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International Conference on Modern Problems of Radio engineering, Telecommunications and computer science

作者： Oleksandr Yanchuk Oleg V. Marchuk Galyna Myronchuk Iryna A. Moroz Nazariy Andrushchak Oleksii A. Vyshnevskyi Iwan V. Kityk Andriy V. Kityk Katarzyna Ozga Jaroslaw Jedryka Artur Wojciechowski Anatoliy Andrushchak Department of Inorganic and Physical Chemistry Lesya Ukrainka Eastern European National University Lutsk Ukraine Department of Materials Science Lutsk National Technical University Lutsk Ukraine Department of Computer-Aided Design Systems Lviv Polytechnic National University Lviv Ukraine M. P. Semenenko Institute of Geochemistry Mineralogy and Ore Formation NAS of Ukraine Kyiv Ukraine Faculty of Electrical Engineering Czestochowa University of Technology Czestochowa Poland Department of Telecommunication Lviv Polytechnic National University Lviv Ukraine

ISBN: (数字)9781728155661

ISBN: (纸本)9781728155678

We report the synthesis, structure and nonlinear optical properties of cadmium sulphide (CdS) nanocrystallines (NCs) synthesized electrochemically both with and without detergent ATLAS G3300. Relevant structural and morphological features are explored by X-ray diffraction and scanning electron microscopy (SEM) techniques. The efficiency of the second harmonic generation (SHG) appears to be strongly dependent on the energy density of the incident fundamental laser radiation and NC sizes.

关键词： chalcogenides nanocrystalline CdS SEM XRD SHG Second-harmonic generation Nonlinear optical properties Chalcogenides Nanocrystalline Scanning Electron Microscope X-ray diffraction energy density Laser radiation

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Creating and manipulating a Laughlin-type ν = 1/3 fractional quantum Hall state on a quantum computer with linear depth circuits

arXiv

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arXiv 2020年

作者： Rahmani, Armin Sung, Kevin J. Putterman, Harald Roushan, Pedram Ghaemi, Pouyan Jiang, Zhang Department of Physics and Astronomy and Advanced Materials Science and Engineering Center Western Washington University BellinghamWA98225 United States Kavli Institute for Theoretical Physics University of California Santa BarbaraCA93106 United States Google AI Quantum Santa BarbaraCA United States Department of Electrical Engineering and Computer Science University of Michigan Ann ArborMI48109 United States Physics Department City College of the City University of New York New YorkNY10031 United States Graduate Center of the City University of New York New YorkNY10016 United States

Here we present an efficient quantum algorithm to generate an equivalent many-body state to Laughlin’s ν = 1/3 fractional quantum Hall state on a digitized quantum computer. Our algorithm only uses quantum gates acting on neighboring qubits in a quasi one-dimensional setting, and its circuit depth is linear in the number of qubits, i.e., the number of Landau orbitals in the second quantized picture. We identify correlation functions that serve as signatures of the Laughlin state and discuss how to obtain them on a quantum computer. We also discuss a generalization of the algorithm for creating quasiparticles in the Laughlin state. This paves the way for several important studies, including quantum simulation of non-equilibrium dynamics and braiding of quasiparticles in quantum Hall states. Copyright © 2020, The Authors. All rights reserved.

关键词： Qubits

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Phenotate: crowdsourcing phenotype annotations as exercises in undergraduate classes (vol 12, pg 631, 2020)

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GENETICS IN MEDICINE 2020年第8期22卷 1427-1427页

作者： Chang, Willie H. Mashouri, Pouria Lozano, Alexander X. Johnstone, Brittney Husic, Mia Olry, Annie Maiella, Sylvie Balci, Tugce B. Sawyer, Sarah L. Robinson, Peter N. Rath, Ana Brudno, Michael Centre for Computational Medicine The Hospital For Sick Children Toronto ON Canada Department of Computer Science Princeton University Princeton NJ USA Faculty of Medicine University of Toronto Toronto ON Canada Department of Materials Science & Engineering Stanford University Stanford CA USA Sunnybrook Health Sciences Centre Toronto ON Canada Orphanet Institut national de la santé et de la recherche médicale Paris France Medical Genetics Program of Southwestern Ontario London Health Sciences Centre London ON Canada Department of Genetics Children’s Hospital of Eastern Ontario and Children’s Hospital of Eastern Ontario Research Institute University of Ottawa Ottawa ON Canada The Jackson Laboratory for Genomic Medicine Farmington CT USA Institute for Systems Genomics University of Connecticut Farmington CT USA Department of Computer Science University of Toronto Toronto ON Canada Genetics and Genome Biology Program The Hospital for Sick Children Toronto ON Canada University Health Network Toronto ON Canada

PurposeComputational documentation of genetic disorders is highly reliant on structured data for differential diagnosis, pathogenic variant identification, and patient matchmaking. However, most information on rare diseases (RDs) exists in freeform text, such as academic literature. To increase availability of structured RD data, we developed a crowdsourcing approach for collecting phenotype information using student *** developed Phenotate, a web application for crowdsourcing disease phenotype annotations through assignments for undergraduate genetics students. Using student-collected data, we generated composite annotations for each disease through a machine learning approach. These annotations were compared with those from clinical practitioners and gold standard curated *** Phenotate in five undergraduate genetics courses, we collected annotations for 22 diseases. Student-sourced annotations showed strong similarity to gold standards, with F-measures ranging from 0.584 to 0.868. Furthermore, clinicians used Phenotate annotations to identify diseases with comparable accuracy to other annotation sources and gold standards. For six disorders, no gold standards were available, allowing us to create some of the first structured annotations for them, while students demonstrated ability to research *** enables crowdsourcing RD phenotypic annotations through educational assignments. Presented as an intuitive web-based tool, it offers pedagogical benefits and augments the computable RD knowledgebase.

关键词： rare diseases phenotype crowdsourcing medical education machine learning

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Toward Complete Transformation of Sodium Polysulfides by Regulating the Second-Shell Coordinating Environment of Atomically Dispersed Fe

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Angewandte Chemie 2023年第26期135卷

作者： Ruilin Bai Qiaosong Lin Xinyu Li Fangxin Ling Huijuan Wang Sha Tan Lingxiang Hu Mingze Ma Prof. Xiaojun Wu Yu Shao Xianhong Rui Prof. Enyuan Hu Dr. Yu Yao Prof. Yan Yu Hefei National Research Center for Physical Sciences at the Microscale Department of Materials Science and Engineering CAS Key Laboratory of Materials for Energy Conversion University of Science and Technology of China Hefei Anhui 230026 China Contribution: Conceptualization (lead) Writing - original draft (lead) State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 Liaoning China University of Chinese Academy of Sciences Beijing 100049 China Contribution: Data curation (lead) Contribution: Formal analysis (equal) Contribution: Investigation (lead) Experimental Center of Engineering and Material Science University of Science and Technology of China Hefei 230026 China Contribution: Methodology (equal) Chemistry Division Brookhaven National Laboratory Upton NY USA Contribution: Resources (equal) Department of Electrical Engineering and Computer Science Institut Polytechnique de Paris 91120 Palaiseau Île-de-France France Contribution: Software (equal) Contribution: Data curation (equal) Jiujiang DeFu Technology Co. Ltd. Jiujiang Jiangxi 332000 (P. R. China School of Materials and Energy Guangdong University of Technology Guangzhou 510006 China Contribution: Validation (lead) Contribution: Methodology (lead) Contribution: Writing - review & editing (lead) National Synchrotron Radiation Laboratory Hefei Anhui 230026 China Contribution: Project administration (lead) Writing - review & editing (lead)

Room temperature sodium-sulfur (RT Na-S) batteries are highly competitive as potential energy storage devices. Nevertheless, their actually achieved reversible capacities are far below the theoretical value due to incomplete transformation of polysulfides. Herein, atomically dispersed Fe-N/S active center by regulating the second-shell coordinating environment of Fe single atom is proposed. The Fe−N 4 S 2 coordination structure with enhanced local electronic concentration around the Fermi level is revealed via synchrotron radiation X-ray absorption spectroscopy (XAS) and theoretical calculations, which can not only significantly promote the transformation kinetics of polysulfides, but induce uniform Na deposition for dendrite-free Na anode. As a result, the obtained S cathode delivers a high initial reversible capacity of 1590 mAh g −1 , nearly the theoretical value. This work opens up a new avenue to facilitate the complete transformation of polysulfides for RT Na-S batteries.

关键词： Catalysis Coordinating Environment Fe Single Atom RT Na-S Batteries Transformation Kinetics

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Tailoring the thermo-optic coefficient in silica optical fibers

Tailoring the thermo-optic coefficient in silica optical fib...

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Optical Fiber Sensors, OFS 2018

作者： Dragic, P. Cavillon, M. Kucera, C. Parsons, J. Hawkins, T. Ballato, J. Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign UrbanaIL61822 United States Center for Optical Materials Science and Engineering Technologies Clemson University ClemsonSC29625 United States

Compositional design of the thermo-optic coefficient of optical fiber is discussed. The influences of P2O5, B2O3, SrO, and F are presented. Phosphorus borosilicate compositions appear to be the most attractive for rea... 详细信息

ISBN: (纸本)9781943580507

关键词： Silica

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Tunable and enhanced Rashba spin-orbit coupling in iridate-manganite heterostructures

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Physical Review B 2020年第12期102卷 125145-125145页

作者： T. S. Suraj Ganesh Ji Omar Hariom Jani M. M. Juvaid Sonu Hooda Anindita Chaudhuri Andrivo Rusydi K. Sethupathi Thirumalai Venkatesan Ariando Ariando M. S. Ramachandra Rao Department of Physics Nano Functional Materials Technology Center Material Science Research Center Indian Institute of Technology Madras Chennai 600036 India Low Temperature Physics Lab Department of Physics Indian Institute of Technology Madras Chennai 600036 India Department of Physics National University of Singapore Singapore 117542 Singapore NUSNNI-NanoCore National University of Singapore Singapore 117411 Singapore National University of Singapore Graduate School for Integrative Sciences and Engineering (NGS) University Hall 21 Lower Kent Ridge Road Singapore 119077 Singapore Singapore Synchrotron Light Source National University of Singapore 5 Research Link Singapore 117603 Singapore Department of Electrical and Computer Engineering National University of Singapore Singapore 117576 Singapore

Tailoring spin-orbit interactions and Coulomb repulsion are the key features to observe exotic physical phenomena such as magnetic anisotropy and topological spin texture at oxide interfaces. Our study proposes a platform for engineering magnetism and spin-orbit coupling at the LaMnO3/SrIrO3 (3d−5d) oxide interface by tuning the LaMnO3 growth conditions, which controls the lattice displacement and spin-correlated interfacial coupling through charge transfer. We report a tunable and enhanced interface-induced Rashba spin-orbit coupling where the spin relaxation mechanism varies with magnetic behavior of the underlying LaMnO3 layer. The x-ray spectroscopy measurements reveal the quantitative valence states of Mn and their impact on charge transfer. Our angle-dependent magnetoresistance measurements also reflects the signature of magnetic proximity effect in SrIrO3 and can be tuned with the magnetic nature of LaMnO3 in a LaMnO3/SrIrO3 bilayer. Our work demonstrates a route to engineer the interface-induced Rashba spin-orbit coupling and magnetic proximity effect at the 3d−5d oxide interface for spintronics applications.

关键词： Magnetoresistance Rashba coupling Spin relaxation Spin-orbit coupling Interfaces Strongly correlated systems

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Epitaxial SrTiO3 film on silicon with narrow rocking curve despite huge defect density

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Physical Review materials 2019年第7期3卷 073403-073403页

作者： Z. Wang B. H. Goodge D. J. Baek M. J. Zachman X. Huang X. Bai C. M. Brooks H. Paik A. B. Mei J. D. Brock J-P. Maria L. F. Kourkoutis D. G. Schlom School of Applied and Engineering Physics Cornell University Ithaca New York 14853 USA Department of Materials Science and Engineering Cornell University Ithaca New York 14853 USA Kavli Institute at Cornell for Nanoscale Science Ithaca New York 14853 USA School of Electrical and Computer Engineering Cornell University Ithaca New York 14853 USA Cornell High Energy Synchrotron Source Cornell University Ithaca New York 14853 USA Platform for the Accelerated Realization Analysis and Discovery of Interface Materials (PARADIM) Cornell University Ithaca New York 14853 USA Penn State University Department of Materials Science and Engineering University Park Pennsylvania 16802 USA

The structural perfection and defect microstructure of epitaxial (001) SrTiO3 films grown on (001) Si was assessed by a combination of x-ray diffraction and scanning transmission electron microscopy. Conditions were identified that yield 002 SrTiO3 rocking curves with full width at half-maximum below 0.03° for films ranging from 2 to 300 nm thick, but this is because this particular peak is insensitive to the ∼8×1011cm–2 density of threading dislocations with pure edge character and extended defects containing dislocations and out-of-phase boundaries. Our results show that one narrow rocking curve peak is insufficient to characterize the structural perfection of epitaxial films.

关键词： Crystal growth High-resolution transmission electron microscopy Molecular beam epitaxy Reflection high-energy electron diffraction X-ray diffraction

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Low nonlinearity fibers

Low nonlinearity fibers

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Specialty Optical Fibers, SOF 2018

作者： Dragic, P. Cavillon, M. Kucera, C. Yu, N. Hawkins, T. Ballato, J. Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign UrbanaIL61822 United States Center for Optical Materials Science and Engineering Technologies Clemson University ClemsonSC29625 United States

Through judicious selection of glass composition, optical fibers with reduced susceptibility to deleterious light-matter interactions are achieved. The current state and future development of low nonlinearity fiber us... 详细信息

ISBN: (纸本)9781943580439

关键词： Glass

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A Multifunctional Molecular Modifier Enabling Efficient Large-Area Perovskite Light-Emitting Diodes

SSRN

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SSRN 2020年

作者： Wang, Haoran Gong, Xiwen Zhao, Dewei Zhao, Yong-Biao Wang, Sheng Zhang, Jianfeng Kong, Lingmei Wei, Bin Quintero-Bermudez, Rafael Voznyy, Oleksandr Shang, Yuequn Ning, Zhijun Yan, Yanfa Sargent, Edward H. Yang, Xuyong Shanghai University 149 Yanchang Road Shanghai 200072 China The Edward S. Rogers Sr. Department of Electrical and Computer Engineering University of Toronto 35 St. George Street TorontoONM5S 1A4 Canada Institute of Solar Energy Materials and Devices College of Materials Science and Engineering Sichuan University 24 South Section 1 Yihuan Road Chengdu610065 China Department of Physics and Astronomy Wright Center for Photovoltaics Innovation and Commercialization The University of Toledo OH Toledo43606 United States School of Physical Science and Technology ShanghaiTech University 393 Middle Huaxia Road Shanghai Pudong201210 China

With rapid progress in perovskite light-emitting diodes (PeLEDs), the electroluminescence performance of large-area perovskite devices is increasingly important. We investigate why large-area performance lags behind that achieved in laboratory-scale devices, and found that defects in perovskite films – emerging from thermal convection during solvent evaporation and electronic traps formed during perovskite crystallization – are chief causes. Here we report a molecular modification strategy that simultaneously eliminates pinholes in perovskite layers by controlling the dynamics of film formation, and passivates the defects in perovskites by incorporating Br species, thereby preventing shorts and non-radiative recombination. The molecular modifier 1,3,5-tris (bromomethyl) benzene (TBB) also modulates the electronic structure of injection/transport materials to achieve improved charge injection and balanced charge transport. As a result, we demonstrate a 20 mm × 20 mm green perovskite nanocrystal LED that achieves an external quantum efficiency (EQE) of over 16%, the record efficiency for large-area PeLEDs. Our work opens a route to scaling perovskite LEDs. © 2020, The Authors. All rights reserved.

关键词： Perovskite

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Quasielectrostatic Wave Propagation Beyond the Delay-Bandwidth Limit in Switched Networks

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Physical Review X 2019年第3期9卷 031015-031015页

作者： Mykhailo Tymchenko Dimitrios Sounas Aravind Nagulu Harish Krishnaswamy Andrea Alù Department of Electrical and Computer Engineering The University of Texas at Austin 1 University Station C0803 Austin Texas 78712 USA Department of Electrical and Computer Engineering Wayne State University Detroit Michigan 48202 USA Department of Electrical Engineering Columbia University 1300 South West Mudd 500 West 120th Street New York New York 10027 USA Photonics Initiative Advanced Science Research Center City University of New York New York New York 10031 USA Physics Program Graduate Center City University of New York New York New York 10026 USA Department of Electrical Engineering City College of New York New York New York 10031 USA

The delay-bandwidth limit implies a stringent trade-off between the time delay, bandwidth, and propagation distance of an electromagnetic signal. Here, we show that temporal modulation can overcome this constraint, enabling extremely broadband wave propagation with close-to-zero group velocity dispersion in switched multipath electronic networks. Contrary to time-invariant waveguides, in which wave propagation implies a delicate balance between electric and magnetic stored energies, in such modulated networks the stored energy is largely electrostatic in nature. We show that in this case the phase and group velocities become independent of the properties of their constituent elements, and they are controlled only by the modulation scheme. Based on these findings, we provide practical designs of deeply subwavelength CMOS-compatible reciprocal and nonreciprocal microwave components, such as delay lines, phase shifters, couplers, and circulators. The obtained results also explicitly show that temporally modulated systems are not bound by constraints of time-invariant systems and can achieve arbitrarily large delay-bandwidth products.

关键词： Metamaterials

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