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26th International Symposium on Symbolic and Numeric Algorithms for Scientific Computing, SYNASC 2024

作者： Horsthemke, Ludwig Pogorzelski, Jens Stiegekotter, Dennis Hoffmann, Frederik Bulter, Ann-Sophie Langguth, Lutz Staacke, Robert Trinschek, Sarah Gregor, Markus Glosekotter, Peter FH Münster - University of Applied Sciences Department of Electrical Engineering and Computer Science Steinfurt48565 Germany Quantum Technologies GmbH Leipzig04103 Germany FH Münster - University of Applied Sciences Department of Engineering Physics Steinfurt48565 Germany

ISBN: (纸本)9798331532833

We investigate the combined temperature and magnetic field dependent behavior of high NV-density microdiamonds in an all-optical frequency-domain based setup, utilizing the change in fluorescence lifetime. We use these frequency-domain data to train neural networks for the prediction of temperatures and magnetic fields. At zero magnetic field, we show the ability to predict temperatures in the range of 0° C to 100°C, with a standard deviation of 1.24 °C. Furthermore, we show the ability to predict applied magnetic fields, while varying the ambient temperature. We achieve a higher accuracy, compared to the approach of observing of the fluorescence intensity at a single excitation frequency. © 2024 IEEE.

关键词： Magnetometry

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Linear magnetoelectric electro-optical effect

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Physical Review B 2024年第11期110卷 115421页

作者： D. J. P. de Sousa C. O. Ascencio Tony Low Department of Electrical and Computer Engineering School of Physics and Astronomy

In this work, we derive a generalized constitutive relation describing the current response to external electromagnetic fields in electrically biased quantum materials. While our semiclassical Boltzmann approach reveals the existence of electro-optical effects induced by the Berry curvature dipole of Bloch electrons, we also find a wealth of alternative electro-optical effects originating from the interplay between Berry curvature and magnetic moment. In particular, our symmetry analysis indicates the existence of a magnetoelectric electro-optical effect, derived from the simultaneous presence of Berry curvature and magnetic moment, which requires either time-reversal or inversion symmetry breaking. The revealed conductivity coefficients are explicitly written and we derive the tensor shape describing such alternative electromagnetic responses for chiral materials pertaining to space groups 152 and 198.

关键词： Berry curvature Electro-optic effects Magnetoelectric effect Optoelectronics Magnetic moment Bloch wave theory Boltzmann theory

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Single-photon description of the lossless optical Y coupler

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Physical Review A 2024年第2期110卷 023527页

作者： Christopher R. Schwarze Anthony D. Manni David S. Simon Alexander V. Sergienko Department of Electrical and Computer Engineering & Photonics Center Department of Physics and Astronomy Department of Physics

Using symmetry considerations, we derive a unitary scattering matrix for a three-port optical Y coupler or Y branch. The result is shown to be unique up to external phase shifts. Unlike traditional passive linear-optical one-way splitters, coupling light into the conventional output ports of the Y coupler results in strong coherent back-reflections, making the device a hybrid between feed-forward devices like the beam splitter, which do not reverse the direction of light, and a recently considered class of directionally unbiased multiport scatterers (with dimension greater than two), which do. While the device could immediately find use as a novel scattering vertex for the implementation of quantum walks, we also design a few simple but nonetheless useful optical systems that can be constructed by taking advantage of the symmetry of the scattering process. This includes an interference-free, resource-efficient implementation of the Grover four-port and a higher-dimensional Fabry-Perot interferometer with tunable finesse. Symmetry-breaking generalizations are also considered.

关键词： Classical optics Electro-optical spectra Integrated optics Interference & diffraction of light Optical interferometry Optical materials & elements Optomechanics Photonics Scattering theory Transformation optics

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Multidimensional image morphing-fast image-based rendering of open 3D and VR environments

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虚拟现实与智能硬件(中英文) 2025年第2期7卷 155-172页

作者： Simon SEIBT Bastian KUTH Bartosz von Rymon LIPINSKI Thomas CHANG Marc Erich LATOSCHIK Game Tech Laboratory Faculty of Computer ScienceNuremberg Institute of TechnologyNuremberg 90489Germany Department of Electrical Engineering and Computer Science Coburg University of Applied Sciences and ArtsCoburg 96450Germany Human-Computer Interaction Group Institute of Computer ScienceUniversity of WuerzburgWuerzburg 97074Germany

Background In recent years,the demand for interactive photorealistic three-dimensional(3D)environments has increased in various fields,including architecture,engineering,and ***,achieving a balance between the quality and efficiency of high-performance 3D applications and virtual reality(VR)remains *** This study addresses this issue by revisiting and extending view interpolation for image-based rendering(IBR),which enables the exploration of spacious open environments in 3D and ***,we introduce multimorphing,a novel rendering method based on the spatial data structure of 2D image patches,called the image *** this approach,novel views can be rendered with up to six degrees of freedom using only a sparse set of *** rendering process does not require 3D reconstruction of the geometry or per-pixel depth information,and all relevant data for the output are extracted from the local morphing cells of the image *** detection of parallax image regions during preprocessing reduces rendering artifacts by extrapolating image patches from adjacent cells in *** addition,a GPU-based solution was presented to resolve exposure inconsistencies within a dataset,enabling seamless transitions of brightness when moving between areas with varying light *** Experiments on multiple real-world and synthetic scenes demonstrate that the presented method achieves high"VR-compatible"frame rates,even on mid-range and legacy hardware,*** achieving adequate visual quality even for sparse datasets,it outperforms other IBR and current neural rendering *** Using the correspondence-based decomposition of input images into morphing cells of 2D image patches,multidimensional image morphing provides high-performance novel view generation,supporting open 3D and VR ***,the handling of morphing artifacts in the parallax image regions remains a topic for future resea

关键词： computer graphics 3D real-time rendering computer vision Image morphing Virtual reality

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Light trapping enhanced broadband photodetection and imaging based on MoSe_(2)/pyramid Si vdW heterojunction

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Nano Research 2023年第7期16卷 10552-10558页

作者： Shaoqin Pan Shuo-En Wu Jinjin Hei Zhiwen Zhou Longhui Zeng Yakun Xing Pei Lin Zhifeng Shi Yongtao Tian Xinjian Li Di Wu School of Physics and Microelectronics Key Laboratory of Material PhysicsZhengzhou UniversityZhengzhou 450052China Department of Electrical and Computer Engineering University of California San DiegoLa JollaCA 92093USA Department of Electronic Engineering Chinese University of Hong KongHong Kong 999077China

Two-dimensional(2D)layered materials have been considered promising candidates for next-generation ***,the performance of 2D photodetectors still has much room for improvement due to weak light absorption of planar 2D materials and lack of high-quality heterojunction preparation ***,2D materials integrating with mature bulk semiconductors are a promising pathway to overcome this limitation and promote the practical application on *** this work,we present the patterned assembly of MoSe_(2)/pyramid Si mixed-dimensional van der Waals(vdW)heterojunction arrays for broadband photodetection and *** from the light trapping effect induced enhanced optical absorption and high-quality vdW heterojunction,the photodetector demonstrates a wide spectral response range from 265 to 1550 nm,large responsivity up to 0.67 A·W^(-1),high specific detectivity of 1.84×10^(13)Jones,and ultrafast response time of 0.34/5.6μs at 0 ***,the photodetector array exhibits outstanding broadband image sensing *** study offers a novel development route for high-performance and broadband photodetector array by MoSe_(2)/pyramid Si mixed-dimensional heterojunction.

关键词： two-dimensional(2D)MoSe_(2)layers light trapping van der Waals(vdW)heterojunction broadband photodetector selfpowered imaging

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Weak and Extremely Low Frequency Magnetic Fields Alter the Growth Rates of HT-1080 Fibrosarcoma

Weak and Extremely Low Frequency Magnetic Fields Alter the G...

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2025 United States National Committee of URSI National Radio Science Meeting, USNC-URSI NRSM 2025

作者： Dang, Nhat Keller, Jason Bajtos, Marek Gurhan, Hakki Barnes, Frank Department of Electrical Computer and Energy Engineering College of Engineering and Applied Science University of Colorado Boulder BoulderCO United States Department of Electromagnetics and Biomedical Engineering Faculty of Electrical Engineering and Information Technology University of Zilina Zilina Slovakia

ISBN: (纸本)9781946815200

This study presents experimental results showing that weak, extremely low frequency electromagnetic (EM) fields influence the growth rates of HT-1080 fibrosarcoma cells in vitro and offers a theoretical explanation for these effects. The results demonstrate that weak magnetic fields both increase and decrease the growth rates of fibrosarcoma cells by altering the mitochondrial superoxide (O2-) and calcium ions (Ca2+) concentrations in living cells. Over a 4-day exposure period, fibrosarcoma growth rates were modulated in the presence of low-level alternating current (AC) magnetic fields at a 10 μT amplitude at 13.5 Hz to 30 Hz frequency, superimposed on a 45 μT static background field. Effects due to changes in amplitude from 10 to 30 μT at selected frequencies are also investigated with the same superimposed static field. © 2025 USNC-URSI.

关键词： Electromagnetic field effects

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A Review on the Applications of Blockchain-Based Smart Contracts in the Smart Grid 4

A Review on the Applications of Blockchain-Based Smart Contr...

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4th International Conference on Smart Grid and Renewable Energy, SGRE 2024

作者： Saleh, Mohammad Alshaikh Khatri, Sunil P. Ghrayeb, Ali Refaat, Shady S. Texas A&M University Department of Electrical and Computer Engineering College Station United States Texas A&M University at Qatar Department of Electrical and Computer Engineering Doha Qatar University of Hertfordshire School of Physics Engineering and Computer Science United Kingdom

ISBN: (纸本)9798350306262

Investigations in industrial and computational research emphasize the progress of blockchain-enabled smart contracts due to their resilient features, which include decen-tralised transaction storage, autonomous contract regulation enforcement, and distributed trust creation. Blockchain-powered smart contracts can transform operational frameworks in various sectors aiming for superior service delivery. The advantages this technology brings involve a multitude of applications that span industries as cryptocurrencies, logistics systems, agricultural practices, real estate operations, and energy trading among others. Notably though one crucial emerging application is within smart grids (SG). The decentralization aspect of blockchain is one of the most significant leaps in computing for smart grids. The application of blockchain aligns with the vision of having a decentralized electric grid by distributing renewable energy sources. Therefore, numerous efforts are being conducted to examine the prospects for the relevance of smart contracts and blockchain to the smart grid system. To this end, this paper aims to review the essential elements of blockchain-based smart contracts to emphasize their current capabilities for enhancing the transition to a decentralized smart grid with proposals on future research directions. © 2024 IEEE.

关键词： Smart contract

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Scalability Analysis and Switching Hardware Requirements for a Novel Multi-Granular SDM/UWB 10 Pbps Optical Node 49

Scalability Analysis and Switching Hardware Requirements for...

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49th European Conference on Optical Communications, ECOC 2023

作者： Papapavlou, Charalampos Paximadis, Konstantinos Georgopoulos, Haris Marom, Dan M. Tomkos, Ioannis Department of Electrical and Computer Engineering University of Patras Patras26504 Greece Institute of Applied Physics Hebrew University of Jerusalem Jerusalem91904 Israel

ISBN: (纸本)9781839539954

Optical network node designs must change to address burgeoning traffic loads. We propose a novel, high-Throughput, low-loss, reconfigurable, hierarchical architecture capable of switching whole fibres, flexible-defined bands, down to individual wavelengths, achieving ~10 Pb/s throughput, which will be required by decade end. © The Institution of engineering & Technology 2023.

关键词： Reconfigurable architectures

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Robust asymmetric Cherenkov radiation in tilted anisotropic medium

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Science China(physics,Mechanics & Astronomy) 2024年第1期67卷 46-51页

作者： Shuwen Xue Yadong Xu Linkang Han Zhi Ning Chen Qiaoliang Bao Shan Zhu Huanyang Chen Institute of Electromagnetics and Acoustics and Department of Physics College of Physical Science and TechnologyJiujiang Research InstituteXiamen UniversityXiamen 361005China School of Physical Science and Technology Institute of Theoretical and Applied PhysicsSoochow UniversitySuzhou 215006China Department of Electrical and Computer Engineering National University of SingaporeSingapore 8117583Singapore Institute of Energy Materials Science(IEMS) University of Shanghai for Science and TechnologyShanghai 200093China

Cherenkov radiation(CR)is available for a wide variety of terahertz(THz)radiation sources,but its efficiency is deeply affected by intrinsic *** find that if the tilted angle(α)of anisotropic material and radiation angle(θ)meet the condition ofθ+α=π/2,the intensity of radiation fields for the charged particle bunch(CPB)moving from left to right cannot be influenced by intrinsic losses,which means long-distance radiation can be ***,we observe an asymmetric CR when the CPB moves from the opposite *** addition,we select natural van der Waals(vd W)materialα-MoO3as an example,further confirming that the radiation field can reach the far field and the asymmetric CR radiation can also be *** wonderful properties with long-distance radiation will extend the application of CR to a certain extent for future design and fabrication.

关键词： asymmetric Cherenkov radiation intrinsic losses long-distance radiation

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Quantum computer-Aided Design Automation: Optimization Algorithms and Visualization Interfaces

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IEEE Nanotechnology Magazine 2023年第2期17卷 15-25页

作者： Kuo, Shu-Yu Jiang, Yu-Chi Chou, Yao-Hsin Kuo, Sy-Yen Kung, Sun-Yuan National Taiwan University Department of Physics and Center for Theoretical Physics Taipei10617 Taiwan National Taiwan University Department of Electrical Engineering Taipei10617 Taiwan National Chi Nan University Department of Computer Science and Information Engineering Nantou54561 Taiwan National Center for Theoretical Sciences Physics Division Taipei Taiwan Center for Quantum Science and Engineering Taipei Taiwan Princeton University Department of Electrical and Computer Engineering PrincetonNJ08544 United States

Quantum computing is an essential issue for taking advantage of quantum properties in real-world applications. Realizing quantum computing with a corresponding quantum circuit is a critical step. This study introduces the AngelQ system, which provides quantum computing-as-a-service (QCaaS) for the cloud. The AngelQ system integrates quantum design automation (QDA) to achieve quantum and reversible circuit synthesis by a quantum-inspired optimization (QiO) technique and has visualization software interfaces to verify the QiO process and the correctness of the synthesized quantum and reversible circuits. First, the proposed novel QiO method has four significant features: Adaptive strategy, quantum-Not gate, update mechanism by Global solutions, and Entanglement Local search, named Angel QiO. which is a flexible technique to realize various circuits under different gate libraries with a few alterations. Angel QiO can construct diversified function-equivalent circuits to assess the circuit composition and boost the development of circuit synthesis. Second, researchers can observe the QiO algorithm process and inspect the intermediate result formula through AngelQ system's visualization interface to further adjust the parameters and improve the performance. Moreover, it benefits beginners' learning and adds convenience to education. In summary, the AngelQ system can extend and facilitate the future design and automation of quantum computing. © 2007-2011 IEEE.

关键词： Optimization

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