Article
Chemistry, Physical
Sameer Khadatkar, Phani Motamarri
Summary: Quantum mechanical calculations using DFT for material modeling involve solving a nonlinear eigenvalue problem. This study explores the potential of polynomial expansion approaches as an alternative to reduce computational cost. A detailed comparison of different approaches on different architectures is performed to assess their relative performance in terms of accuracy, efficiency, scaling behavior, and energy efficiency.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Computer Science, Interdisciplinary Applications
Anton G. Artemov, Emanuel H. Rubensson
Summary: The proposed method utilizes acceleration technique and submatrix product screening to reduce computational cost, with a selected threshold value for error control.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Physics, Multidisciplinary
S. Koehnke, E. Agudelo, M. Schuenemann, O. Schlettwein, W. Vogel, J. Sperling, B. Hage
Summary: A form of quantum correlation is experimentally demonstrated to exist even in the absence of entanglement and discord, certified through negativities in the regularized two-mode Glauber-Sudarshan function. The quantumness of this state is shown to be robust against dephasing, requiring fewer experimental resources for stability and capable of activating multimode entanglement. This research implements a robust kind of nonclassical photon-photon correlated state with potential applications in quantum information processing.
PHYSICAL REVIEW LETTERS
(2021)
Article
Engineering, Manufacturing
Richard M. Christensen
Summary: This study examines the difficulties and complications arising from matrix damage in fiber composites and develops a simplified lamination theory to address some of these issues. The theory is applicable to carbon fiber dominated polymeric composites with high stiffness and high strength, and the resulting lamination forms are rigorous for the fiber dominated condition. The study shows that anisotropic states greater than about 4:1 are likely to be more sensitive to the complications of matrix damage compared to lower anisotropy ratios.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Physics, Multidisciplinary
Jack S. Baker, David R. Bowler
Summary: By engraving trenches on the surfaces of ultrathin ferroelectric films, control over the orientation of FE domain walls can be achieved, allowing them to function as useful nanocircuits. Through large scale density functional theory simulations, the mechanism responsible for parallel alignment of domain walls and surface trenches has been explored, showing how it can be explained by the arrangement of electric dipole moments.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Guangze Chen, Fei Song, Jose L. Lado
Summary: The computation of spectral functions in a non-Hermitian many-body system is a challenging task, but this article proposes a numerical approach to address this problem. By utilizing the kernel polynomial method and the matrix-product state formalism, the local spectral functions of a non-Hermitian many-body Hamiltonian can be efficiently computed. The results demonstrate that the algorithm accurately captures the topological spin excitations and line gap topology in non-Hermitian spin models, even in the presence of the non-Hermitian skin effect.
PHYSICAL REVIEW LETTERS
(2023)
Article
Computer Science, Artificial Intelligence
Birgit Hillebrecht, Benjamin Unger
Summary: The article presents a rigorous upper bound on the prediction error of physics-informed neural networks (PINNs). This bound can be calculated without knowing the true solution and only requires prior knowledge about the characteristics of the underlying dynamical system. The authors exemplify the application of this posteriori error bound to four different problems.
IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS
(2023)
Article
Geochemistry & Geophysics
Shuai Liu, Kai Tan, Pengjie Tao, Jianru Yang, Weiguo Zhang, Yanjun Wang
Summary: Terrestrial laser scanning (TLS) is capable of acquiring high-precision and high-resolution 3-D point clouds, but accurately and efficiently processing the massive unorganized point clouds is a common technical challenge. Density, derived for each point by counting the number of neighbors, plays an important role in TLS data processing. However, density usually varies remarkably in different scenes due to various factors, hindering its capability in reflecting geometric discrepancies. In this study, a rigorous model is proposed to correct the density of single-scan TLS point clouds based on the mathematically deduced relation between density and influencing factors.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2023)
Article
Chemistry, Multidisciplinary
Hoang-Lam Pham, Thomas Alcaire, Sebastien Soulan, Delphine Le Cunff, Jean-Herve Tortai
Summary: Mueller matrix ellipsometry (MME) is a powerful tool for nanomanufacturing. In this study, a rigorous coupled-wave analysis (RCWA) method was proposed to efficiently simulate the optical responses of multilayer nanostructures. By computing the local scattering matrices and integrating them into the global matrix, the corresponding Mueller matrix can be simulated quickly. The results demonstrate significant numerical improvements, highlighting the effectiveness of the RCWA method in metrological studies of multilayer nanodevices.
Article
Physics, Multidisciplinary
Alec Eickbusch, Volodymyr Sivak, Andy Z. Ding, Salvatore S. Elder, Shantanu R. Jha, Jayameenakshi Venkatraman, Baptiste Royer, S. M. Girvin, Robert J. Schoelkopf, Michel H. Devoret
Summary: This study demonstrates the universal control of a quantum system where the rate of bare nonlinear interaction is comparable to the fastest rate of decoherence. By introducing a noise-resilient protocol that takes advantage of an in situ enhanced nonlinearity instead of harnessing a bare nonlinearity, the researchers achieved the fast universal control and state preparation of the engineered quantum systems.
Article
Automation & Control Systems
Yanhui Liu, Jun Fu
Summary: This article proposes a new method to convert intractable probabilistic path constraints into computationally solvable and equivalent deterministic constraints, and designs a dynamic event-triggered stochastic model predictive control (DETSMPC) algorithm to ensure rigorous satisfaction of the probabilistic path constraints over the entire time domain. Additionally, a novel event-triggering sampling scheme is proposed to reduce computation consumption. Numerical examples demonstrate the effectiveness of the proposed methods.
IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS
(2023)
Article
Mathematics, Applied
B. J. Civiletti, A. Lakhtakia, P. B. Monk
Summary: We developed a hybrid coordinate-transform method by combining the rigorous coupled-wave approach (RCWA) with transformation optics to solve the time-harmonic Maxwell equations in a 2D domain containing a surface-relief grating. Through the study of scattering problems, we proved the convergence of this method for the p-polarization state and obtained estimates for the convergence rates. Numerical testing showed faster convergence than predicted and the hybrid method avoided the Gibbs phenomenon associated with the standard RCWA.
JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS
(2022)
Article
Computer Science, Interdisciplinary Applications
Jorgen E. Midtbo, Fabio Zeiser, Erlend Lima, Ann-Cecilie Larsen, Gry M. Tveten, Magne Guttormsen, Frank Leonel Bello Garrote, Anders Kvellestad, Therese Renstrom
Summary: The paper presents a new software implementation of the Oslo method, OMpy, which includes theoretical basis, essential equations, and new functionalities like propagating uncertainties using Monte Carlo approach. The software simultaneously normalizes level density and gamma-ray strength function, preserving all correlations, and is validated by analyzing a synthetic spectrum.
COMPUTER PHYSICS COMMUNICATIONS
(2021)
Article
Surgery
Katherine M. Marsh, Florence E. Turrentine, Worthington G. Schenk, John B. Hanks, Bruce D. Schirmer, John P. Davis, Timothy L. McMurry, Sarah J. Ratcliffe, Victor M. Zaydfudim, R. S. Jones
Summary: This study characterized errors in the care of surgical patients and found an association between errors and postoperative morbidity, especially technical errors. The results of the study revealed a strong independent relationship between errors and morbidity.
Article
Psychology, Multidisciplinary
Chris Evans, Jo-anne Carlyle, Clara Paz
Summary: Psychological research often aims to find general rules that apply to everyone, but this conflicts with the examination of individual uniqueness. While there are general statistical regularities in subjective self-report data, which can be used with statistical and psychometric methods, there has been a neglect of individual-specific data. This paper reviews the method of derangements as a way to analyze idiographic data and discusses its potential for research and practice.
FRONTIERS IN PSYCHOLOGY
(2023)
