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arXiv 2025年

作者： Monticone, Francesco Mortensen, N. Asger Fernández-Domínguez, Antonio I. Luo, Yu Tserkezis, Christos Khurgin, Jacob B. Shahbazyan, Tigran V. Chaves, André J. Peres, Nuno M.R. Wegner, Gino Busch, Kurt Hu, Huatian della Sala, Fabio Zhang, Pu Ciracì, Cristian Aizpurua, Javier Babaze, Antton Borisov, Andrei G. Chen, Xue-Wen Christensen, Thomas Yan, Wei Yang, Yi Hohenester, Ulrich Huber, Lorenz Wubs, Martijn de Liberato, Simone Gonçalves, P.A.D. de Abajo, F. Javier García Hess, Ortwin Tarasenko, Illya Cox, Joel D. Jelver, Line Dias, Eduardo J.C. Sánchez, Miguel Sánchez Margetis, Dionisios Gómez-Santos, Guillermo Stauber, Tobias Tretyakov, Sergei Simovski, Constantin Pakniyat, Samaneh Gómez-Díaz, J. Sebastián Bondarev, Igor V. Biehs, Svend-Age Boltasseva, Alexandra Shalaev, Vladimir M. Krasavin, Alexey V. Zayats, Anatoly V. Alù, Andrea Song, Jung-Hwan Brongersma, Mark L. Levy, Uriel Long, Olivia Y. Guo, Cheng Fan, Shanhui Bozhevolnyi, Sergey I. Overvig, Adam Prudêncio, Filipa R. Silveirinha, Mário G. Gangaraj, S. Ali Hassani Argyropoulos, Christos Huidobro, Paloma A. Galiffi, Emanuele Yang, Fan Pendry, John B. Miller, David A.B. School of Electrical and Computer Engineering Cornell University IthacaNY14853 United States POLIMA Center for Polariton-driven Light–Matter Interactions University of Southern Denmark Campusvej 55 Odense MDK-5230 Denmark D-IAS—Danish Institute for Advanced Study University of Southern Denmark Campusvej 55 Odense MDK-5230 Denmark Departamento de Física Teórica de la Materia Condensada Universidad Autónoma de Madrid MadridE-28049 Spain Universidad Autónoma de Madrid MadridE-28049 Spain School of Electrical and Electronic Engineering Nanyang Technological University Singapore639798 Singapore Key Laboratory of Radar Imaging and Microwave Photonics Ministry of Education College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics Nanjing211106 China Department of Electrical and Computer Engineering Johns Hopkins University BaltimoreMD21218 United States Department of Physics Jackson State University JacksonMS39217 United States Department of Physics Aeronautics Institute of Technology SP So Jos dos Campos12228-900 Brazil Departamento de Física Universidade do Minho BragaP-4710-057 Portugal Av Mestre José Veiga Braga4715-330 Portugal Max-Born-Institut Berlin12489 Germany Humboldt-Universität zu Berlin Institut für Physik AG Theoretische Optik and Photonik Berlin12489 Germany Center for Biomolecular Nanotechnologies Istituto Italiano di Tecnologia Via Barsanti 14 Arnesano73010 Italy Via Monteroni Campus Unisalento Lecce73100 Italy School of physics Huazhong University of Science and Technology Luoyu Road 1037 Wuhan430074 China Donostia International Physics Center DIPC Donostia-San Sebastián20018 Spain Ikerbasque Basque Foundation for Science Bilbao48009 Spain Department of Electricity and Electronics University of the Basque Country Leioa48940 Spain Department of Applied Physics University of the Basque Country Donostia20018 Spain Université Paris-Saclay CNRS Institut des Scienc

Photonic technologies continue to drive the quest for new optical materials with unprecedented responses. A major frontier in this field is the exploration of nonlocal (spatially dispersive) materials, going beyond the local, wavevector-independent assumption traditionally made in optical material modeling. On one end, the growing interest in plasmonic, polaritonic and quantum materials has revealed naturally occurring nonlocalities, emphasizing the need for more accurate models to predict and design their optical responses. This has major implications also for topological, nonreciprocal, and time-varying systems based on these material platforms. Beyond natural materials, artificially structured materials—metamaterials and metasurfaces–can provide even stronger and engineered nonlocal effects, emerging from long-range interactions or multipolar effects. This is a rapidly expanding area in the field of photonic metamaterials, with open frontiers yet to be explored. In the case of metasurfaces, in particular, nonlocality engineering has become a powerful tool for designing strongly wavevector-dependent responses, enabling enhanced wavefront control, spatial compression, multifunctional devices, and wave-based computing. Furthermore, nonlocality and related concepts play a critical role in defining the ultimate limits of what is possible in optics, photonics, and wave physics. This Roadmap aims to survey the most exciting developments in nonlocal photonic materials, highlight new opportunities and open challenges, and chart new pathways that will drive this emerging field forward–toward new scientific discoveries and technological advancements. Copyright © 2025, The Authors. All rights reserved.

关键词： Nanocrystals

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Optimized implementation of the conjugate gradient algorithm for FPGA-based platforms using the Dirac-Wilson operator as an example

arXiv

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arXiv 2020年

作者： Korcyl, G. Korcyl, P. Department of Information Technologies Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Kraków Poland M. Smoluchowski Institute of Physics Jagiellonian University Kraków Poland Institut für Theoretische Physik Universität Regensburg Regensburg Germany

It is now a noticeable trend in High Performance Computing that the systems are becoming more and more heterogeneous. Compute nodes with a host CPU are being equipped with accelerators, the latter being a GPU or FPGA cards or both. In many cases at the heart of scientific applications running on such systems are iterative linear solvers. In this work we present a software package which includes an FPGA implementation of the Conjugate Gradient algorithm using a particular problem of the Dirac-Wilson operator as encountered in numerical simulations of Quantum Chromodynamics. The software is written in OpenCL and C++ and is optimized for maximal performance. Our framework allows for a simple implementation of other linear operators, while keeping the data transport mechanisms unaltered. Hence, our software can serve as a backbone for many applications which are expected to gain a significant boost factor on FPGA accelerators. As such systems are expected to become more and more widespread, the need for highly performant FPGA implementations of the Conjugate Gradient algorithm and its variants will certainly increase and the porting investment can be greatly facilitated by the attached code. Copyright © 2020, The Authors. All rights reserved.

关键词： Field programmable gate arrays (FPGA)

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Trimeron-phonon coupling in magnetite

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Physical Review B 2021年第10期103卷 104303-104303页

作者： Przemysław Piekarz Dominik Legut Edoardo Baldini Carina A. Belvin Tomasz Kołodziej Wojciech Tabiś Andrzej Kozłowski Zbigniew Kakol Zbigniew Tarnawski José Lorenzana Nuh Gedik Andrzej M. Oleś Jürgen M. Honig Krzysztof Parlinski Institute of Nuclear Physics Polish Academy of Sciences Radzikowskiego 152 31-342 Kraków Poland IT4Innovations VSB-Technical University of Ostrava 17.listopadu 2172/15 708 00 Ostrava-Poruba Czech Republic Department of Physics Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA SOLARIS National Synchrotron Radiation Centre Czerwone Maki 98 30-392 Kraków Poland AGH University of Science and Technology Faculty of Physics and Applied Computer Science 30-059 Kraków Poland La Sapienza University 00-185 Rome Italy Institute of Theoretical Physics Jagiellonian University Profesora Stanisława Łojasiewicza 11 30-348 Kraków Poland Max Planck Institute for Solid State Research Heisenbergstrasse 1 70569 Stuttgart Germany Department of Chemistry Purdue University West Lafayette Indiana 47907-2084 USA

Using density functional theory, we study the lattice dynamical properties of magnetite (Fe3O4) in the high-temperature cubic and low-temperature monoclinic phases. The calculated phonon dispersion curves and density of states are compared with the available experimental data obtained by inelastic neutron, inelastic x-ray, and nuclear inelastic scattering. We find a very good agreement between the theoretical and experimental results for the monoclinic Cc structure revealing the strong coupling between the charge-orbital (trimeron) order and specific phonon modes. For the cubic phase, clear discrepancies arise due to fluctuation effects, which are not included in the calculation method. Despite this shortcoming, we argue that the main spectral features can be understood assuming that the strong trimeron-phonon coupling is extended above the Verwey transition, with lattice dynamics influenced by the short-range order instead of the average cubic structure. Our results indicate the validity of trimerons (and trimeron-phonon coupling) to explain the physics of magnetite much beyond their original formulation.

关键词： Charge density waves Lattice dynamics Phase transitions Phonons Polarons Crystal structures Ferrimagnets Strongly correlated systems Chern-Simons gauge theory Density functional theory

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A Comparison of CPU and GPU Implementations for the LHCb Experiment Run 3 Trigger

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Computing and Software for Big science 2022年第1期6卷 1-20页

作者： Aaij, R. Adinolfi, M. Aiola, S. Akar, S. Albrecht, J. Alexander, M. Amato, S. Amhis, Y. Archilli, F. Bala, M. Bassi, G. Bian, L. Blago, M.P. Boettcher, T. Boldyrev, A. Borghi, S. Rodriguez, A. Brea Calefice, L. Gomez, M. Calvo Pérez, D. H. Cámpora Cardini, A. Cattaneo, M. Chobanova, V. Ciezarek, G. Vidal, X. Cid Cobbledick, J.L. Coelho, J.A.B. Colombo, T. Contu, A. Couturier, B. Craik, D.C. Currie, R. d’Argent, P. De Cian, M. Derkach, D. Dordei, F. Dorigo, M. Dufour, L. Durante, P. Dziurda, A. Dzyuba, A. Easo, S. Esen, S. Declara, P. Fernandez Filippov, S. Fitzpatrick, C. Frank, M. Gandini, P. Gligorov, V.V. Golobardes, E. Graziani, G. Grillo, L. Günther, P.A. Hansmann-Menzemer, S. Hennequin, A.M. Henry, L. Hill, D. Hollitt, S.E. Hu, J. Hulsbergen, W. Hunter, R.J. Hushchyn, M. Jashal, B.K. Jones, C.R. Klaver, S. Klimaszewski, K. Kopecna, R. Krzemien, W. Kucharczyk, M. Lane, R. Lazzari, F. Gac, R. Le Li, P. Lopes, J.H. Martinez, M. Lucio Lupato, A. Lupton, O. Lyu, X. Machefert, F. Madejczyk, O. Malde, S. Marchand, J.F. Mariani, S. Benito, C. Marin Santos, D. Martinez Vidal, F. Martinez Matev, R. Mazurek, M. Mitreska, B. Mitzel, D.S. Morello, M.J. Mu, H. Muzzetto, P. Naik, P. Needham, M. Neri, N. Neufeld, N. Nolte, N.S. O’Hanlon, D. Oyanguren, A. Altarelli, M. Pepe Petrucci, S. Petruzzo, M. Pica, L. Pisani, F. Piucci, A. Polci, F. Poluektov, A. Polycarpo, E. Prouve, C. Punzi, G. Quagliani, R. Trejo, R. I. Rabadan Pernas, M. Ramos Rangel, M.S. Ratnikov, F. Raven, G. Reiss, F. Renaudin, V. Robbe, P. Ryzhikov, A. Santimaria, M. Saur, M. Schiller, M. Schwemmer, R. Sciascia, B. Solomin, A. Suljik, F. Skidmore, N. Sokoloff, M.D. Spradlin, P. Stahl, M. Stahl, S. Stevens, H. Sun, L. Szabelski, A. Szumlak, T. Szymanski, M. Tou, D.Y. Tuci, G. Usachov, A. Canudas, N. Valls Gomez, R. Vazquez Vecchi, S. Vesterinen, M. Vilasis-Cardona, X. Bruch, D. Vom Wang, Z. Wojton, T. Whitehead, M. Williams, M. Witek, M. Xie, Y. Xu, A. Yin, H. Zdybal, M. Zenaiev, O. Zhang, D. Zhang, L. Zhu, X. Universidade Federal do Rio de Janeiro (UFRJ) Rio de Janeiro Brazil Center for High Energy Physics Tsinghua University Beijing China School of Physics State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China University of Chinese Academy of Sciences Beijing China Institute of Particle Physics Central China Normal University Hubei Wuhan China Univ. Grenoble Alpes Univ. Savoie Mont Blanc CNRS IN2P3-LAPP Annecy France Aix Marseille Univ CNRS/IN2P3 CPPM Marseille France Université Paris-Saclay CNRS/IN2P3 IJCLab Orsay France LPNHE Sorbonne Université Paris Diderot Sorbonne Paris Cité CNRS/IN2P3 Paris France Fakultät Physik Technische Universität Dortmund Dortmund Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany INFN Sezione di Ferrara Ferrara Italy INFN Sezione di Firenze Florence Italy INFN Laboratori Nazionali di Frascati Frascati Italy INFN Sezione di Milano Milan Italy INFN Sezione di Cagliari Monserrato Italy INFN Sezione di Pisa Pisa Italy Nikhef National Institute for Subatomic Physics Amsterdam Netherlands Nikhef National Institute for Subatomic Physics and VU University Amsterdam Amsterdam Netherlands Faculty of Physics and Applied Computer Science AGH University of Science and Technology Kraków Poland Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences Kraków Poland National Center for Nuclear Research (NCBJ) Warsaw Poland Petersburg Nuclear Physics Institute NRC Kurchatov Institute (PNPI NRC KI) Gatchina Russian Federation Institute for Nuclear Research of the Russian Academy of Sciences (INR RAS) Moscow Russian Federation ICCUB Universitat de Barcelona Barcelona Spain Instituto Galego de Física de Altas Enerxías (IGFAE) Universidade de Santiago de Compostela Santiago Spain Instituto de Fisica Corpuscular Centro Mixto Universidad de Valencia CSIC Valencia Spain European Organization for Nuclear Research (CERN) Geneva Switzerland Instit

The Large Hadron Collider beauty (LHCb) experiment at CERN is undergoing an upgrade in preparation for the Run 3 data collection period at the Large Hadron Collider (LHC). As part of this upgrade, the trigger is moving to a full software implementation operating at the LHC bunch crossing rate. We present an evaluation of a CPU-based and a GPU-based implementation of the first stage of the high-level trigger. After a detailed comparison, both options are found to be viable. This document summarizes the performance and implementation details of these options, the outcome of which has led to the choice of the GPU-based implementation as the baseline. © 2021, The Author(s).

关键词： Heterogeneous High-level trigger High-throughput Parallel computing Real-time Software

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Bottom quark energy loss and hadronization with B+ and nuclear modification factors using pp and PbPb collisions at = 5.02 TeV

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Journal of High Energy physics 2025年第2期2025卷 1-40页

作者： Hayrapetyan, A. Tumasyan, A. Adam, W. Andrejkovic, J. W. Bergauer, T. Chatterjee, S. Damanakis, K. Dragicevic, M. Hussain, P. S. Jeitler, M. Krammer, N. Li, A. Liko, D. Mikulec, I. Schieck, J. Schöfbeck, R. Schwarz, D. Sonawane, M. Templ, S. Waltenberger, W. Wulz, C.-E. Darwish, M. R. Janssen, T. Van Mechelen, P. Breugelmans, N. D’Hondt, J. Dansana, S. De Moor, A. Delcourt, M. Heyen, F. Lowette, S. Makarenko, I. Müller, D. Tavernier, S. Tytgat, M. Van Onsem, G. P. Van Putte, S. Vannerom, D. Bilin, B. Clerbaux, B. Das, A. K. De Lentdecker, G. Evard, H. Favart, L. Gianneios, P. Jaramillo, J. Khalilzadeh, A. Khan, F. A. Lee, K. Mahdavikhorrami, M. Malara, A. Paredes, S. Shahzad, M. A. Thomas, L. Vanden Bemden, M. Vander Velde, C. Vanlaer, P. De Coen, M. Dobur, D. Gokbulut, G. Hong, Y. Knolle, J. Lambrecht, L. Marckx, D. Mota Amarilo, K. Samalan, A. Skovpen, K. Van Den Bossche, N. van der Linden, J. Wezenbeek, L. Benecke, A. Bethani, A. Bruno, G. Caputo, C. De Favereau De Jeneret, J. Delaere, C. Donertas, I. S. Giammanco, A. Guzel, A. O. Jain, Sa. Lemaitre, V. Lidrych, J. Mastrapasqua, P. Tran, T. T. Wertz, S. Alves, G. A. Alves Gallo Pereira, M. Coelho, E. Correia Silva, G. Hensel, C. Menezes De Oliveira, T. Moraes, A. Rebello Teles, P. Soeiro, M. Vilela Pereira, A. Aldá Júnior, W. L. Barroso Ferreira Filho, M. Brandao Malbouisson, H. Carvalho, W. Chinellato, J. Da Costa, E. M. Da Silveira, G. G. De Jesus Damiao, D. Fonseca De Souza, S. Gomes De Souza, R. Macedo, M. Martins, J. Mora Herrera, C. Mundim, L. Nogima, H. Pinheiro, J. P. Santoro, A. Sznajder, A. Thiel, M. Bernardes, C. A. Calligaris, L. Fernandez Perez Tomei, T. R. Gregores, E. M. Maietto Silverio, I. Mercadante, P. G. Novaes, S. F. Orzari, B. Padula, Sandra S. Aleksandrov, A. Antchev, G. Hadjiiska, R. Iaydjiev, P. Misheva, M. Shopova, M. Sultanov, G. Dimitrov, A. Litov, L. Pavlov, B. Petkov, P. Petrov, A. Shumka, E. Keshri, S. Thakur, S. Cheng, T. Javaid, T. Yuan, L. Hu, Z. Liang, Z. Liu, J. Yi, K. Chen, G. M. Chen, H. S. Chen, M. Iemmi, F. Jiang, C. H. Yerevan Physics Institute Yerevan Armenia Yerevan State University Yerevan Armenia Institut für Hochenergiephysik Vienna Austria TU Wien Vienna Austria Universiteit Antwerpen Antwerpen Belgium Institute of Basic and Applied Sciences Faculty of Engineering Arab Academy for Science Technology and Maritime Transport Alexandria Egypt Vrije Universiteit Brussel Brussel Belgium Ghent University Ghent Belgium Université Libre de Bruxelles Bruxelles Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual de Campinas Campinas Brazil Federal University of Rio Grande do Sul Porto Alegre Brazil UFMS Nova Andradina Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Instituto De Alta Investigación Universidad de Tarapacá Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China Nanjing Normal University Nanjing China The University of Iowa Iowa City USA Institute of High Energy Physics Beijing China University of Chinese Academy of Sciences Beijing China China Center of Advanced Science and Technology Beijing China China Spallation Neutron Source Guangdong China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Guangdong Provincial Key Laboratory of Nuclear Science and Guangdong-Hong Kong Joint Laboratory of Quantum Matter South China Normal University Guangzhou China Sun Yat-Sen University Guangzhou China University of Science and Technology of China Hefei China Henan Normal University Xinxiang China Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) - Fudan University Shanghai China Zhejiang University Hangzhou Ch

The production cross sections of $$ {\textrm{B}}_{\textrm{s}}^0 $$ and B+ mesons are reported in proton-proton (pp) collisions recorded by the CMS experiment at the CERN LHC with a center-of-mass energy of 5.02 TeV. The data sample corresponds to an integrated luminosity of 302 pb−1. The cross sections are based on measurements of the $$ {\textrm{B}}_{\textrm{s}}^0 $$ → J/ψ(μ+μ−)ϕ(1020)(K+K−) and B+ → J/ψ(μ+μ−)K+ decay channels. Results are presented in the transverse momentum (pT) range 7–50 GeV/c and the rapidity interval |y| < 2.4 for the B mesons. The measured pT-differential cross sections of B+ and $$ {\textrm{B}}_{\textrm{s}}^0 $$ in pp collisions are well described by fixed-order plus next-to-leading logarithm perturbative quantum chromodynamics calculations. Using previous PbPb collision measurements at the same nucleon-nucleon center-of-mass energy, the nuclear modification factors, RAA, of the B mesons are determined. For pT > 10 GeV/c, both mesons are found to be suppressed in PbPb collisions (with RAA values significantly below unity), with less suppression observed for the $$ {\textrm{B}}_{\textrm{s}}^0 $$ mesons. In this pT range, the RAA values for the B+ mesons are consistent with those for inclusive charged hadrons and D0 mesons. Below 10 GeV/c, both B+ and $$ {\textrm{B}}_{\textrm{s}}^0 $$ are found to be less suppressed than either inclusive charged hadrons or D0 mesons, with the $$ {\textrm{B}}_{\textrm{s}}^0 $$ RAA value consistent with unity. The RAA values found for the B+ and $$ {\textrm{B}}_{\textrm{s}}^0 $$ are compared to theoretical calculations, providing constraints on the mechanism of bottom quark energy loss and hadronization in the quark-gluon plasma, the hot and dense matter created in ultrarelativistic heavy ion collisions.

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From polarized gravitational waves to analytically solvable electromagnetic beams

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Physical Review D 2019年第4期100卷 045006-045006页

作者： K. Andrzejewski S. Prencel Department of Computer Science Faculty of Physics and Applied Informatics University of Lodz Pomorska 149/153 90-236 Lodz Poland

Using the correspondence between solutions of gravitational and gauge theories (the so-called classical double copy conjecture) some electromagnetic fields with vortices are constructed, for which the Lorentz force equations are analytically solvable. The starting point is a certain class of plane gravitational waves exhibiting the conformal symmetry. The notion of the Niederer transformation, crucial for the solvability, is analyzed in the case of the Lorentz force equation on the curved spacetimes as well as its derivation by means of integrals of motion (associated with conformal generators preserving these vortices) is presented. Furthermore, some models discussed recently in the context of the intense laser beams are constructed from their gravitational counterparts, with the special emphasis put on the focusing property, and new solvable examples are presented.

关键词： Electromagnetic field calculations Gauge-gravity dualities General relativity Gravitational waves Geometry Integrable systems Mathematical physics methods

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Kaonic lead feasibility measurement at DAΦNE to solve the charged kaon mass discrepancy

arXiv

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arXiv 2024年

作者： Bosnar, D. Abbene, L. Amsler, C. Artibani, F. Bazzi, M. Bragadireanu, M. Buttacavoli, A. Cargnelli, M. Carminati, M. Clozza, A. Clozza, F. Deda, G. De Paolis, L. Del Grande, R. Dulski, K. Fabbietti, L. Fiorini, C. Friščić, I. Guaraldo, C. Iliescu, M. Iwasaki, M. Khreptak, A. Makek, M. Manti, S. Marton, J. Moskal, P. Napolitano, F. Niedźwiecki, S. Ohnishi, H. Piscicchia, K. Scordo, A. Sgaramella, F. Sirghi, D. Sirghi, F. Skurzok, M. Silarski, M. Spallone, A. Toho, K. Tüchler, M. Doce, O. Vasquez Zmeskal, J. Curceanu, C. Department of Physics Faculty of Science University of Zagreb Bijenička c.32 Zagreb10000 Croatia Dipartimento di Fisica e Chimica - Emilio Segrè Università di Palermo Viale Delle Scienze Edificio 18 Palermo90128 Italy Stefan-Meyer-Institut für Subatomare Physik Kegelgasse 27 Vienna1030 Austria Laboratori Nazionali di Frascati INFN Via E. Fermi 54 Frascati00044 Italy Reactorului 30 Magurele077125 Romania Politecnico di Milano Dipartimento di Elettronica Informazione e Bioingegneria INFN Sezione di Milano Via Giuseppe Ponzio 34 Milano20133 Italy Excellence Cluster Universe Technische Universität München Garching Boltzmann str. 2 Garching85748 Germany RIKEN 2-1 Hirosawa Saitama Wako Tokyo351-0198 Japan Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Lojasiewicza 11 Krakow30-348 Poland Centre for Theranostics Jagiellonian University Kopernika 40 Krakow31-501 Poland Tohoku University 1-2-1 MikamineTaihaku-ku Sendai982-0826 Japan Centro Ricerche Enrico Fermi - Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi" Via Panisperna 89A Roma00184 Italy

An HPGe detector equipped with a transistor reset preamplifier and readout with a CAEN DT5781 fast pulse digitizer was employed in the measurement of X-rays from kaonic lead at the DAΦNE e+e− collider at the Laboratori Nazionali di Frascati of INFN. A thin scintillator in front of a lead target was used to select kaons impinging on it and to form the trigger for the HPGe detector. We present the results of the kaonic lead feasibility measurement, where we show that the resolution of the HPGe detector in regular beam conditions remains the same as that without the beam and that a satisfactory background reduction can be achieved. This measurement serves as a test bed for future dedicated kaonic X-rays measurements for the more precise determination of the charged kaon mass. © 2024, CC BY.

关键词： Germanium compounds

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Numerical simulation of a non-linear nanofluidic model to characterise the MHD chemically reactive flow past an inclined stretching surface

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Partial Differential Equations in applied Mathematics 2022年 5卷

作者： Reza-E-Rabbi, Sk. Khan, Md. Shakhaoath Arifuzzaman, S.M. Islam, Saiful Biswas, Pronab Rana, B.M.J. Al-Mamun, Abdullah Hayat, Taswar Ahmmed, Sarder Firoz Mathematics Discipline Khulna University Khulna 9208 Bangladesh Department of Chemical and Biological Engineering Monash University VIC 3800 Australia Centre for Infrastructure Engineering Western Sydney University NSW 2751 Australia Department of Computer Science and Engineering Stamford University Bangladesh Dhaka 1217 Bangladesh Department of Applied Mathematics GonoBishwabidyalay Dhaka 1344 Bangladesh Physics Discipline Khulna University Khulna 9208 Bangladesh Department of Mathematics Quaid-I-Azam University 45320 Islamabad 44000 Pakistan Faculty of Science King Abdulaziz University Jeddah 21589 Saudi Arabia

A computational approach is delineated for mass and heat transport enhancement/reduction process to control the drift of nanofluid. The fluid is drifting on the inclined stretched surface. This numerical study demands the resolution of fundamental (conservation momentum, mass transfer, and energy) equations and for which computational proficiency is a challenge. The time-dependent concentration and temperature on the periphery, together with stretched velocity, are the basis of the transient mixed convective laminar nanofluid flow. A similar transformations technique is imposed to adopt a system of time dominated non-linear fundamental equations and transformed it into a differential equation of the ordinary system. It is solved computationally by utilising the scheme of Nactsheim–Swigert shooting along with the iteration process, namely Runge–Kutta of order six. The obtained model depends on diversified natural parameters and is narrated on several profiles. Moreover, an explicit scheme has also been imposed to illustrate the developed visualisation of the fluid flow with the aid of streamlines and isothermal lines. Here, the stretching parameter demonstrates a provoking character on the momentum boundary layer, and the Prandtl number depicts an insignificant minimal impact on the mass transfer flow. The accuracy of this model is found satisfactory by validating with experimental data and comparing it with the previous numerical tests. This investigation has applications in engineering industries in thermal nano-technological materials processing and manufactures. © 2022 The Author(s)

关键词： Chemical reaction Heat/mass enhancement Magnetohydrodynamics Nano-science Non-linear PDEs Stretching sheet

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Ultrafast Spin Initialization in a Gated InSb Nanowire Quantum Dot

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Physical Review applied 2019年第3期11卷 034012-034012页

作者： S. Bednarek J. Pawłowski M. Górski G. Skowron Faculty of Physics and Applied Computer Science AGH University of Science and Technology Kraków Poland Department of Theoretical Physics Faculty of Fundamental Problems of Technology Wrocław University of Science and Technology Wybrzeże Wyspiańskiego 27 50-370 Wrocław Poland

We propose a fast spin-initialization method for a single electron trapped in an electrostatic quantum dot. The dot is created in a nanodevice composed of a catalytically grown indium antimonide (InSb) nanowire and nearby gates to which control voltages are applied. Initially, we insert a single electron of arbitrary spin into the wire. Operations on spin are performed using the Rashba spin-orbit interaction induced by an electric field. First, a single pulse of voltages applied to lateral gates is used to split the electron wave packet into two parts with opposite spin orientations. Next, another voltage pulse applied to the remaining gates rotates the spins of both parts in opposite directions by π/2. In this way, initially opposite-spin parts eventually point in the same direction, along the axis of the quantum wire. We thus set spin in a predefined direction regardless of its initial orientation. This is achieved in time less than 60ps, without the use of microwaves, photons, or external magnetic fields.

关键词： Quantum computation Quantum information with solid state qubits Spin-orbit coupling Spintronics III-V semiconductors Quantum dots Quantum wires

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Comprehensive Approach for Porous Materials Analysis Using a Dedicated Preprocessing Tool for Mass and Heat Transfer Modeling

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Journal of Thermal science 2018年第5期27卷 479-486页

作者： MADEJSKI Pawel KRAKOWSKA Paulina HABRAT Magdalena PUSKARCZYK Edyta JEDRYCHOWSKI Mariusz Department of Power Systems and Environmental Protection Facilities Faculty of Mechanical Engineering and Ro-botics AGH University of Science and TechnologyKraków 30-059 Poland Department of Geophysics Faculty of Geology Geophysics and Environmental Protection AGH University of Sci-ence and Technology Kraków 30-059 Poland Department of Geoinformatics and Applied Computer Science Faculty of Geology Geophysics and Environmental Protection AGH University of Science and TechnologyKraków 30-059 Poland Department of Condensed Matter Physics Faculty of Physics and Applied Computer Science AGH University of Science and TechnologyKraków 30-059 Poland

The paper presents a comprehensive, newly developed software – poROSE(poROus materials examination SoftwarE) for the qualitative and quantitative assessment of porous materials and analysis methodologies developed by the authors as a solution for emerging challenges. A low porosity rock sample was analyzed and thanks to the developed and implemented methodologies in poROSE software, the main geometrical properties were calculated. A tool was also used in preprocessing part of the computational analysis to prepare a geometrical representation of the porous material. The basic functions as elimination of blind pores in the geometrical model were completed and the geometrical model was exported for CFD software. As a result, it was possible to carry out calculations of the basic properties of the analyzed porous material sample. The developed tool allows to carry out quantitative and qualitative analysis to determine the most important properties characterized porous materials. In presented tool the input data can be images from X-ray computed tomography(CT), scanning electron microscope(SEM) or focused ion beam with scanning electron microscope(FIB-SEM) in grey level. A geometric model developed in the proper format can be used as an input to modeling mass, momentum and heat transfer, as well as, in strength or thermo-strength analysis of any porous materials. In this example, thermal analysis was carried out on the skeleton of rock sample. Moreover, thermal conductivity was estimated using empirical equations.

关键词： porous materials rock software thermal properties preprocessing

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