Article
Materials Science, Multidisciplinary
Youning Gong, Yanyu Zhao, Zhichao Zhou, Delong Li, Hu Mao, Qiaoliang Bao, Yupeng Zhang, Guo Ping Wang
Summary: The recent discovery of in-plane hyperbolic phonon polaritons in biaxial polar crystal-alpha-MoO3 has sparked a surge of research interest in anisotropic photonic quasiparticles in van der Waals materials. This study systematically investigates the anisotropic photo-phonon interactions in alpha-MoO3 using in situ angle-resolved polarized Raman spectroscopy, providing a better understanding of the anisotropic phonon modes in alpha-MoO3 and serving as a valuable reference for other anisotropic van der Waals crystals.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Hanan Herzig Sheinfux, Minwoo Jung, Lorenzo Orsini, Matteo Ceccanti, Aditya Mahalanabish, Daniel Martinez-Cercos, Iacopo Torre, David Barcons Ruiz, Eli Janzen, James H. Edgar, Valerio Pruneri, Gennady Shvets, Frank H. L. Koppens
Summary: This study successfully created nanoscale hypercrystals, and measured the Bloch modes of these crystals directly using scattering near-field microscopy. The dispersion of the Bloch modes was extracted and revealed a clear switch from positive to negative group velocity. The study also observed spectral features specific to hypercrystals, providing important insights into nanoscale light-matter interactions and the manipulation of optical density.
Review
Nanoscience & Nanotechnology
Xuezhi Ma, Nathan Youngblood, Xiaoze Liu, Yan Cheng, Preston Cunha, Kaushik Kudtarkar, Xiaomu Wang, Shoufeng Lan
Summary: This article discusses the method of changing the optical properties of 2D materials by engineering the photonic environment, emphasizing the importance of the interaction between the environment and the materials for efficiency. By modifying dielectric and metallic environments, the light-matter interaction of 2D materials can be effectively shaped.
Article
Physics, Applied
J. -Z. Zhang
Summary: This study systematically investigates the properties of phonon polaritons (PHPs) in multilayers of hexagonal boron nitride, including confinement, group velocity, propagation quality factor (PQF), and wavelength scaling. It is found that the dielectric response of the substrate and the effect of retardation should be considered for an accurate description of the PHP properties. Additionally, the coupling of photons and longitudinal optical phonons leads to a deviation from the linear scaling law near the center frequency.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Optics
Denis Iakushev, Servando Lopez-Aguayo
Summary: We investigate the effect of an external magnetic field with arbitrary direction on the photonic band of a superlattice structure comprising alternating dielectric and magneto-optical plasma layers. By considering the electrodynamical anisotropy of the superlattice in the presence of the magnetic field, we derive the dispersion equations and observe that the photonic spectrum of the superlattice splits into two branches due to the magnetic field. Interestingly, our results show that a previously photo-isolating superlattice can become entirely photo-conducting, regardless of the direction of the applied magnetic field. These findings could be useful for the design and construction of new optical diode-like devices.
Article
Chemistry, Multidisciplinary
P. V. Dolganov, K. D. Baklanova, A. Y. Bobrovsky
Summary: The study reports complex optical investigations of polymer-stabilised cholesteric photonic liquid crystal doped with a dichroic fluorescent dye. A combination of various experimental methods was employed to characterise the properties of the photonic crystal, and the position of the cholesteric band was matched with the emission band of the fluorescent dye. Analytical expressions and numerical calculations were used to interpret the experimental data in this study.
Article
Nanoscience & Nanotechnology
Jeffrey J. Schwartz, Son T. Le, Sergiy Krylyuk, Curt A. Richter, Albert Davydov, Andrea Centrone
Summary: Hyperbolic phonon polaritons (HPhPs) are hybrid excitations of light and coherent lattice vibrations, existing in strongly optically anisotropic media. By studying single-crystalline alpha-MoO3, the dispersion relations and lifetimes of HPhPs can be determined. Measurements show that MoO3 crystals have longer HPhPs propagation lengths and lifetimes in suspended regions, with lower optical compressions.
Article
Chemistry, Multidisciplinary
Qing Zhang, Qingdong Ou, Guangwei Hu, Jingying Liu, Zhigao Dai, Michael S. Fuhrer, Qiaoliang Bao, Cheng-Wei Qiu
Summary: In this study, the issues of limited photon confinement, in-plane hyperbolicity, and unidirectional propagation of bulk SPhPs were collectively addressed by constructing a heterostructural interface between biaxial van der Waals material and bulk polar dielectric. The hybridized SPhPs showed in-plane hyperbolicity with a large confinement factor (>100), and steerable and unidirectional polariton excitation was achieved. This approach provides a generalizable framework for manipulating nanolight flow in hybrid systems consisting of anisotropic materials and polar dielectrics.
Article
Materials Science, Multidisciplinary
Ming Ye, Bo Qiang, Song Zhu, Mingjin Dai, Fakun Wang, Yu Luo, Qian Wang, Qi Jie Wang
Summary: This study reports the first experimental demonstration of far-field excitation and manipulation of hyperbolic phonon resonances in metamaterial structures consisting of alpha-MoO3 nanodisks and slabs. By controlling the incident polarization angle, the resonances along different in-plane crystal directions can be selectively excited.
ADVANCED OPTICAL MATERIALS
(2022)
Review
Optics
Xu Li, Haiyang Liu, Congming Ke, Weiqing Tang, Mengyu Liu, Feihong Huang, Yaping Wu, Zhiming Wu, Junyong Kang
Summary: This review systematically summarizes the crystalline structure, growth dynamics, optical anisotropy, and modulation strategies of anisotropic 2D materials, as well as their photonic applications. The discussion includes the physical properties and crystalline structures of typical anisotropic 2D materials, the growth mechanism of low-symmetry lattices, and the principles of anisotropic optical absorption, photoluminescence, Raman scattering, and photodetection. The review also explores techniques to modify in-plane anisotropy and introduce optical anisotropy to isotropic materials, providing new control over their optical properties and bridging the gap between scientific exploration and practical device development.
LASER & PHOTONICS REVIEWS
(2021)
Article
Nanoscience & Nanotechnology
Jun Wu, Xiuwei Yang, Zhongmin Wang, Biyuan Wu, Xiaohu Wu
Summary: This study investigates tunable multichannel perfect absorption in monolayer graphene at terahertz frequencies achieved by depositing a graphene monolayer on a Fibonacci quasiperiodic multilayer structure. The absorptivity is attributed to the graphene Tamm plasmon polaritons and multiple photonic stopbands of dielectric Fibonacci multilayers. The multichannel operating frequencies can be flexibly tuned through varying the angle of incidence and structure dimensions, and the absorption is not sensitive to the polarization state.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Sergey G. Menabde, Junghoon Jahng, Sergejs Boroviks, Jongtae Ahn, Jacob T. Heiden, Do Kyung Hwang, Eun Sung Lee, N. Asger Mortensen, Min Seok Jang
Summary: Orthorhombic molybdenum trioxide (alpha-MoO3) is a polaritonic van der Waals crystal with strongly anisotropic mid-infrared phonon-polaritons. The coupling of polariton with its mirror image in an adjacent metal leads to a more confined image mode. This research measures the propagation constant of image phonon-polaritons in alpha-MoO3 using monocrystalline gold flakes as a substrate, demonstrating the long lifetime and propagation length of these polaritons.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Y. Trabelsi, N. Ben Ali, Francis Segovia-Chaves, Herbert Vinck Posada
Summary: This paper theoretically investigates the properties and tuning methods of photonic quasicrystals built using hybrid materials, achieving a tunable photonic band gap with resonant peaks. The properties are modulated by superconductor temperature, dielectric layer thickness, and quasi-periodic structure lattice parameters, with discussions on the behavior of photonic band gaps under different conditions.
OPTICAL AND QUANTUM ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Ren Zheng, Lingling Ma, Wei Feng, Jintao Pan, Zeyu Wang, Zhaoxian Chen, Yiheng Zhang, Chaoyi Li, Peng Chen, Hari Krishna Bisoyi, Bingxiang Li, Quan Li, Yanqing Lu
Summary: Advances in biomimicry have led to the rise of advanced robotics, offering promising revolutions in various fields. This article presents the design, fabrication, and operation of crosslinked liquid crystal actuators that combine microstructure programming and macroscopic shape morphing for active optics and photonics. These actuators, consisting of twisted nematic liquid crystal molecules, exhibit large bending deformations in response to heat, enabling programmable bending motions and self-sustained waddling oscillations. The achievement of dynamic 2D beam steering and self-sustained light field modulation further enhances their potential applications in autonomous active optical systems, photonic applications, and self-governing robotics.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yongqian Zhao, Jiancui Chen, Mengfei Xue, Runkun Chen, Shangtong Jia, Jianjun Chen, Lihong Bao, Hong-Jun Gao, Jianing Chen
Summary: This research demonstrates that isotope-enriched Mo element in alpha-MoO3 enables ultralow-loss phonon polaritons, reducing optical loss significantly by altering optical phonon frequencies and enhancing optical coherence, offering new possibilities for high-performance optical devices.
Article
Chemistry, Multidisciplinary
Aurimas Narkevicius, Richard M. Parker, Jordi Ferrer-Orri, Thomas G. Parton, Zihao Lu, Gea T. van de Kerkhof, Bruno Frka-Petesic, Silvia Vignolini
Summary: This study demonstrated the fabrication of chitin-based films with tunable reflection color by controlling the preparation conditions of chitin nanocrystals.
ADVANCED MATERIALS
(2022)
Article
Plant Sciences
Miranda A. A. Sinnott-Armstrong, Rox Middleton, Yu Ogawa, Gianni Jacucci, Edwige Moyroud, Beverley J. J. Glover, Paula J. J. Rudall, Silvia Vignolini, Michael J. J. Donoghue
Summary: Compared to animals, little is known about the presence of structural color in plants. In fruits, only a few instances have been described, such as the blue color in Viburnum tinus resulting from a disordered multilayered reflector made of lipid droplets. This study explores the evolutionary context of fruit structural color in the Viburnum genus by examining 30 species, using various techniques to identify the presence of photonic structures, understand the color-producing mechanism, and describe the evolution of cell wall architecture. The findings suggest multiple origins of blue fruit color in Viburnum, associated with large photonic structures made of lipid droplets embedded in the cell wall. Examining the full range of color-producing mechanisms in plants will enhance our understanding of fruit color diversity, ecology, and evolution.
Article
Chemistry, Multidisciplinary
Zhen Wang, Ruiting Li, Yating Zhang, Chun Lam Clement Chan, Johannes S. Haataja, Kui Yu, Richard M. Parker, Silvia Vignolini
Summary: Thermal or solvent annealing is commonly used to enhance the nanostructure of block copolymer (BCP) films. This study presents the application of thermal annealing to bottlebrush block copolymer (BBCP) microparticles with a photonic glass architecture, allowing for color tuning from blue to red. The process is driven by temperature-induced softening of the BBCP matrix and the absence of microphase separation. The concept is further applied to produce a thermochromic patterned hydrogel, demonstrating potential applications in smart labeling and anticounterfeiting.
ADVANCED MATERIALS
(2023)
Review
Chemistry, Physical
Dhriti Nepal, Saewon Kang, Katarina M. Adstedt, Krishan Kanhaiya, Michael R. Bockstaller, L. Catherine Brinson, Markus J. Buehler, Peter Coveney, Kaushik Dayal, Jaafar A. El-Awady, Luke C. Henderson, David L. Kaplan, Sinan Keten, Nicholas A. Kotov, George C. Schatz, Silvia Vignolini, Fritz Vollrath, Yusu Wang, Boris Yakobson, Vladimir V. Tsukruk, Hendrik Heinz
Summary: This Review discusses recent advancements in bioinspired nanocomposite design, focusing on the role of hierarchical structuring at different length scales in creating multifunctional, lightweight, and robust structural materials. By manipulating the architecture, interphases, and confinement, dynamic and synergistic responses have been achieved. The study highlights the significance of hierarchical structures across multiple length scales for achieving multifunctionality and robustness.
Article
Green & Sustainable Science & Technology
Siyi Ming, Xiaotian Zhang, Chun Lam Clement Chan, Zhen Wang, Melanie M. Bay, Richard M. M. Parker, Silvia Vignolini
Summary: Hydroxypropyl cellulose (HPC) is a widely used cellulose derivative that can form a cholesteric liquid crystal and exhibit structural color at high concentrations. By emulsifying the HPC mesophase and drying it at elevated temperature, solid microparticles reflecting color across the visible spectrum can be produced. This method provides a scalable pathway to fabricate structurally colored, edible pigments, which can replace synthetic additives used in various foods and cosmetics.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
Article
Chemistry, Multidisciplinary
Adrian Agreda, Tong Wu, Adrian Hereu, Mona Treguer-Delapierre, Glenna L. Drisko, Kevin Vynck, Philippe Lalanne
Summary: This study presents a modal-based tool that explains the appearance of disordered monolayers of resonant meta atoms. It shows that the combination of plasmonic and Fabry-Perot resonances creates unique iridescent visual effects different from those observed in natural nanostructures or thin-film interferences.
Article
Optics
Tali Lemcoff, Lotem Alus, Johannes S. Haataja, Avital Wagner, Gan Zhang, Mariela J. Pavan, Venkata Jayasurya Yallapragada, Silvia Vignolini, Dan Oron, Lukas Schertel, Benjamin A. Palmer
Summary: This study reveals that the extreme birefringence of isoxanthopterin nanospheres can overcome optical crowding effects, allowing ultra-thin chromatophore cells in shrimp to achieve multiple scattering and brilliant whiteness. Numerical simulations show that the spherulitic arrangement of isoxanthopterin molecules, which results in birefringence, enables intense broadband scattering almost up to the maximal packing for random spheres. This reduces the thickness of material required to produce brilliant whiteness, making it more efficient than other biogenic or biomimetic white materials.
Article
Chemistry, Multidisciplinary
Mehzabin Patel, Alberto Alvarez-Fernandez, Maximiliano Jara Fornerod, Anand N. P. Radhakrishnan, Alaric Taylor, Singg Ten Chua, Silvia Vignolini, Benjamin Schmidt-Hansberg, Alexander Iles, Stefan Guldin
Summary: Porous polymeric microspheres were fabricated using a new approach based on temperature-induced droplet formation and light-induced polymerization. The microspheres were prepared by exploiting the partial miscibility of a liquid crystal mixture composed of 5CB and RM257 in MeOH. The resulting microparticles showed stimuli-responsive behavior, with repeated cycles of cooling and heating causing swelling and shrinking.
Article
Physics, Multidisciplinary
Johannes S. S. Haataja, Gianni Jacucci, Thomas G. G. Parton, Lukas Schertel, Silvia Vignolini
Summary: Through a systematic investigation of light scattering in correlated disordered structures, we find that the scattering efficiency is mainly determined by topologically invariant features and the surface-averaged mean curvature. Optimal scattering efficiency can be achieved from a broad range of disordered structures, especially when structural anisotropy is considered. These results have far-reaching consequences for the industrial use of low-index materials for optical scattering.
COMMUNICATIONS PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Richard M. M. Parker, Thomas G. G. Parton, Chun Lam Clement Chan, Melanie M. Bay, Bruno Frka-Petesic, Silvia Vignolini
Summary: Polysaccharides, particularly cellulose, have diverse applications in living organisms and cellulose possesses a unique helicoidal nanostructure that can result in structural coloration. Different forms of cellulose-derived materials, such as cellulose nanocrystals (CNCs) and hydroxypropyl cellulose (HPC), can self-organize into photonic materials with a wide range of colors and visual effects. These sustainable photonic materials have potential applications in various sectors.
ACCOUNTS OF MATERIALS RESEARCH
(2023)
Article
Chemistry, Physical
Gen Kamita, Silvia Vignolini, Ahu Gumrah Dumanli
Summary: A biocompatible and edible colorimetric timer is created using the cholesteric liquid crystalline mesophases of hydroxypropyl cellulose (HPC) in water suspensions. The timer is encapsulated by shellac membranes, allowing for vibrant coloration and adjustable water evaporation rates, resulting in a visible color change. This system has potential applications in food packaging and smart labelling due to its biocompatibility and visual detection capabilities.
NANOSCALE HORIZONS
(2023)
Article
Chemistry, Multidisciplinary
Adrian Agreda, Tong Wu, Adrian Hereu, Mona Treguer-Delapierre, Glenna L. Drisko, Kevin Vynck, Philippe Lalanne
Summary: The paper presents a modal-based tool that can accurately analyze the physical mechanisms and features of colloidal disordered monolayers, and investigates the unique iridescent visual appearances created by the combination of plasmonic and Fabry-Perot resonances.
Article
Computer Science, Interdisciplinary Applications
Usman Riaz, E. Seegyoung Seol, Robert Hager, Mark S. Shephard
Summary: The accurate representation and effective discretization of a problem domain into a mesh are crucial for achieving high-quality simulation results and computational efficiency. This work presents recent developments in extending an automated tokamak modeling and meshing infrastructure to better support the near flux field following meshing requirements of the XGC Gyro-kinetic Code.
COMPUTER PHYSICS COMMUNICATIONS
(2024)
Article
Computer Science, Interdisciplinary Applications
Zhenglu Li, Gabriel Antonius, Yang-Hao Chan, Steven G. Louie
Summary: This article presents a workflow for practical calculations of electron-phonon coupling and includes the effect of many-electron correlations using GW perturbation theory. The workflow combines different software packages to enable accurate calculations at the level of quasiparticle band structures.
COMPUTER PHYSICS COMMUNICATIONS
(2024)
Article
Computer Science, Interdisciplinary Applications
Akihiro Koide, Sara Rabouli, Pierre Le Meur, Sylvain Tricot, Philippe Schieffer, Didier Sebilleau, Calogero R. Natoli
Summary: We present the MsSpec Atomic Scattering Amplitude Package (MASAP), which includes a computation program and a graphical interface for generating atomic scattering amplitude (ASA). The study investigates the applicability of plane wave (PW) and curved spherical wave (SW) scattering in describing electron propagation. The results show that the imaginary part of the optical potential enhances the elastic scattering in the forward direction but causes damping effects in other directions.
COMPUTER PHYSICS COMMUNICATIONS
(2024)
Article
Computer Science, Interdisciplinary Applications
A. Bagci, Gustavo A. Aucar
Summary: The electron repulsion integrals over Slater-type orbitals with non-integer principal quantum numbers are investigated in this study. These integrals are important in calculations of many-electron systems. New relationships free from hyper-geometric functions are derived to simplify the calculations. With the use of auxiliary functions and straightforward recurrence relationships, these integrals can be efficiently computed, providing initial conditions for the evaluation of expectation values and potentials.
COMPUTER PHYSICS COMMUNICATIONS
(2024)
Article
Computer Science, Interdisciplinary Applications
Andrzej Daniluk
Summary: RHEED_DIFF_2D is an open-source software for qualitative numerical simulations of RHEED oscillation intensity changes with layer deposition, used for interpreting heteroepitaxial structures under different scattering crystal potential models.
COMPUTER PHYSICS COMMUNICATIONS
(2024)
Article
Computer Science, Interdisciplinary Applications
Niklas Kuehl, Hendrik Fischer, Michael Hinze, Thomas Rung
Summary: The article presents a strategy and algorithm for simulation-accompanying, incremental Singular Value Decomposition (SVD) for time-evolving, spatially parallel discrete data sets. The proposed method improves computational efficiency by introducing a bunch matrix, resulting in higher accuracy and practical applicability.
COMPUTER PHYSICS COMMUNICATIONS
(2024)
Article
Computer Science, Interdisciplinary Applications
Jose M. Rodriguez-Borbon, Xian Wang, Adrian P. Dieguez, Khaled Z. Ibrahim, Bryan M. Wong
Summary: This paper presents an open-source software package called TRAVOLTA for massively parallelized quantum optimal control calculations on GPUs. The TRAVOLTA package is an improvement on the previous NIC-CAGE algorithm and incorporates algorithmic improvements for faster convergence. Three different variants of GPU parallelization are examined to evaluate their performance in constructing optimal control fields in various quantum systems. The benchmarks show that the GPU-enhanced TRAVOLTA code produces the same results as previous CPU-based algorithms but with a speedup of more than ten times. The GPU enhancements and algorithmic improvements allow large quantum optimal control calculations to be efficiently executed on modern multi-core computational hardware.
COMPUTER PHYSICS COMMUNICATIONS
(2024)
Article
Computer Science, Interdisciplinary Applications
Weijie Hua
Summary: This work introduces a program called MCNOX for computing and analyzing ultrafast nonlinear X-ray spectra. It is designed for cutting-edge applications in photochemistry/photophysics enabled by X-ray free-electron lasers and high harmonic generation light sources. The program can calculate steady-state X-ray absorption spectroscopy and three types of ultrafast nonlinear X-ray spectra, and it is capable of identifying major electronic transitions and providing physical and chemical insights from complex signals.
COMPUTER PHYSICS COMMUNICATIONS
(2024)
Article
Computer Science, Interdisciplinary Applications
Leandro Benatto, Omar Mesquita, Lucimara S. Roman, Rodrigo B. Capaz, Graziani Candiotto, Marlus Koehler
Summary: Photoluminescence Quenching Simulator (PLQ-Sim) is a user-friendly software for studying the dynamics of photoexcited states at the interface between organic semiconductors. It provides important information on organic photovoltaic and photothermal devices and calculates transfer rates and quenching efficiency.
COMPUTER PHYSICS COMMUNICATIONS
(2024)
Article
Computer Science, Interdisciplinary Applications
Dongming Li, James Kestyn, Eric Polizzi
Summary: This study introduces a practical and efficient approach to calculate the all-electron full potential band structure in real space using a finite element basis. Instead of the k-space method, this method solves the Kohn-Sham equation self-consistently within a larger finite system enclosing the unit-cell. Non-self-consistent calculations are then performed in the Brillouin zone to obtain the band structure results, which are found to be in excellent agreement with the pseudopotential k-space method. Furthermore, the study successfully observes the band bending of core electrons.
COMPUTER PHYSICS COMMUNICATIONS
(2024)
Article
Computer Science, Interdisciplinary Applications
R. Kleiber, M. Borchardt, R. Hatzky, A. Koenies, H. Leyh, A. Mishchenko, J. Riemann, C. Slaby, J. M. Garcia-Regana, E. Sanchez, M. Cole
Summary: This paper describes the current state of the EUTERPE code, focusing on the implemented models and their numerical implementation. The code is capable of solving the multi-species electromagnetic gyrokinetic equations in a three-dimensional domain. It utilizes noise reduction techniques and grid resolution transformation for efficient computation. Additionally, various hybrid models are implemented for comparison and the study of plasma-particle interactions. The code is parallelized for high scalability on multiple CPUs.
COMPUTER PHYSICS COMMUNICATIONS
(2024)
Article
Computer Science, Interdisciplinary Applications
Pengliang Yang
Summary: This paper presents an open source software called SMIwiz, which combines seismic modelling, reverse time migration, and full waveform inversion into a unified computer implementation. SMIwiz supports both 2D and 3D simulations and provides various computational recipes for efficient calculation. Its independent processing and batchwise job scheduling ensure scalability, and its viability is demonstrated through applications on benchmark models.
COMPUTER PHYSICS COMMUNICATIONS
(2024)
Article
Computer Science, Interdisciplinary Applications
Christian Tantardini, Miroslav Ilias, Matteo Giantomassi, Alexander G. Kvashnin, Valeria Pershina, Xavier Gonze
Summary: Material discovery has been an active research field, and this study focuses on developing pseudopotentials for actinides and super-heavy elements. These pseudopotentials are crucial for accurate first-principles calculations and simulations.
COMPUTER PHYSICS COMMUNICATIONS
(2024)
Article
Computer Science, Interdisciplinary Applications
S. Blanes, F. Casas, C. Gonzalez, M. Thalhammer
Summary: This paper explores the extension of modified potential operator splitting methods to specific classes of nonlinear evolution equations. Numerical experiments confirm the advantages of the proposed fourth-order modified operator splitting method over traditional splitting methods in dealing with Gross-Pitaevskii systems.
COMPUTER PHYSICS COMMUNICATIONS
(2024)
Article
Computer Science, Interdisciplinary Applications
Siegfried Kaidisch, Thomas U. Hilger, Andreas Krassnigg, Wolfgang Lucha
Summary: Motivated by a use case in theoretical hadron physics, this paper revisits an application of a pole-sum fit to dressing functions of a confined quark propagator. Specifically, it investigates approaches to determine the number and positions of singularities closest to the origin for a function known numerically on a specific grid on the positive real axis. Comparing the efficiency of standard techniques to a pure artificial-neural-network approach and a combination of both, it finds that the combined approach is more efficient. This approach can be applied to similar situations where the positions of poles need to be estimated quickly and reliably from real-axis information alone.
COMPUTER PHYSICS COMMUNICATIONS
(2024)
