检索结果-内蒙古大学图书馆

arXiv 2021年

作者： Ruan, Qifeng Zhang, Wang Wang, Hao Chan, John You En Wang, Hongtao Liu, Hailong Fan, Dianyuan Li, Ying Qiu, Cheng-Wei Yang, Joel K.W. SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale Optoelectronics Shenzhen University Shenzhen518060 China Engineering Product Development Pillar Singapore University of Technology and Design 8 Somapah Road Singapore487372 Singapore Singapore Department of Electrical and Computer Engineering National University of Singapore Singapore117583 Singapore Singapore138634 Singapore

Colour changes can be achieved by straining photonic crystals or gratings embedded in stretchable materials. However, the multiple repeat units and the need for a volumetric assembly of nanostructures limit the density of information content. Inspired by surface reliefs on oracle bones and music records as means of information archival, here we endow surface-relief elastomers with multiple sets of information that are accessible by mechanical straining along in-plane axes. Distinct from Bragg diffraction effects from periodic structures, we report trenches that generate colour due to variations in trench depth, enabling individual trench segments to support a single colour. Using 3D printed cuboids, we replicated trenches of varying geometric parameters in elastomers. These parameters determine the initial colour (or lack thereof), the response to capillary forces, and the appearance when strained along or across the trenches. Strain induces modulation in trench depth or the opening and closure of a trench, resulting in surface reliefs with up to six distinct states, and an initially featureless surface that reveals two distinct images when stretched along different axes. The highly reversible structural colours are promising in optical data archival, anti-counterfeiting, and strain-sensing applications. Copyright © 2021, The Authors. All rights reserved.

关键词： Color

来源：评论

学校读者我要写书评

暂无评论

Heralded Interaction Control between Quantum Systems

引用

Physical Review Letters 2020年第22期124卷 223602-223602页

作者： Yiheng Duan Mahdi Hosseini Kristin M. Beck Vladan Vuletić Department of Physics and Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Birck Nanotechnology Center School of Electrical and Computer Engineering Purdue University West Lafayette Indiana 47907 USA IonQ College Park Maryland 20740 USA

Quantum mechanical expectation values for subsets can differ substantially from those for the whole ensemble. This implies that the effect of interactions between two systems can be altered substantially by conditioning. Here, we experimentally demonstrate that, for two light fields ψS (signal) and ψA (ancilla) that have only weakly interacted with one another, subsequent measurements on the ancilla can produce substantial conditional amplification, attenuation, or phase shift of ψS. We observe conditional signal power changes over a large range of 30, and phase shift up to π/2, induced by measurements in ancilla bases that differ only slightly from one another. The method is generically applicable to a variety of systems, and allows one to modify or boost a given interaction by trading in success probability for interaction strength.

关键词： Cavity quantum electrodynamics Electromagnetically induced transparency Quantum optics

来源：评论

学校读者我要写书评

暂无评论

Entangled sensor-networks for dark-matter searches

arXiv

引用

arXiv 2022年

作者： Brady, Anthony J. Gao, Christina Harnik, Roni Liu, Zhen Zhang, Zheshen Zhuang, Quntao Department of Electrical and Computer Engineering University of Arizona TucsonAZ85721 United States Theoretical Physics Division Fermi National Accelerator Laboratory P.O. Box 500 BataviaIL60510 United States Department of Physics University of Illinois at Urbana-Champaign UrbanaIL61801 United States Illinois Center for Advanced Studies of the Universe University of Illinois at Urbana-Champaign UrbanaIL61801 United States School of Physics and Astronomy University of Minnesota MinneapolisMN55455 United States Department of Materials Science and Engineering University of Arizona TucsonAZ85721 United States J. C. Wyant College of Optical Sciences University of Arizona TucsonAZ85721 United States

The hypothetical axion particle (of unknown mass) is a leading candidate for dark matter (DM). Many experiments search for axions with microwave cavities, where an axion may convert into a cavity photon, leading to a feeble excess in the output power of the cavity. Recent work [Nature 590, 238 (2021)] has demonstrated that injecting squeezed vacuum into the cavity can substantially accelerate the axion search. Here, we go beyond and provide a theoretical framework to leverage the benefits of quantum squeezing in a network setting consisting of many sensor-cavities. By forming a local sensor network, the signals among the cavities can be combined coherently to boost the axion search. Furthermore, injecting multipartite entanglement across the cavities-generated by splitting a squeezed vacuum-enables a global noise reduction. We explore the performance advantage of such a local, entangled sensor-network, which enjoys both coherence between the axion signals and entanglement between the sensors. Our analyses are pertinent to next-generation DM-axion searches aiming to leverage a network of sensors and quantum resources in an optimal way. Finally, we assess the possibility of using a more exotic quantum state, the Gottesman-Kitaev-Preskill (GKP) state. Despite a constant-factor improvement in the scan-time relative to a single-mode squeezed-state in the ideal case, the advantage of employing a GKP state disappears when a practical measurement scheme is considered. Copyright © 2022, The Authors. All rights reserved.

关键词： Sensor networks

来源：评论

学校读者我要写书评

暂无评论

Job2Vec: Job title benchmarking with collective multi-view representation learning

arXiv

引用

arXiv 2020年

作者： Zhang, Denghui Liu, Junming Zhu, Hengshu Liu, Yanchi Wang, Lichen Wang, Pengyang Xiong, Hui Magagement Science and Information Technology Department Rutgers University United States Baidu Talent Intelligent Center Baidu Inc China Electrical and Computer Engineering Department Northeastern University United States Computer Science Department University of Central Florida United States

Job Title Benchmarking (JTB) aims at matching job titles with similar expertise levels across various companies. JTB could provide precise guidance and considerable convenience for both talent recruitment and job seekers for position and salary calibration/prediction. Traditional JTB approaches mainly rely on manual market surveys, which is expensive and labor intensive. Recently, the rapid development of Online Professional graph has accumulated a large number of talent career records, which provides a promising trend for data-driven solutions. However, it is still a challenging task since (1) the job title and job transition (job-hopping) data is messy which contains a lot of subjective and non-standard naming conventions for a same position (e.g., Programmer, Software Development Engineer, SDE, Implementation Engineer), (2) there is a large amount of missing title/transition information, and (3) one talent only seeks limited numbers of jobs which brings the incompleteness and randomness for modeling job transition patterns. To overcome these challenges, we aggregate all the records to construct a large-scale Job Title Benchmarking Graph (Job-Graph), where nodes denote job titles affiliated with specific companies and links denote the correlations between jobs. We reformulate the JTB as the task of link prediction over the Job-Graph that matched job titles should have links. Along this line, we propose a collective multi-view representation learning method (Job2Vec) by examining the Job-Graph jointly in (1) graph topology view (the structure of relationships among job titles), (2) semantic view (semantic meaning of job descriptions), (3) job transition balance view (the numbers of bidirectional transitions between two similar-level jobs are close), and (4) job transition duration view (the shorter the average duration of transitions is, the more similar the job titles are). We fuse the multi-view representations in the encode-decode paradigm to obtain an unified o

关键词： Learning systems

来源：评论

学校读者我要写书评

暂无评论

Interpretable PET/CT Radiomic Based Prognosis Modeling of NSCLC Recurrent Following Complete Resection

Interpretable PET/CT Radiomic Based Prognosis Modeling of NS...

引用

IEEE Symposium on Nuclear Science (NSS/MIC)

作者： Mehdi Amini Shayan Mostafaei Mohamad Poursamimi Saikat Chatterjee Zahra Mansouri Mehdi Ghorbani Isaac Shiri Habib Zaidi Division of Nuclear Medicine and Molecular Imaging Geneva University Hospital Geneva Switzerland Department of Neurobiology Care Sciences and Society Division of Clinical Geriatrics Karolinska Institute Stockholm Sweden Department of Medical Physics School of Medicine Semnan University of Medical Sciences Semnan Iran Digital Futures School of Electrical Engineering and Computer Science KTH Royal Institute of Technology Stockholm Sweden Department of Biomedical Engineering and Medical Physics Shahid Beheshti University of Medical Sciences Tehran Iran Geneva University Neurocenter Geneva University Geneva Switzerland Department of Nuclear Medicine and Molecular Imaging University of Groningen University Medical Center Groningen Groningen Netherlands Department of Nuclear Medicine University of Southern Denmark Odense Denmark

This study aimed to develop an interpretable prognostic model with a nomogram for Non-Small Cell Lung Cancer (NSCLC) recurrence prediction following complete resection, using multi-modality PET/CT fusion radiomics and patients’ clinical features. Retrospectively, 181 NSCLC patients who had undergone 18 F-FDG PET/CT scan were enrolled and split into training (2/3) and testing (1/3) partitions. Before image fusion, PET and CT images were registered, resized to equal isotropic voxel size, and clipped and normalized. Guided Filtering Fusion GFF algorithm was used for image fusion. Two hundred eighteen radiomic features were extracted from each PET, CT, and fused image, including morphological, first-order statistical, and texture features. Clinical features included age, sex, smoking status, weight, radiation, chemotherapy, pathological stage, etc. Feature selection and univariate and multivariate modeling were performed using the CoxBoost algorithm. Harrell’s Concordance index (C-index) was used to evaluate the performance of the models, and compare C test was used to statistically compare the performance of the models (p-values < 0.05 were considered significant). Clinical, Clinical+PET, Clinical+CT, and Clinical+GFF resulted in c-indices (confidence interval) of 0.701 (0.589-0.812), 0.757 (0.647-0.867), 0.706 (0.607, 0.807), and 0.824 (0.751-0.896), respectively. Statistical comparison of the performance of different models with the Clinical model revealed that while PET and GFF features can significantly increase the performance (p-values 0.009 and 0.001, respectively), CT features did not significantly improve the performance of the Clinical model (p-value 0.279). Therefore, the nomogram was developed based on the Clinical+GFF model (with the best performance). Radiomic features extracted from PET and PET/CT fusion images can improve the recurrence prognosis in NSCLC patients compared to the conventional clinical factors alone.

关键词：

来源：评论

学校读者我要写书评

暂无评论

An All-optical Proteretic Switch Using Semiconductor Ring Lasers

arXiv

引用

arXiv 2020年

作者： Syed, Azeemuddin Tafazoli, Mohamad Davoudzadeh, Nima Sayeh, M.R. Center for VLSI and Embedded Systems International Institute of Information Technology Hyderabad500032 India Department of Electrical and Computer Engineering Southern Illinois University CarbondaleIL62901 United States

Proteresis, a complementary effect to well-known hysteresis, is an interesting phenomenon to be explored. As we know, the hysteric device is a bistable switch whose states depend on the system’s history whereas the proteretic device states’ depend on the future. Though an all-optical implementation of the hysteric device has been demonstrated but its complementary behavior has yet to be contrived. Therefore, this work presents the design and development of an all-optical proteretic system using semiconductor ring lasers. The design was achieved by providing a constraint feedforward path to a hysteric feedback system. Additionally, the role of various parameters was studied in order to achieve proteresis. It is observed that the proteretic effect can be achieved only for specific conditions otherwise the system behaves as a traditional hysteric device. The experimental results match well with the theoretical Simulink results. Copyright © 2020, The Authors. All rights reserved.

关键词： Hysteresis

来源：评论

学校读者我要写书评

暂无评论

Inducing a tunable skyrmion-antiskyrmion system through ion beam modification of FeGe films

npj Spintronics

引用

npj Spintronics 2024年第1期2卷 1-10页

作者： M. B. Venuti Portia Allen Serena Eley Xiyue S. Zhang David Muller Eric J. Lang Sadhvikas J. Addamane Khalid Hattar Tzu-Ming Lu Hanjong Paik Peter Sharma Department of Physics Colorado School of Mines Golden CO 80401 USA Department of Electrical & Computer Engineering University of Washington Seattle WA 98155 USA Department of Applied Physics Cornell University Ithaca NY 14853 USA Platform for the Accelerated Realization Analysis and Discovery of Interface Materials Cornell University Ithaca NY 14853 USA Department of Nuclear Engineering University of New Mexico Albuquerque NM 87131 USA Center for Integrated Nanotechnologies Sandia National Laboratories Albuquerque NM 87123 USA Department of Nuclear Engineering University of Tennessee Knoxville TN 37996 USA School of Electrical & Computer Engineering University of Oklahoma Norman OK 73019 USA Center for Quantum Research and Technology University of Oklahoma Norman OK 73019 USA Sandia National Laboratories Albuquerque NM 87123 USA

Skyrmions and antiskyrmions are nanoscale swirling textures of magnetic moments formed by chiral interactions between atomic spins in magnetic noncentrosymmetric materials and multilayer films with broken inversion symmetry. These quasiparticles are of interest for use as information carriers in next-generation, low-energy spintronic applications. To develop skyrmion-based memory and logic, we must understand skyrmion-defect interactions with two main goals—determining how skyrmions navigate intrinsic material defects and determining how to engineer disorder for optimal device operation. Here, we introduce a tunable means of creating a skyrmion-antiskyrmion system by engineering the disorder landscape in FeGe using ion irradiation. Specifically, we irradiate epitaxial B20-phase FeGe films with 2.8 MeV Au4+ions at varying fluences, inducing amorphous regions within the crystalline matrix. Using low-temperature electrical transport and magnetization measurements, we observe a strong topological Hall effect with a double-peak feature that serves as a signature of skyrmions and antiskyrmions. These results are a step towards the development of information storage devices that use skyrmions and antiskyrmions as storage bits, and our system may serve as a testbed for theoretically predicted phenomena in skyrmion-antiskyrmion crystals.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Initial On-Sky Performance testing of the Single-Photon Imager for Nanosecond Astrophysics (SPINA) system

arXiv

引用

arXiv 2023年

作者： Kit Lau, Albert Wai Shaimoldin, Nurzhan Maksut, Zhanat Chan, Yan Yan Shafiee, Mehdi Grossan, Bruce Smoot, George F. Department of Physics The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong Energetic Cosmos Laboratory Nazarbayev University Astana Kazakhstan The William H. Department of Physics and Astronomy Johns Hopkins University BaltimoreMD21218 United States Department of Electrical and Computer Engineering Nazarbayev University Astana Kazakhstan Space Sciences Laboratory University of California BerkeleyCA United States Department of Physics University of California BerkeleyCA United States Institute for Advanced Study The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong Laboratoire APC-PCCP Université Sorbonne Paris Cité Université Paris Diderot France Laboratoire Astroparticule et Cosmologie Université de Paris ParisF-75013 France Donostia International Physics Center University of the Basque Country UPV/EHU San SebastianE-48080 Spain

This work presents an initial on-sky performance measurement of the Single-Photon Imager for Nanosecond Astrophysics (SPINA) system, part of our Ultra-Fast Astronomy (UFA) program. We developed the SPINA system based on the position-sensitive silicon photomultiplier (PS-SiPM) detector to record both photoelectron (P.E.) temporal and spatial information. The initial on-sky testing of the SPINA system was successfully performed on UT 2022 Jul 10, on the 0.7-meter aperture Nazarbayev University Transient Telescope at the Assy-Turgen Astrophysical Observatory (NUTTelA-TAO). We measured stars with a wide range of brightness and a dark region of the sky without stars © 2023, CC BY-NC-ND.

关键词： Crosstalk

来源：评论

学校读者我要写书评

暂无评论

Closing of the induced gap in a hybrid superconductor-semiconductor nanowire

引用

Physical Review B 2021年第23期103卷 235201-235201页

作者： D. Puglia E. A. Martinez G. C. Ménard A. Pöschl S. Gronin G. C. Gardner R. Kallaher M. J. Manfra C. M. Marcus A. P. Higginbotham L. Casparis Microsoft Quantum Labs Copenhagen and Center for Quantum Devices Niels Bohr Institute University of Copenhagen Universitetsparken 5 2100 Copenhagen Denmark Institute of Science and Technology Austria Am Campus 1 3400 Klosterneuburg Austria Microsoft Quantum Purdue and Birck Nanotechnology Center Purdue University West Lafayette Indiana 47907 USA Department of Physics and Astronomy Purdue University West Lafayette Indiana 47907 USA School of Materials Engineering Purdue University West Lafayette Indiana 47907 USA School of Electrical and Computer Engineering Purdue University West Lafayette Indiana 47907 USA

We present conductance-matrix measurements in long, three-terminal hybrid superconductor-semiconductor nanowires, and compare with theoretical predictions of a magnetic-field-driven, topological quantum phase transition. By examining the nonlocal conductance, we identify the closure of the excitation gap in the bulk of the semiconductor before the emergence of zero-bias peaks, ruling out spurious gap-closure signatures from localized states. We observe that after the gap closes, nonlocal signals and zero-bias peaks fluctuate strongly at both ends, inconsistent with a simple picture of clean topological superconductivity.

关键词： Majorana fermions Topological materials Topological phases of matter Topological superconductors Nanowires

来源：评论

学校读者我要写书评

暂无评论

Observation of integer and fractional quantum anomalous Hall effects in twisted bilayer MoTe2

arXiv

引用

arXiv 2023年

作者： Xu, Fan Sun, Zheng Jia, Tongtong Liu, Chang Xu, Cheng Li, Chushan Gu, Yu Watanabe, Kenji Taniguchi, Takashi Tong, Bingbing Jia, Jinfeng Shi, Zhiwen Jiang, Shengwei Zhang, Yang Liu, Xiaoxue Li, Tingxin Shenyang National Laboratory for Materials Science School of Physics and Astronomy Shanghai Jiao Tong University Shanghai200240 China Tsung-Dao Lee Institute Shanghai Jiao Tong University Shanghai201210 China Department of Physics and Astronomy University of Tennessee KnoxvilleTN37996 United States State Key Laboratory of Low Dimensional Quantum Physics Department of Physics Tsinghua University Beijing100084 China Research Center for Electronic and Optical Materials National Institute for Materials Science 1-1 Namiki Tsukuba305-0044 Japan Research Center for Materials Nanoarchitectonics National Institute for Materials Science 1-1 Namiki Tsukuba305-0044 Japan Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing100190 China Hefei National Laboratory Hefei230088 China Min H. Kao Department of Electrical Engineering and Computer Science University of Tennessee KnoxvilleTN37996 United States

The interplay between strong correlations and topology can lead to the emergence of intriguing quantum states of matter. One well-known example is the fractional quantum Hall effect, where exotic electron fluids with fractionally charged excitations form in partially filled Landau levels. The emergence of topological moiré flat bands provides exciting opportunities to realize the lattice analogs of both the integer and fractional quantum Hall effects without the need for an external magnetic field. These effects are known as the integer and fractional quantum anomalous Hall (IQAH and FQAH) effects. Here, we present direct transport evidence of the existence of both IQAH and FQAH effects in small-angle-twisted bilayer MoTe2. At zero magnetic field, we observe well-quantized Hall resistance of h/e2 around moiré filling factor ν = -1 (corresponding to one hole per moiré unit cell), and nearly-quantized Hall resistance of 3h/2e2 around ν = -2/3, respectively. Concomitantly, the longitudinal resistance exhibits distinct minima around ν = -1 and -2/3. The application of an electric field induces topological quantum phase transition from the IQAH state to a charge transfer insulator at ν = -1, and from the FQAH state to a topologically trivial correlated insulator, further transitioning to a metallic state at ν = -2/3. Our study paves the way for the investigation of fractionally charged excitations and anyonic statistics at zero magnetic field based on semiconductor moiré materials. Copyright © 2023, The Authors. All rights reserved.

关键词： Electric fields

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：