检索结果-内蒙古大学图书馆

Magnetic Excitations in Strained Infinite-layer Nickelate PrNiO2

学校读者我要写书评

暂无评论

arXiv 2022年

作者： Gao, Qiang Fan, Shiyu Wang, Qisi Li, Jiarui Ren, Xiaolin Bialo, Izabela Drewanowski, Annabella Rothenbühler, Pascal Choi, Jaewon Wang, Yao Xiang, Tao Hu, Jiangping Zhou, Ke-Jin Bisogni, Valentina Comin, Riccardo Chang, J. Pelliciari, Jonathan Zhou, X.J. Zhu, Zhihai Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing100190 China National Synchrotron Light Source II Brookhaven National Laboratory UptonNY11973 United States Physik-Institut Universität Zürich Winterthurerstrasse 190 ZürichCH-8057 Switzerland Department of Physics Massachusetts Institute of Technology CambridgeMA02139 United States University of Chinese Academy of Sciences Beijing100049 China AGH University of Science and Technology Faculty of Physics and Applied Computer Science Kraków30-059 Poland Diamond Light Source Harwell Campus DidcotOX11 0DE United Kingdom Department of Physics and Astronomy Clemson University ClemsonSC29631 United States Beijing Academy of Quantum Information Sciences Beijing100193 China Songshan Lake Materials Laboratory Dongguan523808 China

Strongly correlated materials often respond sensitively to the external perturbations. In the recently discovered superconducting infinite-layer nickelates, the superconducting transition temperature can be dramatically enhanced via only ~1% compressive strain-tuning enabled by substrate design. However, the root of such enhancement remains elusive. While the superconducting pairing mechanism is still not settled, magnetic Cooper pairing - similar to the cuprates has been proposed. Using resonant inelastic x-ray scattering, we investigate the magnetic excitations in infinite-layer PrNiO2 thin films for different strain conditions. The magnon bandwidth of PrNiO2 shows only marginal response to strain-tuning, in sharp contrast to the striking enhancement of the superconducting transition temperature Tc in the doped superconducting samples. These results suggest the enhancement of Tc is not mediated by spin excitations and thus provide important empirics for the understanding of superconductivity in infinite-layer nickelates. © 2022, CC BY.

关键词： Praseodymium compounds

Production of hydrogen isotopes and charged pions in p (3.5 GeV) + Nb93 reactions

学校读者我要写书评

暂无评论

Physical Review C 2023年第6期108卷 064902-064902页

作者： R. Abou Yassine O. Arnold M. Becker P. Bergmann A. Blanco C. Blume M. Böhmer N. Carolino L. Chlad P. Chudoba I. Ciepał J. Dreyer W. A. Esmail L. Fabbietti P. Fonte J. Friese I. Fröhlich T. Galatyuk J. A. Garzón M. Grunwald M. Gumberidze S. Harabasz C. Höhne F. Hojeij R. Holzmann H. Huck M. Idzik B. Kämpfer B. Kardan V. Kedych I. Koenig W. Koenig M. Kohls G. Korcyl G. Kornakov F. Kornas R. Kotte W. Krueger A. Kugler T. Kunz R. Lalik L. Lopes M. Lorenz A. Malige J. Markert V. Metag J. Michel A. Molenda C. Müntz L. Naumann K. Nowakowski J.-H. Otto Y. Parpottas M. Parschau V. Pechenov O. Pechenova J. Pietraszko A. Prozorov W. Przygoda K. Pysz B. Ramstein N. Rathod A. Rost A. Rustamov P. Salabura N. Schild E. Schwab F. Seck U. Singh S. Spies M. Stefaniak H. Ströbele J. Stroth C. Sturm K. Sumara O. Svoboda M. Szala P. Tlusty M. Traxler H. Tsertos V. Wagner A. A. Weber C. Wendisch H. P. Zbroszczyk E. Zherebtsova and P. Zumbruch B. Kamys S. Sharma Institut für Kernphysik Technische Universität Darmstadt 64289 Darmstadt Germany Laboratoire de Physique des 2 infinis Iréne Joliot-Curie Université Paris-Saclay CNRS-IN2P3. F-91405 Orsay France Physik Department E62 Technische Universität München 85748 Garching Germany Excellence Cluster 'Origin and Structure of the Universe' 85748 Garching Germany II. Physikalisches Institut Justus Liebig Universität Giessen 35392 Giessen Germany GSI Helmholtzzentrum für Schwerionenforschung GmbH 64291 Darmstadt Germany LIP-Laboratório de Instrumentação e Física Experimental de Partículas 3004-516 Coimbra Portugal Institut für Kernphysik Goethe-Universität 60438 Frankfurt Germany Nuclear Physics Institute The Czech Academy of Sciences 25068 Rez Czech Republic Institute of Nuclear Physics Polish Academy of Sciences 31342 Kraków Poland Institut für Strahlenphysik Helmholtz-Zentrum Dresden-Rossendorf 01314 Dresden Germany LabCAF. F. Física Univ. de Santiago de Compostela 15706 Santiago de Compostela Spain Warsaw University of Technology Faculty of Physics 00-662 Warsaw Poland AGH University of Science and Technology Faculty of Physics and Applied Computer Science 30-059 Kraków Poland Smoluchowski Institute of Physics Jagiellonian University of Cracow 30-059 Kraków Poland Department of Mechanical Engineering Frederick University 1036 Nicosia Cyprus Department of Physics University of Cyprus 1678 Nicosia Cyprus

The double-differential production cross sections d2σ/dΩdE for hydrogen isotopes and charged pions in the reaction of p+Nb93 at 3.5 GeV proton beam energy have been measured by the high-acceptance dielectron spectrometer (HADES). Thanks to the high acceptance of HADES at forward emission angles and the use of its magnetic field, the measured energy range of hydrogen isotopes could be significantly extended in comparison with the relatively scarce experimental data available in the literature. The data provide information about the development of the intranuclear cascade in the proton-nucleus collisions. They can as well be utilized to study the rate of energy or momentum dissipation in the nuclear systems and the mechanism of elementary and composite particle production in excited nuclear matter at normal density. Data of this type are important also for technological and medical applications. Our results are compared with models developed to describe the processes relevant to nuclear spallation (incl++) or oriented to probe either the elementary hadronic processes in nuclear matter or the behavior of compressed nuclear matter (gibuu).

关键词： Charged-particle multiplicity Cosmology Low & intermediate energy heavy-ion reactions Nuclear fragmentation Nuclear reactions Nuclear structure & decays Nucleon induced nuclear reactions Nucleon-nucleon interactions Particle & resonance production Relativistic heavy-ion collisions Thermal & statistical models A ≤ 5

Rydberg states of the CdAr van der Waals complex

学校读者我要写书评

暂无评论

Physical Review A 2019年第5期99卷 052510-052510页

作者： Marek Krośnicki Andrzej Kędziorski Tomasz Urbańczyk Jarosław Koperski Smoluchowski Institute of Physics Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Łojasiewcza 11 30-348 Kraków Poland

A theoretical study of the relatively unexplored area of low-lying Rydberg states of van der Waals molecules (vdW) in the particular case of the CdAr system is presented. The fully ab initio calculation of the potential energy curves (PECs) of the excited vdW complex CdAr above the (5s6s)S13,S01 atomic asymptotes, reaching the (5s6p)P0,1,23, (5s5d)D21,3D1,2,3, (5s6p)P11, and (5s7s)S13,S01, is performed. All the calculated PECs of the Rydberg states of Σ symmetry exhibit undulations resulting in the double-well character that was already observed experimentally in the case of the lowest Rydberg states of various 12 group metal–rare gas vdW complexes. The outer wells obtained within the present work are shallow with depths not exceeding 20 cm−1 below the atomic asymptote and reaching equilibrium distance of roughly 27 bohr in the case of states correlating with the (5s7s)S13,S01 asymptotes. The largest calculated values of permanent electric dipoles at equilibrium distances exceed 10 D in the case of 1Σ Rydberg states correlating with (5s6p)P11 and (5s5d)D21 atomic asymptotes. The calculations were performed within the second-order multireference perturbation theory. The performance of this particular theoretical ab initio approach is discussed in the context of the considered type of systems and compared, wherever it was possible, with the benchmark results of the coupled-cluster method obtained in this work, with other ab initio calculations based on multireference perturbation theory and experimental data.

关键词： Atomic & molecular structure Electronic structure of atoms & molecules Electronic transitions Molecular spectra Potential energy surfaces Van der Waals interaction

Nonlocality in photonic materials and metamaterials: roadmap

学校读者我要写书评

暂无评论

Optical Materials Express 2025年第7期15卷 1544-1709页

作者： Francesco Monticone N Asger Mortensen Antonio I Fernández-Domínguez Yu Luo Xuezhi Zheng Christos Tserkezis Jacob B Khurgin Tigran V Shahbazyan André J Chaves Nuno M R Peres Gino Wegner Kurt Busch Huatian Hu Fabio Della Sala Pu Zhang Cristian Ciracì Javier Aizpurua Antton Babaze Andrei G Borisov Xue-Wen Chen Thomas Christensen Wei Yan Yi Yang Ulrich Hohenester Lorenz Huber Martijn Wubs Simone De Liberato P A D Gonçalves F Javier García de Abajo Ortwin Hess Illya Tarasenko Joel D Cox Line Jelver Eduardo J C Dias Miguel Sánchez Sánchez Dionisios Margetis Guillermo Gómez-Santos Igor M Vasilevskiy Tobias Stauber Sergei Tretyakov Constantin Simovski Samaneh Pakniyat J Sebastián Gómez-Díaz Igor V Bondarev Svend-Age Biehs Alexra Boltasseva Vladimir M Shalaev Alexey V Krasavin Anatoly V Zayats Andrea Alù Jung-Hwan Song Mark L Brongersma Uriel Levy Olivia Y Long Cheng Guo Shanhui Fan Sergey I Bozhevolnyi Adam Overvig Filipa R Prudêncio Mário G Silveirinha S Ali Hassani Gangaraj Christos Argyropoulos Paloma A Huidobro Emanuele Galiffi Fan Yang John B Pendry David A B Miller School of Electrical and Computer Engineering Cornell University Ithaca New York 14853 USA POLIMA—Center for Polariton-driven Light-Matter Interactions University of Southern Denmark Campusvej 55 DK-5230 Odense M Denmark D-IAS—Danish Institute for Advanced Study University of Southern Denmark Campusvej 55 DK-5230 Odense M Denmark Departamento de Física Teórica de la Materia Condensada Universidad Autónoma de Madrid E-28049 Madrid Spain Condensed Matter Physics Center (IFIMAC) Universidad Autónoma de Madrid E-28049 Madrid Spain School of Electrical and Electronic Engineering Nanyang Technological University Singapore 639798 Singapore Key Laboratory of Radar Imaging and Microwave Photonics Ministry of Education College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics Nanjing 211106 China WaveCoRE Division Department of Electrical Engineering KU Leuven Leuven B-3001 Belgium Department of Electrical and Computer Engineering Johns Hopkins University Baltimore Maryland 21218 USA Department of Physics Jackson State University Jackson Mississippi 39217 USA Department of Physics Aeronautics Institute of Technology 12228-900 So Jos dos Campos SP Brazil Centro de Física (CF-UM-UP) and Departamento de Física Universidade do Minho P-4710-057 Braga Portugal International Iberian Nanotechnology Laboratory (INL) Av Mestre José Veiga 4715-330 Braga Portugal Max-Born-Institut 12489 Berlin Germany Humboldt-Universität zu Berlin Institut für Physik AG Theoretische Optik and Photonik 12489 Berlin Germany Center for Biomolecular Nanotechnologies Istituto Italiano di Tecnologia Via Barsanti 14 73010 Arnesano Italy Institute for Microelectronics and Microsystems (CNR-IMM) Via Monteroni Campus Unisalento 73100 Lecce Italy School of Physics Huazhong University of Science and Technology Luoyu Road 1037 Wuhan 430074 China Donostia International Physics Center DIPC 20018 Donostia-San Sebastián Spain Ikerbasque Basque Foundation fo

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 adopted in optical material modeling. 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 metasurfaces, in particular, nonlocality engineering has emerged as 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 and metamaterials, highlight new opportunities and open challenges, and chart new pathways that will drive this emerging field forward—toward new scientific discoveries and technological *** by Optica Publishing Group under the terms of the Creative Commons Attribution 4.0 License . Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

关键词： Chemical elements Localized surface plasmon resonance Material properties Near field scanning optical microscopy Optical materials Thin films

Wounded nucleon, quark, and quark-diquark emission functions versus experimental results from the BNL Relativistic Heavy Ion Collider at sNN=200 GeV

学校读者我要写书评

暂无评论

Physical Review C 2019年第6期100卷 064902-064902页

作者： Michał Barej Adam Bzdak Paweł Gutowski AGH University of Science and Technology Faculty of Physics and Applied Computer Science Kraków 30-059 Poland

Using the wounded nucleon, quark, and quark-diquark models, we extract the wounded source emission functions from the PHOBOS data for d+Au collisions at sNN=200 GeV. We apply these functions to compute charged particle multiplicity distributions as functions of pseudorapidity for p+p, p+Al, p+Au, d+Au, He3+Au, Cu+Cu, Cu+Au, Au+Au, and U+U collisions at the same energy and compare them with experimental data from the PHOBOS and PHENIX Collaborations. In symmetric collisions of heavy nuclei, the obtained distributions differ among the tested models. On the other hand, in asymmetric collisions, all three models give essentially the same distributions. The wounded quark-diquark and quark models are in reasonable agreement with data for all the investigated systems.

关键词： Nucleon induced nuclear reactions Particle & resonance production Relativistic heavy-ion collisions

Confident entanglement detection via separable numerical range

学校读者我要写书评

暂无评论

arXiv 2021年

作者： Simnacher, Timo Czartowski, Jakub Szymanśki, Konrad Zyczkowski, Karol Naturwissenschaftlich-Technische Fakultät Universität Siegen Walter-Flex-Str. 3 SiegenD-57068 Germany Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University ul. Lojasiewicza 11 Kraków30-348 Poland Center for Theoretical Physics Polish Academy of Sciences al. Lotników 32/46 Warszawa02-668 Poland

We investigate the joint (separable) numerical range of multiple measurements, i.e., the regions of expectation values accessible with (separable) quantum states for given observables. This not only enables efficient entanglement detection, but also sheds light on the geometry of the set of quantum states. More precisely, in an experiment, if the confidence region for the obtained data and the separable numerical range are disjoint, entanglement is reliably detected. Generically, the success of such an experiment is more likely the smaller the separable numerical range is compared to the standard numerical range of the observables measured. We quantify this relation using the ratio between these two volumes and show that it cannot be arbitrarily small, giving analytical bounds for any number of particles, local dimensions as well as number of measurements. Moreover, we explicitly compute the volume of separable and standard numerical range for two locally traceless two-qubit product observables, which are of particular interest as they are easier to measure in practice. Furthermore, we consider typical volume ratios for generic observables and extreme *** Codes 47A12 Copyright © 2021, The Authors. All rights reserved.

关键词： Quantum entanglement

Distribution of genuine high-dimensional entanglement over 10.2 km of noisy metropolitan atmosphere

学校读者我要写书评

暂无评论

arXiv 2023年

作者： Bulla, Lukas Hjorth, Kristian Kohout, Oskar Lang, Jan Ecker, Sebastian Neumann, Sebastian P. Bittermann, Julius Kindler, Robert Huber, Marcus Bohmann, Martin Ursin, Rupert Pivoluska, Matej Austrian Academy of Sciences Boltzmanngasse 3 Vienna1090 Austria Faculty of Physics University of Vienna Boltzmanngasse 5 Vienna1090 Austria TrondheimNO-7491 Norway Fraunhofer Institute for Applied Optics and Precision Engineering IOF Albert-Einstein-Strasse 7 Jena07745 Germany Friedrich-Schiller-Universität Jena FSU Fürstengraben 1 Jena07743 Germany Atominstitut Technische Universität Wien Stadionallee 2 Vienna1020 Austria Quantum Technology Laboratories GmbH-qtlabs Clemens-Holzmeister-Straße 6/6 Vienna1100 Austria Institute of Computer Science Masaryk University Brno602 00 Czech Republic Institute of Physics Slovak Academy of Sciences Bratislava845 11 Slovakia

In a recent quantum key distribution experiment, high-dimensional protocols were used to show an improved noise resistance over a 10.2 km free-space channel. One of the unresolved questions in this context is whether the communicating parties actually shared genuine high-dimensional entanglement. In this letter we introduce an improved discretisation and entanglement certification scheme for high-dimensional time-bin setups and apply it to the data obtained during the experiment. Our analysis answers the aforementioned question affirmatively and thus the experiment constitutes the first transmission of genuine high-dimensional entanglement in a single degree of freedom over a long-range free-space channel. Copyright © 2023, The Authors. All rights reserved.

关键词： Quantum cryptography

When invariable cross-sections change: The electron-ion collider case

学校读者我要写书评

暂无评论

arXiv 2020年

作者： Piotrzkowski, Krzysztof Przybycien, Mariusz Université Catholique de Louvain Centre for Cosmology Particle Physics and Phenomenology Louvain-la-Neuve1348 Belgium AGH University of Science and Technology Faculty of Physics and Applied Computer Science Al. Mickiewicza 30 Kraków30-059 Poland

In everyday research, it is tacitly assumed that the scattering cross-sections have fixed values for the given particle species, centre-of-mass energy, and particle polarizations. However, this assumption has been called into question after several observations of suppression of high-energy bremsstrahlung. This process will play a major role in experiments at the future Electron-Ion Collider, and we show here how variations of the bremsstrahlung cross-section can be profoundly studied there using the lateral beam displacements. In particular, we predict very strong increase of the observed cross-sections for large beam separations. We also discuss the relation of these elusive effects to other quantum phenomena occurring over macroscopic distances. In this context, spectacular and possibly useful properties of the coherent bremsstrahlung at the EIC are also evaluated. Copyright © 2020, The Authors. All rights reserved.

关键词： Quantum interference phenomena

Subexponential-time algorithms for finding large induced sparse subgraphs 14

学校读者我要写书评

暂无评论

Subexponential-time algorithms for finding large induced spa...

14th International Symposium on Parameterized and Exact Computation, IPEC 2019

作者： Novotná, Jana Okrasa, Karolina Pilipczuk, Michal Rzążewski, Pawel Van Leeuwen, Erik Jan Walczak, Bartosz Department of Applied Mathematics Faculty of Mathematics and Physics Charles University Prague Czech Republic Faculty of Mathematics and Information Science Warsaw University of Technology Poland Institute of Informatics Faculty of Mathematics Informatics and Mechanics University of Warsaw Poland Department of Information and Computing Sciences Utrecht University Netherlands Department of Theoretical Computer Science Faculty of Mathematics and Computer Science Jagiellonian University Kraków Poland

ISBN: (纸本)9783959771290

Let C and D be hereditary graph classes. Consider the following problem: given a graph G ∈ D, find a largest, in terms of the number of vertices, induced subgraph of G that belongs to C. We prove that it can be solved in 2o(n) time, where n is the number of vertices of G, if the following conditions are satisfied: the graphs in C are sparse, i.e., they have linearly many edges in terms of the number of vertices;the graphs in D admit balanced separators of size governed by their density, e.g., O(∆) or O(√m), where ∆ and m denote the maximum degree and the number of edges, respectively;and the considered problem admits a single-exponential fixed-parameter algorithm when parameterized by the treewidth of the input graph. This leads, for example, to the following corollaries for specific classes C and D: a largest induced forest in a Pt-free graph can be found in 2Õ(n2/3) time, for every fixed t;and a largest induced planar graph in a string graph can be found in 2Õ(n3/4) time. © Jana Novotná, Karolina Okrasa, Michal Pilipczuk, Pawel Rzążewski, Erik Jan van Leeuwen, and Bartosz Walczak;licensed under Creative Commons License CC-BY.

关键词： Graphic methods