检索结果-内蒙古大学图书馆

arXiv 2023年

作者： Tu, Wei-Lin Vanderstraeten, Laurens Schuch, Norbert Lee, Hyun-Yong Kawashima, Naoki Chen, Ji-Yao Faculty of Science and Technology Keio University 3-14-1 Hiyoshi Kohoku-ku Yokohama223-8522 Japan Center for Nonlinear Phenomena and Complex Systems Université Libre de Bruxelles Belgium University of Vienna Faculty of Physics Boltzmanngasse 5 Wien1090 Austria University of Vienna Faculty of Mathematics Oskar-Morgenstern-Platz 1 Wien1090 Austria Division of Display and Semiconductor Physics Korea University Sejong30019 Korea Republic of Department of Applied Physics Graduate School Korea University Sejong30019 Korea Republic of Interdisciplinary Program in E·ICT-Culture-Sports Convergence Korea University Sejong30019 Korea Republic of Institute for Solid State Physics The University of Tokyo Chiba Kashiwa277-8581 Japan Trans-scale Quantum Science Institute The University of Tokyo Bunkyo Tokyo113-0033 Japan Center for Neutron Science and Technology Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices School of Physics Sun Yat-sen University Guangzhou510275 China

Diagrammatic summation is a common bottleneck in modern applications of projected entangled-pair states, especially in computing low-energy excitations of a two-dimensional quantum many-body system. To solve this problem, here we extend the generating function approach for tensor network diagrammatic summation, a scheme previously proposed in the context of matrix product states. Taking the form of a one-particle excitation, we show that the excited state can be computed efficiently in the generating function formalism, which can further be used in evaluating the dynamical structure factor of the system. Our benchmark results for the spin-1/2 transverse-field Ising model and Heisenberg model on the square lattice provide a desirable accuracy, showing good agreement with known results. We then study the spin-1/2 J1-J2 model on the same lattice and investigate the dynamical properties of the putative gapless spin liquid phase. We conclude with a discussion on generalizations to multi-particle excitations. © 2023, CC BY.

关键词： Excited states

来源：评论

学校读者我要写书评

暂无评论

Triggered single-photon generation and resonance fluorescence in ultra-low loss integrated photonic circuits

arXiv

引用

arXiv 2022年

作者： Chanana, Ashish Larocque, Hugo Moreira, Renan Carolan, Jacques Guha, Biswarup Anant, Vikas Song, Jin Dong Englund, Dirk Blumenthal, Daniel J. Srinivasan, Kartik Davanco, Marcelo Microsystems and Nanotechnology Division Physical Measurement Laboratory National Institute of Standards and Technology GaithersburgMD20899 United States Institute for Research in Electronics and Applied Physics Maryland NanoCenter University of Maryland College ParkMD20742 United States Theiss Research San DiegoCA92037 United States Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology CambridgeMA02139 United States Department of Electrical and Computer Engineering University of California Santa Barbara Santa BarbaraCA93016 United States Joint Quantum Institute NIST University of Maryland College ParkMD20742 United States Photon Spot Inc. 142 W Olive Ave MonroviaCA91016 United States Center for Opto-Electronic Convergence Systems Korea Institute of Science and Technology Seoul136-791 Korea Republic of

A central requirement for photonic quantum information processing systems lies in the combination of nonclassical light sources and low-loss, phase-stable optical modes. While substantial progress has been made separately towards ultra-low loss, ≤1 dB/m, chip-scale photonic circuits and high brightness single-photon sources, integration of these technologies has remained elusive. Here, we report a significant advance towards this goal, in the hybrid integration of a quantum emitter single-photon source with a wafer-scale, ultra-low loss silicon nitride photonic integrated circuit. We demonstrate triggered and pure single-photon emission directly into a Si3N4photonic circuit with ≈ 1 dB/m propagation loss at a wavelength of ≈ 920 nm. These losses are more than two orders of magnitude lower than reported to date for any photonic circuit with on-chip quantum emitter sources, and >50 % lower than for any prior foundry-compatible integrated quantum photonic circuit, to the best of our knowledge. Using these circuits we report the observation of resonance fluorescence in the strong drive regime, a milestone towards integrated coherent control of quantum emitters. These results constitute an important step forward towards the creation of scaled chip-integrated photonic quantum information systems. Copyright © 2022, The Authors. All rights reserved.

关键词： Photons

来源：评论

学校读者我要写书评

暂无评论

Corrections Statement to: The Role of the Bottom Oxide Layer in Oxide-Metal-Oxide (OMO) Electrode for Stretchable Organic Light-Emitting Diodes

引用

Advanced Materials Interfaces 2024年第16期11卷

作者： Chang Min Lee Yeong Beom Kim Subrata Sarker Dong Hyun Kim Tae Wook Kim Syed Hamad Ullah Shah Hyun Woo Cho Tae-Sung Bae Seung Min Yu Yong-Cheol Kang Sangmin Han Periyanayagam Justin Jesuraj Keum-Jin Ko Myungkwan Song Chang-Su Kim Seung Yoon Ryu Department of Applied Physics Korea University-Sejong Campus 2511 Sejong-ro Sejong 30019 Republic of Korea E-ICT–Culture-Sports Convergence Track Korea University-Sejong Campus 2511 Sejong-ro Sejong 30019 Republic of Korea Department of Materials Science and Engineering Hongik University Sejong 30016 Republic of Korea Jeonju Center Korea Basic Science Institute (KBSI) 20 Geonji-ro Deokjin-gu Jeonju Jeollabuk-do 54907 Republic of Korea Department of Chemistry Pukyong National University 45 Yongso-Ro Nam-gu Busan 48513 Republic of Korea Department of Physics and Nanotechnology SRM Institute of Science and Technology Kattankulathur 603 203 India Surface Technology Division Korea Institute of Materials Science (KIMS) Changwon 51508 Republic of Korea Department of Physics Dongguk University Seoul 04620 Republic of Korea

来源：评论

学校读者我要写书评

暂无评论

Cover Image, Volume 6, Number 7, July 2024

引用

Carbon Energy 2024年第7期6卷

作者： Jeong Seok Yeon Sul Ki Park Shinik Kim Santosh V. Mohite Won Il Kim Gun Jang Hyun-Seok Jang Jiyoung Bae Sang Moon Lee Won G. Hong Byung Hoon Kim Yeonho Kim Ho Seok Park School of Chemical Engineering College of Engineering Sungkyunkwan University Gyeonggi-do Republic of Korea Department of Engineering University of Cambridge Cambridge UK Department of Applied Chemistry Konkuk University Chungju Republic of Korea Department of Chemistry Ulsan National Institute of Science and Technology (UNIST) College of Natural Sciences Ulsan Republic of Korea Department of Physics Incheon National University Incheon Republic of Korea Intelligent Sensor Convergence Research Center Incheon National University Incheon Republic of Korea Institute of Basic Science Incheon National University Incheon Republic of Korea Division of Material Analysis and Research Korea Basic Science Institute Daejeon Republic of Korea Yeonho Kim Department of Applied Chemistry Konkuk University 27478 Chungju Republic of Korea. Ho Seok Park School of Chemical Engineering College of Engineering Sungkyunkwan University 2066 Seobu-ro Jangan-gu Suwon-si 440-746 Gyeonggi-do Republic of Korea.

来源：评论

学校读者我要写书评

暂无评论

Seabed Terrain 3D Reconstruction Using 2D Forward-Looking Sonar: A Sea-Trial Report From The Pipeline Burying Project ⋆

引用

IFAC-PapersOnLine 2019年第21期52卷 175-180页

作者： Sanming Song Yan Li Zhigang Li Zhiqiang Hu Shuo Li Gun Rae Cho Ji-Hong Li State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Shenyang China Institutes for Robotics and Intelligent Manufacturing Chinese Academy of Sciences Shenyang China Applied Technology Division Korea Institute of Robot and Convergence 39 Jigok-ro Nam-gu Pohang 709-784 Republic of Korea

In this short paper, we report some preliminary results on the seabed terrain reconstruction using the two-dimensional (2D) forward-looking sonar. In the underwater pipeline burying project, when the burying machine excavating the trench using the jetting device, the stirred turbid water sharply shorten the visual distance of optical camera. Researchers from Shenyang institute of Automation, Chinese Academy of Sciences (SIA, CAS) and korea institute of robot and convergence (KIRO) work together to reconstruct the 3D environment using the acoustic camera. The proposed reconstruction procedure mainly includes two parts: 3D point-cloud extraction for each sonar frame and point-cloud registration. With the former step, the elevation information, which is irreversely lost in the acoustic imaging process, is recovered by the shape-from-shading technology under the Lambert surface assumption. With the latter, a registration method based on symmetrical Kullback-Leibler divergence has been proposed to stitch the point clouds from each sonar image into a panoramic terrain map. The initial experiment results with the sea-trial datasets demonstrate that the proposed method is feasible for the practical underwater engineering.

关键词： Seabed terrain 3D reconstruction forward-looking sonar pipeline burying shape-from-shading point-cloud registration

来源：评论

学校读者我要写书评

暂无评论

Underwater Localization using Received Signal Strength of Electromagnetic Wave with Obstacle Penetration Effects

引用

IFAC-PapersOnLine 2019年第21期52卷 372-377页

作者： Daegil Park Kyungmin Kwak Jinhyun Kim Ji-Hong Li Wan Kyun Chung Underwater Robotics R&D Division Korea Institute of Robot and Convergence Pohang Korea Future Technology Department CJ Logistics Seoul Korea Department of Mechanical & Automotive Engineering Seoul National University of Science and Technology(SeoulTECH) Seoul Korea Department of Mechanical Engineering Pohang University of Science and Technology(POSTECH) Pohang Korea

In this paper, we discuss a range sensor model using EM wave attenuation for localizing in an underwater environment with obstacles. Because an acoustic sensor is unsuitable for environment with obstacles due to the multi-path effect and diffraction, we propose a alternative range estimation method using EM wave attenuation. By considering the penetration distortion effect with underwater distance-signal attenuation model, we defined a robust EM wave attenuation function in the environment with obstacles. We performed the several experiments in order to determine the calibration factors according to the material, and the obstacle model is developed. Also, we obtained a robust localization results using the obtained sensor model with obstacle penetration effects.

关键词： Underwater Positioning Electromagnetic wave Localization EM wave Sensor

来源：评论

学校读者我要写书评

暂无评论

Thermal Hall Effects of Spins and Phonons in Kagome Antiferromagnet Cd-Kapellasite

引用

Physical Review X 2020年第4期10卷 041059-041059页

作者： Masatoshi Akazawa Masaaki Shimozawa Shunichiro Kittaka Toshiro Sakakibara Ryutaro Okuma Zenji Hiroi Hyun-Yong Lee Naoki Kawashima Jung Hoon Han Minoru Yamashita The Institute for Solid State Physics The University of Tokyo Kashiwa 277-8581 Japan Graduate School of Engineering Science Osaka University Toyonaka 560-8531 Japan Department of Physics Chuo University Kasuga Bunkyo-ku Tokyo 112-8551 Japan Okinawa Institute of Science and Technology Graduate University Kunigami-gun 904-0495 Japan Department of Applied Physics Graduate School Korea University Sejong 30019 Korea Division of Display and Semiconductor Physics Korea University Sejong 30019 Korea Interdisciplinary Program in E·ICT-Culture-Sports Convergence Korea University Sejong 30019 Korea Department of Physics Sungkyunkwan University Suwon 16419 Korea

We investigate the thermal-transport properties of the kagome antiferromagnet Cd-kapellasite (Cd-K). We find that a field-suppression effect on the longitudinal thermal conductivity κxx sets in below approximately 25 K. This field-suppression effect at 15 T becomes as large as 80% at low temperatures, suggesting a large spin contribution κxxsp in κxx. We also find clear thermal Hall signals in the spin liquid phase in all Cd-K samples. The magnitude of the thermal Hall conductivity κxy shows a significant dependence on the sample’s scattering time, as seen in the rise of the peak κxy value in almost linear fashion with the magnitude of κxx. On the other hand, the temperature dependence of κxy is similar in all Cd-K samples; κxy shows a peak at almost the same temperature of the peak of the phonon thermal conductivity κxxph which is estimated by κxx at 15 T. These results indicate the presence of a dominant phonon thermal Hall κxyph at 15 T. In addition to κxyph, we find that the field dependence of κxy at low fields turns out to be nonlinear at low temperatures, concomitantly with the appearance of the field suppression of κxx, indicating the presence of a spin thermal Hall κxysp at low fields. Remarkably, by assembling the κxx dependence of κxysp data of other kagome antiferromagnets, we find that, whereas κxysp stays a constant in the low-κxx region, κxysp starts to increase as κxx does in the high-κxx region. This κxx dependence of κxysp indicates the presence of both intrinsic and extrinsic mechanisms in the spin thermal Hall effect in kagome antiferromagnets. Furthermore, both κxyph and κxysp disappear in the antiferromagnetic ordered phase at low fields, showing that phonons alone do not exhibit the thermal Hall effect. A high field above approximately 7 T induces κxyph, concomitantly with a field-induced increase of κxx and the specific heat, suggesting a coupling of the phonons to the field-induced spin excitations as the origin of κxyph.

关键词： Frustrated magnetism Spin liquid Thermal Hall effect Thermal conductivity

来源：评论

学校读者我要写书评

暂无评论

Author Correction: Highly efficient, heat dissipating, stretchable organic light-emitting diodes based on a MoO3/Au/MoO3 electrode with encapsulation

引用

Nature communications 2021年第1期12卷 7355页

作者： Dae Keun Choi Dong Hyun Kim Chang Min Lee Hassan Hafeez Subrata Sarker Jun Su Yang Hyung Ju Chae Geon-Woo Jeong Dong Hyun Choi Tae Wook Kim Seunghyup Yoo Jinouk Song Boo Soo Ma Taek-Soo Kim Chul Hoon Kim Hyun Jae Lee Jae Woo Lee Donghyun Kim Tae-Sung Bae Seung Min Yu Yong-Cheol Kang Juyun Park Kyoung-Ho Kim Muhammad Sujak Myungkwan Song Chang-Su Kim Seung Yoon Ryu Division of Display and Semiconductor Physics Display Convergence College of Science and Technology Korea University Sejong Campus Sejong City Republic of Korea. Department of Applied Physics Korea University Sejong Campus Sejong City Republic of Korea. E-ICT-Culture-Sports Convergence Track Korea University Sejong Campus Sejong City Republic of Korea. Division of Display and Semiconductor Physics Display Convergence College of Science and Technology Korea University Sejong Campus Sejong City Republic of Korea. hassaniskt@***. Department of Applied Physics Korea University Sejong Campus Sejong City Republic of Korea. hassaniskt@***. School of Electrical Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon Republic of Korea. Department of Mechanical Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon Republic of Korea. Department of Advanced Materials Chemistry College of Science and Technology Korea University Sejong Campus Sejong City Republic of Korea. Interdisciplinary Graduate Program for Artificial Intelligence Smart Convergence Technology Korea University Sejong Republic of Korea. Jeonju Center Korea Basic Science Institute (KBSI) Analysis & Researcher Division Jeollabuk-do Republic of Korea. Department of Chemistry Pukyong National University 45 Yongso-Ro Nam-gu Busan Republic of Korea. Department of Physics Chungbuk National University Cheongju Republic of Korea. Surface Materials Division Korea Institute of Materials Science (KIMS) Changwon Republic of Korea. Surface Materials Division Korea Institute of Materials Science (KIMS) Changwon Republic of Korea. cskim1025@kims.re.kr. Division of Display and Semiconductor Physics Display Convergence College of Science and Technology Korea University Sejong Campus Sejong City Republic of Korea. justie74@korea.ac.kr. Department of Applied Physics Korea University Sejong Campus Sejong City Republic of Korea. justie74@korea.ac.kr. E-ICT-Culture-Sports Conve

来源：评论

学校读者我要写书评

暂无评论

Correction to: Preparation of high-crystallinity synthetic graphite from hard carbon-based carbon black

引用

applied Physics A 2021年第5期127卷 1-1页

作者： Min Il Kim Jong Hoon Cho Jin Ung Hwang Byong Chol Bai Ji Sun Im C1 Gas & Carbon Convergent Research Center Korea Research Institute of Chemical Technology Daejeon Republic of Korea Department of Applied Chemical Engineering Chungnam National University Daejeon Republic of Korea Department of Chemical Engineering Chungbuk National University Cheongju Republic of Korea Division of Energy Engineering Daejin University Pocheon Republic of Korea Korea Institute of Convergence Textile Iksan-si Republic of Korea Advanced Materials and Chemical Engineering University of Science and Technology (UST) Daejeon Republic of Korea

A correction to this paper has been published: https://***/10.1007/s00339-021-04471-3

关键词：

来源：评论

学校读者我要写书评

暂无评论

Entanglement properties of disordered quantum spin chains with long-range antiferromagnetic interactions

引用

Physical Review B 2020年第21期102卷 214201-214201页

作者： Y. Mohdeb J. Vahedi N. Moure A. Roshani Hyun-Yong Lee R. N. Bhatt Stefan Kettemann Stephan Haas Department of Physics and Earth Sciences Jacobs University Bremen Bremen 28759 Germany Technische Universität Braunschweig Institut für Mathematische Physik Mendelssohnstr. 3 38106 Braunschweig Germany Department of Physics Sari Branch Islamic Azad University Sari 48164-194 Iran Department of Physics and Astronomy University of Southern California Los Angeles California 90089-0484 USA Department of Applied Physics Graduate School Korea University Sejong 30019 Korea Division of Display and Semiconductor Physics Korea University Sejong 30019 Korea Interdisciplinary Program in EċICT-Culture-Sports Convergence Korea University Sejong 30019 Korea Department of Electrical Engineering Princeton University Princeton New Jersey 08544 USA School of Natural Sciences Institute for Advanced Study Princeton New Jersey 08540 USA Division of Advanced Materials Science Pohang University of Science and Technology (POSTECH) Pohang 790-784 Korea

Entanglement measures are useful tools in characterizing otherwise unknown quantum phases and indicating transitions between them. Here we examine the concurrence and entanglement entropy in quantum spin chains with random long-range couplings, spatially decaying with a power-law exponent α. Using the strong disorder renormalization group (SDRG) technique, we find by analytical solution of the master equation a strong disorder fixed point, characterized by a fixed point distribution of the couplings with a finite dynamical exponent, which describes the system consistently in the regime α>12. A numerical implementation of the SDRG method yields a power-law spatial decay of the average concurrence, which is also confirmed by exact numerical diagonalization. However, we find that the lowest-order SDRG approach is not sufficient to obtain the typical value of the concurrence. We therefore implement a correction scheme which allows us to obtain the leading-order corrections to the random singlet state. This approach yields a power-law spatial decay of the typical value of the concurrence, which we derive both by a numerical implementation of the corrections and by analytics. Next, using numerical SDRG, the entanglement entropy (EE) is found to be logarithmically enhanced for all α, corresponding to a critical behavior with an effective central charge c=ln(2), independent of α. This is confirmed by an analytical derivation. Using numerical exact diagonalization (ED), we confirm the logarithmic enhancement of the EE and a weak dependence on α. For a wide range of partition size l, the EE fits a critical behavior with a central charge close to c=1, which is the same as for the clean Haldane-Shastry model with a power-law-decaying interaction with α=2. Only for small l≪L, in a range which increases with the number of spins N, we find deviations which are rather consistent with the strong disorder fixed point central charge c=ln(2). Furthermore, we find using ED that the conc

关键词： Magnetism Quantum entanglement Disordered systems Doped semiconductors Density matrix methods Exact diagonalization Renormalization group Tensor network methods

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：