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IEEE Symposium on Nuclear science (NSS/MIC)

作者： F. Tayefi Ardebili S. Niedźwiecki J. Baran E. Beyene D. Borys K. Brzezinski N. Chug A. Coussat C. Curceanu E. Czerwinski M. Dadgar K. Dulski K. Eliyan J. Gajewski A. Gajos B. Hiesmayr A. Jedruszczak K. Kacprzak M. Kajetanowicz T. Kaplanoglu L. Kapłon K. Klimaszewski G. Korcyl T. Kozik W. Krzemien D. Kumar G. Lapkiewicz W. Migdal S. Moyo W. Mryka S. Parzych E. Pérez del Río L. Raczyński S. Sharma S. Shivani R. Shopa M. Skurzok P. Tanty K. Tayefi Ardebili W. Wislicki E. Stępień P. Moskal Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Krakow Poland Center for Theranostics Jagiellonian University Krakow Poland Total-Body Jagiellonian-PET Laboratory Jagiellonian University Krakow Poland Faculty of Physics University of Vienna Vienna Austria Department of Systems Biology and Engineering Silesian University of Technology Gliwice Poland Laboratori Nazionali di Frascati INFN Frascati Italy Department of Electronics and Information Systems Ghent University Ghent Belgium Department of Complex Systems National Centre for Nuclear Research Otwock-Swierk Poland Institute of Nuclear Physics PAN IFJPAN Krakow Poland

The Modular J-PET scanner, developed by the J-PET collaboration, is a new prototype PET scanner developed based on axially arranged plastic scintillators as a large axial field of view (50cm) affordable tomograph. In this study, the performance characteristics of the scanner were evaluated according to NEMA NU2-2018 standards using Monte Carlo simulation. In order to ensure the selection of true coincidence events, certain criteria were established. Specifically, each photon emitting from a single annihilation must deposit at least 200 keV within 4 ns of a coincidence time window. The preliminary results showed that the sensitivity profile peak was 4 cps/kBq at the center of the detector, While the scatter fraction was estimated to be 39% using the single slice rebinning algorithm. Spatial resolution was estimated around 4.5 mm in the radial and tangential direction and 18 mm in the axial direction.

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Progress in two-loop Master Integrals computation

Progress in two-loop Master Integrals computation

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2022 Loops and Legs in Quantum Field Theory, LL 2022

作者： Kardos, Adam Papadopoulos, Costas G. Smirnov, Alexander V. Syrrakos, Nikolaos Wever, Christopher University of Debrecen Faculty of Science and Technology Department of Experimental Physics PO Box 105 Debrecen4010 Hungary Institute of Nuclear and Particle Physics NCSR Demokritos Patr. Grigoriou E' & 27 Neapoleos Str Agia Paraskevi15341 Greece Research Computing Center Moscow State University Moscow119991 Russia Moscow Center for Fundamental and Applied Mathematics Moscow119992 Russia Physik-Department Technische Universität München James-Franck-Str. 1 Garching85748 Germany Physics Division National Technical University of Athens Zografou Campus Athens15780 Greece

Over the last years, master integral families at one, two and three loops, with up to five external particles, including off-shell legs and internal masses have been computed analytically based on the Simplified Differential Equations approach. In this presentation we focus on the latest results for two-loop five-point Feynman Integrals with one off-shell leg. The three planar and one of the non-planar families have been fully expressed in terms of Goncharov polylogarithms. For the other two non-planar families, we introduce a new approach to obtain the boundary terms and establish a one-dimensional integral representation of the master integrals in terms of generalised polylogarithms, when the alphabet contains non-factorizable square roots. The results are relevant to the study of NNLO QCD corrections for W, Z and Higgs-boson production in association with two hadronic jets. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0)

关键词： Differential equations

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MRP 2019: Cross-framework meaning representation parsing 23

MRP 2019: Cross-framework meaning representation parsing

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2019 Shared Task on Cross-Framework Meaning Representation Parsing, MRP 2019 at the 23rd Conference for Computational Language Learning, CoNLL 2019

作者： Oepen, Stephan Abend, Omri Hajič, Jan Hershcovich, Daniel Kuhlmann, Marco O'Gorman, Tim Xue, Nianwen Chun, Jayeol Straka, Milan Urešová, Zdeňka University of Oslo Department of Informatics Norway Hebrew University of Jerusalem School of Computer Science and Engineering Israel Charles University in Prague Faculty of Mathematics and Physics Institute of Formal and Applied Linguistics Czech Republic University of Copenhagen Department of Computer Science Denmark Linköping University Department of Computer and Information Science Sweden University of Colorado at Boulder Department of Linguistics United States Brandeis University Department of Computer Science United States

ISBN: (纸本)9781950737604

The 2019 Shared Task at the Conference for Computational Language Learning (CoNLL) was devoted to Meaning Representation Parsing (MRP) across frameworks. Five distinct approaches to the representation of sentence meaning in the form of directed graphs were represented in the training and evaluation data for the task, packaged in a uniform graph abstraction and serialization. The task received submissions from eighteen teams, of which five do not participate in the official ranking because they arrived after the closing deadline, made use of extra training data, or involved one of the task co-organizers. All technical information regarding the task, including system submissions, official results, and links to supporting resources and software are available from the task web site at: http://***. © 2019 Association for Computational Linguistics

关键词： Directed graphs

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Dynamic control of 2D non-Hermitian photonic corner states in synthetic dimensions

arXiv

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arXiv 2024年

作者： Zheng, Xinyuan Mehrabad, Mahmoud Jalali Vannucci, Jonathan Li, Kevin Dutt, Avik Hafezi, Mohammad Mittal, Sunil Waks, Edo Institute for Research in Electronics and Applied Physics University of Maryland College ParkMD20742 United States Joint Quantum Institute University of Maryland College ParkMD20742 United States Department of Mechanical Engineering Institute for Physical Science and Technology University of Maryland College ParkMD20742 United States Department of Electrical and Computer Engineering Northeastern University BostonMA United States

Non-Hermitian models describe the physics of ubiquitous open systems with gain and loss. One intriguing aspect of non-Hermitian models is their inherent topology that can produce intriguing boundary phenomena like resilient higher-order topological insulators (HOTIs) and non-Hermitian skin effects (NHSE). Recently, time-multiplexed lattices in synthetic dimensions have emerged as a versatile platform for the investigation of these effects free of geometric restrictions. Despite holding broad applications, studies of these effects have been limited to static cases so far, and full dynamical control over the non-Hermitian effects has remained elusive. Here, we demonstrate the emergence of topological non-Hermitian corner states with remarkable temporal controllability and robustness in a two-dimensional photonic synthetic time lattice. Specifically, we showcase various dynamic control mechanisms for light confinement and flow, including spatial mode tapering, sequential non-Hermiticity on-off switching, dynamical corner state relocation, and light steering. Moreover, we establish the corner state's robustness in the presence of intensity modulation randomness and quantitatively determine its breakdown regime. Our findings extend non-Hermitian and topological photonic effects into higher synthetic dimensions, offering remarkable flexibility and real-time control possibilities. This opens avenues for topological classification, quantum walk simulations of manybody dynamics, and robust Floquet engineering, free from the limitations of physical geometries. © 2024, CC BY.

关键词： Topology

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PRESCRIBING Q-CURVATURE ON EVEN-DIMENSIONAL MANIFOLDS WITH CONICAL SINGULARITIES

arXiv

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arXiv 2022年

作者： Jevnikar, Aleks Sire, Yannick Yang, Wen Department of Mathematics Computer Science and Physics University of Udine Via delle Scienze 206 Udine33100 Italy Department of Mathematics Johns Hopkins University 3400 N. Charles Street BaltimoreMD21218 United States Department of Mathematics Faculty of Science and Technology University of Macau China

On a 2m-dimensional closed manifold we investigate the existence of prescribed Q-curvature metrics with conical singularities. We present here a general existence and multiplicity result in the supercritical regime. To this end, we first carry out a blow-up analysis of a 2mth-order PDE associated to the problem and then apply a variational argument of min-max type. For m > 1, this seems to be the first existence result for supercritical conic manifolds different from the sphere. Copyright © 2022, The Authors. All rights reserved.

关键词： Blowouts

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Hybrid Oscillator-Qubit Quantum Processors: Instruction Set Architectures, Abstract Machine Models, and Applications

arXiv

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arXiv 2024年

作者： Liu, Yuan Singh, Shraddha Smith, Kevin C. Crane, Eleanor Martyn, John M. Eickbusch, Alec Schuckert, Alexander Li, Richard D. Sinanan-Singh, Jasmine Soley, Micheline B. Tsunoda, Takahiro Chuang, Isaac L. Wiebe, Nathan Girvin, Steven M. Department of Physics Massachusetts Institute of Technology CambridgeMA02139 United States Department of Electrical and Computer Engineering North Carolina State University RaleighNC27606 United States Department of Computer Science North Carolina State University RaleighNC27606 United States Yale Quantum Institute Yale University New HavenCT06511 United States Departments of Applied Physics and Physics Yale University New HavenCT06520 United States Brookhaven National Laboratory UptonNY11973 United States Joint Quantum Institute QuICS NIST University of Maryland College ParkMD20742 United States Department of Chemistry University of Wisconsin-Madison MadisonWI53706 United States Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology CambridgeMA02139 United States Department of Computer Science University of Toronto TorontoONM5S1J7 Canada Canadian Institute for Advanced Research TorontoON Canada Pacific Northwest National Laboratory RichlandWA United States

Quantum computing with discrete variable (DV, qubit) hardware is approaching the large scales necessary for computations beyond the reach of classical computers. However, important use cases such as quantum simulations of physical models containing bosonic modes, and quantum error correction are challenging for DV-only systems. Separately, hardware containing native continuous-variable (CV, oscillator) systems has received attention as an alternative approach, yet the universal control of such systems is non-trivial. In this work, we show that hybrid CV-DV hardware offers a great advantage in meeting these challenges, offering a powerful computational paradigm that inherits the strengths of both DV and CV processors. We provide a pedagogical introduction to CV-DV systems and the multiple abstraction layers needed to produce a full software stack connecting applications to hardware. We present a variety of new hybrid CV-DV compilation techniques, algorithms, and applications, including the extension of quantum signal processing concepts to CV-DV systems and strategies to simulate systems of interacting spins, fermions, and bosons. To facilitate the development of hybrid CV-DV processor systems, we introduce formal Abstract Machine Models and Instruction Set Architectures – essential abstractions that enable developers to formulate applications, compile algorithms, and explore the potential of current and future hardware for realizing fault-tolerant circuits, modules, and processors. Hybrid CV-DV quantum computations are beginning to be performed in superconducting, trapped ion, and neutral atom platforms, and large-scale experiments are set to be demonstrated in the near future. We present a timely and comprehensive guide to this relatively unexplored yet promising approach to quantum computation and provide an architectural backbone to guide future development. © 2024, CC BY.

关键词： Trapped ions

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All-Photonic Artificial Neural Network Processor Via Nonlinear Optics

All-Photonic Artificial Neural Network Processor Via Nonline...

引用

Conference on Lasers and Electro-Optics (CLEO)

作者： Jasvith Raj Basani Stefan Krastanov Mikkel Heuck Dirk R. Englund Department of Electrical and Computer Engineering Institute for Research in Electronics and Applied Physics and Joint Quantum Institute University of Maryland College Park MD USA Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge Massachusetts USA DTU Fotonik Technical University of Denmark Lyngby Denmark

We propose an all-photonic architecture to accelerate linear matrix processing by encoding information in the amplitudes of frequency states. Our design is unique in providing a unitary, reversible mode of computation... 详细信息

ISBN: (数字)9781957171050

ISBN: (纸本)9781665466660

关键词： computer architecture Artificial neural networks Lasers and electrooptics Laser modes Encoding Nonlinear optics Electrooptical waveguides

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First results of pulsar observations with the LST-1 38

First results of pulsar observations with the LST-1

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38th International Cosmic Ray Conference, ICRC 2023

作者： Mas-Aguilar, Álvaro Brunelli, Giulia Ceribella, Giovanni López-Moya, Marcos López-Coto, Rubén Abe, K. Abe, S. Aguasca-Cabot, A. Agudo, I. Alvarez Crespo, N. Antonelli, L.A. Aramo, C. Arbet-Engels, A. Arcaro, C. Artero, M. Asano, K. Aubert, P. Baktash, A. Bamba, A. Baquero Larriva, A. Baroncelli, L. Barres de Almeida, U. Barrio, J.A. Batkovic, I. Baxter, J. Becerra González, J. Bernardini, E. Bernardos, M.I. Bernete Medrano, J. Berti, A. Bhattacharjee, P. Biederbeck, N. Bigongiari, C. Bissaldi, E. Blanch, O. Bonnoli, G. Bordas, P. Brunelli, G. Bulgarelli, A. Burelli, I. Burmistrov, L. Buscemi, M. Cardillo, M. Caroff, S. Carosi, A. Carrasco, M.S. Cassol, F. Cauz, D. Cerasole, D. Ceribella, G. Chai, Y. Cheng, K. Chiavassa, A. Chikawa, M. Chytka, L. Cifuentes, A. Contreras, J.L. Cortina, J. Costantini, H. Dalchenko, M. Dazzi, F. De Angelis, A. de Bony de Lavergne, M. De Lotto, B. De Lucia, M. de Menezes, R. Del Peral, L. Deleglise, G. Delgado, C. Delgado Mengual, J. della Volpe, D. Dellaiera, M. Di Piano, A. Di Pierro, F. Di Pilato, A. Di Tria, R. Di Venere, L. Díaz, C. Dominik, R.M. Dominis Prester, D. Donini, A. Dorner, D. Doro, M. Eisenberger, L. Elsässer, D. Emery, G. Escudero, J. Fallah Ramazani, V. Ferrara, G. Ferrarotto, F. Fiasson, A. Foffano, L. Freixas Coromina, L. Fröse, S. Fukami, S. Fukazawa, Y. Garcia, E. Garcia López, R. Gasbarra, C. Gasparrini, D. Geyer, D. Giesbrecht Paiva, J. Giglietto, N. Giordano, F. Gliwny, P. Godinovic, N. Grau, R. Green, J. Green, D. Gunji, S. Günther, P. Hackfeld, J. Hadasch, D. Hahn, A. Hashiyama, K. Hassan, T. Hayashi, K. Heckmann, L. Heller, M. Herrera Llorente, J. Hirotani, K. Hoffmann, D. Horns, D. Houles, J. Hrabovsky, M. Hrupec, D. Hui, D. Hütten, M. Iarlori, M. Imazawa, R. Inada, T. Inome, Y. Ioka, K. Iori, M. Ishio, K. Jimenez Martinez, I. Jurysek, J. Kagaya, M. Karas, V. Katagiri, H. Kataoka, J. Kerszberg, D. Kobayashi, Y. Kohri, K. Kong, A. Kubo, H. Kushida, J. Lainez, M. Lamanna, G. Lamastra, A. IPARCOS Department of EMFTEL Universidad Complutense de Madrid MadridE-28040 Spain INAF-OAS Università di Bologna Bologna40129 Italy Instituto de Astrofísica de Andalucía-CSIC Glorieta de la Astronomía s/n Granada18008 Spain Max-Planck-Institut for Physics Munich80805 Germany Department of Physics Tokai University Japan Institute for Cosmic Ray Research University of Tokyo Japan Departament de Física Quàntica i Astrofísica Institut de Ciències del Cosmos Universitat de Barcelona IEEC-UB Spain INAF Osservatorio Astronomico di Roma Italy INFN Sezione di Napoli Italy Max-Planck-Institut für Physik Germany INFN Sezione di Padova Università degli Studi di Padova Italy The Barcelona Institute of Science and Technology Spain LAPP Univ. Grenoble Alpes Univ. Savoie Mont Blanc CNRS-IN2P3 Annecy France Universität Hamburg Institut für Experimentalphysik Germany Graduate School of Science University of Tokyo Japan Universidad del Azuay Ecuador INAF Osservatorio di Astrofisica e Scienza dello spazio di Bologna Italy Centro Brasileiro de Pesquisas Físicas Brazil Instituto de Astrofísica de Canarias Departamento de Astrofísica Universidad de La Laguna Spain CIEMAT Spain Department of Physics TU Dortmund University Germany INFN Sezione di Bari Politecnico di Bari Italy INAF Osservatorio Astronomico di Brera Italy INFN Sezione di Trieste Università degli Studi di Udine Italy University of Geneva Département de physique nucléaire et corpusculaire Switzerland INFN Sezione di Catania Italy Italy Aix Marseille Univ CNRS IN2P3 CPPM France INFN Sezione di Bari Università di Bari Italy INFN Sezione di Torino Italy Palacky University Olomouc Faculty of Science Czech Republic University of Alcalá UAH Spain Port d’Informació Científica Spain University of Rijeka Department of Physics Croatia Institute for Theoretical Physics and Astrophysics Universität Würzburg Germany Institut für Theoretische Physik Lehrstuhl IV: Plasma-Astroteilchenphysik Ruhr-Universität B

After the discovery of Crab, Vela, and Geminga pulsars at Very High Energies, the search for new pulsars at tens of GeV has been gaining huge importance. However, their steep spectra along with the sensitivity of the current generation of Imaging Atmospheric Cherenkov telescopes (IACTs) are limiting the capability to detect more pulsars. The LST-1 is the first prototype of the Large-Sized Telescope of the forthcoming CTA observatory with enhanced sensitivity at tens of GeV. The LST-1 started its commissioning phase in 2018, and since then it has observed the Crab pulsar regularly. Here, we show the first results of the analysis of the Crab and other pulsars taken with the LST-1. The two characteristic emission peaks of the Crab pulsar, P1, and P2, are detected with high significance showing a clear improvement in sensitivity over the previous generation of IACTs. The spectrum is reconstructed up to 450 GeV for P1 and up to 700 GeV for P2. The low energy threshold of LST-1 also allows us to measure the spectrum of the Crab pulsar in the overlapping region with the Fermi-LAT and cross-calibrate both instruments. The results obtained with the first pulsar observations with the LST-1 confirm the excellent potential of LST telescopes to study and discover new pulsars in the near future. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Shellfish

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A New General Class of Systems of Elliptic Quasi-Variational-Hemivariational Inequalities

SSRN

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SSRN 2023年

作者： Migórski, Stanislaw Ogorzaly, Justyna Dudek, Sylwia College of Applied Mathematics Chengdu University of Information Technology Sichuan Province Chengdu610225 China Jagiellonian University in Krakow Chair of Optimization and Control ul. Lojasiewicza 6 Krakow30348 Poland Department of Mathematics Krakow University of Economics ul. Rakowicka 27 Krakow31510 Poland Department of Applied Mathematics Faculty of Computer Science and Telecommunications Krakow University of Technology ul. Warszawska 24 Krakow31155 Poland

In this paper we study a general class of systems of strongly coupled quasivariational-hemivariational inequalities with implicit constraints in reflexive Banach spaces. Each inequality contains a convex potential, a locally Lipschitz superpotential, and a implicit obstacle set. The solvability of the system is established based on a fixed point approach, monotonicity arguments, and nonsmooth analysis. The result generalizes several theorems on various particular cases on variational, variationalhemivariational, and quasi-variational inequalities. We illustrate the applicability of the abstract theory by a nonlinear static thermoelastic frictional contact problem with implicit obstacles for which we provide existence and regularity results. © 2023, The Authors. All rights reserved.

关键词： Variational techniques

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Investigation of structural, morphology, optical properties and electrical transport conduction of Li0.25Na0.75CdVO4compound 2

Investigation of structural, morphology, optical properties ...

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2nd International Conference on Materials, Laser science and applied physics, ICMLAP 2020

作者： Enneffatia, M. Rasheed, M. Louatia, B. Guidaraa, K. Shihab, S. Barillé, R. Laboratory of Spectroscopic Characterization and Optic Materials University of Sfax Faculty of Sciences B.P. 1171 Sfax3000 Tunisia Department of Physics Faculty of Science Taif University Saudi Arabia MOLTECH-Anjou Photonics Laboratory Angers University 2 Bd. Lavoisier Angers49045 France Applied Sciences Department University of Technology Baghdad Iraq

Polycrystalline Li0.25Na0.75CdVO4 was synthesized via a solid-state technique under air atmosphere. It is found that X-ray diffraction peaks are listed as orthorhombic Na2CrO4 structure belonging to the space group Cmcm. Composition of elements was examined by energy dispersive X-ray analysis (EDX or EDS). Grains size and morphology of the present material were investigated by scanning electron microscopy (MEB) and atomic force microscopy (AFM). Electrical measurements were performed using complex impedance spectroscopy. Impedance curves confirm the presence of two contributions and an equivalent circuit was suggested. An electrical transport in the material as a thermally activated process has been achieved using DC conductivity. While;AC conductivity is analyzed by the non-overlapping small polar on tunneling (NSPT) conduction mechanism. Refractive index, extinction coefficient, and band gap energy were determined from ellipsometric measurements. © Published under licence by IOP Publishing Ltd.

关键词： Atomic force microscopy

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