbative matching kernel and the corresponding light cone distribution. It also provides the one-loop Wilson coefficients for the PDFs and LCDAs, with the coefficients for the LCDAs being new.
Article
Astronomy & Astrophysics
Marc Illa, Silas R. Beane, Emmanuel Chang, Zohreh Davoudi, William Detmold, David J. Murphy, Kostas Orginos, Assumpta Parreno, Martin J. Savage, Phiala E. Shanahan, Michael L. Wagman, Frank Winter
Summary: In this study, interactions between two octet baryons at low energies were investigated using LQCD with larger-than-physical quark masses. The results showed that most systems were bound at this pion mass, except for the repulsive interactions in the spin-triplet Sigma N and Xi Xi channels. Extrapolation of binding energies to the physical point was performed, and constraints on low-energy coefficients in pionless EFT relevant for two-baryon interactions were determined.
